iotjava/iotpolicy/IoTCompiler.java

   1 package iotpolicy;
   2
   3 import java_cup.runtime.ComplexSymbolFactory;
   4 import java_cup.runtime.ScannerBuffer;
   5 import java.io.*;
   6 import java.util.Arrays;
   7 import java.util.ArrayList;
   8 import java.util.Collection;
   9 import java.util.Collections;
  10 import java.util.HashMap;
  11 import java.util.HashSet;
  12 import java.util.Iterator;
  13 import java.util.List;
  14 import java.util.Map;
  15 import java.util.Set;
  16
  17 import iotpolicy.parser.Lexer;
  18 import iotpolicy.parser.Parser;
  19 import iotpolicy.tree.ParseNode;
  20 import iotpolicy.tree.ParseNodeVector;
  21 import iotpolicy.tree.ParseTreeHandler;
  22 import iotpolicy.tree.Declaration;
  23 import iotpolicy.tree.DeclarationHandler;
  24 import iotpolicy.tree.CapabilityDecl;
  25 import iotpolicy.tree.InterfaceDecl;
  26 import iotpolicy.tree.RequiresDecl;
  27 import iotpolicy.tree.EnumDecl;
  28 import iotpolicy.tree.StructDecl;
  29
  30 import iotrmi.Java.IoTRMITypes;
  31
  32
  33 /** Class IoTCompiler is the main interface/stub compiler for
  34  *  files generation. This class calls helper classes
  35  *  such as Parser, Lexer, InterfaceDecl, CapabilityDecl,
  36  *  RequiresDecl, ParseTreeHandler, etc.
  37  *
  38  * @author      Rahmadi Trimananda <rahmadi.trimananda @ uci.edu>
  39  * @version     1.0
  40  * @since       2016-09-22
  41  */
  42 public class IoTCompiler {
  43
  44         /**
  45          * Class properties
  46          */
  47         // Maps multiple interfaces to multiple objects of ParseTreeHandler
  48         private Map<String,ParseTreeHandler> mapIntfacePTH;
  49         private Map<String,DeclarationHandler> mapIntDeclHand;
  50         private Map<String,Map<String,Set<String>>> mapInt2NewInts;
  51         // Data structure to store our types (primitives and non-primitives) for compilation
  52         private Map<String,String> mapPrimitives;
  53         private Map<String,String> mapNonPrimitivesJava;
  54         private Map<String,String> mapNonPrimitivesCplus;
  55         // Other data structures
  56         private Map<String,Integer> mapIntfaceObjId;            // Maps interface name to object Id
  57         private Map<String,Integer> mapNewIntfaceObjId;         // Maps new interface name to its object Id (keep track of stubs)
  58         private PrintWriter pw;
  59         private String dir;
  60         private String subdir;
  61
  62
  63         /**
  64          * Class constants
  65          */
  66         private final static String OUTPUT_DIRECTORY = "output_files";
  67
  68         private enum ParamCategory {
  69
  70                 PRIMITIVES,             // All the primitive types, e.g. byte, short, int, long, etc.
  71                 NONPRIMITIVES,  // Non-primitive types, e.g. Set, Map, List, etc.
  72                 ENUM,                   // Enum type
  73                 STRUCT,                 // Struct type
  74                 USERDEFINED             // Assumed as driver classes
  75         }
  76
  77
  78         /**
  79          * Class constructors
  80          */
  81         public IoTCompiler() {
  82
  83                 mapIntfacePTH = new HashMap<String,ParseTreeHandler>();
  84                 mapIntDeclHand = new HashMap<String,DeclarationHandler>();
  85                 mapInt2NewInts = new HashMap<String,Map<String,Set<String>>>();
  86                 mapIntfaceObjId = new HashMap<String,Integer>();
  87                 mapNewIntfaceObjId = new HashMap<String,Integer>();
  88                 mapPrimitives = new HashMap<String,String>();
  89                         arraysToMap(mapPrimitives, IoTRMITypes.primitivesJava, IoTRMITypes.primitivesCplus);
  90                 mapNonPrimitivesJava = new HashMap<String,String>();
  91                         arraysToMap(mapNonPrimitivesJava, IoTRMITypes.nonPrimitivesJava, IoTRMITypes.nonPrimitiveJavaLibs);
  92                 mapNonPrimitivesCplus = new HashMap<String,String>();
  93                         arraysToMap(mapNonPrimitivesCplus, IoTRMITypes.nonPrimitivesJava, IoTRMITypes.nonPrimitivesCplus);
  94                 pw = null;
  95                 dir = OUTPUT_DIRECTORY;
  96                 subdir = null;
  97         }
  98
  99
 100         /**
 101          * setDataStructures() sets parse tree and other data structures based on policy files.
 102          * <p>
 103          * It also generates parse tree (ParseTreeHandler) and
 104          * copies useful information from parse tree into
 105          * InterfaceDecl, CapabilityDecl, and RequiresDecl
 106          * data structures.
 107          * Additionally, the data structure handles are
 108          * returned from tree-parsing for further process.
 109          */
 110         public void setDataStructures(String origInt, ParseNode pnPol, ParseNode pnReq) {
 111
 112                 ParseTreeHandler ptHandler = new ParseTreeHandler(origInt, pnPol, pnReq);
 113                 DeclarationHandler decHandler = new DeclarationHandler();
 114                 // Process ParseNode and generate Declaration objects
 115                 // Interface
 116                 ptHandler.processInterfaceDecl();
 117                 InterfaceDecl intDecl = ptHandler.getInterfaceDecl();
 118                 decHandler.addInterfaceDecl(origInt, intDecl);
 119                 // Capabilities
 120                 ptHandler.processCapabilityDecl();
 121                 CapabilityDecl capDecl = ptHandler.getCapabilityDecl();
 122                 decHandler.addCapabilityDecl(origInt, capDecl);
 123                 // Requires
 124                 ptHandler.processRequiresDecl();
 125                 RequiresDecl reqDecl = ptHandler.getRequiresDecl();
 126                 decHandler.addRequiresDecl(origInt, reqDecl);
 127                 // Enumeration
 128                 ptHandler.processEnumDecl();
 129                 EnumDecl enumDecl = ptHandler.getEnumDecl();
 130                 decHandler.addEnumDecl(origInt, enumDecl);
 131                 // Struct
 132                 ptHandler.processStructDecl();
 133                 StructDecl structDecl = ptHandler.getStructDecl();
 134                 decHandler.addStructDecl(origInt, structDecl);
 135
 136                 mapIntfacePTH.put(origInt, ptHandler);
 137                 mapIntDeclHand.put(origInt, decHandler);
 138                 // Set object Id counter to 0 for each interface
 139                 mapIntfaceObjId.put(origInt, new Integer(0));
 140         }
 141
 142
 143         /**
 144          * getMethodsForIntface() reads for methods in the data structure
 145          * <p>
 146          * It is going to give list of methods for a certain interface
 147          *              based on the declaration of capabilities.
 148          */
 149         public void getMethodsForIntface(String origInt) {
 150
 151                 ParseTreeHandler ptHandler = mapIntfacePTH.get(origInt);
 152                 Map<String,Set<String>> mapNewIntMethods = new HashMap<String,Set<String>>();
 153                 // Get set of new interfaces, e.g. CameraWithCaptureAndData
 154                 // Generate this new interface with all the methods it needs
 155                 //              from different capabilities it declares
 156                 DeclarationHandler decHandler = mapIntDeclHand.get(origInt);
 157                 RequiresDecl reqDecl = (RequiresDecl) decHandler.getRequiresDecl(origInt);
 158                 Set<String> setIntfaces = reqDecl.getInterfaces();
 159                 for (String strInt : setIntfaces) {
 160
 161                         // Initialize a set of methods
 162                         Set<String> setMethods = new HashSet<String>();
 163                         // Get list of capabilities, e.g. ImageCapture, VideoRecording, etc.
 164                         List<String> listCapab = reqDecl.getCapabList(strInt);
 165                         for (String strCap : listCapab) {
 166
 167                                 // Get list of methods for each capability
 168                                 CapabilityDecl capDecl = (CapabilityDecl) decHandler.getCapabilityDecl(origInt);
 169                                 List<String> listCapabMeth = capDecl.getMethods(strCap);
 170                                 for (String strMeth : listCapabMeth) {
 171
 172                                         // Add methods into setMethods
 173                                         // This is to also handle redundancies (say two capabilities
 174                                         //              share the same methods)
 175                                         setMethods.add(strMeth);
 176                                 }
 177                         }
 178                         // Add interface and methods information into map
 179                         mapNewIntMethods.put(strInt, setMethods);
 180                 }
 181                 // Map the map of interface-methods to the original interface
 182                 mapInt2NewInts.put(origInt, mapNewIntMethods);
 183         }
 184
 185
 186         /**
 187          * HELPER: writeMethodJavaLocalInterface() writes the method of the local interface
 188          */
 189         private void writeMethodJavaLocalInterface(Collection<String> methods, InterfaceDecl intDecl) {
 190
 191                 for (String method : methods) {
 192
 193                         List<String> methParams = intDecl.getMethodParams(method);
 194                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
 195                         print("public " + intDecl.getMethodType(method) + " " +
 196                                 intDecl.getMethodId(method) + "(");
 197                         for (int i = 0; i < methParams.size(); i++) {
 198                                 // Check for params with driver class types and exchange it
 199                                 //              with its remote interface
 200                                 String paramType = checkAndGetParamClass(methPrmTypes.get(i));
 201                                 print(paramType + " " + methParams.get(i));
 202                                 // Check if this is the last element (don't print a comma)
 203                                 if (i != methParams.size() - 1) {
 204                                         print(", ");
 205                                 }
 206                         }
 207                         println(");");
 208                 }
 209         }
 210
 211
 212         /**
 213          * HELPER: writeMethodJavaInterface() writes the method of the interface
 214          */
 215         private void writeMethodJavaInterface(Collection<String> methods, InterfaceDecl intDecl) {
 216
 217                 for (String method : methods) {
 218
 219                         List<String> methParams = intDecl.getMethodParams(method);
 220                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
 221                         print("public " + intDecl.getMethodType(method) + " " +
 222                                 intDecl.getMethodId(method) + "(");
 223                         for (int i = 0; i < methParams.size(); i++) {
 224                                 // Check for params with driver class types and exchange it
 225                                 //              with its remote interface
 226                                 String paramType = methPrmTypes.get(i);
 227                                 print(paramType + " " + methParams.get(i));
 228                                 // Check if this is the last element (don't print a comma)
 229                                 if (i != methParams.size() - 1) {
 230                                         print(", ");
 231                                 }
 232                         }
 233                         println(");");
 234                 }
 235         }
 236
 237
 238         /**
 239          * HELPER: generateEnumJava() writes the enumeration declaration
 240          */
 241         private void generateEnumJava() throws IOException {
 242
 243                 // Create a new directory
 244                 createDirectory(dir);
 245                 for (String intface : mapIntfacePTH.keySet()) {
 246                         // Get the right EnumDecl
 247                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
 248                         EnumDecl enumDecl = (EnumDecl) decHandler.getEnumDecl(intface);
 249                         Set<String> enumTypes = enumDecl.getEnumDeclarations();
 250                         // Iterate over enum declarations
 251                         for (String enType : enumTypes) {
 252                                 // Open a new file to write into
 253                                 FileWriter fw = new FileWriter(dir + "/" + enType + ".java");
 254                                 pw = new PrintWriter(new BufferedWriter(fw));
 255                                 println("public enum " + enType + " {");
 256                                 List<String> enumMembers = enumDecl.getMembers(enType);
 257                                 for (int i = 0; i < enumMembers.size(); i++) {
 258
 259                                         String member = enumMembers.get(i);
 260                                         print(member);
 261                                         // Check if this is the last element (don't print a comma)
 262                                         if (i != enumMembers.size() - 1)
 263                                                 println(",");
 264                                         else
 265                                                 println("");
 266                                 }
 267                                 println("}\n");
 268                                 pw.close();
 269                                 System.out.println("IoTCompiler: Generated enum class " + enType + ".java...");
 270                         }
 271                 }
 272         }
 273
 274
 275         /**
 276          * HELPER: generateStructJava() writes the struct declaration
 277          */
 278         private void generateStructJava() throws IOException {
 279
 280                 // Create a new directory
 281                 createDirectory(dir);
 282                 for (String intface : mapIntfacePTH.keySet()) {
 283                         // Get the right StructDecl
 284                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
 285                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
 286                         List<String> structTypes = structDecl.getStructTypes();
 287                         // Iterate over enum declarations
 288                         for (String stType : structTypes) {
 289                                 // Open a new file to write into
 290                                 FileWriter fw = new FileWriter(dir + "/" + stType + ".java");
 291                                 pw = new PrintWriter(new BufferedWriter(fw));
 292                                 println("public class " + stType + " {");
 293                                 List<String> structMemberTypes = structDecl.getMemberTypes(stType);
 294                                 List<String> structMembers = structDecl.getMembers(stType);
 295                                 for (int i = 0; i < structMembers.size(); i++) {
 296
 297                                         String memberType = structMemberTypes.get(i);
 298                                         String member = structMembers.get(i);
 299                                         println("public static " + memberType + " " + member + ";");
 300                                 }
 301                                 println("}\n");
 302                                 pw.close();
 303                                 System.out.println("IoTCompiler: Generated struct class " + stType + ".java...");
 304                         }
 305                 }
 306         }
 307
 308
 309         /**
 310          * generateJavaLocalInterface() writes the local interface and provides type-checking.
 311          * <p>
 312          * It needs to rewrite and exchange USERDEFINED types in input parameters of stub
 313          * and original interfaces, e.g. exchange Camera and CameraWithVideoAndRecording.
 314          * The local interface has to be the input parameter for the stub and the stub
 315          * interface has to be the input parameter for the local class.
 316          */
 317         public void generateJavaLocalInterfaces() throws IOException {
 318
 319                 // Create a new directory
 320                 createDirectory(dir);
 321                 for (String intface : mapIntfacePTH.keySet()) {
 322                         // Open a new file to write into
 323                         FileWriter fw = new FileWriter(dir + "/" + intface + ".java");
 324                         pw = new PrintWriter(new BufferedWriter(fw));
 325                         // Pass in set of methods and get import classes
 326                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
 327                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
 328                         List<String> methods = intDecl.getMethods();
 329                         Set<String> importClasses = getImportClasses(methods, intDecl);
 330                         List<String> stdImportClasses = getStandardJavaIntfaceImportClasses();
 331                         List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
 332                         printImportStatements(allImportClasses);
 333                         // Write interface header
 334                         println("");
 335                         println("public interface " + intface + " {");
 336                         // Write methods
 337                         writeMethodJavaLocalInterface(methods, intDecl);
 338                         println("}");
 339                         pw.close();
 340                         System.out.println("IoTCompiler: Generated local interface " + intface + ".java...");
 341                 }
 342         }
 343
 344
 345         /**
 346          * generateJavaInterfaces() generate stub interfaces based on the methods list in Java
 347          */
 348         public void generateJavaInterfaces() throws IOException {
 349
 350                 // Create a new directory
 351                 String path = createDirectories(dir, subdir);
 352                 for (String intface : mapIntfacePTH.keySet()) {
 353
 354                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
 355                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
 356
 357                                 // Open a new file to write into
 358                                 String newIntface = intMeth.getKey();
 359                                 FileWriter fw = new FileWriter(path + "/" + newIntface + ".java");
 360                                 pw = new PrintWriter(new BufferedWriter(fw));
 361                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
 362                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
 363                                 // Pass in set of methods and get import classes
 364                                 List<String> methods = intDecl.getMethods();
 365                                 Set<String> importClasses = getImportClasses(methods, intDecl);
 366                                 List<String> stdImportClasses = getStandardJavaIntfaceImportClasses();
 367                                 List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
 368                                 printImportStatements(allImportClasses);
 369                                 // Write interface header
 370                                 println("");
 371                                 println("public interface " + newIntface + " {\n");
 372                                 // Write methods
 373                                 writeMethodJavaInterface(methods, intDecl);
 374                                 println("}");
 375                                 pw.close();
 376                                 System.out.println("IoTCompiler: Generated interface " + newIntface + ".java...");
 377                         }
 378                 }
 379         }
 380
 381
 382         /**
 383          * HELPER: writePropertiesJavaPermission() writes the permission in properties
 384          */
 385         private void writePropertiesJavaPermission(String intface, InterfaceDecl intDecl) {
 386
 387                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
 388                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
 389                         String newIntface = intMeth.getKey();
 390                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
 391                         println("private final static int object" + newObjectId + "Id = " +
 392                                 newObjectId + ";\t//" + newIntface);
 393                         Set<String> methodIds = intMeth.getValue();
 394                         print("private static Integer[] object" + newObjectId + "Permission = { ");
 395                         int i = 0;
 396                         for (String methodId : methodIds) {
 397                                 int methodNumId = intDecl.getMethodNumId(methodId);
 398                                 print(Integer.toString(methodNumId));
 399                                 // Check if this is the last element (don't print a comma)
 400                                 if (i != methodIds.size() - 1) {
 401                                         print(", ");
 402                                 }
 403                                 i++;
 404                         }
 405                         println(" };");
 406                         println("private List<Integer> set" + newObjectId + "Allowed;");
 407                 }
 408         }
 409
 410
 411         /**
 412          * HELPER: writePropertiesJavaStub() writes the properties of the stub class
 413          */
 414         private void writePropertiesJavaStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
 415
 416                 println("private IoTRMICall rmiCall;");
 417                 println("private String address;");
 418                 println("private int[] ports;\n");
 419                 // Get the object Id
 420                 Integer objId = mapIntfaceObjId.get(intface);
 421                 println("private final static int objectId = " + objId + ";");
 422                 mapNewIntfaceObjId.put(newIntface, objId);
 423                 mapIntfaceObjId.put(intface, objId++);
 424                 if (callbackExist) {
 425                 // We assume that each class only has one callback interface for now
 426                         Iterator it = callbackClasses.iterator();
 427                         String callbackType = (String) it.next();
 428                         println("// Callback properties");
 429                         println("private IoTRMIObject rmiObj;");
 430                         println("List<" + callbackType + "> listCallbackObj;");
 431                         println("private static int objIdCnt = 0;");
 432                         // Generate permission stuff for callback stubs
 433                         DeclarationHandler decHandler = mapIntDeclHand.get(callbackType);
 434                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(callbackType);
 435                         writePropertiesJavaPermission(callbackType, intDecl);
 436                 }
 437                 println("\n");
 438         }
 439
 440
 441         /**
 442          * HELPER: writeConstructorJavaPermission() writes the permission in constructor
 443          */
 444         private void writeConstructorJavaPermission(String intface) {
 445
 446                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
 447                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
 448                         String newIntface = intMeth.getKey();
 449                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
 450                         println("set" + newObjectId + "Allowed = Arrays.asList(object" + newObjectId +"Permission);");
 451                 }
 452         }
 453
 454
 455         /**
 456          * HELPER: writeConstructorJavaStub() writes the constructor of the stub class
 457          */
 458         private void writeConstructorJavaStub(String intface, String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
 459
 460                 println("public " + newStubClass + "(int _port, String _address, int _rev, int[] _ports) throws Exception {");
 461                 println("address = _address;");
 462                 println("ports = _ports;");
 463                 println("rmiCall = new IoTRMICall(_port, _address, _rev);");
 464                 if (callbackExist) {
 465                         Iterator it = callbackClasses.iterator();
 466                         String callbackType = (String) it.next();
 467                         writeConstructorJavaPermission(intface);
 468                         println("listCallbackObj = new ArrayList<" + callbackType + ">();");
 469                         println("___initCallBack();");
 470                 }
 471                 println("}\n");
 472         }
 473
 474
 475         /**
 476          * HELPER: writeJavaMethodCallbackPermission() writes permission checks in stub for callbacks
 477          */
 478         private void writeJavaMethodCallbackPermission(String intface) {
 479
 480                 println("int methodId = IoTRMIObject.getMethodId(method);");
 481                 // Get all the different stubs
 482                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
 483                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
 484                         String newIntface = intMeth.getKey();
 485                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
 486                         println("if (!set" + newObjectId + "Allowed.contains(methodId)) {");
 487                         println("throw new Error(\"Callback object for " + intface + " is not allowed to access method: \" + methodId);");
 488                         println("}");
 489                 }
 490         }
 491
 492
 493         /**
 494          * HELPER: writeInitCallbackJavaStub() writes callback initialization in stub
 495          */
 496         private void writeInitCallbackJavaStub(String intface, InterfaceDecl intDecl) {
 497
 498                 println("public void ___initCallBack() {");
 499                 // Generate main thread for callbacks
 500                 println("Thread thread = new Thread() {");
 501                 println("public void run() {");
 502                 println("try {");
 503                 println("rmiObj = new IoTRMIObject(ports[0]);");
 504                 println("while (true) {");
 505                 println("byte[] method = rmiObj.getMethodBytes();");
 506                 writeJavaMethodCallbackPermission(intface);
 507                 println("int objId = IoTRMIObject.getObjectId(method);");
 508                 println(intface + "_CallbackSkeleton skel = (" + intface + "_CallbackSkeleton) listCallbackObj.get(objId);");
 509                 println("if (skel != null) {");
 510                 println("skel.invokeMethod(rmiObj);");
 511                 println("} else {");
 512                 println("throw new Error(\"" + intface + ": Object with Id \" + objId + \" not found!\");");
 513                 println("}");
 514                 println("}");
 515                 println("} catch (Exception ex) {");
 516                 println("ex.printStackTrace();");
 517                 println("throw new Error(\"Error instantiating class " + intface + "_CallbackSkeleton!\");");
 518                 println("}");
 519                 println("}");
 520                 println("};");
 521                 println("thread.start();\n");
 522                 // Generate info sending part
 523                 String method = "___initCallBack()";
 524                 println("int methodId = " + intDecl.getHelperMethodNumId(method) + ";");
 525                 println("Class<?> retType = void.class;");
 526                 println("Class<?>[] paramCls = new Class<?>[] { int.class, String.class, int.class };");
 527                 println("Object[] paramObj = new Object[] { ports[0], address, 0 };");
 528                 println("rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 529                 println("}\n");
 530         }
 531
 532
 533         /**
 534          * HELPER: checkAndWriteEnumTypeJavaStub() writes the enum type (convert from enum to int)
 535          */
 536         private void checkAndWriteEnumTypeJavaStub(List<String> methParams, List<String> methPrmTypes) {
 537
 538                 // Iterate and find enum declarations
 539                 for (int i = 0; i < methParams.size(); i++) {
 540                         String paramType = methPrmTypes.get(i);
 541                         String param = methParams.get(i);
 542                         String simpleType = getSimpleType(paramType);
 543                         if (isEnumClass(simpleType)) {
 544                         // Check if this is enum type
 545                                 if (isArray(param)) {   // An array
 546                                         println("int len" + i + " = " + param + ".length;");
 547                                         println("int paramEnum" + i + "[] = new int[len];");
 548                                         println("for (int i = 0; i < len" + i + "; i++) {");
 549                                         println("paramEnum" + i + "[i] = " + param + "[i].ordinal();");
 550                                         println("}");
 551                                 } else if (isList(paramType)) { // A list
 552                                         println("int len" + i + " = " + param + ".size();");
 553                                         println("int paramEnum" + i + "[] = new int[len];");
 554                                         println("for (int i = 0; i < len" + i + "; i++) {");
 555                                         println("paramEnum" + i + "[i] = " + param + ".get(i).ordinal();");
 556                                         println("}");
 557                                 } else {        // Just one element
 558                                         println("int paramEnum" + i + "[] = new int[1];");
 559                                         println("paramEnum" + i + "[0] = " + param + ".ordinal();");
 560                                 }
 561                         }
 562                 }
 563         }
 564
 565
 566         /**
 567          * HELPER: checkAndWriteEnumRetTypeJavaStub() writes the enum return type (convert from enum to int)
 568          */
 569         private void checkAndWriteEnumRetTypeJavaStub(String retType) {
 570
 571                 // Strips off array "[]" for return type
 572                 String pureType = getSimpleArrayType(getSimpleType(retType));
 573                 // Take the inner type of generic
 574                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
 575                         pureType = getTypeOfGeneric(retType)[0];
 576                 if (isEnumClass(pureType)) {
 577                 // Check if this is enum type
 578                         // Enum decoder
 579                         println("int[] retEnum = (int[]) retObj;");
 580                         println(pureType + "[] enumVals = " + pureType + ".values();");
 581                         if (isArray(retType)) {                 // An array
 582                                 println("int retLen = retEnum.length;");
 583                                 println(pureType + "[] enumRetVal = new " + pureType + "[retLen];");
 584                                 println("for (int i = 0; i < retLen; i++) {");
 585                                 println("enumRetVal[i] = enumVals[retEnum[i]];");
 586                                 println("}");
 587                         } else if (isList(retType)) {   // A list
 588                                 println("int retLen = retEnum.length;");
 589                                 println("List<" + pureType + "> enumRetVal = new ArrayList<" + pureType + ">();");
 590                                 println("for (int i = 0; i < retLen; i++) {");
 591                                 println("enumRetVal.add(enumVals[retEnum[i]]);");
 592                                 println("}");
 593                         } else {        // Just one element
 594                                 println(pureType + " enumRetVal = enumVals[retEnum[0]];");
 595                         }
 596                         println("return enumRetVal;");
 597                 }
 598         }
 599
 600
 601         /**
 602          * HELPER: checkAndWriteStructSetupJavaStub() writes the struct type setup
 603          */
 604         private void checkAndWriteStructSetupJavaStub(List<String> methParams, List<String> methPrmTypes,
 605                         InterfaceDecl intDecl, String method) {
 606
 607                 // Iterate and find struct declarations
 608                 for (int i = 0; i < methParams.size(); i++) {
 609                         String paramType = methPrmTypes.get(i);
 610                         String param = methParams.get(i);
 611                         String simpleType = getSimpleType(paramType);
 612                         if (isStructClass(simpleType)) {
 613                         // Check if this is enum type
 614                                 int methodNumId = intDecl.getMethodNumId(method);
 615                                 String helperMethod = methodNumId + "struct" + i;
 616                                 println("int methodIdStruct" + i + " = " + intDecl.getHelperMethodNumId(helperMethod) + ";");
 617                                 println("Class<?> retTypeStruct" + i + " = void.class;");
 618                                 println("Class<?>[] paramClsStruct" + i + " = new Class<?>[] { int.class };");
 619                                 if (isArray(param)) {   // An array
 620                                         println("Object[] paramObjStruct" + i + " = new Object[] { " + getSimpleArrayType(param) + ".length };");
 621                                 } else if (isList(paramType)) { // A list
 622                                         println("Object[] paramObjStruct" + i + " = new Object[] { " + getSimpleArrayType(param) + ".size() };");
 623                                 } else {        // Just one element
 624                                         println("Object[] paramObjStruct" + i + " = new Object[] { new Integer(1) };");
 625                                 }
 626                                 println("rmiCall.remoteCall(objectId, methodIdStruct" + i +
 627                                                 ", retTypeStruct" + i + ", null, paramClsStruct" + i +
 628                                                 ", paramObjStruct" + i + ");\n");
 629                         }
 630                 }
 631         }
 632
 633
 634         /**
 635          * HELPER: isStructPresent() checks presence of struct
 636          */
 637         private boolean isStructPresent(List<String> methParams, List<String> methPrmTypes) {
 638
 639                 // Iterate and find enum declarations
 640                 for (int i = 0; i < methParams.size(); i++) {
 641                         String paramType = methPrmTypes.get(i);
 642                         String param = methParams.get(i);
 643                         String simpleType = getSimpleType(paramType);
 644                         if (isStructClass(simpleType))
 645                                 return true;
 646                 }
 647                 return false;
 648         }
 649
 650
 651         /**
 652          * HELPER: writeLengthStructParamClassJavaStub() writes lengths of parameters
 653          */
 654         private void writeLengthStructParamClassJavaStub(List<String> methParams, List<String> methPrmTypes) {
 655
 656                 // Iterate and find struct declarations - count number of params
 657                 for (int i = 0; i < methParams.size(); i++) {
 658                         String paramType = methPrmTypes.get(i);
 659                         String param = methParams.get(i);
 660                         String simpleType = getGenericType(paramType);
 661                         if (isStructClass(simpleType)) {
 662                                 int members = getNumOfMembers(simpleType);
 663                                 if (isArray(param)) {                   // An array
 664                                         String structLen = param + ".length";
 665                                         print(members + "*" + structLen);
 666                                 } else if (isList(paramType)) { // A list
 667                                         String structLen = param + ".size()";
 668                                         print(members + "*" + structLen);
 669                                 } else
 670                                         print(Integer.toString(members));
 671                         } else
 672                                 print("1");
 673                         if (i != methParams.size() - 1) {
 674                                 print("+");
 675                         }
 676                 }
 677         }
 678
 679
 680         /**
 681          * HELPER: writeStructMembersJavaStub() writes parameters of struct
 682          */
 683         private void writeStructMembersJavaStub(String simpleType, String paramType, String param) {
 684
 685                 // Get the struct declaration for this struct and generate initialization code
 686                 StructDecl structDecl = getStructDecl(simpleType);
 687                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
 688                 List<String> members = structDecl.getMembers(simpleType);
 689                 if (isArray(param)) {                   // An array
 690                         println("for(int i = 0; i < " + param + ".length; i++) {");
 691                 } else if (isList(paramType)) { // A list
 692                         println("for(int i = 0; i < " + param + ".size(); i++) {");
 693                 }
 694                 if (isArrayOrList(param, paramType)) {  // An array or list
 695                         for (int i = 0; i < members.size(); i++) {
 696                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 697                                 println("paramCls[pos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
 698                                 print("paramObj[pos++] = " + param + "[i].");
 699                                 print(getSimpleIdentifier(members.get(i)));
 700                                 println(";");
 701                         }
 702                         println("}");
 703                 } else {        // Just one struct element
 704                         for (int i = 0; i < members.size(); i++) {
 705                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 706                                 println("paramCls[pos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
 707                                 print("paramObj[pos++] = " + param + ".");
 708                                 print(getSimpleIdentifier(members.get(i)));
 709                                 println(";");
 710                         }
 711                 }
 712         }
 713
 714
 715         /**
 716          * HELPER: writeStructParamClassJavaStub() writes parameters if struct is present
 717          */
 718         private void writeStructParamClassJavaStub(List<String> methParams, List<String> methPrmTypes) {
 719
 720                 print("int paramLen = ");
 721                 writeLengthStructParamClassJavaStub(methParams, methPrmTypes);
 722                 println(";");
 723                 println("Object[] paramObj = new Object[paramLen];");
 724                 println("Class<?>[] paramCls = new Class<?>[paramLen];");
 725                 println("int pos = 0;");
 726                 // Iterate again over the parameters
 727                 for (int i = 0; i < methParams.size(); i++) {
 728                         String paramType = methPrmTypes.get(i);
 729                         String param = methParams.get(i);
 730                         String simpleType = getGenericType(paramType);
 731                         if (isStructClass(simpleType)) {
 732                                 writeStructMembersJavaStub(simpleType, paramType, param);
 733                         } else {
 734                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
 735                                 println("paramCls[pos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
 736                                 print("paramObj[pos++] = ");
 737                                 print(getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
 738                                 println(";");
 739                         }
 740                 }
 741
 742         }
 743
 744
 745         /**
 746          * HELPER: writeStructRetMembersJavaStub() writes parameters of struct for return statement
 747          */
 748         private void writeStructRetMembersJavaStub(String simpleType, String retType) {
 749
 750                 // Get the struct declaration for this struct and generate initialization code
 751                 StructDecl structDecl = getStructDecl(simpleType);
 752                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
 753                 List<String> members = structDecl.getMembers(simpleType);
 754                 if (isArrayOrList(retType, retType)) {  // An array or list
 755                         println("for(int i = 0; i < retLen; i++) {");
 756                 }
 757                 if (isArray(retType)) { // An array
 758                         for (int i = 0; i < members.size(); i++) {
 759                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 760                                 print("structRet[i]." + getSimpleIdentifier(members.get(i)));
 761                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") retObj[retObjPos++];");
 762                         }
 763                         println("}");
 764                 } else if (isList(retType)) {   // A list
 765                         println(simpleType + " structRetMem = new " + simpleType + "();");
 766                         for (int i = 0; i < members.size(); i++) {
 767                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 768                                 print("structRetMem." + getSimpleIdentifier(members.get(i)));
 769                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") retObj[retObjPos++];");
 770                         }
 771                         println("structRet.add(structRetMem);");
 772                         println("}");
 773                 } else {        // Just one struct element
 774                         for (int i = 0; i < members.size(); i++) {
 775                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 776                                 print("structRet." + getSimpleIdentifier(members.get(i)));
 777                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") retObj[retObjPos++];");
 778                         }
 779                 }
 780                 println("return structRet;");
 781         }
 782
 783
 784         /**
 785          * HELPER: writeStructReturnJavaStub() writes parameters if struct is present for return statement
 786          */
 787         private void writeStructReturnJavaStub(String simpleType, String retType) {
 788
 789                 // Handle the returned struct!!!
 790                 println("Object retLenObj = rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 791                 // Minimum retLen is 1 if this is a single struct object
 792                 println("int retLen = (int) retLenObj;");
 793                 int numMem = getNumOfMembers(simpleType);
 794                 println("Class<?>[] retCls = new Class<?>[" + numMem + "*retLen];");
 795                 println("Class<?>[] retClsVal = new Class<?>[" + numMem + "*retLen];");
 796                 println("int retPos = 0;");
 797                 // Get the struct declaration for this struct and generate initialization code
 798                 StructDecl structDecl = getStructDecl(simpleType);
 799                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
 800                 List<String> members = structDecl.getMembers(simpleType);
 801                 if (isArrayOrList(retType, retType)) {  // An array or list
 802                         println("for(int i = 0; i < retLen; i++) {");
 803                         for (int i = 0; i < members.size(); i++) {
 804                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 805                                 println("retCls[retPos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
 806                                 println("retClsVal[retPos++] = null;");
 807                         }
 808                         println("}");
 809                 } else {        // Just one struct element
 810                         for (int i = 0; i < members.size(); i++) {
 811                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
 812                                 println("retCls[retPos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
 813                                 println("retClsVal[retPos++] = null;");
 814                         }
 815                 }
 816                 println("Object[] retObj = rmiCall.getStructObjects(retCls, retClsVal);");
 817                 if (isArray(retType)) {                 // An array
 818                         println(simpleType + "[] structRet = new " + simpleType + "[retLen];");
 819                         println("for(int i = 0; i < retLen; i++) {");
 820                         println("structRet[i] = new " + simpleType + "();");
 821                         println("}");
 822                 } else if (isList(retType)) {   // A list
 823                         println("List<" + simpleType + "> structRet = new ArrayList<" + simpleType + ">();");
 824                 } else
 825                         println(simpleType + " structRet = new " + simpleType + "();");
 826                 println("int retObjPos = 0;");
 827                 writeStructRetMembersJavaStub(simpleType, retType);
 828         }
 829
 830
 831         /**
 832          * HELPER: writeStdMethodBodyJavaStub() writes the standard method body in the stub class
 833          */
 834         private void writeStdMethodBodyJavaStub(InterfaceDecl intDecl, List<String> methParams,
 835                         List<String> methPrmTypes, String method) {
 836
 837                 checkAndWriteStructSetupJavaStub(methParams, methPrmTypes, intDecl, method);
 838                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
 839                 String retType = intDecl.getMethodType(method);
 840                 println("Class<?> retType = " + getSimpleType(getStructType(getEnumType(retType))) + ".class;");
 841                 checkAndWriteEnumTypeJavaStub(methParams, methPrmTypes);
 842                 // Generate array of parameter types
 843                 if (isStructPresent(methParams, methPrmTypes)) {
 844                         writeStructParamClassJavaStub(methParams, methPrmTypes);
 845                 } else {
 846                         print("Class<?>[] paramCls = new Class<?>[] { ");
 847                         for (int i = 0; i < methParams.size(); i++) {
 848                                 String paramType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
 849                                 print(getSimpleType(getEnumType(paramType)) + ".class");
 850                                 // Check if this is the last element (don't print a comma)
 851                                 if (i != methParams.size() - 1) {
 852                                         print(", ");
 853                                 }
 854                         }
 855                         println(" };");
 856                         // Generate array of parameter objects
 857                         print("Object[] paramObj = new Object[] { ");
 858                         for (int i = 0; i < methParams.size(); i++) {
 859                                 print(getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
 860                                 // Check if this is the last element (don't print a comma)
 861                                 if (i != methParams.size() - 1) {
 862                                         print(", ");
 863                                 }
 864                         }
 865                         println(" };");
 866                 }
 867                 // Check if this is "void"
 868                 if (retType.equals("void")) {
 869                         println("rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 870                 } else { // We do have a return value
 871                         // Generate array of parameter types
 872                         if (isStructClass(getGenericType(getSimpleArrayType(retType)))) {
 873                                 writeStructReturnJavaStub(getGenericType(getSimpleArrayType(retType)), retType);
 874                         } else {
 875                         // Check if the return value NONPRIMITIVES
 876                                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES) {
 877                                         String[] retGenValType = getTypeOfGeneric(retType);
 878                                         println("Class<?> retGenValType = " + retGenValType[0] + ".class;");
 879                                         println("Object retObj = rmiCall.remoteCall(objectId, methodId, retType, retGenValType, paramCls, paramObj);");
 880                                         println("return (" + retType + ")retObj;");
 881                                 } else if (getParamCategory(retType) == ParamCategory.ENUM) {
 882                                 // This is an enum type
 883                                         println("Object retObj = rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 884                                         checkAndWriteEnumRetTypeJavaStub(retType);
 885                                 } else {
 886                                         println("Object retObj = rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 887                                         println("return (" + retType + ")retObj;");
 888                                 }
 889                         }
 890                 }
 891         }
 892
 893
 894         /**
 895          * HELPER: returnGenericCallbackType() returns the callback type
 896          */
 897         private String returnGenericCallbackType(String paramType) {
 898
 899                 if (getParamCategory(paramType) == ParamCategory.NONPRIMITIVES)
 900                         return getTypeOfGeneric(paramType)[0];
 901                 else
 902                         return paramType;
 903         }
 904
 905
 906         /**
 907          * HELPER: checkCallbackType() checks the callback type
 908          */
 909         private boolean checkCallbackType(String paramType, String callbackType) {
 910
 911                 String prmType = returnGenericCallbackType(paramType);
 912                 return callbackType.equals(prmType);
 913         }
 914
 915
 916         /**
 917          * HELPER: writeCallbackMethodBodyJavaStub() writes the callback method of the stub class
 918          */
 919         private void writeCallbackMethodBodyJavaStub(InterfaceDecl intDecl, List<String> methParams,
 920                         List<String> methPrmTypes, String method, String callbackType) {
 921
 922                 println("try {");
 923                 // Check if this is single object, array, or list of objects
 924                 for (int i = 0; i < methParams.size(); i++) {
 925                         String paramType = methPrmTypes.get(i);
 926                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
 927                                 String param = methParams.get(i);
 928                                 if (isArrayOrList(paramType, param)) {  // Generate loop
 929                                         println("for (" + paramType + " cb : " + getSimpleIdentifier(param) + ") {");
 930                                         println(callbackType + "_CallbackSkeleton skel = new " + callbackType + "_CallbackSkeleton(cb, objIdCnt++);");
 931                                 } else
 932                                         println(callbackType + "_CallbackSkeleton skel = new " + callbackType + "_CallbackSkeleton(" +
 933                                                 getSimpleIdentifier(param) + ", objIdCnt++);");
 934                                 println("listCallbackObj.add(skel);");
 935                                 if (isArrayOrList(paramType, param))
 936                                         println("}");
 937                         }
 938                 }
 939                 println("} catch (Exception ex) {");
 940                 println("ex.printStackTrace();");
 941                 println("throw new Error(\"Exception when generating skeleton objects!\");");
 942                 println("}\n");
 943                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
 944                 String retType = intDecl.getMethodType(method);
 945                 println("Class<?> retType = " + getSimpleType(getEnumType(retType)) + ".class;");
 946                 // Generate array of parameter types
 947                 print("Class<?>[] paramCls = new Class<?>[] { ");
 948                 for (int i = 0; i < methParams.size(); i++) {
 949                         String paramType = methPrmTypes.get(i);
 950                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
 951                                 print("int.class");
 952                         } else { // Generate normal classes if it's not a callback object
 953                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
 954                                 print(getSimpleType(prmType) + ".class");
 955                         }
 956                         if (i != methParams.size() - 1) // Check if this is the last element
 957                                 print(", ");
 958                 }
 959                 println(" };");
 960                 // Generate array of parameter objects
 961                 print("Object[] paramObj = new Object[] { ");
 962                 for (int i = 0; i < methParams.size(); i++) {
 963                         String paramType = methPrmTypes.get(i);
 964                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
 965                                 //if (isArray(methPrmTypes.get(i), methParams.get(i)))
 966                                 if (isArray(methParams.get(i)))
 967                                         print(getSimpleIdentifier(methParams.get(i)) + ".length");
 968                                 else if (isList(methPrmTypes.get(i)))
 969                                         print(getSimpleIdentifier(methParams.get(i)) + ".size()");
 970                                 else
 971                                         print("new Integer(1)");
 972                         } else
 973                                 print(getSimpleIdentifier(methParams.get(i)));
 974                         if (i != methParams.size() - 1)
 975                                 print(", ");
 976                 }
 977                 println(" };");
 978                 // Check if this is "void"
 979                 if (retType.equals("void")) {
 980                         println("rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 981                 } else { // We do have a return value
 982                 // Check if the return value NONPRIMITIVES
 983                         if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES) {
 984                                 String[] retGenValType = getTypeOfGeneric(retType);
 985                                 println("Class<?> retGenValType = " + retGenValType[0] + ".class;");
 986                                 println("Object retObj = rmiCall.remoteCall(objectId, methodId, retType, retGenValType, paramCls, paramObj);");
 987                                 println("return (" + retType + ")retObj;");
 988                         } else {
 989                                 println("Object retObj = rmiCall.remoteCall(objectId, methodId, retType, null, paramCls, paramObj);");
 990                                 println("return (" + retType + ")retObj;");
 991                         }
 992                 }
 993         }
 994
 995
 996         /**
 997          * HELPER: writeMethodJavaStub() writes the methods of the stub class
 998          */
 999         private void writeMethodJavaStub(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
1000
1001                 for (String method : methods) {
1002
1003                         List<String> methParams = intDecl.getMethodParams(method);
1004                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1005                         print("public " + intDecl.getMethodType(method) + " " +
1006                                 intDecl.getMethodId(method) + "(");
1007                         boolean isCallbackMethod = false;
1008                         String callbackType = null;
1009                         for (int i = 0; i < methParams.size(); i++) {
1010
1011                                 String paramType = returnGenericCallbackType(methPrmTypes.get(i));
1012                                 // Check if this has callback object
1013                                 if (callbackClasses.contains(paramType)) {
1014                                         isCallbackMethod = true;
1015                                         callbackType = paramType;
1016                                         // Even if there're 2 callback arguments, we expect them to be of the same interface
1017                                 }
1018                                 print(methPrmTypes.get(i) + " " + methParams.get(i));
1019                                 // Check if this is the last element (don't print a comma)
1020                                 if (i != methParams.size() - 1) {
1021                                         print(", ");
1022                                 }
1023                         }
1024                         println(") {");
1025                         // Now, write the body of stub!
1026                         if (isCallbackMethod)
1027                                 writeCallbackMethodBodyJavaStub(intDecl, methParams, methPrmTypes, method, callbackType);
1028                         else
1029                                 writeStdMethodBodyJavaStub(intDecl, methParams, methPrmTypes, method);
1030                         println("}\n");
1031                         // Write the init callback helper method
1032                         if (isCallbackMethod)
1033                                 writeInitCallbackJavaStub(callbackType, intDecl);
1034                 }
1035         }
1036
1037
1038         /**
1039          * generateJavaStubClasses() generate stubs based on the methods list in Java
1040          */
1041         public void generateJavaStubClasses() throws IOException {
1042
1043                 // Create a new directory
1044                 String path = createDirectories(dir, subdir);
1045                 for (String intface : mapIntfacePTH.keySet()) {
1046
1047                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
1048                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
1049
1050                                 // Open a new file to write into
1051                                 String newIntface = intMeth.getKey();
1052                                 String newStubClass = newIntface + "_Stub";
1053                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".java");
1054                                 pw = new PrintWriter(new BufferedWriter(fw));
1055                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
1056                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
1057                                 // Pass in set of methods and get import classes
1058                                 Set<String> methods = intMeth.getValue();
1059                                 Set<String> importClasses = getImportClasses(methods, intDecl);
1060                                 List<String> stdImportClasses = getStandardJavaImportClasses();
1061                                 List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
1062                                 printImportStatements(allImportClasses); println("");
1063                                 // Find out if there are callback objects
1064                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
1065                                 boolean callbackExist = !callbackClasses.isEmpty();
1066                                 // Write class header
1067                                 println("public class " + newStubClass + " implements " + newIntface + " {\n");
1068                                 // Write properties
1069                                 writePropertiesJavaStub(intface, newIntface, callbackExist, callbackClasses);
1070                                 // Write constructor
1071                                 writeConstructorJavaStub(intface, newStubClass, callbackExist, callbackClasses);
1072                                 // Write methods
1073                                 writeMethodJavaStub(intMeth.getValue(), intDecl, callbackClasses);
1074                                 println("}");
1075                                 pw.close();
1076                                 System.out.println("IoTCompiler: Generated stub class " + newStubClass + ".java...");
1077                         }
1078                 }
1079         }
1080
1081
1082         /**
1083          * HELPER: writePropertiesJavaCallbackStub() writes the properties of the callback stub class
1084          */
1085         private void writePropertiesJavaCallbackStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
1086
1087                 println("private IoTRMICall rmiCall;");
1088                 println("private String address;");
1089                 println("private int[] ports;\n");
1090                 // Get the object Id
1091                 println("private static int objectId = 0;");
1092                 if (callbackExist) {
1093                 // We assume that each class only has one callback interface for now
1094                         Iterator it = callbackClasses.iterator();
1095                         String callbackType = (String) it.next();
1096                         println("// Callback properties");
1097                         println("private IoTRMIObject rmiObj;");
1098                         println("List<" + callbackType + "> listCallbackObj;");
1099                         println("private static int objIdCnt = 0;");
1100                         // Generate permission stuff for callback stubs
1101                         DeclarationHandler decHandler = mapIntDeclHand.get(callbackType);
1102                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(callbackType);
1103                         writePropertiesJavaPermission(callbackType, intDecl);
1104                 }
1105                 println("\n");
1106         }
1107
1108
1109         /**
1110          * HELPER: writeConstructorJavaCallbackStub() writes the constructor of the callback stub class
1111          */
1112         private void writeConstructorJavaCallbackStub(String intface, String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
1113
1114                 // TODO: If we want callback in callback, then we need to add address and port initializations
1115                 println("public " + newStubClass + "(IoTRMICall _rmiCall, int _objectId) throws Exception {");
1116                 println("objectId = _objectId;");
1117                 println("rmiCall = _rmiCall;");
1118                 if (callbackExist) {
1119                         Iterator it = callbackClasses.iterator();
1120                         String callbackType = (String) it.next();
1121                         writeConstructorJavaPermission(intface);
1122                         println("listCallbackObj = new ArrayList<" + callbackType + ">();");
1123                         println("___initCallBack();");
1124                         println("// TODO: Add address and port initialization here if we want callback in callback!");
1125                 }
1126                 println("}\n");
1127         }
1128
1129
1130         /**
1131          * generateJavaCallbackStubClasses() generate callback stubs based on the methods list in Java
1132          * <p>
1133          * Callback stubs gets the IoTRMICall objects from outside of the class as contructor input
1134          * because all these stubs are populated by the class that takes in this object as a callback
1135          * object. In such a class, we only use one socket, hence one IoTRMICall, for all callback objects.
1136          */
1137         public void generateJavaCallbackStubClasses() throws IOException {
1138
1139                 // Create a new directory
1140                 String path = createDirectories(dir, subdir);
1141                 for (String intface : mapIntfacePTH.keySet()) {
1142
1143                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
1144                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
1145
1146                                 // Open a new file to write into
1147                                 String newIntface = intMeth.getKey();
1148                                 String newStubClass = newIntface + "_CallbackStub";
1149                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".java");
1150                                 pw = new PrintWriter(new BufferedWriter(fw));
1151                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
1152                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
1153                                 // Pass in set of methods and get import classes
1154                                 Set<String> methods = intMeth.getValue();
1155                                 Set<String> importClasses = getImportClasses(methods, intDecl);
1156                                 List<String> stdImportClasses = getStandardJavaImportClasses();
1157                                 List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
1158                                 printImportStatements(allImportClasses); println("");
1159                                 // Find out if there are callback objects
1160                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
1161                                 boolean callbackExist = !callbackClasses.isEmpty();
1162                                 // Write class header
1163                                 println("public class " + newStubClass + " implements " + newIntface + " {\n");
1164                                 // Write properties
1165                                 writePropertiesJavaCallbackStub(intface, newIntface, callbackExist, callbackClasses);
1166                                 // Write constructor
1167                                 writeConstructorJavaCallbackStub(intface, newStubClass, callbackExist, callbackClasses);
1168                                 // Write methods
1169                                 // TODO: perhaps need to generate callback for callback
1170                                 writeMethodJavaStub(intMeth.getValue(), intDecl, callbackClasses);
1171                                 println("}");
1172                                 pw.close();
1173                                 System.out.println("IoTCompiler: Generated callback stub class " + newStubClass + ".java...");
1174                         }
1175                 }
1176         }
1177
1178
1179         /**
1180          * HELPER: writePropertiesJavaSkeleton() writes the properties of the skeleton class
1181          */
1182         private void writePropertiesJavaSkeleton(String intface, boolean callbackExist, InterfaceDecl intDecl) {
1183
1184                 println("private " + intface + " mainObj;");
1185                 //println("private int ports;");
1186                 println("private IoTRMIObject rmiObj;\n");
1187                 // Callback
1188                 if (callbackExist) {
1189                         println("private static int objIdCnt = 0;");
1190                         println("private IoTRMICall rmiCall;");
1191                 }
1192                 writePropertiesJavaPermission(intface, intDecl);
1193                 println("\n");
1194         }
1195
1196
1197         /**
1198          * HELPER: writeConstructorJavaSkeleton() writes the constructor of the skeleton class
1199          */
1200         private void writeConstructorJavaSkeleton(String newSkelClass, String intface) {
1201
1202                 println("public " + newSkelClass + "(" + intface + " _mainObj, int _port) throws Exception {");
1203                 println("mainObj = _mainObj;");
1204                 println("rmiObj = new IoTRMIObject(_port);");
1205                 // Generate permission control initialization
1206                 writeConstructorJavaPermission(intface);
1207                 println("___waitRequestInvokeMethod();");
1208                 println("}\n");
1209         }
1210
1211
1212         /**
1213          * HELPER: writeStdMethodBodyJavaSkeleton() writes the standard method body in the skeleton class
1214          */
1215         private void writeStdMethodBodyJavaSkeleton(List<String> methParams, String methodId, String methodType) {
1216
1217                 if (methodType.equals("void"))
1218                         print("mainObj." + methodId + "(");
1219                 else
1220                         print("return mainObj." + methodId + "(");
1221                 for (int i = 0; i < methParams.size(); i++) {
1222
1223                         print(getSimpleIdentifier(methParams.get(i)));
1224                         // Check if this is the last element (don't print a comma)
1225                         if (i != methParams.size() - 1) {
1226                                 print(", ");
1227                         }
1228                 }
1229                 println(");");
1230         }
1231
1232
1233         /**
1234          * HELPER: writeInitCallbackJavaSkeleton() writes the init callback method for skeleton class
1235          */
1236         private void writeInitCallbackJavaSkeleton(boolean callbackSkeleton) {
1237
1238                 // This is a callback skeleton generation
1239                 if (callbackSkeleton)
1240                         println("public void ___regCB(IoTRMIObject rmiObj) throws IOException {");
1241                 else
1242                         println("public void ___regCB() throws IOException {");
1243                 println("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { int.class, String.class, int.class },");
1244                 println("\tnew Class<?>[] { null, null, null });");
1245                 println("rmiCall = new IoTRMICall((int) paramObj[0], (String) paramObj[1], (int) paramObj[2]);");
1246                 println("}\n");
1247         }
1248
1249
1250         /**
1251          * HELPER: writeMethodJavaSkeleton() writes the method of the skeleton class
1252          */
1253         private void writeMethodJavaSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses,
1254                         boolean callbackSkeleton) {
1255
1256                 for (String method : methods) {
1257
1258                         List<String> methParams = intDecl.getMethodParams(method);
1259                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1260                         String methodId = intDecl.getMethodId(method);
1261                         print("public " + intDecl.getMethodType(method) + " " + methodId + "(");
1262                         boolean isCallbackMethod = false;
1263                         String callbackType = null;
1264                         for (int i = 0; i < methParams.size(); i++) {
1265
1266                                 String origParamType = methPrmTypes.get(i);
1267                                 String paramType = checkAndGetParamClass(origParamType);
1268                                 if (callbackClasses.contains(origParamType)) { // Check if this has callback object
1269                                         isCallbackMethod = true;
1270                                         callbackType = origParamType;
1271                                 }
1272                                 print(paramType + " " + methParams.get(i));
1273                                 // Check if this is the last element (don't print a comma)
1274                                 if (i != methParams.size() - 1) {
1275                                         print(", ");
1276                                 }
1277                         }
1278                         println(") {");
1279                         // Now, write the body of skeleton!
1280                         writeStdMethodBodyJavaSkeleton(methParams, methodId, intDecl.getMethodType(method));
1281                         println("}\n");
1282                         if (isCallbackMethod)
1283                                 writeInitCallbackJavaSkeleton(callbackSkeleton);
1284                 }
1285         }
1286
1287
1288         /**
1289          * HELPER: writeCallbackJavaStubGeneration() writes the callback stub generation part
1290          */
1291         private Map<Integer,String> writeCallbackJavaStubGeneration(List<String> methParams, List<String> methPrmTypes,
1292                         String callbackType) {
1293
1294                 Map<Integer,String> mapStubParam = new HashMap<Integer,String>();
1295                 // Iterate over callback objects
1296                 for (int i = 0; i < methParams.size(); i++) {
1297                         String paramType = methPrmTypes.get(i);
1298                         String param = methParams.get(i);
1299                         //if (callbackType.equals(paramType)) {
1300                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
1301                                 println("try {");
1302                                 String exchParamType = checkAndGetParamClass(paramType);
1303                                 // Print array if this is array or list if this is a list of callback objects
1304                                 if (isArray(param)) {
1305                                         println("int numStubs" + i + " = (int) paramObj[" + i + "];");
1306                                         println(exchParamType + "[] stub" + i + " = new " + exchParamType + "[numStubs" + i + "];");
1307                                 } else if (isList(paramType)) {
1308                                         println("int numStubs" + i + " = (int) paramObj[" + i + "];");
1309                                         println("List<" + exchParamType + "> stub" + i + " = new ArrayList<" + exchParamType + ">();");
1310                                 } else {
1311                                         println(exchParamType + " stub" + i + " = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
1312                                         println("objIdCnt++;");
1313                                 }
1314                         }
1315                         // Generate a loop if needed
1316                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
1317                                 String exchParamType = checkAndGetParamClass(paramType);
1318                                 if (isArray(param)) {
1319                                         println("for (int objId = 0; objId < numStubs" + i + "; objId++) {");
1320                                         println("stub" + i + "[objId] = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
1321                                         println("objIdCnt++;");
1322                                         println("}");
1323                                 } else if (isList(paramType)) {
1324                                         println("for (int objId = 0; objId < numStubs" + i + "; objId++) {");
1325                                         println("stub" + i + ".add(new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt));");
1326                                         println("objIdCnt++;");
1327                                         println("}");
1328                                 }
1329                                 mapStubParam.put(i, "stub" + i);        // List of all stub parameters
1330                         }
1331                 }
1332                 return mapStubParam;
1333         }
1334
1335
1336         /**
1337          * HELPER: checkAndWriteEnumTypeJavaSkeleton() writes the enum type (convert from enum to int)
1338          */
1339         private void checkAndWriteEnumTypeJavaSkeleton(List<String> methParams, List<String> methPrmTypes) {
1340
1341                 // Iterate and find enum declarations
1342                 for (int i = 0; i < methParams.size(); i++) {
1343                         String paramType = methPrmTypes.get(i);
1344                         String param = methParams.get(i);
1345                         String simpleType = getSimpleType(paramType);
1346                         if (isEnumClass(simpleType)) {
1347                         // Check if this is enum type
1348                                 println("int paramInt" + i + "[] = (int[]) paramObj[" + i + "];");
1349                                 println(simpleType + "[] enumVals = " + simpleType + ".values();");
1350                                 if (isArray(param)) {   // An array
1351                                         println("int len" + i + " = paramInt" + i + ".length;");
1352                                         println(simpleType + "[] paramEnum = new " + simpleType + "[len];");
1353                                         println("for (int i = 0; i < len" + i + "; i++) {");
1354                                         println("paramEnum[i] = enumVals[paramInt" + i + "[i]];");
1355                                         println("}");
1356                                 } else if (isList(paramType)) { // A list
1357                                         println("int len" + i + " = paramInt" + i + ".length;");
1358                                         println("List<" + simpleType + "> paramEnum = new ArrayList<" + simpleType + ">();");
1359                                         println("for (int i = 0; i < len" + i + "; i++) {");
1360                                         println("paramEnum.add(enumVals[paramInt" + i + "[i]]);");
1361                                         println("}");
1362                                 } else {        // Just one element
1363                                         println(simpleType + " paramEnum" + i + " = enumVals[paramInt" + i + "[0]];");
1364                                 }
1365                         }
1366                 }
1367         }
1368
1369
1370         /**
1371          * HELPER: checkAndWriteEnumRetTypeJavaSkeleton() writes the enum return type (convert from enum to int)
1372          */
1373         private void checkAndWriteEnumRetTypeJavaSkeleton(String retType, String methodId) {
1374
1375                 // Strips off array "[]" for return type
1376                 String pureType = getSimpleArrayType(getSimpleType(retType));
1377                 // Take the inner type of generic
1378                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
1379                         pureType = getTypeOfGeneric(retType)[0];
1380                 if (isEnumClass(pureType)) {
1381                 // Check if this is enum type
1382                         // Enum decoder
1383                         if (isArray(retType)) {                 // An array
1384                                 print(pureType + "[] retEnum = " + methodId + "(");
1385                         } else if (isList(retType)) {   // A list
1386                                 print("List<" + pureType + "> retEnum = " + methodId + "(");
1387                         } else {        // Just one element
1388                                 print(pureType + " retEnum = " + methodId + "(");
1389                         }
1390                 }
1391         }
1392
1393
1394         /**
1395          * HELPER: checkAndWriteEnumRetConvJavaSkeleton() writes the enum return type (convert from enum to int)
1396          */
1397         private void checkAndWriteEnumRetConvJavaSkeleton(String retType) {
1398
1399                 // Strips off array "[]" for return type
1400                 String pureType = getSimpleArrayType(getSimpleType(retType));
1401                 // Take the inner type of generic
1402                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
1403                         pureType = getTypeOfGeneric(retType)[0];
1404                 if (isEnumClass(pureType)) {
1405                 // Check if this is enum type
1406                         if (isArray(retType)) { // An array
1407                                 println("int retLen = retEnum.length;");
1408                                 println("int[] retEnumVal = new int[retLen];");
1409                                 println("for (int i = 0; i < retLen; i++) {");
1410                                 println("retEnumVal[i] = retEnum[i].ordinal();");
1411                                 println("}");
1412                         } else if (isList(retType)) {   // A list
1413                                 println("int retLen = retEnum.size();");
1414                                 println("List<" + pureType + "> retEnumVal = new ArrayList<" + pureType + ">();");
1415                                 println("for (int i = 0; i < retLen; i++) {");
1416                                 println("retEnumVal.add(retEnum[i].ordinal());");
1417                                 println("}");
1418                         } else {        // Just one element
1419                                 println("int[] retEnumVal = new int[1];");
1420                                 println("retEnumVal[0] = retEnum.ordinal();");
1421                         }
1422                         println("Object retObj = retEnumVal;");
1423                 }
1424         }
1425
1426
1427         /**
1428          * HELPER: writeLengthStructParamClassSkeleton() writes lengths of params
1429          */
1430         private void writeLengthStructParamClassSkeleton(List<String> methParams, List<String> methPrmTypes,
1431                         String method, InterfaceDecl intDecl) {
1432
1433                 // Iterate and find struct declarations - count number of params
1434                 for (int i = 0; i < methParams.size(); i++) {
1435                         String paramType = methPrmTypes.get(i);
1436                         String param = methParams.get(i);
1437                         String simpleType = getGenericType(paramType);
1438                         if (isStructClass(simpleType)) {
1439                                 int members = getNumOfMembers(simpleType);
1440                                 print(Integer.toString(members) + "*");
1441                                 int methodNumId = intDecl.getMethodNumId(method);
1442                                 print("struct" + methodNumId + "Size" + i);
1443                         } else
1444                                 print("1");
1445                         if (i != methParams.size() - 1) {
1446                                 print("+");
1447                         }
1448                 }
1449         }
1450
1451
1452         /**
1453          * HELPER: writeStructMembersJavaSkeleton() writes member parameters of struct
1454          */
1455         private void writeStructMembersJavaSkeleton(String simpleType, String paramType,
1456                         String param, String method, InterfaceDecl intDecl, int iVar) {
1457
1458                 // Get the struct declaration for this struct and generate initialization code
1459                 StructDecl structDecl = getStructDecl(simpleType);
1460                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
1461                 List<String> members = structDecl.getMembers(simpleType);
1462                 if (isArrayOrList(param, paramType)) {  // An array or list
1463                         int methodNumId = intDecl.getMethodNumId(method);
1464                         String counter = "struct" + methodNumId + "Size" + iVar;
1465                         println("for(int i = 0; i < " + counter + "; i++) {");
1466                 }
1467                 println("int pos = 0;");
1468                 if (isArrayOrList(param, paramType)) {  // An array or list
1469                         println("for(int i = 0; i < retLen; i++) {");
1470                         for (int i = 0; i < members.size(); i++) {
1471                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
1472                                 println("paramCls[pos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
1473                                 println("paramClsGen[pos++] = null;");
1474                         }
1475                         println("}");
1476                 } else {        // Just one struct element
1477                         for (int i = 0; i < members.size(); i++) {
1478                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
1479                                 println("paramCls[pos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
1480                                 println("paramClsGen[pos++] = null;");
1481                         }
1482                 }
1483         }
1484
1485
1486         /**
1487          * HELPER: writeStructMembersInitJavaSkeleton() writes member parameters initialization of struct
1488          */
1489         private void writeStructMembersInitJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1490                         List<String> methPrmTypes, String method) {
1491
1492                 for (int i = 0; i < methParams.size(); i++) {
1493                         String paramType = methPrmTypes.get(i);
1494                         String param = methParams.get(i);
1495                         String simpleType = getGenericType(paramType);
1496                         if (isStructClass(simpleType)) {
1497                                 int methodNumId = intDecl.getMethodNumId(method);
1498                                 String counter = "struct" + methodNumId + "Size" + i;
1499                                 // Declaration
1500                                 if (isArray(param)) {                   // An array
1501                                         println(simpleType + "[] paramStruct" + i + " = new " + simpleType + "[" + counter + "];");
1502                                         println("for(int i = 0; i < " + counter + "; i++) {");
1503                                         println("paramStruct" + i + "[i] = new " + simpleType + "();");
1504                                         println("}");
1505                                 } else if (isList(paramType)) { // A list
1506                                         println("List<" + simpleType + "> paramStruct" + i + " = new ArrayList<" + simpleType + ">();");
1507                                 } else
1508                                         println(simpleType + " paramStruct" + i + " = new " + simpleType + "();");
1509                                 println("int objPos = 0;");
1510                                 // Initialize members
1511                                 StructDecl structDecl = getStructDecl(simpleType);
1512                                 List<String> members = structDecl.getMembers(simpleType);
1513                                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
1514                                 if (isArrayOrList(param, paramType)) {  // An array or list
1515                                         println("for(int i = 0; i < " + counter + "; i++) {");
1516                                 }
1517                                 if (isArray(param)) {   // An array
1518                                         for (int j = 0; j < members.size(); j++) {
1519                                                 String prmType = checkAndGetArray(memTypes.get(j), members.get(j));
1520                                                 print("paramStruct" + i + "[i]." + getSimpleIdentifier(members.get(j)));
1521                                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") paramObj[objPos++];");
1522                                         }
1523                                         println("}");
1524                                 } else if (isList(paramType)) { // A list
1525                                         println(simpleType + " paramStructMem = new " + simpleType + "();");
1526                                         for (int j = 0; j < members.size(); j++) {
1527                                                 String prmType = checkAndGetArray(memTypes.get(j), members.get(j));
1528                                                 print("paramStructMem." + getSimpleIdentifier(members.get(j)));
1529                                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") paramObj[objPos++];");
1530                                         }
1531                                         println("paramStruct" + i + ".add(paramStructMem);");
1532                                         println("}");
1533                                 } else {        // Just one struct element
1534                                         for (int j = 0; j < members.size(); j++) {
1535                                                 String prmType = checkAndGetArray(memTypes.get(j), members.get(j));
1536                                                 print("paramStruct" + i + "." + getSimpleIdentifier(members.get(j)));
1537                                                 println(" = (" + getSimpleType(getEnumType(prmType)) + ") paramObj[objPos++];");
1538                                         }
1539                                 }
1540                         } else {
1541                                 // Take offsets of parameters
1542                                 println("int offset" + i +" = objPos;");
1543                         }
1544                 }
1545         }
1546
1547
1548         /**
1549          * HELPER: writeStructReturnJavaSkeleton() writes struct for return statement
1550          */
1551         private void writeStructReturnJavaSkeleton(String simpleType, String retType) {
1552
1553                 // Minimum retLen is 1 if this is a single struct object
1554                 if (isArray(retType))
1555                         println("int retLen = retStruct.length;");
1556                 else if (isList(retType))
1557                         println("int retLen = retStruct.size();");
1558                 else    // Just single struct object
1559                         println("int retLen = 1;");
1560                 println("Object retLenObj = retLen;");
1561                 println("rmiObj.sendReturnObj(retLenObj);");
1562                 int numMem = getNumOfMembers(simpleType);
1563                 println("Class<?>[] retCls = new Class<?>[" + numMem + "*retLen];");
1564                 println("Object[] retObj = new Object[" + numMem + "*retLen];");
1565                 println("int retPos = 0;");
1566                 // Get the struct declaration for this struct and generate initialization code
1567                 StructDecl structDecl = getStructDecl(simpleType);
1568                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
1569                 List<String> members = structDecl.getMembers(simpleType);
1570                 if (isArrayOrList(retType, retType)) {  // An array or list
1571                         println("for(int i = 0; i < retLen; i++) {");
1572                         for (int i = 0; i < members.size(); i++) {
1573                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
1574                                 println("retCls[retPos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
1575                                 print("retObj[retPos++] = retStruct[i].");
1576                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
1577                                 println(";");
1578                         }
1579                         println("}");
1580                 } else {        // Just one struct element
1581                         for (int i = 0; i < members.size(); i++) {
1582                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
1583                                 println("retCls[retPos] = " + getSimpleType(getEnumType(prmType)) + ".class;");
1584                                 print("retObj[retPos++] = retStruct.");
1585                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
1586                                 println(";");
1587                         }
1588                 }
1589
1590         }
1591
1592
1593         /**
1594          * HELPER: writeMethodHelperReturnJavaSkeleton() writes return statement part in skeleton
1595          */
1596         private void writeMethodHelperReturnJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1597                         List<String> methPrmTypes, String method, boolean isCallbackMethod, String callbackType,
1598                         boolean isStructMethod) {
1599
1600                 checkAndWriteEnumTypeJavaSkeleton(methParams, methPrmTypes);
1601                 Map<Integer,String> mapStubParam = null;
1602                 if (isCallbackMethod)
1603                         mapStubParam = writeCallbackJavaStubGeneration(methParams, methPrmTypes, callbackType);
1604                 // Check if this is "void"
1605                 String retType = intDecl.getMethodType(method);
1606                 if (retType.equals("void")) {
1607                         print(intDecl.getMethodId(method) + "(");
1608                 } else if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) {   // Enum type
1609                         checkAndWriteEnumRetTypeJavaSkeleton(retType, intDecl.getMethodId(method));
1610                 } else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) { // Struct type
1611                         print(retType + " retStruct = " + intDecl.getMethodId(method) + "(");
1612                 } else { // We do have a return value
1613                         print("Object retObj = " + intDecl.getMethodId(method) + "(");
1614                 }
1615                 for (int i = 0; i < methParams.size(); i++) {
1616
1617                         if (isCallbackMethod) {
1618                                 print(mapStubParam.get(i));     // Get the callback parameter
1619                         } else if (isEnumClass(getSimpleType(methPrmTypes.get(i)))) { // Enum class
1620                                 print(getEnumParam(methPrmTypes.get(i), methParams.get(i), i));
1621                         } else if (isStructClass(getSimpleType(methPrmTypes.get(i)))) {
1622                                 print("paramStruct" + i);
1623                         } else {
1624                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1625                                 if (isStructMethod)
1626                                         print("(" + prmType + ") paramObj[offset" + i + "]");
1627                                 else
1628                                         print("(" + prmType + ") paramObj[" + i + "]");
1629                         }
1630                         if (i != methParams.size() - 1)
1631                                 print(", ");
1632                 }
1633                 println(");");
1634                 if (!retType.equals("void")) {
1635                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) { // Enum type
1636                                 checkAndWriteEnumRetConvJavaSkeleton(retType);
1637                                 println("rmiObj.sendReturnObj(retObj);");
1638                         } else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) { // Struct type
1639                                 writeStructReturnJavaSkeleton(getSimpleArrayType(getSimpleType(retType)), retType);
1640                                 println("rmiObj.sendReturnObj(retCls, retObj);");
1641                         } else
1642                                 println("rmiObj.sendReturnObj(retObj);");
1643                 }
1644                 if (isCallbackMethod) { // Catch exception if this is callback
1645                         println("} catch(Exception ex) {");
1646                         println("ex.printStackTrace();");
1647                         println("throw new Error(\"Exception from callback object instantiation!\");");
1648                         println("}");
1649                 }
1650         }
1651
1652
1653         /**
1654          * HELPER: writeMethodHelperStructJavaSkeleton() writes the struct in skeleton
1655          */
1656         private void writeMethodHelperStructJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1657                         List<String> methPrmTypes, String method, Set<String> callbackClasses) {
1658
1659                 // Generate array of parameter objects
1660                 boolean isCallbackMethod = false;
1661                 String callbackType = null;
1662                 print("int paramLen = ");
1663                 writeLengthStructParamClassSkeleton(methParams, methPrmTypes, method, intDecl);
1664                 println(";");
1665                 println("Class<?>[] paramCls = new Class<?>[paramLen];");
1666                 println("Class<?>[] paramClsGen = new Class<?>[paramLen];");
1667                 // Iterate again over the parameters
1668                 for (int i = 0; i < methParams.size(); i++) {
1669                         String paramType = methPrmTypes.get(i);
1670                         String param = methParams.get(i);
1671                         String simpleType = getGenericType(paramType);
1672                         if (isStructClass(simpleType)) {
1673                                 writeStructMembersJavaSkeleton(simpleType, paramType, param, method, intDecl, i);
1674                         } else {
1675                                 String prmType = returnGenericCallbackType(methPrmTypes.get(i));
1676                                 if (callbackClasses.contains(prmType)) {
1677                                         isCallbackMethod = true;
1678                                         callbackType = prmType;
1679                                         println("paramCls[pos] = int.class;");
1680                                         println("paramClsGen[pos++] = null;");
1681                                 } else {        // Generate normal classes if it's not a callback object
1682                                         String paramTypeOth = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1683                                         println("paramCls[pos] = " + getSimpleType(getEnumType(paramTypeOth)) + ".class;");
1684                                         print("paramClsGen[pos++] = ");
1685                                         String prmTypeOth = methPrmTypes.get(i);
1686                                         if (getParamCategory(prmTypeOth) == ParamCategory.NONPRIMITIVES)
1687                                                 println(getTypeOfGeneric(prmType)[0] + ".class;");
1688                                         else
1689                                                 println("null;");
1690                                 }
1691                         }
1692                 }
1693                 println("Object[] paramObj = rmiObj.getMethodParams(paramCls, paramClsGen);");
1694                 writeStructMembersInitJavaSkeleton(intDecl, methParams, methPrmTypes, method);
1695                 // Write the return value part
1696                 writeMethodHelperReturnJavaSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod, callbackType, true);
1697         }
1698
1699
1700         /**
1701          * HELPER: writeStdMethodHelperBodyJavaSkeleton() writes the standard method body helper in the skeleton class
1702          */
1703         private void writeStdMethodHelperBodyJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1704                         List<String> methPrmTypes, String method, Set<String> callbackClasses) {
1705
1706                 // Generate array of parameter objects
1707                 boolean isCallbackMethod = false;
1708                 String callbackType = null;
1709                 print("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { ");
1710                 for (int i = 0; i < methParams.size(); i++) {
1711
1712                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
1713                         if (callbackClasses.contains(paramType)) {
1714                                 isCallbackMethod = true;
1715                                 callbackType = paramType;
1716                                 print("int.class");
1717                         } else {        // Generate normal classes if it's not a callback object
1718                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1719                                 print(getSimpleType(getEnumType(prmType)) + ".class");
1720                         }
1721                         if (i != methParams.size() - 1)
1722                                 print(", ");
1723                 }
1724                 println(" }, ");
1725                 // Generate generic class if it's a generic type.. null otherwise
1726                 print("new Class<?>[] { ");
1727                 for (int i = 0; i < methParams.size(); i++) {
1728                         String prmType = methPrmTypes.get(i);
1729                         if (getParamCategory(prmType) == ParamCategory.NONPRIMITIVES)
1730                                 print(getTypeOfGeneric(prmType)[0] + ".class");
1731                         else
1732                                 print("null");
1733                         if (i != methParams.size() - 1)
1734                                 print(", ");
1735                 }
1736                 println(" });");
1737                 // Write the return value part
1738                 writeMethodHelperReturnJavaSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod, callbackType, false);
1739         }
1740
1741
1742         /**
1743          * HELPER: writeMethodHelperJavaSkeleton() writes the method helper of the skeleton class
1744          */
1745         private void writeMethodHelperJavaSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
1746
1747                 // Use this set to handle two same methodIds
1748                 Set<String> uniqueMethodIds = new HashSet<String>();
1749                 for (String method : methods) {
1750
1751                         List<String> methParams = intDecl.getMethodParams(method);
1752                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1753                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
1754                                 String methodId = intDecl.getMethodId(method);
1755                                 print("public void ___");
1756                                 String helperMethod = methodId;
1757                                 if (uniqueMethodIds.contains(methodId))
1758                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
1759                                 else
1760                                         uniqueMethodIds.add(methodId);
1761                                 String retType = intDecl.getMethodType(method);
1762                                 print(helperMethod + "(");
1763                                 boolean begin = true;
1764                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
1765                                         String paramType = methPrmTypes.get(i);
1766                                         String param = methParams.get(i);
1767                                         String simpleType = getSimpleType(paramType);
1768                                         if (isStructClass(simpleType)) {
1769                                                 if (!begin) {   // Generate comma for not the beginning variable
1770                                                         print(", "); begin = false;
1771                                                 }
1772                                                 int methodNumId = intDecl.getMethodNumId(method);
1773                                                 print("int struct" + methodNumId + "Size" + i);
1774                                         }
1775                                 }
1776                                 // Check if this is "void"
1777                                 if (retType.equals("void"))
1778                                         println(") {");
1779                                 else
1780                                         println(") throws IOException {");
1781                                 writeMethodHelperStructJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
1782                                 println("}\n");
1783                         } else {
1784                                 String methodId = intDecl.getMethodId(method);
1785                                 print("public void ___");
1786                                 String helperMethod = methodId;
1787                                 if (uniqueMethodIds.contains(methodId))
1788                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
1789                                 else
1790                                         uniqueMethodIds.add(methodId);
1791                                 // Check if this is "void"
1792                                 String retType = intDecl.getMethodType(method);
1793                                 if (retType.equals("void"))
1794                                         println(helperMethod + "() {");
1795                                 else
1796                                         println(helperMethod + "() throws IOException {");
1797                                 // Now, write the helper body of skeleton!
1798                                 writeStdMethodHelperBodyJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
1799                                 println("}\n");
1800                         }
1801                 }
1802                 // Write method helper for structs
1803                 writeMethodHelperStructSetupJavaSkeleton(methods, intDecl);
1804         }
1805
1806
1807         /**
1808          * HELPER: writeMethodHelperStructSetupJavaSkeleton() writes the method helper of struct setup in skeleton class
1809          */
1810         private void writeMethodHelperStructSetupJavaSkeleton(Collection<String> methods,
1811                         InterfaceDecl intDecl) {
1812
1813                 // Use this set to handle two same methodIds
1814                 for (String method : methods) {
1815
1816                         List<String> methParams = intDecl.getMethodParams(method);
1817                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1818                         // Check for params with structs
1819                         for (int i = 0; i < methParams.size(); i++) {
1820                                 String paramType = methPrmTypes.get(i);
1821                                 String param = methParams.get(i);
1822                                 String simpleType = getSimpleType(paramType);
1823                                 if (isStructClass(simpleType)) {
1824                                         int methodNumId = intDecl.getMethodNumId(method);
1825                                         print("public int ___");
1826                                         String helperMethod = methodNumId + "struct" + i;
1827                                         println(helperMethod + "() {");
1828                                         // Now, write the helper body of skeleton!
1829                                         println("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { int.class }, new Class<?>[] { null });");
1830                                         println("return (int) paramObj[0];");
1831                                         println("}\n");
1832                                 }
1833                         }
1834                 }
1835         }
1836
1837
1838         /**
1839          * HELPER: writeMethodHelperStructSetupJavaCallbackSkeleton() writes the method helper of struct setup in callback skeleton class
1840          */
1841         private void writeMethodHelperStructSetupJavaCallbackSkeleton(Collection<String> methods,
1842                         InterfaceDecl intDecl) {
1843
1844                 // Use this set to handle two same methodIds
1845                 for (String method : methods) {
1846
1847                         List<String> methParams = intDecl.getMethodParams(method);
1848                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1849                         // Check for params with structs
1850                         for (int i = 0; i < methParams.size(); i++) {
1851                                 String paramType = methPrmTypes.get(i);
1852                                 String param = methParams.get(i);
1853                                 String simpleType = getSimpleType(paramType);
1854                                 if (isStructClass(simpleType)) {
1855                                         int methodNumId = intDecl.getMethodNumId(method);
1856                                         print("public int ___");
1857                                         String helperMethod = methodNumId + "struct" + i;
1858                                         println(helperMethod + "(IoTRMIObject rmiObj) {");
1859                                         // Now, write the helper body of skeleton!
1860                                         println("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { int.class }, new Class<?>[] { null });");
1861                                         println("return (int) paramObj[0];");
1862                                         println("}\n");
1863                                 }
1864                         }
1865                 }
1866         }
1867
1868
1869         /**
1870          * HELPER: writeCountVarStructSkeleton() writes counter variable of struct for skeleton
1871          */
1872         private void writeCountVarStructSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1873
1874                 // Use this set to handle two same methodIds
1875                 for (String method : methods) {
1876
1877                         List<String> methParams = intDecl.getMethodParams(method);
1878                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1879                         // Check for params with structs
1880                         for (int i = 0; i < methParams.size(); i++) {
1881                                 String paramType = methPrmTypes.get(i);
1882                                 String param = methParams.get(i);
1883                                 String simpleType = getSimpleType(paramType);
1884                                 if (isStructClass(simpleType)) {
1885                                         int methodNumId = intDecl.getMethodNumId(method);
1886                                         println("int struct" + methodNumId + "Size" + i + " = 0;");
1887                                 }
1888                         }
1889                 }
1890         }
1891
1892
1893         /**
1894          * HELPER: writeInputCountVarStructSkeleton() writes input counter variable of struct for skeleton
1895          */
1896         private boolean writeInputCountVarStructSkeleton(String method, InterfaceDecl intDecl) {
1897
1898                 List<String> methParams = intDecl.getMethodParams(method);
1899                 List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1900                 boolean structExist = false;
1901                 // Check for params with structs
1902                 for (int i = 0; i < methParams.size(); i++) {
1903                         String paramType = methPrmTypes.get(i);
1904                         String param = methParams.get(i);
1905                         String simpleType = getSimpleType(paramType);
1906                         boolean begin = true;
1907                         if (isStructClass(simpleType)) {
1908                                 structExist = true;
1909                                 if (!begin) {
1910                                         print(", "); begin = false;
1911                                 }
1912                                 int methodNumId = intDecl.getMethodNumId(method);
1913                                 print("struct" + methodNumId + "Size" + i);
1914                         }
1915                 }
1916                 return structExist;
1917         }
1918
1919
1920         /**
1921          * HELPER: writeMethodCallStructSkeleton() writes method call for wait invoke in skeleton
1922          */
1923         private void writeMethodCallStructSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1924
1925                 // Use this set to handle two same methodIds
1926                 for (String method : methods) {
1927
1928                         List<String> methParams = intDecl.getMethodParams(method);
1929                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1930                         // Check for params with structs
1931                         for (int i = 0; i < methParams.size(); i++) {
1932                                 String paramType = methPrmTypes.get(i);
1933                                 String param = methParams.get(i);
1934                                 String simpleType = getSimpleType(paramType);
1935                                 if (isStructClass(simpleType)) {
1936                                         int methodNumId = intDecl.getMethodNumId(method);
1937                                         print("case ");
1938                                         String helperMethod = methodNumId + "struct" + i;
1939                                         String tempVar = "struct" + methodNumId + "Size" + i;
1940                                         print(intDecl.getHelperMethodNumId(helperMethod) + ": ");
1941                                         print(tempVar + " = ___");
1942                                         println(helperMethod + "(); break;");
1943                                 }
1944                         }
1945                 }
1946         }
1947
1948
1949         /**
1950          * HELPER: writeMethodCallStructCallbackSkeleton() writes method call for wait invoke in skeleton
1951          */
1952         private void writeMethodCallStructCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1953
1954                 // Use this set to handle two same methodIds
1955                 for (String method : methods) {
1956
1957                         List<String> methParams = intDecl.getMethodParams(method);
1958                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1959                         // Check for params with structs
1960                         for (int i = 0; i < methParams.size(); i++) {
1961                                 String paramType = methPrmTypes.get(i);
1962                                 String param = methParams.get(i);
1963                                 String simpleType = getSimpleType(paramType);
1964                                 if (isStructClass(simpleType)) {
1965                                         int methodNumId = intDecl.getMethodNumId(method);
1966                                         print("case ");
1967                                         String helperMethod = methodNumId + "struct" + i;
1968                                         String tempVar = "struct" + methodNumId + "Size" + i;
1969                                         print(intDecl.getHelperMethodNumId(helperMethod) + ": ");
1970                                         print(tempVar + " = ___");
1971                                         println(helperMethod + "(rmiObj); break;");
1972                                 }
1973                         }
1974                 }
1975         }
1976
1977
1978         /**
1979          * HELPER: writeJavaMethodPermission() writes permission checks in skeleton
1980          */
1981         private void writeJavaMethodPermission(String intface) {
1982
1983                 // Get all the different stubs
1984                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
1985                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
1986                         String newIntface = intMeth.getKey();
1987                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
1988                         println("if (_objectId == object" + newObjectId + "Id) {");
1989                         println("if (!set" + newObjectId + "Allowed.contains(methodId)) {");
1990                         println("throw new Error(\"Object with object Id: \" + _objectId + \"  is not allowed to access method: \" + methodId);");
1991                         println("}");
1992                         println("}");
1993                         println("else {");
1994                         println("throw new Error(\"Object Id: \" + _objectId + \" not recognized!\");");
1995                         println("}");
1996                 }
1997         }
1998
1999
2000         /**
2001          * HELPER: writeJavaWaitRequestInvokeMethod() writes the main loop of the skeleton class
2002          */
2003         private void writeJavaWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist, String intface) {
2004
2005                 // Use this set to handle two same methodIds
2006                 Set<String> uniqueMethodIds = new HashSet<String>();
2007                 println("private void ___waitRequestInvokeMethod() throws IOException {");
2008                 // Write variables here if we have callbacks or enums or structs
2009                 writeCountVarStructSkeleton(methods, intDecl);
2010                 println("while (true) {");
2011                 println("rmiObj.getMethodBytes();");
2012                 println("int _objectId = rmiObj.getObjectId();");
2013                 println("int methodId = rmiObj.getMethodId();");
2014                 // Generate permission check
2015                 writeJavaMethodPermission(intface);
2016                 println("switch (methodId) {");
2017                 // Print methods and method Ids
2018                 for (String method : methods) {
2019                         String methodId = intDecl.getMethodId(method);
2020                         int methodNumId = intDecl.getMethodNumId(method);
2021                         print("case " + methodNumId + ": ___");
2022                         String helperMethod = methodId;
2023                         if (uniqueMethodIds.contains(methodId))
2024                                 helperMethod = helperMethod + methodNumId;
2025                         else
2026                                 uniqueMethodIds.add(methodId);
2027                         print(helperMethod + "(");
2028                         writeInputCountVarStructSkeleton(method, intDecl);
2029                         println("); break;");
2030                 }
2031                 String method = "___initCallBack()";
2032                 // Print case -9999 (callback handler) if callback exists
2033                 if (callbackExist) {
2034                         int methodId = intDecl.getHelperMethodNumId(method);
2035                         println("case " + methodId + ": ___regCB(); break;");
2036                 }
2037                 writeMethodCallStructSkeleton(methods, intDecl);
2038                 println("default: ");
2039                 println("throw new Error(\"Method Id \" + methodId + \" not recognized!\");");
2040                 println("}");
2041                 println("}");
2042                 println("}\n");
2043         }
2044
2045
2046         /**
2047          * generateJavaSkeletonClass() generate skeletons based on the methods list in Java
2048          */
2049         public void generateJavaSkeletonClass() throws IOException {
2050
2051                 // Create a new directory
2052                 String path = createDirectories(dir, subdir);
2053                 for (String intface : mapIntfacePTH.keySet()) {
2054                         // Open a new file to write into
2055                         String newSkelClass = intface + "_Skeleton";
2056                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".java");
2057                         pw = new PrintWriter(new BufferedWriter(fw));
2058                         // Pass in set of methods and get import classes
2059                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2060                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2061                         List<String> methods = intDecl.getMethods();
2062                         Set<String> importClasses = getImportClasses(methods, intDecl);
2063                         List<String> stdImportClasses = getStandardJavaImportClasses();
2064                         List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
2065                         printImportStatements(allImportClasses);
2066                         // Find out if there are callback objects
2067                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
2068                         boolean callbackExist = !callbackClasses.isEmpty();
2069                         // Write class header
2070                         println("");
2071                         println("public class " + newSkelClass  + " implements " + intface + " {\n");
2072                         // Write properties
2073                         writePropertiesJavaSkeleton(intface, callbackExist, intDecl);
2074                         // Write constructor
2075                         writeConstructorJavaSkeleton(newSkelClass, intface);
2076                         // Write methods
2077                         writeMethodJavaSkeleton(methods, intDecl, callbackClasses, false);
2078                         // Write method helper
2079                         writeMethodHelperJavaSkeleton(methods, intDecl, callbackClasses);
2080                         // Write waitRequestInvokeMethod() - main loop
2081                         writeJavaWaitRequestInvokeMethod(methods, intDecl, callbackExist, intface);
2082                         println("}");
2083                         pw.close();
2084                         System.out.println("IoTCompiler: Generated skeleton class " + newSkelClass + ".java...");
2085                 }
2086         }
2087
2088
2089         /**
2090          * HELPER: writePropertiesJavaCallbackSkeleton() writes the properties of the callback skeleton class
2091          */
2092         private void writePropertiesJavaCallbackSkeleton(String intface, boolean callbackExist) {
2093
2094                 println("private " + intface + " mainObj;");
2095                 // For callback skeletons, this is its own object Id
2096                 println("private static int objectId = 0;");
2097                 // Callback
2098                 if (callbackExist) {
2099                         println("private static int objIdCnt = 0;");
2100                         println("private IoTRMICall rmiCall;");
2101                 }
2102                 println("\n");
2103         }
2104
2105
2106         /**
2107          * HELPER: writeConstructorJavaCallbackSkeleton() writes the constructor of the skeleton class
2108          */
2109         private void writeConstructorJavaCallbackSkeleton(String newSkelClass, String intface) {
2110
2111                 println("public " + newSkelClass + "(" + intface + " _mainObj, int _objectId) throws Exception {");
2112                 println("mainObj = _mainObj;");
2113                 println("objectId = _objectId;");
2114                 println("}\n");
2115         }
2116
2117
2118         /**
2119          * HELPER: writeMethodHelperJavaCallbackSkeleton() writes the method helper of the callback skeleton class
2120          */
2121         private void writeMethodHelperJavaCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
2122
2123                 // Use this set to handle two same methodIds
2124                 Set<String> uniqueMethodIds = new HashSet<String>();
2125                 for (String method : methods) {
2126
2127                         List<String> methParams = intDecl.getMethodParams(method);
2128                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2129                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
2130                                 String methodId = intDecl.getMethodId(method);
2131                                 print("public void ___");
2132                                 String helperMethod = methodId;
2133                                 if (uniqueMethodIds.contains(methodId))
2134                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
2135                                 else
2136                                         uniqueMethodIds.add(methodId);
2137                                 String retType = intDecl.getMethodType(method);
2138                                 print(helperMethod + "(");
2139                                 boolean begin = true;
2140                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
2141                                         String paramType = methPrmTypes.get(i);
2142                                         String param = methParams.get(i);
2143                                         String simpleType = getSimpleType(paramType);
2144                                         if (isStructClass(simpleType)) {
2145                                                 if (!begin) {   // Generate comma for not the beginning variable
2146                                                         print(", "); begin = false;
2147                                                 }
2148                                                 int methodNumId = intDecl.getMethodNumId(method);
2149                                                 print("int struct" + methodNumId + "Size" + i);
2150                                         }
2151                                 }
2152                                 // Check if this is "void"
2153                                 if (retType.equals("void"))
2154                                         println(", IoTRMIObject rmiObj) {");
2155                                 else
2156                                         println(", IoTRMIObject rmiObj) throws IOException {");
2157                                 writeMethodHelperStructJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
2158                                 println("}\n");
2159                         } else {
2160                                 String methodId = intDecl.getMethodId(method);
2161                                 print("public void ___");
2162                                 String helperMethod = methodId;
2163                                 if (uniqueMethodIds.contains(methodId))
2164                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
2165                                 else
2166                                         uniqueMethodIds.add(methodId);
2167                                 // Check if this is "void"
2168                                 String retType = intDecl.getMethodType(method);
2169                                 if (retType.equals("void"))
2170                                         println(helperMethod + "(IoTRMIObject rmiObj) {");
2171                                 else
2172                                         println(helperMethod + "(IoTRMIObject rmiObj) throws IOException {");
2173                                 // Now, write the helper body of skeleton!
2174                                 writeStdMethodHelperBodyJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
2175                                 println("}\n");
2176                         }
2177                 }
2178                 // Write method helper for structs
2179                 writeMethodHelperStructSetupJavaCallbackSkeleton(methods, intDecl);
2180         }
2181
2182
2183         /**
2184          * HELPER: writeJavaCallbackWaitRequestInvokeMethod() writes the request invoke method of the callback skeleton class
2185          */
2186         private void writeJavaCallbackWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist) {
2187
2188                 // Use this set to handle two same methodIds
2189                 Set<String> uniqueMethodIds = new HashSet<String>();
2190                 println("public void invokeMethod(IoTRMIObject rmiObj) throws IOException {");
2191                 // Write variables here if we have callbacks or enums or structs
2192                 writeCountVarStructSkeleton(methods, intDecl);
2193                 // Write variables here if we have callbacks or enums or structs
2194                 println("int methodId = rmiObj.getMethodId();");
2195                 // TODO: code the permission check here!
2196                 println("switch (methodId) {");
2197                 // Print methods and method Ids
2198                 for (String method : methods) {
2199                         String methodId = intDecl.getMethodId(method);
2200                         int methodNumId = intDecl.getMethodNumId(method);
2201                         print("case " + methodNumId + ": ___");
2202                         String helperMethod = methodId;
2203                         if (uniqueMethodIds.contains(methodId))
2204                                 helperMethod = helperMethod + methodNumId;
2205                         else
2206                                 uniqueMethodIds.add(methodId);
2207                         print(helperMethod + "(");
2208                         if (writeInputCountVarStructSkeleton(method, intDecl))
2209                                 println(", rmiObj); break;");
2210                         else
2211                                 println("rmiObj); break;");
2212                 }
2213                 String method = "___initCallBack()";
2214                 // Print case -9999 (callback handler) if callback exists
2215                 if (callbackExist) {
2216                         int methodId = intDecl.getHelperMethodNumId(method);
2217                         println("case " + methodId + ": ___regCB(rmiObj); break;");
2218                 }
2219                 writeMethodCallStructCallbackSkeleton(methods, intDecl);
2220                 println("default: ");
2221                 println("throw new Error(\"Method Id \" + methodId + \" not recognized!\");");
2222                 println("}");
2223                 println("}\n");
2224         }
2225
2226
2227         /**
2228          * generateJavaCallbackSkeletonClass() generate callback skeletons based on the methods list in Java
2229          */
2230         public void generateJavaCallbackSkeletonClass() throws IOException {
2231
2232                 // Create a new directory
2233                 String path = createDirectories(dir, subdir);
2234                 for (String intface : mapIntfacePTH.keySet()) {
2235                         // Open a new file to write into
2236                         String newSkelClass = intface + "_CallbackSkeleton";
2237                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".java");
2238                         pw = new PrintWriter(new BufferedWriter(fw));
2239                         // Pass in set of methods and get import classes
2240                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2241                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2242                         List<String> methods = intDecl.getMethods();
2243                         Set<String> importClasses = getImportClasses(methods, intDecl);
2244                         List<String> stdImportClasses = getStandardJavaImportClasses();
2245                         List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
2246                         printImportStatements(allImportClasses);
2247                         // Find out if there are callback objects
2248                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
2249                         boolean callbackExist = !callbackClasses.isEmpty();
2250                         // Write class header
2251                         println("");
2252                         println("public class " + newSkelClass  + " implements " + intface + " {\n");
2253                         // Write properties
2254                         writePropertiesJavaCallbackSkeleton(intface, callbackExist);
2255                         // Write constructor
2256                         writeConstructorJavaCallbackSkeleton(newSkelClass, intface);
2257                         // Write methods
2258                         writeMethodJavaSkeleton(methods, intDecl, callbackClasses, true);
2259                         // Write method helper
2260                         writeMethodHelperJavaCallbackSkeleton(methods, intDecl, callbackClasses);
2261                         // Write waitRequestInvokeMethod() - main loop
2262                         writeJavaCallbackWaitRequestInvokeMethod(methods, intDecl, callbackExist);
2263                         println("}");
2264                         pw.close();
2265                         System.out.println("IoTCompiler: Generated callback skeleton class " + newSkelClass + ".java...");
2266                 }
2267         }
2268
2269
2270         /**
2271          * HELPER: writeMethodCplusLocalInterface() writes the method of the local interface
2272          */
2273         private void writeMethodCplusLocalInterface(Collection<String> methods, InterfaceDecl intDecl) {
2274
2275                 for (String method : methods) {
2276
2277                         List<String> methParams = intDecl.getMethodParams(method);
2278                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2279                         print("virtual " + checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2280                                 intDecl.getMethodId(method) + "(");
2281                         for (int i = 0; i < methParams.size(); i++) {
2282                                 // Check for params with driver class types and exchange it
2283                                 //              with its remote interface
2284                                 String paramType = checkAndGetParamClass(methPrmTypes.get(i));
2285                                 paramType = checkAndGetCplusType(paramType);
2286                                 // Check for arrays - translate into vector in C++
2287                                 String paramComplete = checkAndGetCplusArray(paramType, methParams.get(i));
2288                                 print(paramComplete);
2289                                 // Check if this is the last element (don't print a comma)
2290                                 if (i != methParams.size() - 1) {
2291                                         print(", ");
2292                                 }
2293                         }
2294                         println(") = 0;");
2295                 }
2296         }
2297
2298
2299         /**
2300          * HELPER: writeMethodCplusInterface() writes the method of the interface
2301          */
2302         private void writeMethodCplusInterface(Collection<String> methods, InterfaceDecl intDecl) {
2303
2304                 for (String method : methods) {
2305
2306                         List<String> methParams = intDecl.getMethodParams(method);
2307                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2308                         print("virtual " + checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2309                                 intDecl.getMethodId(method) + "(");
2310                         for (int i = 0; i < methParams.size(); i++) {
2311                                 // Check for params with driver class types and exchange it
2312                                 //              with its remote interface
2313                                 String paramType = methPrmTypes.get(i);
2314                                 paramType = checkAndGetCplusType(paramType);
2315                                 // Check for arrays - translate into vector in C++
2316                                 String paramComplete = checkAndGetCplusArray(paramType, methParams.get(i));
2317                                 print(paramComplete);
2318                                 // Check if this is the last element (don't print a comma)
2319                                 if (i != methParams.size() - 1) {
2320                                         print(", ");
2321                                 }
2322                         }
2323                         println(") = 0;");
2324                 }
2325         }
2326
2327
2328         /**
2329          * HELPER: generateEnumCplus() writes the enumeration declaration
2330          */
2331         public void generateEnumCplus() throws IOException {
2332
2333                 // Create a new directory
2334                 createDirectory(dir);
2335                 for (String intface : mapIntfacePTH.keySet()) {
2336                         // Get the right StructDecl
2337                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2338                         EnumDecl enumDecl = (EnumDecl) decHandler.getEnumDecl(intface);
2339                         Set<String> enumTypes = enumDecl.getEnumDeclarations();
2340                         // Iterate over enum declarations
2341                         for (String enType : enumTypes) {
2342                                 // Open a new file to write into
2343                                 FileWriter fw = new FileWriter(dir + "/" + enType + ".hpp");
2344                                 pw = new PrintWriter(new BufferedWriter(fw));
2345                                 // Write file headers
2346                                 println("#ifndef _" + enType.toUpperCase() + "_HPP__");
2347                                 println("#define _" + enType.toUpperCase() + "_HPP__");
2348                                 println("enum " + enType + " {");
2349                                 List<String> enumMembers = enumDecl.getMembers(enType);
2350                                 for (int i = 0; i < enumMembers.size(); i++) {
2351
2352                                         String member = enumMembers.get(i);
2353                                         print(member);
2354                                         // Check if this is the last element (don't print a comma)
2355                                         if (i != enumMembers.size() - 1)
2356                                                 println(",");
2357                                         else
2358                                                 println("");
2359                                 }
2360                                 println("};\n");
2361                                 println("#endif");
2362                                 pw.close();
2363                                 System.out.println("IoTCompiler: Generated enum " + enType + ".hpp...");
2364                         }
2365                 }
2366         }
2367
2368
2369         /**
2370          * HELPER: generateStructCplus() writes the struct declaration
2371          */
2372         public void generateStructCplus() throws IOException {
2373
2374                 // Create a new directory
2375                 createDirectory(dir);
2376                 for (String intface : mapIntfacePTH.keySet()) {
2377                         // Get the right StructDecl
2378                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2379                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
2380                         List<String> structTypes = structDecl.getStructTypes();
2381                         // Iterate over enum declarations
2382                         for (String stType : structTypes) {
2383                                 // Open a new file to write into
2384                                 FileWriter fw = new FileWriter(dir + "/" + stType + ".hpp");
2385                                 pw = new PrintWriter(new BufferedWriter(fw));
2386                                 // Write file headers
2387                                 println("#ifndef _" + stType.toUpperCase() + "_HPP__");
2388                                 println("#define _" + stType.toUpperCase() + "_HPP__");
2389                                 println("struct " + stType + " {");
2390                                 List<String> structMemberTypes = structDecl.getMemberTypes(stType);
2391                                 List<String> structMembers = structDecl.getMembers(stType);
2392                                 for (int i = 0; i < structMembers.size(); i++) {
2393
2394                                         String memberType = structMemberTypes.get(i);
2395                                         String member = structMembers.get(i);
2396                                         String structTypeC = checkAndGetCplusType(memberType);
2397                                         String structComplete = checkAndGetCplusArray(structTypeC, member);
2398                                         println(structComplete + ";");
2399                                 }
2400                                 println("};\n");
2401                                 println("#endif");
2402                                 pw.close();
2403                                 System.out.println("IoTCompiler: Generated struct " + stType + ".hpp...");
2404                         }
2405                 }
2406         }
2407
2408
2409         /**
2410          * generateCplusLocalInterfaces() writes the local interfaces and provides type-checking.
2411          * <p>
2412          * It needs to rewrite and exchange USERDEFINED types in input parameters of stub
2413          * and original interfaces, e.g. exchange Camera and CameraWithVideoAndRecording.
2414          * The local interface has to be the input parameter for the stub and the stub
2415          * interface has to be the input parameter for the local class.
2416          */
2417         public void generateCplusLocalInterfaces() throws IOException {
2418
2419                 // Create a new directory
2420                 createDirectory(dir);
2421                 for (String intface : mapIntfacePTH.keySet()) {
2422                         // Open a new file to write into
2423                         FileWriter fw = new FileWriter(dir + "/" + intface + ".hpp");
2424                         pw = new PrintWriter(new BufferedWriter(fw));
2425                         // Write file headers
2426                         println("#ifndef _" + intface.toUpperCase() + "_HPP__");
2427                         println("#define _" + intface.toUpperCase() + "_HPP__");
2428                         println("#include <iostream>");
2429                         // Pass in set of methods and get include classes
2430                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2431                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2432                         List<String> methods = intDecl.getMethods();
2433                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
2434                         printIncludeStatements(includeClasses); println("");
2435                         println("using namespace std;\n");
2436                         //writeStructCplus(structDecl);
2437                         println("class " + intface); println("{");
2438                         println("public:");
2439                         // Write methods
2440                         writeMethodCplusLocalInterface(methods, intDecl);
2441                         println("};");
2442                         println("#endif");
2443                         pw.close();
2444                         System.out.println("IoTCompiler: Generated local interface " + intface + ".hpp...");
2445                 }
2446         }
2447
2448
2449         /**
2450          * generateCPlusInterfaces() generate stub interfaces based on the methods list in C++
2451          * <p>
2452          * For C++ we use virtual classe as interface
2453          */
2454         public void generateCPlusInterfaces() throws IOException {
2455
2456                 // Create a new directory
2457                 String path = createDirectories(dir, subdir);
2458                 for (String intface : mapIntfacePTH.keySet()) {
2459
2460                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
2461                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
2462
2463                                 // Open a new file to write into
2464                                 String newIntface = intMeth.getKey();
2465                                 FileWriter fw = new FileWriter(path + "/" + newIntface + ".hpp");
2466                                 pw = new PrintWriter(new BufferedWriter(fw));
2467                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2468                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2469                                 // Write file headers
2470                                 println("#ifndef _" + newIntface.toUpperCase() + "_HPP__");
2471                                 println("#define _" + newIntface.toUpperCase() + "_HPP__");
2472                                 println("#include <iostream>");
2473                                 // Pass in set of methods and get import classes
2474                                 Set<String> includeClasses = getIncludeClasses(intMeth.getValue(), intDecl, intface, false);
2475                                 List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
2476                                 List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
2477                                 printIncludeStatements(allIncludeClasses); println("");
2478                                 println("using namespace std;\n");
2479                                 println("class " + newIntface);
2480                                 println("{");
2481                                 println("public:");
2482                                 // Write methods
2483                                 writeMethodCplusInterface(intMeth.getValue(), intDecl);
2484                                 println("};");
2485                                 println("#endif");
2486                                 pw.close();
2487                                 System.out.println("IoTCompiler: Generated interface " + newIntface + ".hpp...");
2488                         }
2489                 }
2490         }
2491
2492
2493         /**
2494          * HELPER: writeMethodCplusStub() writes the methods of the stub
2495          */
2496         private void writeMethodCplusStub(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
2497
2498                 for (String method : methods) {
2499
2500                         List<String> methParams = intDecl.getMethodParams(method);
2501                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2502
2503                         //System.out.println("\n\nMethod return type: " + checkAndGetCplusType(intDecl.getMethodType(method)) + "\n\n");
2504
2505                         print(checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2506                                 intDecl.getMethodId(method) + "(");
2507                         boolean isCallbackMethod = false;
2508                         String callbackType = null;
2509                         for (int i = 0; i < methParams.size(); i++) {
2510
2511                                 String paramType = methPrmTypes.get(i);
2512                                 // Check if this has callback object
2513                                 if (callbackClasses.contains(paramType)) {
2514                                         isCallbackMethod = true;
2515                                         callbackType = paramType;
2516                                         // Even if there're 2 callback arguments, we expect them to be of the same interface
2517                                 }
2518                                 String methPrmType = checkAndGetCplusType(methPrmTypes.get(i));
2519                                 String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
2520                                 print(methParamComplete);
2521                                 // Check if this is the last element (don't print a comma)
2522                                 if (i != methParams.size() - 1) {
2523                                         print(", ");
2524                                 }
2525                         }
2526                         println(") { ");
2527                         if (isCallbackMethod)
2528                                 writeCallbackMethodBodyCplusStub(intDecl, methParams, methPrmTypes, method, callbackType);
2529                         else
2530                                 writeStdMethodBodyCplusStub(intDecl, methParams, methPrmTypes, method);
2531                         println("}\n");
2532                         // Write the init callback helper method
2533                         if (isCallbackMethod) {
2534                                 writeInitCallbackCplusStub(callbackType, intDecl);
2535                                 writeInitCallbackSendInfoCplusStub(intDecl);
2536                         }
2537                 }
2538         }
2539
2540
2541         /**
2542          * HELPER: writeCallbackMethodBodyCplusStub() writes the callback method of the stub class
2543          */
2544         private void writeCallbackMethodBodyCplusStub(InterfaceDecl intDecl, List<String> methParams,
2545                         List<String> methPrmTypes, String method, String callbackType) {
2546
2547                 // Check if this is single object, array, or list of objects
2548                 boolean isArrayOrList = false;
2549                 String callbackParam = null;
2550                 for (int i = 0; i < methParams.size(); i++) {
2551
2552                         String paramType = methPrmTypes.get(i);
2553                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2554                                 String param = methParams.get(i);
2555                                 if (isArrayOrList(paramType, param)) {  // Generate loop
2556                                         println("for (" + paramType + "* cb : " + getSimpleIdentifier(param) + ") {");
2557                                         println(callbackType + "_CallbackSkeleton* skel = new " + callbackType + "_CallbackSkeleton(cb, objIdCnt++);");
2558                                         isArrayOrList = true;
2559                                         callbackParam = getSimpleIdentifier(param);
2560                                 } else
2561                                         println(callbackType + "_CallbackSkeleton* skel = new " + callbackType + "_CallbackSkeleton(" +
2562                                                 getSimpleIdentifier(param) + ", objIdCnt++);");
2563                                 println("vecCallbackObj.push_back(skel);");
2564                                 if (isArrayOrList(paramType, param))
2565                                         println("}");
2566                         }
2567                 }
2568                 println("int numParam = " + methParams.size() + ";");
2569                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
2570                 String retType = intDecl.getMethodType(method);
2571                 //String retTypeC = checkAndGetCplusType(retType);
2572                 //println("string retType = \"" + checkAndGetCplusArrayType(getStructType(getEnumType(retTypeC))) + "\";");
2573                 println("string retType = \"" + checkAndGetCplusRetClsType(getStructType(getEnumType(retType))) + "\";");
2574                 // Generate array of parameter types
2575                 print("string paramCls[] = { ");
2576                 for (int i = 0; i < methParams.size(); i++) {
2577                         String paramType = methPrmTypes.get(i);
2578                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2579                                 print("\"int\"");
2580                         } else { // Generate normal classes if it's not a callback object
2581                                 //String paramTypeC = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
2582                                 //String prmType = getSimpleType(getEnumType(paramTypeC));
2583                                 String paramTypeC = checkAndGetCplusArgClsType(methPrmTypes.get(i), methParams.get(i));
2584                                 String prmType = getEnumType(paramTypeC);
2585                                 print("\"" + prmType + "\"");
2586                         }
2587                         if (i != methParams.size() - 1) // Check if this is the last element
2588                                 print(", ");
2589                 }
2590                 println(" };");
2591                 print("int ___paramCB = ");
2592                 if (isArrayOrList)
2593                         println(callbackParam + ".size();");
2594                 else
2595                         println("1;");
2596                 // Generate array of parameter objects
2597                 print("void* paramObj[] = { ");
2598                 for (int i = 0; i < methParams.size(); i++) {
2599                         String paramType = methPrmTypes.get(i);
2600                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2601                                 print("&___paramCB");
2602                         } else
2603                                 print(getSimpleIdentifier(methParams.get(i)));
2604                         if (i != methParams.size() - 1)
2605                                 print(", ");
2606                 }
2607                 println(" };");
2608                 // Check if this is "void"
2609                 if (retType.equals("void")) {
2610                         println("void* retObj = NULL;");
2611                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2612                 } else { // We do have a return value
2613                         if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2614                                 println(checkAndGetCplusType(retType) + " retVal;");
2615                         else
2616                                 println(checkAndGetCplusType(retType) + " retVal = " + generateCplusInitializer(retType) + ";");
2617                         println("void* retObj = &retVal;");
2618                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2619                         println("return retVal;");
2620                 }
2621         }
2622
2623
2624         /**
2625          * HELPER: checkAndWriteEnumTypeCplusStub() writes the enum type (convert from enum to int)
2626          */
2627         private void checkAndWriteEnumTypeCplusStub(List<String> methParams, List<String> methPrmTypes) {
2628
2629                 // Iterate and find enum declarations
2630                 for (int i = 0; i < methParams.size(); i++) {
2631                         String paramType = methPrmTypes.get(i);
2632                         String param = methParams.get(i);
2633                         String simpleType = getSimpleType(paramType);
2634                         if (isEnumClass(simpleType)) {
2635                         // Check if this is enum type
2636                                 if (isArrayOrList(paramType, param)) {  // An array or vector
2637                                         println("int len" + i + " = " + param + ".size();");
2638                                         println("vector<int> paramEnum" + i + "(len);");
2639                                         println("for (int i = 0; i < len" + i + "; i++) {");
2640                                         println("paramEnum" + i + "[i] = (int) " + param + "[i];");
2641                                         println("}");
2642                                 } else {        // Just one element
2643                                         println("vector<int> paramEnum" + i + "(1);");
2644                                         println("paramEnum" + i + "[0] = (int) " + param + ";");
2645                                 }
2646                         }
2647                 }
2648         }
2649
2650
2651         /**
2652          * HELPER: checkAndWriteEnumRetTypeCplusStub() writes the enum return type (convert from enum to int)
2653          */
2654         private void checkAndWriteEnumRetTypeCplusStub(String retType) {
2655
2656                 // Strips off array "[]" for return type
2657                 String pureType = getSimpleArrayType(getSimpleType(retType));
2658                 // Take the inner type of generic
2659                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2660                         pureType = getTypeOfGeneric(retType)[0];
2661                 if (isEnumClass(pureType)) {
2662                 // Check if this is enum type
2663                         println("vector<int> retEnumInt;");
2664                         println("void* retObj = &retEnumInt;");
2665                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2666                         if (isArrayOrList(retType, retType)) {  // An array or vector
2667                                 println("int retLen = retEnumInt.size();");
2668                                 println("vector<" + pureType + "> retVal(retLen);");
2669                                 println("for (int i = 0; i < retLen; i++) {");
2670                                 println("retVal[i] = (" + pureType + ") retEnumInt[i];");
2671                                 println("}");
2672                         } else {        // Just one element
2673                                 println(pureType + " retVal = (" + pureType + ") retEnumInt[0];");
2674                         }
2675                         println("return retVal;");
2676                 }
2677         }
2678
2679
2680         /**
2681          * HELPER: checkAndWriteStructSetupCplusStub() writes the struct type setup
2682          */
2683         private void checkAndWriteStructSetupCplusStub(List<String> methParams, List<String> methPrmTypes,
2684                         InterfaceDecl intDecl, String method) {
2685
2686                 // Iterate and find struct declarations
2687                 for (int i = 0; i < methParams.size(); i++) {
2688                         String paramType = methPrmTypes.get(i);
2689                         String param = methParams.get(i);
2690                         String simpleType = getSimpleType(paramType);
2691                         if (isStructClass(simpleType)) {
2692                         // Check if this is enum type
2693                                 println("int numParam" + i + " = 1;");
2694                                 int methodNumId = intDecl.getMethodNumId(method);
2695                                 String helperMethod = methodNumId + "struct" + i;
2696                                 println("int methodIdStruct" + i + " = " + intDecl.getHelperMethodNumId(helperMethod) + ";");
2697                                 println("string retTypeStruct" + i + " = \"void\";");
2698                                 println("string paramClsStruct" + i + "[] = { \"int\" };");
2699                                 print("int structLen" + i + " = ");
2700                                 if (isArrayOrList(param, paramType)) {  // An array
2701                                         println(getSimpleArrayType(param) + ".size();");
2702                                 } else {        // Just one element
2703                                         println("1;");
2704                                 }
2705                                 println("void* paramObjStruct" + i + "[] = { &structLen" + i + " };");
2706                                 println("void* retStructLen" + i + " = NULL;");
2707                                 println("rmiCall->remoteCall(objectId, methodIdStruct" + i +
2708                                                 ", retTypeStruct" + i + ", paramClsStruct" + i + ", paramObjStruct" + i +
2709                                                 ", numParam" + i + ", retStructLen" + i + ");\n");
2710                         }
2711                 }
2712         }
2713
2714
2715         /**
2716          * HELPER: writeLengthStructParamClassCplusStub() writes lengths of params
2717          */
2718         private void writeLengthStructParamClassCplusStub(List<String> methParams, List<String> methPrmTypes) {
2719
2720                 // Iterate and find struct declarations - count number of params
2721                 for (int i = 0; i < methParams.size(); i++) {
2722                         String paramType = methPrmTypes.get(i);
2723                         String param = methParams.get(i);
2724                         String simpleType = getGenericType(paramType);
2725                         if (isStructClass(simpleType)) {
2726                                 int members = getNumOfMembers(simpleType);
2727                                 if (isArrayOrList(param, paramType)) {                  // An array
2728                                         String structLen = param + ".size()";
2729                                         print(members + "*" + structLen);
2730                                 } else
2731                                         print(Integer.toString(members));
2732                         } else
2733                                 print("1");
2734                         if (i != methParams.size() - 1) {
2735                                 print("+");
2736                         }
2737                 }
2738         }
2739
2740
2741         /**
2742          * HELPER: writeStructMembersCplusStub() writes member parameters of struct
2743          */
2744         private void writeStructMembersCplusStub(String simpleType, String paramType, String param) {
2745
2746                 // Get the struct declaration for this struct and generate initialization code
2747                 StructDecl structDecl = getStructDecl(simpleType);
2748                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2749                 List<String> members = structDecl.getMembers(simpleType);
2750                 if (isArrayOrList(param, paramType)) {  // An array or list
2751                         println("for(int i = 0; i < " + param + ".size(); i++) {");
2752                 }
2753                 if (isArrayOrList(param, paramType)) {  // An array or list
2754                         for (int i = 0; i < members.size(); i++) {
2755                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2756                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2757                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2758                                 print("paramObj[pos++] = &" + param + "[i].");
2759                                 print(getSimpleIdentifier(members.get(i)));
2760                                 println(";");
2761                         }
2762                         println("}");
2763                 } else {        // Just one struct element
2764                         for (int i = 0; i < members.size(); i++) {
2765                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2766                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2767                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2768                                 print("paramObj[pos++] = &" + param + ".");
2769                                 print(getSimpleIdentifier(members.get(i)));
2770                                 println(";");
2771                         }
2772                 }
2773         }
2774
2775
2776         /**
2777          * HELPER: writeStructParamClassCplusStub() writes member parameters of struct
2778          */
2779         private void writeStructParamClassCplusStub(List<String> methParams, List<String> methPrmTypes) {
2780
2781                 print("int numParam = ");
2782                 writeLengthStructParamClassCplusStub(methParams, methPrmTypes);
2783                 println(";");
2784                 println("void* paramObj[numParam];");
2785                 println("string paramCls[numParam];");
2786                 println("int pos = 0;");
2787                 // Iterate again over the parameters
2788                 for (int i = 0; i < methParams.size(); i++) {
2789                         String paramType = methPrmTypes.get(i);
2790                         String param = methParams.get(i);
2791                         String simpleType = getGenericType(paramType);
2792                         if (isStructClass(simpleType)) {
2793                                 writeStructMembersCplusStub(simpleType, paramType, param);
2794                         } else {
2795                                 String prmTypeC = checkAndGetCplusType(methPrmTypes.get(i));
2796                                 String prmType = checkAndGetCplusArrayType(prmTypeC, methParams.get(i));
2797                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2798                                 print("paramObj[pos++] = &");
2799                                 print(getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
2800                                 println(";");
2801                         }
2802                 }
2803
2804         }
2805
2806
2807         /**
2808          * HELPER: writeStructRetMembersCplusStub() writes member parameters of struct for return statement
2809          */
2810         private void writeStructRetMembersCplusStub(String simpleType, String retType) {
2811
2812                 // Get the struct declaration for this struct and generate initialization code
2813                 StructDecl structDecl = getStructDecl(simpleType);
2814                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2815                 List<String> members = structDecl.getMembers(simpleType);
2816                 if (isArrayOrList(retType, retType)) {  // An array or list
2817                         println("for(int i = 0; i < retLen; i++) {");
2818                 }
2819                 if (isArrayOrList(retType, retType)) {  // An array or list
2820                         for (int i = 0; i < members.size(); i++) {
2821                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
2822                                 print("structRet[i]." + getSimpleIdentifier(members.get(i)));
2823                                 println(" = retParam" + i + "[i];");
2824                         }
2825                         println("}");
2826                 } else {        // Just one struct element
2827                         for (int i = 0; i < members.size(); i++) {
2828                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
2829                                 print("structRet." + getSimpleIdentifier(members.get(i)));
2830                                 println(" = retParam" + i + ";");
2831                         }
2832                 }
2833                 println("return structRet;");
2834         }
2835
2836
2837         /**
2838          * HELPER: writeStructReturnCplusStub() writes member parameters of struct for return statement
2839          */
2840         private void writeStructReturnCplusStub(String simpleType, String retType) {
2841
2842                 // Minimum retLen is 1 if this is a single struct object
2843                 println("int retLen = 0;");
2844                 println("void* retLenObj = { &retLen };");
2845                 // Handle the returned struct!!!
2846                 println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retLenObj);");
2847                 int numMem = getNumOfMembers(simpleType);
2848                 println("int numRet = " + numMem + "*retLen;");
2849                 println("string retCls[numRet];");
2850                 println("void* retObj[numRet];");
2851                 StructDecl structDecl = getStructDecl(simpleType);
2852                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2853                 List<String> members = structDecl.getMembers(simpleType);
2854                 // Set up variables
2855                 if (isArrayOrList(retType, retType)) {  // An array or list
2856                         for (int i = 0; i < members.size(); i++) {
2857                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2858                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2859                                 println(getSimpleType(getEnumType(prmType)) + " retParam" + i + "[retLen];");
2860                         }
2861                 } else {        // Just one struct element
2862                         for (int i = 0; i < members.size(); i++) {
2863                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2864                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2865                                 println(getSimpleType(getEnumType(prmType)) + " retParam" + i + ";");
2866                         }
2867                 }
2868                 println("int retPos = 0;");
2869                 // Get the struct declaration for this struct and generate initialization code
2870                 if (isArrayOrList(retType, retType)) {  // An array or list
2871                         println("for(int i = 0; i < retLen; i++) {");
2872                         for (int i = 0; i < members.size(); i++) {
2873                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2874                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2875                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2876                                 println("retObj[retPos++] = &retParam" + i + "[i];");
2877                         }
2878                         println("}");
2879                 } else {        // Just one struct element
2880                         for (int i = 0; i < members.size(); i++) {
2881                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2882                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2883                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2884                                 println("retObj[retPos++] = &retParam" + i + ";");
2885                         }
2886                 }
2887                 println("rmiCall->getStructObjects(retCls, numRet, retObj);");
2888                 if (isArrayOrList(retType, retType)) {  // An array or list
2889                         println("vector<" + simpleType + "> structRet(retLen);");
2890                 } else
2891                         println(simpleType + " structRet;");
2892                 writeStructRetMembersCplusStub(simpleType, retType);
2893         }
2894
2895
2896         /**
2897          * HELPER: writeStdMethodBodyCplusStub() writes the standard method body in the stub class
2898          */
2899         private void writeStdMethodBodyCplusStub(InterfaceDecl intDecl, List<String> methParams,
2900                         List<String> methPrmTypes, String method) {
2901
2902                 checkAndWriteStructSetupCplusStub(methParams, methPrmTypes, intDecl, method);
2903                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
2904                 String retType = intDecl.getMethodType(method);
2905                 //String retTypeC = checkAndGetCplusType(retType);
2906                 //println("string retType = \"" + checkAndGetCplusArrayType(getStructType(getEnumType(retTypeC))) + "\";");
2907                 println("string retType = \"" + checkAndGetCplusRetClsType(getStructType(getEnumType(retType))) + "\";");
2908                 // Generate array of parameter types
2909                 if (isStructPresent(methParams, methPrmTypes)) {
2910                         writeStructParamClassCplusStub(methParams, methPrmTypes);
2911                 } else {
2912                         println("int numParam = " + methParams.size() + ";");
2913                         print("string paramCls[] = { ");
2914                         for (int i = 0; i < methParams.size(); i++) {
2915                                 //String paramTypeC = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
2916                                 //String prmType = getSimpleType(getEnumType(paramTypeC));
2917                                 String paramTypeC = checkAndGetCplusArgClsType(methPrmTypes.get(i), methParams.get(i));
2918                                 String prmType = getEnumType(paramTypeC);
2919                                 print("\"" + prmType + "\"");
2920                                 // Check if this is the last element (don't print a comma)
2921                                 if (i != methParams.size() - 1) {
2922                                         print(", ");
2923                                 }
2924                         }
2925                         println(" };");
2926                         checkAndWriteEnumTypeCplusStub(methParams, methPrmTypes);
2927                         // Generate array of parameter objects
2928                         print("void* paramObj[] = { ");
2929                         for (int i = 0; i < methParams.size(); i++) {
2930                                 print("&" + getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
2931                                 // Check if this is the last element (don't print a comma)
2932                                 if (i != methParams.size() - 1) {
2933                                         print(", ");
2934                                 }
2935                         }
2936                         println(" };");
2937                 }
2938                 // Check if this is "void"
2939                 if (retType.equals("void")) {
2940                         println("void* retObj = NULL;");
2941                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2942                 } else { // We do have a return value
2943                         // Generate array of parameter types
2944                         if (isStructClass(getGenericType(getSimpleArrayType(retType)))) {
2945                                 writeStructReturnCplusStub(getGenericType(getSimpleArrayType(retType)), retType);
2946                         } else {
2947                         // Check if the return value NONPRIMITIVES
2948                                 if (getParamCategory(retType) == ParamCategory.ENUM) {
2949                                         checkAndWriteEnumRetTypeCplusStub(retType);
2950                                 } else {
2951                                         //if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2952                                         if (isArrayOrList(retType,retType))
2953                                                 println(checkAndGetCplusType(retType) + " retVal;");
2954                                         else {
2955                                                 println(checkAndGetCplusType(retType) + " retVal = " + generateCplusInitializer(retType) + ";");
2956                                         }
2957                                         println("void* retObj = &retVal;");
2958                                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2959                                         println("return retVal;");
2960                                 }
2961                         }
2962                 }
2963         }
2964
2965
2966         /**
2967          * HELPER: writePropertiesCplusStub() writes the properties of the stub class
2968          */
2969         private void writePropertiesCplusPermission(String intface) {
2970
2971                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
2972                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
2973                         String newIntface = intMeth.getKey();
2974                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
2975                         println("const static int object" + newObjectId + "Id = " + newObjectId + ";");
2976                         println("const static set<int> set" + newObjectId + "Allowed;");
2977                 }
2978         }
2979
2980         /**
2981          * HELPER: writePropertiesCplusStub() writes the properties of the stub class
2982          */
2983         private void writePropertiesCplusStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
2984
2985                 println("IoTRMICall *rmiCall;");
2986                 //println("IoTRMIObject\t\t\t*rmiObj;");
2987                 println("string address;");
2988                 println("vector<int> ports;\n");
2989                 // Get the object Id
2990                 Integer objId = mapIntfaceObjId.get(intface);
2991                 println("const static int objectId = " + objId + ";");
2992                 mapNewIntfaceObjId.put(newIntface, objId);
2993                 mapIntfaceObjId.put(intface, objId++);
2994                 if (callbackExist) {
2995                 // We assume that each class only has one callback interface for now
2996                         Iterator it = callbackClasses.iterator();
2997                         String callbackType = (String) it.next();
2998                         println("// Callback properties");
2999                         println("IoTRMIObject *rmiObj;");
3000                         println("vector<" + callbackType + "*> vecCallbackObj;");
3001                         println("static int objIdCnt;");
3002                         // Generate permission stuff for callback stubs
3003                         writePropertiesCplusPermission(callbackType);
3004                 }
3005                 println("\n");
3006         }
3007
3008
3009         /**
3010          * HELPER: writeConstructorCplusStub() writes the constructor of the stub class
3011          */
3012         private void writeConstructorCplusStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
3013
3014                 println(newStubClass +
3015                         "(int _port, const char* _address, int _rev, bool* _bResult, vector<int> _ports) {");
3016                 println("address = _address;");
3017                 println("ports = _ports;");
3018                 println("rmiCall = new IoTRMICall(_port, _address, _rev, _bResult);");
3019                 if (callbackExist) {
3020                         println("objIdCnt = 0;");
3021                         Iterator it = callbackClasses.iterator();
3022                         String callbackType = (String) it.next();
3023                         println("thread th1 (&" + newStubClass + "::___initCallBack, this);");
3024                         println("th1.detach();");
3025                         println("___regCB();");
3026                 }
3027                 println("}\n");
3028         }
3029
3030
3031         /**
3032          * HELPER: writeDeconstructorCplusStub() writes the deconstructor of the stub class
3033          */
3034         private void writeDeconstructorCplusStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
3035
3036                 println("~" + newStubClass + "() {");
3037                 println("if (rmiCall != NULL) {");
3038                 println("delete rmiCall;");
3039                 println("rmiCall = NULL;");
3040                 println("}");
3041                 if (callbackExist) {
3042                 // We assume that each class only has one callback interface for now
3043                         println("if (rmiObj != NULL) {");
3044                         println("delete rmiObj;");
3045                         println("rmiObj = NULL;");
3046                         println("}");
3047                         Iterator it = callbackClasses.iterator();
3048                         String callbackType = (String) it.next();
3049                         println("for(" + callbackType + "* cb : vecCallbackObj) {");
3050                         println("delete cb;");
3051                         println("cb = NULL;");
3052                         println("}");
3053                 }
3054                 println("}");
3055                 println("");
3056         }
3057
3058
3059         /**
3060          * HELPER: writeCplusMethodCallbackPermission() writes permission checks in stub for callbacks
3061          */
3062         private void writeCplusMethodCallbackPermission(String intface) {
3063
3064                 println("int methodId = IoTRMIObject::getMethodId(method);");
3065                 // Get all the different stubs
3066                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3067                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3068                         String newIntface = intMeth.getKey();
3069                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
3070                         println("if (set" + newObjectId + "Allowed.find(methodId) == set" + newObjectId + "Allowed.end()) {");
3071                         println("cerr << \"Callback object for " + intface + " is not allowed to access method: \" << methodId;");
3072                         println("exit(-1);");
3073                         println("}");
3074                 }
3075         }
3076
3077
3078         /**
3079          * HELPER: writeInitCallbackCplusStub() writes the initialization of callback
3080          */
3081         private void writeInitCallbackCplusStub(String intface, InterfaceDecl intDecl) {
3082
3083                 println("void ___initCallBack() {");
3084                 println("bool bResult = false;");
3085                 println("rmiObj = new IoTRMIObject(ports[0], &bResult);");
3086                 println("while (true) {");
3087                 println("char* method = rmiObj->getMethodBytes();");
3088                 writeCplusMethodCallbackPermission(intface);
3089                 println("int objId = IoTRMIObject::getObjectId(method);");
3090                 println("if (objId < vecCallbackObj.size()) {   // Check if still within range");
3091                 println(intface + "_CallbackSkeleton* skel = dynamic_cast<" + intface +
3092                         "_CallbackSkeleton*> (vecCallbackObj.at(objId));");
3093                 println("skel->invokeMethod(rmiObj);");
3094                 println("} else {");
3095                 println("cerr << \"Illegal object Id: \" << to_string(objId);");
3096                 // TODO: perhaps need to change this into "throw" to make it cleaner (allow stack unfolding)
3097                 println("exit(-1);");
3098                 println("}");
3099                 println("}");
3100                 println("}\n");
3101         }
3102
3103
3104         /**
3105          * HELPER: writeInitCallbackSendInfoCplusStub() writes the initialization (send info part) of callback
3106          */
3107         private void writeInitCallbackSendInfoCplusStub(InterfaceDecl intDecl) {
3108
3109                 // Generate info sending part
3110                 println("void ___regCB() {");
3111                 println("int numParam = 3;");
3112                 String method = "___initCallBack()";
3113                 println("int methodId = " + intDecl.getHelperMethodNumId(method) + ";");
3114                 println("string retType = \"void\";");
3115                 println("string paramCls[] = { \"int\", \"string\", \"int\" };");
3116                 println("int rev = 0;");
3117                 println("void* paramObj[] = { &ports[0], &address, &rev };");
3118                 println("void* retObj = NULL;");
3119                 println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
3120                 println("}\n");
3121         }
3122
3123
3124         /**
3125          * generateCPlusStubClasses() generate stubs based on the methods list in C++
3126          */
3127         public void generateCPlusStubClasses() throws IOException {
3128
3129                 // Create a new directory
3130                 String path = createDirectories(dir, subdir);
3131                 for (String intface : mapIntfacePTH.keySet()) {
3132
3133                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3134                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3135                                 // Open a new file to write into
3136                                 String newIntface = intMeth.getKey();
3137                                 String newStubClass = newIntface + "_Stub";
3138                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".hpp");
3139                                 pw = new PrintWriter(new BufferedWriter(fw));
3140                                 // Write file headers
3141                                 println("#ifndef _" + newStubClass.toUpperCase() + "_HPP__");
3142                                 println("#define _" + newStubClass.toUpperCase() + "_HPP__");
3143                                 println("#include <iostream>");
3144                                 // Find out if there are callback objects
3145                                 Set<String> methods = intMeth.getValue();
3146                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
3147                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
3148                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
3149                                 boolean callbackExist = !callbackClasses.isEmpty();
3150                                 if (callbackExist)      // Need thread library if this has callback
3151                                         println("#include <thread>");
3152                                 println("#include \"" + newIntface + ".hpp\""); println("");
3153                                 println("using namespace std;"); println("");
3154                                 println("class " + newStubClass + " : public " + newIntface); println("{");
3155                                 println("private:\n");
3156                                 writePropertiesCplusStub(intface, newIntface, callbackExist, callbackClasses);
3157                                 println("public:\n");
3158                                 // Add default constructor and destructor
3159                                 println(newStubClass + "() { }"); println("");
3160                                 writeConstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3161                                 writeDeconstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3162                                 // Write methods
3163                                 writeMethodCplusStub(methods, intDecl, callbackClasses);
3164                                 print("}"); println(";");
3165                                 if (callbackExist)
3166                                         writePermissionInitializationCplus(intface, newStubClass, intDecl);
3167                                 println("#endif");
3168                                 pw.close();
3169                                 System.out.println("IoTCompiler: Generated stub class " + newStubClass + ".hpp...");
3170                         }
3171                 }
3172         }
3173
3174
3175         /**
3176          * HELPER: writePropertiesCplusCallbackStub() writes the properties of the stub class
3177          */
3178         private void writePropertiesCplusCallbackStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
3179
3180                 println("IoTRMICall *rmiCall;");
3181                 // Get the object Id
3182                 println("static int objectId;");
3183                 if (callbackExist) {
3184                 // We assume that each class only has one callback interface for now
3185                         Iterator it = callbackClasses.iterator();
3186                         String callbackType = (String) it.next();
3187                         println("// Callback properties");
3188                         println("IoTRMIObject *rmiObj;");
3189                         println("vector<" + callbackType + "*> vecCallbackObj;");
3190                         println("static int objIdCnt;");
3191                         // TODO: Need to initialize address and ports if we want to have callback-in-callback
3192                         println("string address;");
3193                         println("vector<int> ports;\n");
3194                         writePropertiesCplusPermission(callbackType);
3195                 }
3196                 println("\n");
3197         }
3198
3199
3200         /**
3201          * HELPER: writeConstructorCplusCallbackStub() writes the constructor of the stub class
3202          */
3203         private void writeConstructorCplusCallbackStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
3204
3205                 println(newStubClass + "(IoTRMICall* _rmiCall, int _objectId) {");
3206                 println("objectId = _objectId;");
3207                 println("rmiCall = _rmiCall;");
3208                 if (callbackExist) {
3209                         Iterator it = callbackClasses.iterator();
3210                         String callbackType = (String) it.next();
3211                         println("thread th1 (&" + newStubClass + "::___initCallBack, this);");
3212                         println("th1.detach();");
3213                         println("___regCB();");
3214                 }
3215                 println("}\n");
3216         }
3217
3218
3219         /**
3220          * generateCPlusCallbackStubClasses() generate callback stubs based on the methods list in C++
3221          */
3222         public void generateCPlusCallbackStubClasses() throws IOException {
3223
3224                 // Create a new directory
3225                 String path = createDirectories(dir, subdir);
3226                 for (String intface : mapIntfacePTH.keySet()) {
3227
3228                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3229                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3230                                 // Open a new file to write into
3231                                 String newIntface = intMeth.getKey();
3232                                 String newStubClass = newIntface + "_CallbackStub";
3233                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".hpp");
3234                                 pw = new PrintWriter(new BufferedWriter(fw));
3235                                 // Find out if there are callback objects
3236                                 Set<String> methods = intMeth.getValue();
3237                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
3238                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
3239                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
3240                                 boolean callbackExist = !callbackClasses.isEmpty();
3241                                 // Write file headers
3242                                 println("#ifndef _" + newStubClass.toUpperCase() + "_HPP__");
3243                                 println("#define _" + newStubClass.toUpperCase() + "_HPP__");
3244                                 println("#include <iostream>");
3245                                 if (callbackExist)
3246                                         println("#include <thread>");
3247                                 println("#include \"" + newIntface + ".hpp\""); println("");
3248                                 println("using namespace std;"); println("");
3249                                 println("class " + newStubClass + " : public " + newIntface); println("{");
3250                                 println("private:\n");
3251                                 writePropertiesCplusCallbackStub(intface, newIntface, callbackExist, callbackClasses);
3252                                 println("public:\n");
3253                                 // Add default constructor and destructor
3254                                 println(newStubClass + "() { }"); println("");
3255                                 writeConstructorCplusCallbackStub(newStubClass, callbackExist, callbackClasses);
3256                                 writeDeconstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3257                                 // Write methods
3258                                 writeMethodCplusStub(methods, intDecl, callbackClasses);
3259                                 println("};");
3260                                 if (callbackExist)
3261                                         writePermissionInitializationCplus(intface, newStubClass, intDecl);
3262                                 println("#endif");
3263                                 pw.close();
3264                                 System.out.println("IoTCompiler: Generated callback stub class " + newIntface + ".hpp...");
3265                         }
3266                 }
3267         }
3268
3269
3270         /**
3271          * HELPER: writePropertiesCplusSkeleton() writes the properties of the skeleton class
3272          */
3273         private void writePropertiesCplusSkeleton(String intface, boolean callbackExist, Set<String> callbackClasses) {
3274
3275                 println(intface + " *mainObj;");
3276                 // Callback
3277                 if (callbackExist) {
3278                         Iterator it = callbackClasses.iterator();
3279                         String callbackType = (String) it.next();
3280                         String exchangeType = checkAndGetParamClass(callbackType);
3281                         println("// Callback properties");
3282                         println("static int objIdCnt;");
3283                         println("vector<" + exchangeType + "*> vecCallbackObj;");
3284                         println("IoTRMICall *rmiCall;");
3285                 }
3286                 println("IoTRMIObject *rmiObj;\n");
3287                 // Keep track of object Ids of all stubs registered to this interface
3288                 writePropertiesCplusPermission(intface);
3289                 println("\n");
3290         }
3291
3292
3293         /**
3294          * HELPER: writePermissionInitializationCplus() writes the initialization of permission set
3295          */
3296         private void writePermissionInitializationCplus(String intface, String newSkelClass, InterfaceDecl intDecl) {
3297
3298                 // Keep track of object Ids of all stubs registered to this interface
3299                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3300                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3301                         String newIntface = intMeth.getKey();
3302                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
3303                         print("const set<int> " + newSkelClass + "::set" + newObjectId + "Allowed {");
3304                         Set<String> methodIds = intMeth.getValue();
3305                         int i = 0;
3306                         for (String methodId : methodIds) {
3307                                 int methodNumId = intDecl.getMethodNumId(methodId);
3308                                 print(Integer.toString(methodNumId));
3309                                 // Check if this is the last element (don't print a comma)
3310                                 if (i != methodIds.size() - 1) {
3311                                         print(", ");
3312                                 }
3313                                 i++;
3314                         }
3315                         println(" };");
3316                 }
3317         }
3318
3319
3320         /**
3321          * HELPER: writeConstructorCplusSkeleton() writes the constructor of the skeleton class
3322          */
3323         private void writeConstructorCplusSkeleton(String newSkelClass, String intface, boolean callbackExist) {
3324
3325                 println(newSkelClass + "(" + intface + " *_mainObj, int _port) {");
3326                 println("bool _bResult = false;");
3327                 println("mainObj = _mainObj;");
3328                 println("rmiObj = new IoTRMIObject(_port, &_bResult);");
3329                 // Callback
3330                 if (callbackExist) {
3331                         println("objIdCnt = 0;");
3332                 }
3333                 //println("set0Allowed = Arrays.asList(object0Permission);");
3334                 println("___waitRequestInvokeMethod();");
3335                 println("}\n");
3336         }
3337
3338
3339         /**
3340          * HELPER: writeDeconstructorCplusSkeleton() writes the deconstructor of the skeleton class
3341          */
3342         private void writeDeconstructorCplusSkeleton(String newSkelClass, boolean callbackExist, Set<String> callbackClasses) {
3343
3344                 println("~" + newSkelClass + "() {");
3345                 println("if (rmiObj != NULL) {");
3346                 println("delete rmiObj;");
3347                 println("rmiObj = NULL;");
3348                 println("}");
3349                 if (callbackExist) {
3350                 // We assume that each class only has one callback interface for now
3351                         println("if (rmiCall != NULL) {");
3352                         println("delete rmiCall;");
3353                         println("rmiCall = NULL;");
3354                         println("}");
3355                         Iterator it = callbackClasses.iterator();
3356                         String callbackType = (String) it.next();
3357                         String exchangeType = checkAndGetParamClass(callbackType);
3358                         println("for(" + exchangeType + "* cb : vecCallbackObj) {");
3359                         println("delete cb;");
3360                         println("cb = NULL;");
3361                         println("}");
3362                 }
3363                 println("}");
3364                 println("");
3365         }
3366
3367
3368         /**
3369          * HELPER: writeStdMethodBodyCplusSkeleton() writes the standard method body in the skeleton class
3370          */
3371         private void writeStdMethodBodyCplusSkeleton(List<String> methParams, String methodId, String methodType) {
3372
3373                 if (methodType.equals("void"))
3374                         print("mainObj->" + methodId + "(");
3375                 else
3376                         print("return mainObj->" + methodId + "(");
3377                 for (int i = 0; i < methParams.size(); i++) {
3378
3379                         print(getSimpleIdentifier(methParams.get(i)));
3380                         // Check if this is the last element (don't print a comma)
3381                         if (i != methParams.size() - 1) {
3382                                 print(", ");
3383                         }
3384                 }
3385                 println(");");
3386         }
3387
3388
3389         /**
3390          * HELPER: writeInitCallbackCplusSkeleton() writes the init callback method for skeleton class
3391          */
3392         private void writeInitCallbackCplusSkeleton(boolean callbackSkeleton) {
3393
3394                 // This is a callback skeleton generation
3395                 if (callbackSkeleton)
3396                         println("void ___regCB(IoTRMIObject* rmiObj) {");
3397                 else
3398                         println("void ___regCB() {");
3399                 println("int numParam = 3;");
3400                 println("int param1 = 0;");
3401                 println("string param2 = \"\";");
3402                 println("int param3 = 0;");
3403                 println("void* paramObj[] = { &param1, &param2, &param3 };");
3404                 println("bool bResult = false;");
3405                 println("rmiCall = new IoTRMICall(param1, param2.c_str(), param3, &bResult);");
3406                 println("}\n");
3407         }
3408
3409
3410         /**
3411          * HELPER: writeMethodCplusSkeleton() writes the method of the skeleton class
3412          */
3413         private void writeMethodCplusSkeleton(Collection<String> methods, InterfaceDecl intDecl,
3414                         Set<String> callbackClasses, boolean callbackSkeleton) {
3415
3416                 for (String method : methods) {
3417
3418                         List<String> methParams = intDecl.getMethodParams(method);
3419                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3420                         String methodId = intDecl.getMethodId(method);
3421                         String methodType = checkAndGetCplusType(intDecl.getMethodType(method));
3422                         print(methodType + " " + methodId + "(");
3423                         boolean isCallbackMethod = false;
3424                         String callbackType = null;
3425                         for (int i = 0; i < methParams.size(); i++) {
3426
3427                                 String origParamType = methPrmTypes.get(i);
3428                                 if (callbackClasses.contains(origParamType)) { // Check if this has callback object
3429                                         isCallbackMethod = true;
3430                                         callbackType = origParamType;
3431                                 }
3432                                 String paramType = checkAndGetParamClass(methPrmTypes.get(i));
3433                                 String methPrmType = checkAndGetCplusType(paramType);
3434                                 String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
3435                                 print(methParamComplete);
3436                                 // Check if this is the last element (don't print a comma)
3437                                 if (i != methParams.size() - 1) {
3438                                         print(", ");
3439                                 }
3440                         }
3441                         println(") {");
3442                         // Now, write the body of skeleton!
3443                         writeStdMethodBodyCplusSkeleton(methParams, methodId, intDecl.getMethodType(method));
3444                         println("}\n");
3445                         if (isCallbackMethod)
3446                                 writeInitCallbackCplusSkeleton(callbackSkeleton);
3447                 }
3448         }
3449
3450
3451         /**
3452          * HELPER: writeCallbackCplusNumStubs() writes the numStubs variable
3453          */
3454         private void writeCallbackCplusNumStubs(List<String> methParams, List<String> methPrmTypes, String callbackType) {
3455
3456                 for (int i = 0; i < methParams.size(); i++) {
3457                         String paramType = methPrmTypes.get(i);
3458                         String param = methParams.get(i);
3459                         //if (callbackType.equals(paramType)) {
3460                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
3461                                 String exchParamType = checkAndGetParamClass(paramType);
3462                                 // Print array if this is array or list if this is a list of callback objects
3463                                 println("int numStubs" + i + " = 0;");
3464                         }
3465                 }
3466         }
3467
3468
3469         /**
3470          * HELPER: writeCallbackCplusStubGeneration() writes the callback stub generation part
3471          */
3472         private void writeCallbackCplusStubGeneration(List<String> methParams, List<String> methPrmTypes, String callbackType) {
3473
3474                 // Iterate over callback objects
3475                 for (int i = 0; i < methParams.size(); i++) {
3476                         String paramType = methPrmTypes.get(i);
3477                         String param = methParams.get(i);
3478                         // Generate a loop if needed
3479                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
3480                                 String exchParamType = checkAndGetParamClass(paramType);
3481                                 if (isArrayOrList(paramType, param)) {
3482                                         println("vector<" + exchParamType + "> stub;");
3483                                         println("for (int objId = 0; objId < numStubs" + i + "; objId++) {");
3484                                         println(exchParamType + "* cb" + i + " = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
3485                                         println("stub" + i + ".push_back(cb);");
3486                                         println("vecCallbackObj.push_back(cb);");
3487                                         println("objIdCnt++;");
3488                                         println("}");
3489                                 } else {
3490                                         println(exchParamType + "* stub" + i + " = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
3491                                         println("vecCallbackObj.push_back(stub" + i + ");");
3492                                         println("objIdCnt++;");
3493                                 }
3494                         }
3495                 }
3496         }
3497
3498
3499         /**
3500          * HELPER: checkAndWriteEnumTypeCplusSkeleton() writes the enum type (convert from enum to int)
3501          */
3502         private void checkAndWriteEnumTypeCplusSkeleton(List<String> methParams, List<String> methPrmTypes) {
3503
3504                 // Iterate and find enum declarations
3505                 for (int i = 0; i < methParams.size(); i++) {
3506                         String paramType = methPrmTypes.get(i);
3507                         String param = methParams.get(i);
3508                         String simpleType = getSimpleType(paramType);
3509                         if (isEnumClass(simpleType)) {
3510                         // Check if this is enum type
3511                                 if (isArrayOrList(paramType, param)) {  // An array
3512                                         println("int len" + i + " = paramEnumInt" + i + ".size();");
3513                                         println("vector<" + simpleType + "> paramEnum" + i + "(len" + i + ");");
3514                                         println("for (int i=0; i < len" + i + "; i++) {");
3515                                         println("paramEnum" + i + "[i] = (" + simpleType + ") paramEnumInt" + i + "[i];");
3516                                         println("}");
3517                                 } else {        // Just one element
3518                                         println(simpleType + " paramEnum" + i + ";");
3519                                         println("paramEnum" + i + " = (" + simpleType + ") paramEnumInt" + i + "[0];");
3520                                 }
3521                         }
3522                 }
3523         }
3524
3525
3526         /**
3527          * HELPER: checkAndWriteEnumRetTypeCplusSkeleton() writes the enum return type (convert from enum to int)
3528          */
3529         private void checkAndWriteEnumRetTypeCplusSkeleton(String retType) {
3530
3531                 // Strips off array "[]" for return type
3532                 String pureType = getSimpleArrayType(getSimpleType(retType));
3533                 // Take the inner type of generic
3534                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
3535                         pureType = getTypeOfGeneric(retType)[0];
3536                 if (isEnumClass(pureType)) {
3537                 // Check if this is enum type
3538                         // Enum decoder
3539                         if (isArrayOrList(retType, retType)) {  // An array
3540                                 println("int retLen = retEnum.size();");
3541                                 println("vector<int> retEnumInt(retLen);");
3542                                 println("for (int i=0; i < retLen; i++) {");
3543                                 println("retEnumInt[i] = (int) retEnum[i];");
3544                                 println("}");
3545                         } else {        // Just one element
3546                                 println("vector<int> retEnumInt(1);");
3547                                 println("retEnumInt[0] = (int) retEnum;");
3548                         }
3549                 }
3550         }
3551
3552
3553         /**
3554          * HELPER: writeMethodHelperReturnCplusSkeleton() writes the return statement part in skeleton
3555          */
3556         private void writeMethodInputParameters(List<String> methParams, List<String> methPrmTypes,
3557                         Set<String> callbackClasses, String methodId) {
3558
3559                 print(methodId + "(");
3560                 for (int i = 0; i < methParams.size(); i++) {
3561                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3562                         if (callbackClasses.contains(paramType))
3563                                 print("stub" + i);
3564                         else if (isEnumClass(getSimpleType(paramType))) // Check if this is enum type
3565                                 print("paramEnum" + i);
3566                         else if (isStructClass(getSimpleType(paramType)))       // Struct type
3567                                 print("paramStruct" + i);
3568                         else
3569                                 print(getSimpleIdentifier(methParams.get(i)));
3570                         if (i != methParams.size() - 1) {
3571                                 print(", ");
3572                         }
3573                 }
3574                 println(");");
3575         }
3576
3577
3578         /**
3579          * HELPER: writeMethodHelperReturnCplusSkeleton() writes the return statement part in skeleton
3580          */
3581         private void writeMethodHelperReturnCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3582                         List<String> methPrmTypes, String method, boolean isCallbackMethod, String callbackType,
3583                         String methodId, Set<String> callbackClasses) {
3584
3585                 println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3586                 if (isCallbackMethod)
3587                         writeCallbackCplusStubGeneration(methParams, methPrmTypes, callbackType);
3588                 checkAndWriteEnumTypeCplusSkeleton(methParams, methPrmTypes);
3589                 writeStructMembersInitCplusSkeleton(intDecl, methParams, methPrmTypes, method);
3590                 // Check if this is "void"
3591                 String retType = intDecl.getMethodType(method);
3592                 // Check if this is "void"
3593                 if (retType.equals("void")) {
3594                         writeMethodInputParameters(methParams, methPrmTypes, callbackClasses, methodId);
3595                 } else { // We do have a return value
3596                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) // Enum type
3597                                 print(checkAndGetCplusType(retType) + " retEnum = ");
3598                         else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3599                                 print(checkAndGetCplusType(retType) + " retStruct = ");
3600                         else
3601                                 print(checkAndGetCplusType(retType) + " retVal = ");
3602                         writeMethodInputParameters(methParams, methPrmTypes, callbackClasses, methodId);
3603                         checkAndWriteEnumRetTypeCplusSkeleton(retType);
3604                         if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3605                                 writeStructReturnCplusSkeleton(getSimpleArrayType(getSimpleType(retType)), retType);
3606                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) // Enum type
3607                                 println("void* retObj = &retEnumInt;");
3608                         else
3609                                 if (!isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3610                                         println("void* retObj = &retVal;");
3611                         String retTypeC = checkAndGetCplusType(retType);
3612                         if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3613                                 println("rmiObj->sendReturnObj(retObj, retCls, numRetObj);");
3614                         else
3615                                 println("rmiObj->sendReturnObj(retObj, \"" + checkAndGetCplusRetClsType(getEnumType(retType)) + "\");");
3616                 }
3617         }
3618
3619
3620         /**
3621          * HELPER: writeStdMethodHelperBodyCplusSkeleton() writes the standard method body helper in the skeleton class
3622          */
3623         private void writeStdMethodHelperBodyCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3624                         List<String> methPrmTypes, String method, String methodId, Set<String> callbackClasses) {
3625
3626                 // Generate array of parameter types
3627                 boolean isCallbackMethod = false;
3628                 String callbackType = null;
3629                 print("string paramCls[] = { ");
3630                 for (int i = 0; i < methParams.size(); i++) {
3631                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3632                         if (callbackClasses.contains(paramType)) {
3633                                 isCallbackMethod = true;
3634                                 callbackType = paramType;
3635                                 print("\"int\"");
3636                         } else {        // Generate normal classes if it's not a callback object
3637                                 //String paramTypeC = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
3638                                 //String prmType = getSimpleType(getEnumType(paramTypeC));
3639                                 String paramTypeC = checkAndGetCplusArgClsType(methPrmTypes.get(i), methParams.get(i));
3640                                 String prmType = getEnumType(paramTypeC);
3641                                 print("\"" + prmType + "\"");
3642                         }
3643                         if (i != methParams.size() - 1) {
3644                                 print(", ");
3645                         }
3646                 }
3647                 println(" };");
3648                 println("int numParam = " + methParams.size() + ";");
3649                 if (isCallbackMethod)
3650                         writeCallbackCplusNumStubs(methParams, methPrmTypes, callbackType);
3651                 // Generate parameters
3652                 for (int i = 0; i < methParams.size(); i++) {
3653                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3654                         if (!callbackClasses.contains(paramType)) {
3655                                 String methPrmType = checkAndGetCplusType(methPrmTypes.get(i));
3656                                 if (isEnumClass(getSimpleType(methPrmType))) {  // Check if this is enum type
3657                                         println("vector<int> paramEnumInt" + i + ";");
3658                                 } else {
3659                                         String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
3660                     println(methParamComplete + ";");
3661                                 }
3662                         }
3663                 }
3664                 // Generate array of parameter objects
3665                 print("void* paramObj[] = { ");
3666                 for (int i = 0; i < methParams.size(); i++) {
3667                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3668                         if (callbackClasses.contains(paramType))
3669                                 print("&numStubs" + i);
3670                         else if (isEnumClass(getSimpleType(paramType))) // Check if this is enum type
3671                                 print("&paramEnumInt" + i);
3672                         else
3673                                 print("&" + getSimpleIdentifier(methParams.get(i)));
3674                         if (i != methParams.size() - 1) {
3675                                 print(", ");
3676                         }
3677                 }
3678                 println(" };");
3679                 // Write the return value part
3680                 writeMethodHelperReturnCplusSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod,
3681                         callbackType, methodId, callbackClasses);
3682         }
3683
3684
3685         /**
3686          * HELPER: writeStructMembersCplusSkeleton() writes member parameters of struct
3687          */
3688         private void writeStructMembersCplusSkeleton(String simpleType, String paramType,
3689                         String param, String method, InterfaceDecl intDecl, int iVar) {
3690
3691                 // Get the struct declaration for this struct and generate initialization code
3692                 StructDecl structDecl = getStructDecl(simpleType);
3693                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3694                 List<String> members = structDecl.getMembers(simpleType);
3695                 int methodNumId = intDecl.getMethodNumId(method);
3696                 String counter = "struct" + methodNumId + "Size" + iVar;
3697                 if (isArrayOrList(param, paramType)) {  // An array or list
3698                         println("for(int i = 0; i < " + counter + "; i++) {");
3699                 }
3700                 // Set up variables
3701                 if (isArrayOrList(param, paramType)) {  // An array or list
3702                         for (int i = 0; i < members.size(); i++) {
3703                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3704                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3705                                 println(getSimpleType(getEnumType(prmType)) + " param" + i + "[" + counter + "];");
3706                         }
3707                 } else {        // Just one struct element
3708                         for (int i = 0; i < members.size(); i++) {
3709                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3710                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3711                                 println(getSimpleType(getEnumType(prmType)) + " param" + i + ";");
3712                         }
3713                 }
3714                 println("int pos = 0;");
3715                 if (isArrayOrList(param, paramType)) {  // An array or list
3716                         println("for(int i = 0; i < retLen; i++) {");
3717                         for (int i = 0; i < members.size(); i++) {
3718                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3719                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3720                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3721                                 println("paramObj[pos++] = &param" + i + "[i];");
3722                         }
3723                         println("}");
3724                 } else {        // Just one struct element
3725                         for (int i = 0; i < members.size(); i++) {
3726                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3727                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3728                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3729                                 println("paramObj[pos++] = &param" + i + ";");
3730                         }
3731                 }
3732         }
3733
3734
3735         /**
3736          * HELPER: writeStructMembersInitCplusSkeleton() writes member parameters initialization of struct
3737          */
3738         private void writeStructMembersInitCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3739                         List<String> methPrmTypes, String method) {
3740
3741                 for (int i = 0; i < methParams.size(); i++) {
3742                         String paramType = methPrmTypes.get(i);
3743                         String param = methParams.get(i);
3744                         String simpleType = getGenericType(paramType);
3745                         if (isStructClass(simpleType)) {
3746                                 int methodNumId = intDecl.getMethodNumId(method);
3747                                 String counter = "struct" + methodNumId + "Size" + i;
3748                                 // Declaration
3749                                 if (isArrayOrList(param, paramType)) {  // An array or list
3750                                         println("vector<" + simpleType + "> paramStruct" + i + ";");
3751                                 } else
3752                                         println(simpleType + " paramStruct" + i + ";");
3753                                 // Initialize members
3754                                 StructDecl structDecl = getStructDecl(simpleType);
3755                                 List<String> members = structDecl.getMembers(simpleType);
3756                                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3757                                 if (isArrayOrList(param, paramType)) {  // An array or list
3758                                         println("for(int i = 0; i < " + counter + "; i++) {");
3759                                         for (int j = 0; j < members.size(); j++) {
3760                                                 print("paramStruct" + i + "[i]." + getSimpleIdentifier(members.get(j)));
3761                                                 println(" = param" + j + "[i];");
3762                                         }
3763                                         println("}");
3764                                 } else {        // Just one struct element
3765                                         for (int j = 0; j < members.size(); j++) {
3766                                                 print("paramStruct" + i + "." + getSimpleIdentifier(members.get(j)));
3767                                                 println(" = param" + j + ";");
3768                                         }
3769                                 }
3770                         }
3771                 }
3772         }
3773
3774
3775         /**
3776          * HELPER: writeStructReturnCplusSkeleton() writes parameters of struct for return statement
3777          */
3778         private void writeStructReturnCplusSkeleton(String simpleType, String retType) {
3779
3780                 // Minimum retLen is 1 if this is a single struct object
3781                 if (isArrayOrList(retType, retType))
3782                         println("int retLen = retStruct.size();");
3783                 else    // Just single struct object
3784                         println("int retLen = 1;");
3785                 println("void* retLenObj = &retLen;");
3786                 println("rmiObj->sendReturnObj(retLenObj, \"int\");");
3787                 int numMem = getNumOfMembers(simpleType);
3788                 println("int numRetObj = " + numMem + "*retLen;");
3789                 println("string retCls[numRetObj];");
3790                 println("void* retObj[numRetObj];");
3791                 println("int retPos = 0;");
3792                 // Get the struct declaration for this struct and generate initialization code
3793                 StructDecl structDecl = getStructDecl(simpleType);
3794                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3795                 List<String> members = structDecl.getMembers(simpleType);
3796                 if (isArrayOrList(retType, retType)) {  // An array or list
3797                         println("for(int i = 0; i < retLen; i++) {");
3798                         for (int i = 0; i < members.size(); i++) {
3799                                 String paramTypeC = checkAndGetCplusType(memTypes.get(i));
3800                                 String prmType = checkAndGetCplusArrayType(paramTypeC, members.get(i));
3801                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3802                                 print("retObj[retPos++] = &retStruct[i].");
3803                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
3804                                 println(";");
3805                         }
3806                         println("}");
3807                 } else {        // Just one struct element
3808                         for (int i = 0; i < members.size(); i++) {
3809                                 String paramTypeC = checkAndGetCplusType(memTypes.get(i));
3810                                 String prmType = checkAndGetCplusArrayType(paramTypeC, members.get(i));
3811                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3812                                 print("retObj[retPos++] = &retStruct.");
3813                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
3814                                 println(";");
3815                         }
3816                 }
3817
3818         }
3819
3820
3821         /**
3822          * HELPER: writeMethodHelperStructCplusSkeleton() writes the struct in skeleton
3823          */
3824         private void writeMethodHelperStructCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3825                         List<String> methPrmTypes, String method, String methodId, Set<String> callbackClasses) {
3826
3827                 // Generate array of parameter objects
3828                 boolean isCallbackMethod = false;
3829                 String callbackType = null;
3830                 print("int numParam = ");
3831                 writeLengthStructParamClassSkeleton(methParams, methPrmTypes, method, intDecl);
3832                 println(";");
3833                 println("string paramCls[numParam];");
3834                 println("void* paramObj[numParam];");
3835                 // Iterate again over the parameters
3836                 for (int i = 0; i < methParams.size(); i++) {
3837                         String paramType = methPrmTypes.get(i);
3838                         String param = methParams.get(i);
3839                         String simpleType = getGenericType(paramType);
3840                         if (isStructClass(simpleType)) {
3841                                 writeStructMembersCplusSkeleton(simpleType, paramType, param, method, intDecl, i);
3842                         } else {
3843                                 String prmType = returnGenericCallbackType(methPrmTypes.get(i));
3844                                 if (callbackClasses.contains(prmType)) {
3845                                         isCallbackMethod = true;
3846                                         callbackType = paramType;
3847                                         writeCallbackCplusNumStubs(methParams, methPrmTypes, callbackType);
3848                                         println("paramCls[pos] = \"int\";");
3849                                         println("paramObj[pos++] = &numStubs" + i + ";");
3850                                 } else {        // Generate normal classes if it's not a callback object
3851                                         String paramTypeC = checkAndGetCplusType(methPrmTypes.get(i));
3852                                         String prmTypeC = checkAndGetCplusArrayType(paramTypeC, methParams.get(i));
3853                                         if (isEnumClass(getSimpleType(paramTypeC))) {   // Check if this is enum type
3854                                                 println("vector<int> paramEnumInt" + i + ";");
3855                                         } else {
3856                                                 String methParamComplete = checkAndGetCplusArray(paramTypeC, methParams.get(i));
3857                                                 println(methParamComplete + ";");
3858                                         }
3859                                         println("paramCls[pos] = \"" + getEnumType(prmTypeC) + "\";");
3860                                         if (isEnumClass(getSimpleType(paramType)))      // Check if this is enum type
3861                                                 println("paramObj[pos++] = &paramEnumInt" + i);
3862                                         else
3863                                                 println("paramObj[pos++] = &" + getSimpleIdentifier(methParams.get(i)) + ";");
3864                                 }
3865                         }
3866                 }
3867                 // Write the return value part
3868                 writeMethodHelperReturnCplusSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod,
3869                         callbackType, methodId, callbackClasses);
3870         }
3871
3872
3873         /**
3874          * HELPER: writeMethodHelperCplusSkeleton() writes the method helper of the skeleton class
3875          */
3876         private void writeMethodHelperCplusSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
3877
3878                 // Use this set to handle two same methodIds
3879                 Set<String> uniqueMethodIds = new HashSet<String>();
3880                 for (String method : methods) {
3881
3882                         List<String> methParams = intDecl.getMethodParams(method);
3883                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3884                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
3885                                 String methodId = intDecl.getMethodId(method);
3886                                 print("void ___");
3887                                 String helperMethod = methodId;
3888                                 if (uniqueMethodIds.contains(methodId))
3889                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
3890                                 else
3891                                         uniqueMethodIds.add(methodId);
3892                                 String retType = intDecl.getMethodType(method);
3893                                 print(helperMethod + "(");
3894                                 boolean begin = true;
3895                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
3896                                         String paramType = methPrmTypes.get(i);
3897                                         String param = methParams.get(i);
3898                                         String simpleType = getSimpleType(paramType);
3899                                         if (isStructClass(simpleType)) {
3900                                                 if (!begin) {   // Generate comma for not the beginning variable
3901                                                         print(", "); begin = false;
3902                                                 }
3903                                                 int methodNumId = intDecl.getMethodNumId(method);
3904                                                 print("int struct" + methodNumId + "Size" + i);
3905                                         }
3906                                 }
3907                                 println(") {");
3908                                 writeMethodHelperStructCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
3909                                 println("}\n");
3910                         } else {
3911                                 String methodId = intDecl.getMethodId(method);
3912                                 print("void ___");
3913                                 String helperMethod = methodId;
3914                                 if (uniqueMethodIds.contains(methodId))
3915                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
3916                                 else
3917                                         uniqueMethodIds.add(methodId);
3918                                 // Check if this is "void"
3919                                 String retType = intDecl.getMethodType(method);
3920                                 println(helperMethod + "() {");
3921                                 // Now, write the helper body of skeleton!
3922                                 writeStdMethodHelperBodyCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
3923                                 println("}\n");
3924                         }
3925                 }
3926                 // Write method helper for structs
3927                 writeMethodHelperStructSetupCplusSkeleton(methods, intDecl);
3928         }
3929
3930
3931         /**
3932          * HELPER: writeMethodHelperStructSetupCplusSkeleton() writes the method helper of struct in skeleton class
3933          */
3934         private void writeMethodHelperStructSetupCplusSkeleton(Collection<String> methods,
3935                         InterfaceDecl intDecl) {
3936
3937                 // Use this set to handle two same methodIds
3938                 for (String method : methods) {
3939
3940                         List<String> methParams = intDecl.getMethodParams(method);
3941                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3942                         // Check for params with structs
3943                         for (int i = 0; i < methParams.size(); i++) {
3944                                 String paramType = methPrmTypes.get(i);
3945                                 String param = methParams.get(i);
3946                                 String simpleType = getSimpleType(paramType);
3947                                 if (isStructClass(simpleType)) {
3948                                         int methodNumId = intDecl.getMethodNumId(method);
3949                                         print("int ___");
3950                                         String helperMethod = methodNumId + "struct" + i;
3951                                         println(helperMethod + "() {");
3952                                         // Now, write the helper body of skeleton!
3953                                         println("string paramCls[] = { \"int\" };");
3954                                         println("int numParam = 1;");
3955                                         println("int param0 = 0;");
3956                                         println("void* paramObj[] = { &param0 };");
3957                                         println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3958                                         println("return param0;");
3959                                         println("}\n");
3960                                 }
3961                         }
3962                 }
3963         }
3964
3965
3966         /**
3967          * HELPER: writeMethodHelperStructSetupCplusCallbackSkeleton() writes the method helper of struct in skeleton class
3968          */
3969         private void writeMethodHelperStructSetupCplusCallbackSkeleton(Collection<String> methods,
3970                         InterfaceDecl intDecl) {
3971
3972                 // Use this set to handle two same methodIds
3973                 for (String method : methods) {
3974
3975                         List<String> methParams = intDecl.getMethodParams(method);
3976                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3977                         // Check for params with structs
3978                         for (int i = 0; i < methParams.size(); i++) {
3979                                 String paramType = methPrmTypes.get(i);
3980                                 String param = methParams.get(i);
3981                                 String simpleType = getSimpleType(paramType);
3982                                 if (isStructClass(simpleType)) {
3983                                         int methodNumId = intDecl.getMethodNumId(method);
3984                                         print("int ___");
3985                                         String helperMethod = methodNumId + "struct" + i;
3986                                         println(helperMethod + "(IoTRMIObject* rmiObj) {");
3987                                         // Now, write the helper body of skeleton!
3988                                         println("string paramCls[] = { \"int\" };");
3989                                         println("int numParam = 1;");
3990                                         println("int param0 = 0;");
3991                                         println("void* paramObj[] = { &param0 };");
3992                                         println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3993                                         println("return param0;");
3994                                         println("}\n");
3995                                 }
3996                         }
3997                 }
3998         }
3999
4000
4001         /**
4002          * HELPER: writeCplusMethodPermission() writes permission checks in skeleton
4003          */
4004         private void writeCplusMethodPermission(String intface) {
4005
4006                 // Get all the different stubs
4007                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
4008                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
4009                         String newIntface = intMeth.getKey();
4010                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
4011                         println("if (_objectId == object" + newObjectId + "Id) {");
4012                         println("if (set" + newObjectId + "Allowed.find(methodId) == set" + newObjectId + "Allowed.end()) {");
4013                         println("cerr << \"Object with object Id: \" << _objectId << \"  is not allowed to access method: \" << methodId << endl;");
4014                         println("exit(-1);");
4015                         println("}");
4016                         println("}");
4017                         println("else {");
4018                         println("cerr << \"Object Id: \" << _objectId << \" not recognized!\" << endl;");
4019                         println("exit(-1);");
4020                         println("}");
4021                 }
4022         }
4023
4024
4025         /**
4026          * HELPER: writeCplusWaitRequestInvokeMethod() writes the main loop of the skeleton class
4027          */
4028         private void writeCplusWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist, String intface) {
4029
4030                 // Use this set to handle two same methodIds
4031                 Set<String> uniqueMethodIds = new HashSet<String>();
4032                 println("void ___waitRequestInvokeMethod() {");
4033                 // Write variables here if we have callbacks or enums or structs
4034                 writeCountVarStructSkeleton(methods, intDecl);
4035                 println("while (true) {");
4036                 println("rmiObj->getMethodBytes();");
4037                 println("int _objectId = rmiObj->getObjectId();");
4038                 println("int methodId = rmiObj->getMethodId();");
4039                 // Generate permission check
4040                 writeCplusMethodPermission(intface);
4041                 println("switch (methodId) {");
4042                 // Print methods and method Ids
4043                 for (String method : methods) {
4044                         String methodId = intDecl.getMethodId(method);
4045                         int methodNumId = intDecl.getMethodNumId(method);
4046                         print("case " + methodNumId + ": ___");
4047                         String helperMethod = methodId;
4048                         if (uniqueMethodIds.contains(methodId))
4049                                 helperMethod = helperMethod + methodNumId;
4050                         else
4051                                 uniqueMethodIds.add(methodId);
4052                         print(helperMethod + "(");
4053                         writeInputCountVarStructSkeleton(method, intDecl);
4054                         println("); break;");
4055                 }
4056                 String method = "___initCallBack()";
4057                 // Print case -9999 (callback handler) if callback exists
4058                 if (callbackExist) {
4059                         int methodId = intDecl.getHelperMethodNumId(method);
4060                         println("case " + methodId + ": ___regCB(); break;");
4061                 }
4062                 writeMethodCallStructSkeleton(methods, intDecl);
4063                 println("default: ");
4064                 println("cerr << \"Method Id \" << methodId << \" not recognized!\" << endl;");
4065                 println("throw exception();");
4066                 println("}");
4067                 println("}");
4068                 println("}\n");
4069         }
4070
4071
4072         /**
4073          * generateCplusSkeletonClass() generate skeletons based on the methods list in C++
4074          */
4075         public void generateCplusSkeletonClass() throws IOException {
4076
4077                 // Create a new directory
4078                 String path = createDirectories(dir, subdir);
4079                 for (String intface : mapIntfacePTH.keySet()) {
4080                         // Open a new file to write into
4081                         String newSkelClass = intface + "_Skeleton";
4082                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".hpp");
4083                         pw = new PrintWriter(new BufferedWriter(fw));
4084                         // Write file headers
4085                         println("#ifndef _" + newSkelClass.toUpperCase() + "_HPP__");
4086                         println("#define _" + newSkelClass.toUpperCase() + "_HPP__");
4087                         println("#include <iostream>");
4088                         println("#include \"" + intface + ".hpp\"\n");
4089                         // Pass in set of methods and get import classes
4090                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4091                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
4092                         List<String> methods = intDecl.getMethods();
4093                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
4094                         List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
4095                         List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
4096                         printIncludeStatements(allIncludeClasses); println("");
4097                         println("using namespace std;\n");
4098                         // Find out if there are callback objects
4099                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
4100                         boolean callbackExist = !callbackClasses.isEmpty();
4101                         // Write class header
4102                         println("class " + newSkelClass + " : public " + intface); println("{");
4103                         println("private:\n");
4104                         // Write properties
4105                         writePropertiesCplusSkeleton(intface, callbackExist, callbackClasses);
4106                         println("public:\n");
4107                         // Write constructor
4108                         writeConstructorCplusSkeleton(newSkelClass, intface, callbackExist);
4109                         // Write deconstructor
4110                         writeDeconstructorCplusSkeleton(newSkelClass, callbackExist, callbackClasses);
4111                         // Write methods
4112                         writeMethodCplusSkeleton(methods, intDecl, callbackClasses, false);
4113                         // Write method helper
4114                         writeMethodHelperCplusSkeleton(methods, intDecl, callbackClasses);
4115                         // Write waitRequestInvokeMethod() - main loop
4116                         writeCplusWaitRequestInvokeMethod(methods, intDecl, callbackExist, intface);
4117                         println("};");
4118                         writePermissionInitializationCplus(intface, newSkelClass, intDecl);
4119                         println("#endif");
4120                         pw.close();
4121                         System.out.println("IoTCompiler: Generated skeleton class " + newSkelClass + ".hpp...");
4122                 }
4123         }
4124
4125
4126         /**
4127          * HELPER: writePropertiesCplusCallbackSkeleton() writes the properties of the callback skeleton class
4128          */
4129         private void writePropertiesCplusCallbackSkeleton(String intface, boolean callbackExist, Set<String> callbackClasses) {
4130
4131                 println(intface + " *mainObj;");
4132                 // Keep track of object Ids of all stubs registered to this interface
4133                 println("static int objectId;");
4134                 // Callback
4135                 if (callbackExist) {
4136                         Iterator it = callbackClasses.iterator();
4137                         String callbackType = (String) it.next();
4138                         String exchangeType = checkAndGetParamClass(callbackType);
4139                         println("// Callback properties");
4140                         println("IoTRMICall* rmiCall;");
4141                         println("vector<" + exchangeType + "*> vecCallbackObj;");
4142                         println("static int objIdCnt;");
4143                 }
4144                 println("\n");
4145         }
4146
4147
4148         /**
4149          * HELPER: writeConstructorCplusCallbackSkeleton() writes the constructor of the skeleton class
4150          */
4151         private void writeConstructorCplusCallbackSkeleton(String newSkelClass, String intface, boolean callbackExist) {
4152
4153                 println(newSkelClass + "(" + intface + " *_mainObj, int _objectId) {");
4154                 println("mainObj = _mainObj;");
4155                 println("objectId = _objectId;");
4156                 // Callback
4157                 if (callbackExist) {
4158                         println("objIdCnt = 0;");
4159                 }
4160                 println("}\n");
4161         }
4162
4163
4164         /**
4165          * HELPER: writeDeconstructorCplusStub() writes the deconstructor of the stub class
4166          */
4167         private void writeDeconstructorCplusCallbackSkeleton(String newStubClass, boolean callbackExist,
4168                         Set<String> callbackClasses) {
4169
4170                 println("~" + newStubClass + "() {");
4171                 if (callbackExist) {
4172                 // We assume that each class only has one callback interface for now
4173                         println("if (rmiCall != NULL) {");
4174                         println("delete rmiCall;");
4175                         println("rmiCall = NULL;");
4176                         println("}");
4177                         Iterator it = callbackClasses.iterator();
4178                         String callbackType = (String) it.next();
4179                         String exchangeType = checkAndGetParamClass(callbackType);
4180                         println("for(" + exchangeType + "* cb : vecCallbackObj) {");
4181                         println("delete cb;");
4182                         println("cb = NULL;");
4183                         println("}");
4184                 }
4185                 println("}");
4186                 println("");
4187         }
4188
4189
4190         /**
4191          * HELPER: writeMethodHelperCplusCallbackSkeleton() writes the method helper of callback skeleton class
4192          */
4193         private void writeMethodHelperCplusCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl,
4194                         Set<String> callbackClasses) {
4195
4196                 // Use this set to handle two same methodIds
4197                 Set<String> uniqueMethodIds = new HashSet<String>();
4198                 for (String method : methods) {
4199
4200                         List<String> methParams = intDecl.getMethodParams(method);
4201                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4202                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
4203                                 String methodId = intDecl.getMethodId(method);
4204                                 print("void ___");
4205                                 String helperMethod = methodId;
4206                                 if (uniqueMethodIds.contains(methodId))
4207                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
4208                                 else
4209                                         uniqueMethodIds.add(methodId);
4210                                 String retType = intDecl.getMethodType(method);
4211                                 print(helperMethod + "(");
4212                                 boolean begin = true;
4213                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
4214                                         String paramType = methPrmTypes.get(i);
4215                                         String param = methParams.get(i);
4216                                         String simpleType = getSimpleType(paramType);
4217                                         if (isStructClass(simpleType)) {
4218                                                 if (!begin) {   // Generate comma for not the beginning variable
4219                                                         print(", "); begin = false;
4220                                                 }
4221                                                 int methodNumId = intDecl.getMethodNumId(method);
4222                                                 print("int struct" + methodNumId + "Size" + i);
4223                                         }
4224                                 }
4225                                 println(", IoTRMIObject* rmiObj) {");
4226                                 writeMethodHelperStructCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
4227                                 println("}\n");
4228                         } else {
4229                                 String methodId = intDecl.getMethodId(method);
4230                                 print("void ___");
4231                                 String helperMethod = methodId;
4232                                 if (uniqueMethodIds.contains(methodId))
4233                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
4234                                 else
4235                                         uniqueMethodIds.add(methodId);
4236                                 // Check if this is "void"
4237                                 String retType = intDecl.getMethodType(method);
4238                                 println(helperMethod + "(IoTRMIObject* rmiObj) {");
4239                                 // Now, write the helper body of skeleton!
4240                                 writeStdMethodHelperBodyCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
4241                                 println("}\n");
4242                         }
4243                 }
4244                 // Write method helper for structs
4245                 writeMethodHelperStructSetupCplusCallbackSkeleton(methods, intDecl);
4246         }
4247
4248
4249         /**
4250          * HELPER: writeCplusCallbackWaitRequestInvokeMethod() writes the request invoke method of the skeleton callback class
4251          */
4252         private void writeCplusCallbackWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl,
4253                         boolean callbackExist) {
4254
4255                 // Use this set to handle two same methodIds
4256                 Set<String> uniqueMethodIds = new HashSet<String>();
4257                 println("void invokeMethod(IoTRMIObject* rmiObj) {");
4258                 // Write variables here if we have callbacks or enums or structs
4259                 writeCountVarStructSkeleton(methods, intDecl);
4260                 // Write variables here if we have callbacks or enums or structs
4261                 println("int methodId = rmiObj->getMethodId();");
4262                 // TODO: code the permission check here!
4263                 println("switch (methodId) {");
4264                 // Print methods and method Ids
4265                 for (String method : methods) {
4266                         String methodId = intDecl.getMethodId(method);
4267                         int methodNumId = intDecl.getMethodNumId(method);
4268                         print("case " + methodNumId + ": ___");
4269                         String helperMethod = methodId;
4270                         if (uniqueMethodIds.contains(methodId))
4271                                 helperMethod = helperMethod + methodNumId;
4272                         else
4273                                 uniqueMethodIds.add(methodId);
4274                         print(helperMethod + "(");
4275                         if (writeInputCountVarStructSkeleton(method, intDecl))
4276                                 println(", rmiObj); break;");
4277                         else
4278                                 println("rmiObj); break;");
4279                 }
4280                 String method = "___initCallBack()";
4281                 // Print case -9999 (callback handler) if callback exists
4282                 if (callbackExist) {
4283                         int methodId = intDecl.getHelperMethodNumId(method);
4284                         println("case " + methodId + ": ___regCB(rmiObj); break;");
4285                 }
4286                 writeMethodCallStructCallbackSkeleton(methods, intDecl);
4287                 println("default: ");
4288                 println("cerr << \"Method Id \" << methodId << \" not recognized!\" << endl;");
4289                 println("throw exception();");
4290                 println("}");
4291                 println("}\n");
4292         }
4293
4294
4295         /**
4296          * generateCplusCallbackSkeletonClass() generate callback skeletons based on the methods list in C++
4297          */
4298         public void generateCplusCallbackSkeletonClass() throws IOException {
4299
4300                 // Create a new directory
4301                 String path = createDirectories(dir, subdir);
4302                 for (String intface : mapIntfacePTH.keySet()) {
4303                         // Open a new file to write into
4304                         String newSkelClass = intface + "_CallbackSkeleton";
4305                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".hpp");
4306                         pw = new PrintWriter(new BufferedWriter(fw));
4307                         // Write file headers
4308                         println("#ifndef _" + newSkelClass.toUpperCase() + "_HPP__");
4309                         println("#define _" + newSkelClass.toUpperCase() + "_HPP__");
4310                         println("#include <iostream>");
4311                         println("#include \"" + intface + ".hpp\"\n");
4312                         // Pass in set of methods and get import classes
4313                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4314                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
4315                         List<String> methods = intDecl.getMethods();
4316                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
4317                         List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
4318                         List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
4319                         printIncludeStatements(allIncludeClasses); println("");
4320                         // Find out if there are callback objects
4321                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
4322                         boolean callbackExist = !callbackClasses.isEmpty();
4323                         println("using namespace std;\n");
4324                         // Write class header
4325                         println("class " + newSkelClass + " : public " + intface); println("{");
4326                         println("private:\n");
4327                         // Write properties
4328                         writePropertiesCplusCallbackSkeleton(intface, callbackExist, callbackClasses);
4329                         println("public:\n");
4330                         // Write constructor
4331                         writeConstructorCplusCallbackSkeleton(newSkelClass, intface, callbackExist);
4332                         // Write deconstructor
4333                         writeDeconstructorCplusCallbackSkeleton(newSkelClass, callbackExist, callbackClasses);
4334                         // Write methods
4335                         writeMethodCplusSkeleton(methods, intDecl, callbackClasses, true);
4336                         // Write method helper
4337                         writeMethodHelperCplusCallbackSkeleton(methods, intDecl, callbackClasses);
4338                         // Write waitRequestInvokeMethod() - main loop
4339                         writeCplusCallbackWaitRequestInvokeMethod(methods, intDecl, callbackExist);
4340                         println("};");
4341                         println("#endif");
4342                         pw.close();
4343                         System.out.println("IoTCompiler: Generated callback skeleton class " + newSkelClass + ".hpp...");
4344                 }
4345         }
4346
4347
4348         /**
4349          * generateInitializer() generate initializer based on type
4350          */
4351         public String generateCplusInitializer(String type) {
4352
4353                 // Generate dummy returns for now
4354                 if (type.equals("short")||
4355                         type.equals("int")      ||
4356                         type.equals("long") ||
4357                         type.equals("float")||
4358                         type.equals("double")) {
4359
4360                         return "0";
4361                 } else if ( type.equals("String") ||
4362                                         type.equals("string")) {
4363
4364                         return "\"\"";
4365                 } else if ( type.equals("char") ||
4366                                         type.equals("byte")) {
4367
4368                         return "\' \'";
4369                 } else if ( type.equals("boolean")) {
4370
4371                         return "false";
4372                 } else {
4373                         return "NULL";
4374                 }
4375         }
4376
4377
4378         /**
4379          * setDirectory() sets a new directory for stub files
4380          */
4381         public void setDirectory(String _subdir) {
4382
4383                 subdir = _subdir;
4384         }
4385
4386
4387         /**
4388          * printUsage() prints the usage of this compiler
4389          */
4390         public static void printUsage() {
4391
4392                 System.out.println();
4393                 System.out.println("Sentinel interface and stub compiler version 1.0");
4394                 System.out.println("Copyright (c) 2015-2016 University of California, Irvine - Programming Language Group.");
4395                 System.out.println("All rights reserved.");
4396                 System.out.println("Usage:");
4397                 System.out.println("\tjava IoTCompiler -help / --help / -h\n");
4398                 System.out.println("\t\tDisplay this help texts\n\n");
4399                 System.out.println("\tjava IoTCompiler [<main-policy-file> <req-policy-file>]");
4400                 System.out.println("\tjava IoTCompiler [<main-policy-file> <req-policy-file>] [options]\n");
4401                 System.out.println("\t\tTake one or more pairs of main-req policy files, and generate Java and/or C++ files\n");
4402                 System.out.println("Options:");
4403                 System.out.println("\t-java\t<directory>\tGenerate Java stub files");
4404                 System.out.println("\t-cplus\t<directory>\tGenerate C++ stub files");
4405                 System.out.println();
4406         }
4407
4408
4409         /**
4410          * parseFile() prepares Lexer and Parser objects, then parses the file
4411          */
4412         public static ParseNode parseFile(String file) {
4413
4414                 ParseNode pn = null;
4415                 try {
4416                         ComplexSymbolFactory csf = new ComplexSymbolFactory();
4417                         ScannerBuffer lexer =
4418                                 new ScannerBuffer(new Lexer(new BufferedReader(new FileReader(file)),csf));
4419                         Parser parse = new Parser(lexer,csf);
4420                         pn = (ParseNode) parse.parse().value;
4421                 } catch (Exception e) {
4422                         e.printStackTrace();
4423                         throw new Error("IoTCompiler: ERROR parsing policy file or wrong command line option: " + file);
4424                 }
4425
4426                 return pn;
4427         }
4428
4429
4430         /**================
4431          * Basic helper functions
4432          **================
4433          */
4434         boolean newline=true;
4435         int tablevel=0;
4436
4437         private void print(String str) {
4438                 if (newline) {
4439                         int tab=tablevel;
4440                         if (str.equals("}"))
4441                                 tab--;
4442                         for(int i=0; i<tab; i++)
4443                                 pw.print("\t");
4444                 }
4445                 pw.print(str);
4446                 updatetabbing(str);
4447                 newline=false;
4448         }
4449
4450
4451         /**
4452          * This function converts Java to C++ type for compilation
4453          */
4454         private String convertType(String jType) {
4455
4456                 return mapPrimitives.get(jType);
4457         }
4458
4459
4460         /**
4461          * A collection of methods with print-to-file functionality
4462          */
4463         private void println(String str) {
4464                 if (newline) {
4465                         int tab = tablevel;
4466                         if (str.contains("}") && !str.contains("{"))
4467                                 tab--;
4468                         for(int i=0; i<tab; i++)
4469                                 pw.print("\t");
4470                 }
4471                 pw.println(str);
4472                 updatetabbing(str);
4473                 newline = true;
4474         }
4475
4476
4477         private void updatetabbing(String str) {
4478
4479                 tablevel+=count(str,'{')-count(str,'}');
4480         }
4481
4482
4483         private int count(String str, char key) {
4484                 char[] array = str.toCharArray();
4485                 int count = 0;
4486                 for(int i=0; i<array.length; i++) {
4487                         if (array[i] == key)
4488                                 count++;
4489                 }
4490                 return count;
4491         }
4492
4493
4494         private void createDirectory(String dirName) {
4495
4496                 File file = new File(dirName);
4497                 if (!file.exists()) {
4498                         if (file.mkdir()) {
4499                                 System.out.println("IoTCompiler: Directory " + dirName + " has been created!");
4500                         } else {
4501                                 System.out.println("IoTCompiler: Failed to create directory " + dirName + "!");
4502                         }
4503                 } else {
4504                         System.out.println("IoTCompiler: Directory " + dirName + " exists...");
4505                 }
4506         }
4507
4508
4509         // Create a directory and possibly a sub directory
4510         private String createDirectories(String dir, String subdir) {
4511
4512                 String path = dir;
4513                 createDirectory(path);
4514                 if (subdir != null) {
4515                         path = path + "/" + subdir;
4516                         createDirectory(path);
4517                 }
4518                 return path;
4519         }
4520
4521
4522         // Inserting array members into a Map object
4523         // that maps arrKey to arrVal objects
4524         private void arraysToMap(Map map, Object[] arrKey, Object[] arrVal) {
4525
4526                 for(int i = 0; i < arrKey.length; i++) {
4527
4528                         map.put(arrKey[i], arrVal[i]);
4529                 }
4530         }
4531
4532
4533         // Return parameter category, i.e. PRIMITIVES, NONPRIMITIVES, USERDEFINED, ENUM, or STRUCT
4534         private ParamCategory getParamCategory(String paramType) {
4535
4536                 if (mapPrimitives.containsKey(paramType)) {
4537                         return ParamCategory.PRIMITIVES;
4538                 // We can either use mapNonPrimitivesJava or mapNonPrimitivesCplus here
4539                 } else if (mapNonPrimitivesJava.containsKey(getSimpleType(paramType))) {
4540                         return ParamCategory.NONPRIMITIVES;
4541                 } else if (isEnumClass(paramType)) {
4542                         return ParamCategory.ENUM;
4543                 } else if (isStructClass(paramType)) {
4544                         return ParamCategory.STRUCT;
4545                 } else
4546                         return ParamCategory.USERDEFINED;
4547         }
4548
4549
4550         // Return full class name for non-primitives to generate Java import statements
4551         // e.g. java.util.Set for Set
4552         private String getNonPrimitiveJavaClass(String paramNonPrimitives) {
4553
4554                 return mapNonPrimitivesJava.get(paramNonPrimitives);
4555         }
4556
4557
4558         // Return full class name for non-primitives to generate Cplus include statements
4559         // e.g. #include <set> for Set
4560         private String getNonPrimitiveCplusClass(String paramNonPrimitives) {
4561
4562                 return mapNonPrimitivesCplus.get(paramNonPrimitives);
4563         }
4564
4565
4566         // Get simple types, e.g. HashSet for HashSet<...>
4567         // Basically strip off the "<...>"
4568         private String getSimpleType(String paramType) {
4569
4570                 // Check if this is generics
4571                 if(paramType.contains("<")) {
4572                         String[] type = paramType.split("<");
4573                         return type[0];
4574                 } else
4575                         return paramType;
4576         }
4577
4578
4579         // Generate a set of standard classes for import statements
4580         private List<String> getStandardJavaIntfaceImportClasses() {
4581
4582                 List<String> importClasses = new ArrayList<String>();
4583                 // Add the standard list first
4584                 importClasses.add("java.util.List");
4585                 importClasses.add("java.util.ArrayList");
4586
4587                 return importClasses;
4588         }
4589
4590
4591         // Generate a set of standard classes for import statements
4592         private List<String> getStandardJavaImportClasses() {
4593
4594                 List<String> importClasses = new ArrayList<String>();
4595                 // Add the standard list first
4596                 importClasses.add("java.io.IOException");
4597                 importClasses.add("java.util.List");
4598                 importClasses.add("java.util.ArrayList");
4599                 importClasses.add("java.util.Arrays");
4600                 importClasses.add("iotrmi.Java.IoTRMICall");
4601                 importClasses.add("iotrmi.Java.IoTRMIObject");
4602
4603                 return importClasses;
4604         }
4605
4606
4607         // Generate a set of standard classes for import statements
4608         private List<String> getStandardCplusIncludeClasses() {
4609
4610                 List<String> importClasses = new ArrayList<String>();
4611                 // Add the standard list first
4612                 importClasses.add("<vector>");
4613                 importClasses.add("<set>");
4614                 importClasses.add("\"IoTRMICall.hpp\"");
4615                 importClasses.add("\"IoTRMIObject.hpp\"");
4616
4617                 return importClasses;
4618         }
4619
4620
4621         // Combine all classes for import statements
4622         private List<String> getAllLibClasses(Collection<String> stdLibClasses, Collection<String> libClasses) {
4623
4624                 List<String> allLibClasses = new ArrayList<String>(stdLibClasses);
4625                 // Iterate over the list of import classes
4626                 for (String str : libClasses) {
4627                         if (!allLibClasses.contains(str)) {
4628                                 allLibClasses.add(str);
4629                         }
4630                 }
4631                 return allLibClasses;
4632         }
4633
4634
4635
4636         // Generate a set of classes for import statements
4637         private Set<String> getImportClasses(Collection<String> methods, InterfaceDecl intDecl) {
4638
4639                 Set<String> importClasses = new HashSet<String>();
4640                 for (String method : methods) {
4641                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4642                         for (String paramType : methPrmTypes) {
4643
4644                                 String simpleType = getSimpleType(paramType);
4645                                 if (getParamCategory(simpleType) == ParamCategory.NONPRIMITIVES) {
4646                                         importClasses.add(getNonPrimitiveJavaClass(simpleType));
4647                                 }
4648                         }
4649                 }
4650                 return importClasses;
4651         }
4652
4653
4654         // Handle and return the correct enum declaration
4655         // In Java, if we declare enum in Camera interface, then it becomes "Camera.<enum>"
4656         private String getEnumParamDecl(String type, InterfaceDecl intDecl) {
4657
4658                 // Strips off array "[]" for return type
4659                 String pureType = getSimpleArrayType(type);
4660                 // Take the inner type of generic
4661                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES)
4662                         pureType = getTypeOfGeneric(type)[0];
4663                 if (isEnumClass(pureType)) {
4664                         String enumType = intDecl.getInterface() + "." + type;
4665                         return enumType;
4666                 } else
4667                         return type;
4668         }
4669
4670
4671         // Handle and return the correct type
4672         private String getEnumParam(String type, String param, int i) {
4673
4674                 // Strips off array "[]" for return type
4675                 String pureType = getSimpleArrayType(type);
4676                 // Take the inner type of generic
4677                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES)
4678                         pureType = getTypeOfGeneric(type)[0];
4679                 if (isEnumClass(pureType)) {
4680                         String enumParam = "paramEnum" + i;
4681                         return enumParam;
4682                 } else
4683                         return param;
4684         }
4685
4686
4687         // Handle and return the correct enum declaration translate into int[]
4688         private String getEnumType(String type) {
4689
4690                 // Strips off array "[]" for return type
4691                 String pureType = getSimpleArrayType(type);
4692                 // Take the inner type of generic
4693                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES)
4694                         pureType = getTypeOfGeneric(type)[0];
4695                 if (isEnumClass(pureType)) {
4696                         String enumType = "int[]";
4697                         return enumType;
4698                 } else
4699                         return type;
4700         }
4701
4702
4703         // Handle and return the correct struct declaration
4704         private String getStructType(String type) {
4705
4706                 // Strips off array "[]" for return type
4707                 String pureType = getSimpleArrayType(type);
4708                 // Take the inner type of generic
4709                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES)
4710                         pureType = getTypeOfGeneric(type)[0];
4711                 if (isStructClass(pureType)) {
4712                         String structType = "int";
4713                         return structType;
4714                 } else
4715                         return type;
4716         }
4717
4718
4719         // Check if this an enum declaration
4720         private boolean isEnumClass(String type) {
4721
4722                 // Just iterate over the set of interfaces
4723                 for (String intface : mapIntfacePTH.keySet()) {
4724                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4725                         EnumDecl enumDecl = (EnumDecl) decHandler.getEnumDecl(intface);
4726                         Set<String> setEnumDecl = enumDecl.getEnumDeclarations();
4727                         if (setEnumDecl.contains(type))
4728                                 return true;
4729                 }
4730                 return false;
4731         }
4732
4733
4734         // Check if this an struct declaration
4735         private boolean isStructClass(String type) {
4736
4737                 // Just iterate over the set of interfaces
4738                 for (String intface : mapIntfacePTH.keySet()) {
4739                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4740                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4741                         List<String> listStructDecl = structDecl.getStructTypes();
4742                         if (listStructDecl.contains(type))
4743                                 return true;
4744                 }
4745                 return false;
4746         }
4747
4748
4749         // Return a struct declaration
4750         private StructDecl getStructDecl(String type) {
4751
4752                 // Just iterate over the set of interfaces
4753                 for (String intface : mapIntfacePTH.keySet()) {
4754                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4755                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4756                         List<String> listStructDecl = structDecl.getStructTypes();
4757                         if (listStructDecl.contains(type))
4758                                 return structDecl;
4759                 }
4760                 return null;
4761         }
4762
4763
4764         // Return number of members (-1 if not found)
4765         private int getNumOfMembers(String type) {
4766
4767                 // Just iterate over the set of interfaces
4768                 for (String intface : mapIntfacePTH.keySet()) {
4769                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4770                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4771                         List<String> listStructDecl = structDecl.getStructTypes();
4772                         if (listStructDecl.contains(type))
4773                                 return structDecl.getNumOfMembers(type);
4774                 }
4775                 return -1;
4776         }
4777
4778
4779         // Generate a set of classes for include statements
4780         private Set<String> getIncludeClasses(Collection<String> methods, InterfaceDecl intDecl, String intface, boolean needExchange) {
4781
4782                 Set<String> includeClasses = new HashSet<String>();
4783                 for (String method : methods) {
4784
4785                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4786                         List<String> methParams = intDecl.getMethodParams(method);
4787                         for (int i = 0; i < methPrmTypes.size(); i++) {
4788
4789                                 String simpleType = getSimpleType(methPrmTypes.get(i));
4790                                 String param = methParams.get(i);
4791                                 if (getParamCategory(simpleType) == ParamCategory.NONPRIMITIVES) {
4792                                         includeClasses.add("<" + getNonPrimitiveCplusClass(simpleType) + ">");
4793                                 } else if (getParamCategory(simpleType) == ParamCategory.USERDEFINED) {
4794                                         // For original interface, we need it exchanged... not for stub interfaces
4795                                         if (needExchange) {
4796                                                 includeClasses.add("\"" + exchangeParamType(simpleType) + ".hpp\"");
4797                                                 includeClasses.add("\"" + exchangeParamType(simpleType) + "_CallbackStub.hpp\"");
4798                                         } else {
4799                                                 includeClasses.add("\"" + simpleType + ".hpp\"");
4800                                                 includeClasses.add("\"" + simpleType + "_CallbackSkeleton.hpp\"");
4801                                         }
4802                                 } else if (getParamCategory(getSimpleArrayType(simpleType)) == ParamCategory.ENUM) {
4803                                         includeClasses.add("\"" + simpleType + ".hpp\"");
4804                                 } else if (getParamCategory(getSimpleArrayType(simpleType)) == ParamCategory.STRUCT) {
4805                                         includeClasses.add("\"" + simpleType + ".hpp\"");
4806                                 } else if (param.contains("[]")) {
4807                                 // Check if this is array for C++; translate into vector
4808                                         includeClasses.add("<vector>");
4809                                 }
4810                         }
4811                 }
4812                 return includeClasses;
4813         }
4814
4815
4816         // Generate a set of callback classes
4817         private Set<String> getCallbackClasses(Collection<String> methods, InterfaceDecl intDecl) {
4818
4819                 Set<String> callbackClasses = new HashSet<String>();
4820                 for (String method : methods) {
4821
4822                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4823                         List<String> methParams = intDecl.getMethodParams(method);
4824                         for (int i = 0; i < methPrmTypes.size(); i++) {
4825
4826                                 String type = methPrmTypes.get(i);
4827                                 if (getParamCategory(type) == ParamCategory.USERDEFINED) {
4828                                         callbackClasses.add(type);
4829                                 } else if (getParamCategory(type) == ParamCategory.NONPRIMITIVES) {
4830                                 // Can be a List<...> of callback objects ...
4831                                         String genericType = getTypeOfGeneric(type)[0];
4832                                         if (getParamCategory(type) == ParamCategory.USERDEFINED) {
4833                                                 callbackClasses.add(type);
4834                                         }
4835                                 }
4836                         }
4837                 }
4838                 return callbackClasses;
4839         }
4840
4841
4842         // Print import statements into file
4843         private void printImportStatements(Collection<String> importClasses) {
4844
4845                 for(String cls : importClasses) {
4846                         println("import " + cls + ";");
4847                 }
4848         }
4849
4850
4851         // Print include statements into file
4852         private void printIncludeStatements(Collection<String> includeClasses) {
4853
4854                 for(String cls : includeClasses) {
4855                         println("#include " + cls);
4856                 }
4857         }
4858
4859
4860         // Get the C++ version of a non-primitive type
4861         // e.g. set for Set and map for Map
4862         // Input nonPrimitiveType has to be generics in format
4863         private String[] getTypeOfGeneric(String nonPrimitiveType) {
4864
4865                 // Handle <, >, and , for 2-type generic/template
4866                 String[] substr = nonPrimitiveType.split("<")[1].split(">")[0].split(",");
4867                 return substr;
4868         }
4869
4870
4871         // Gets generic type inside "<" and ">"
4872         private String getGenericType(String type) {
4873
4874                 // Handle <, >, and , for 2-type generic/template
4875                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES) {
4876                         String[] substr = type.split("<")[1].split(">")[0].split(",");
4877                         return substr[0];
4878                 } else
4879                         return type;
4880         }
4881
4882
4883         // This helper function strips off array declaration, e.g. int[] becomes int
4884         private String getSimpleArrayType(String type) {
4885
4886                 // Handle [ for array declaration
4887                 String substr = type;
4888                 if (type.contains("[]")) {
4889                         substr = type.split("\\[\\]")[0];
4890                 }
4891                 return substr;
4892         }
4893
4894
4895         // This helper function strips off array declaration, e.g. D[] becomes D
4896         private String getSimpleIdentifier(String ident) {
4897
4898                 // Handle [ for array declaration
4899                 String substr = ident;
4900                 if (ident.contains("[]")) {
4901                         substr = ident.split("\\[\\]")[0];
4902                 }
4903                 return substr;
4904         }
4905
4906
4907         // Checks and gets type in C++
4908         private String checkAndGetCplusType(String paramType) {
4909
4910                 if (getParamCategory(paramType) == ParamCategory.PRIMITIVES) {
4911                         return convertType(paramType);
4912                 } else if (getParamCategory(paramType) == ParamCategory.NONPRIMITIVES) {
4913
4914                         // Check for generic/template format
4915                         if (paramType.contains("<") && paramType.contains(">")) {
4916
4917                                 String genericClass = getSimpleType(paramType);
4918                                 String[] genericType = getTypeOfGeneric(paramType);
4919                                 String cplusTemplate = null;
4920                                 if (genericType.length == 1) // Generic/template with one type
4921                                         cplusTemplate = getNonPrimitiveCplusClass(genericClass) +
4922                                                 "<" + convertType(genericType[0]) + ">";
4923                                 else // Generic/template with two types
4924                                         cplusTemplate = getNonPrimitiveCplusClass(genericClass) +
4925                                                 "<" + convertType(genericType[0]) + "," + convertType(genericType[1]) + ">";
4926                                 return cplusTemplate;
4927                         } else
4928                                 return getNonPrimitiveCplusClass(paramType);
4929                 } else if(paramType.contains("[]")) {   // Array type (used for return type only)
4930                         String cArray = "vector<" + convertType(getSimpleArrayType(paramType)) + ">";
4931                         return cArray;
4932                 } else if(getParamCategory(paramType) == ParamCategory.USERDEFINED) {
4933                         return paramType + "*";
4934                 } else
4935                         // Just return it as is if it's not non-primitives
4936                         return paramType;
4937                         //return checkAndGetParamClass(paramType, true);
4938         }
4939
4940
4941         // Detect array declaration, e.g. int A[],
4942         //              then generate "int A[]" in C++ as "vector<int> A"
4943         private String checkAndGetCplusArray(String paramType, String param) {
4944
4945                 String paramComplete = null;
4946                 // Check for array declaration
4947                 if (param.contains("[]")) {
4948                         paramComplete = "vector<" + paramType + "> " + param.replace("[]","");
4949                 } else
4950                         // Just return it as is if it's not an array
4951                         paramComplete = paramType + " " + param;
4952
4953                 return paramComplete;
4954         }
4955
4956
4957         // Detect array declaration, e.g. int A[],
4958         //              then generate "int A[]" in C++ as "vector<int> A"
4959         // This method just returns the type
4960         private String checkAndGetCplusArrayType(String paramType) {
4961
4962                 String paramTypeRet = null;
4963                 // Check for array declaration
4964                 if (paramType.contains("[]")) {
4965                         String type = paramType.split("\\[\\]")[0];
4966                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4967                 } else if (paramType.contains("vector")) {
4968                         // Just return it as is if it's not an array
4969                         String type = paramType.split("<")[1].split(">")[0];
4970                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4971                 } else
4972                         paramTypeRet = paramType;
4973
4974                 return paramTypeRet;
4975         }
4976
4977
4978         // Detect array declaration, e.g. int A[],
4979         //              then generate "int A[]" in C++ as "vector<int> A"
4980         // This method just returns the type
4981         private String checkAndGetCplusArrayType(String paramType, String param) {
4982
4983                 String paramTypeRet = null;
4984                 // Check for array declaration
4985                 if (param.contains("[]")) {
4986                         paramTypeRet = checkAndGetCplusType(paramType) + "[]";
4987                 } else if (paramType.contains("vector")) {
4988                         // Just return it as is if it's not an array
4989                         String type = paramType.split("<")[1].split(">")[0];
4990                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4991                 } else
4992                         paramTypeRet = paramType;
4993
4994                 return paramTypeRet;
4995         }
4996
4997
4998         // Return the class type for class resolution (for return value)
4999         // - Check and return C++ array class, e.g. int A[] into int*
5000         // - Check and return C++ vector class, e.g. List<Integer> A into vector<int>
5001         private String checkAndGetCplusRetClsType(String paramType) {
5002
5003                 String paramTypeRet = null;
5004                 // Check for array declaration
5005                 if (paramType.contains("[]")) {
5006                         String type = paramType.split("\\[\\]")[0];
5007                         paramTypeRet = getSimpleArrayType(type) + "*";
5008                 } else if (paramType.contains("<") && paramType.contains(">")) {
5009                         // Just return it as is if it's not an array
5010                         String type = paramType.split("<")[1].split(">")[0];
5011                         paramTypeRet = "vector<" + getGenericType(type) + ">";
5012                 } else
5013                         paramTypeRet = paramType;
5014
5015                 return paramTypeRet;
5016         }
5017
5018
5019         // Return the class type for class resolution (for method arguments)
5020         // - Check and return C++ array class, e.g. int A[] into int*
5021         // - Check and return C++ vector class, e.g. List<Integer> A into vector<int>
5022         private String checkAndGetCplusArgClsType(String paramType, String param) {
5023
5024                 String paramTypeRet = null;
5025                 // Check for array declaration
5026                 if (param.contains("[]")) {
5027                         paramTypeRet = getSimpleArrayType(paramType) + "*";
5028                 } else if (paramType.contains("<") && paramType.contains(">")) {
5029                         // Just return it as is if it's not an array
5030                         String type = paramType.split("<")[1].split(">")[0];
5031                         paramTypeRet = "vector<" + getGenericType(type) + ">";
5032                 } else
5033                         paramTypeRet = paramType;
5034
5035                 return paramTypeRet;
5036         }
5037
5038
5039         // Detect array declaration, e.g. int A[],
5040         //              then generate type "int[]"
5041         private String checkAndGetArray(String paramType, String param) {
5042
5043                 String paramTypeRet = null;
5044                 // Check for array declaration
5045                 if (param.contains("[]")) {
5046                         paramTypeRet = paramType + "[]";
5047                 } else
5048                         // Just return it as is if it's not an array
5049                         paramTypeRet = paramType;
5050
5051                 return paramTypeRet;
5052         }
5053
5054
5055         // Is array or list?
5056         private boolean isArrayOrList(String paramType, String param) {
5057
5058                 // Check for array declaration
5059                 if (isArray(param))
5060                         return true;
5061                 else if (isList(paramType))
5062                         return true;
5063                 else
5064                         return false;
5065         }
5066
5067
5068         // Is array?
5069         // For return type we use retType as input parameter
5070         private boolean isArray(String param) {
5071
5072                 // Check for array declaration
5073                 if (param.contains("[]"))
5074                         return true;
5075                 else
5076                         return false;
5077         }
5078
5079
5080         // Is list?
5081         private boolean isList(String paramType) {
5082
5083                 // Check for array declaration
5084                 if (paramType.contains("List"))
5085                         return true;
5086                 else
5087                         return false;
5088         }
5089
5090
5091         // Get the right type for a callback object
5092         private String checkAndGetParamClass(String paramType) {
5093
5094                 // Check if this is generics
5095                 if(getParamCategory(paramType) == ParamCategory.USERDEFINED) {
5096                         return exchangeParamType(paramType);
5097                 } else
5098                         return paramType;
5099         }
5100
5101
5102         // Returns the other interface for type-checking purposes for USERDEFINED
5103         //              classes based on the information provided in multiple policy files
5104         // e.g. return CameraWithXXX instead of Camera
5105         private String exchangeParamType(String intface) {
5106
5107                 // Param type that's passed is the interface name we need to look for
5108                 //              in the map of interfaces, based on available policy files.
5109                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
5110                 if (decHandler != null) {
5111                 // We've found the required interface policy files
5112                         RequiresDecl reqDecl = (RequiresDecl) decHandler.getRequiresDecl(intface);
5113                         Set<String> setExchInt = reqDecl.getInterfaces();
5114                         if (setExchInt.size() == 1) {
5115                                 Iterator iter = setExchInt.iterator();
5116                                 return (String) iter.next();
5117                         } else {
5118                                 throw new Error("IoTCompiler: Ambiguous stub interfaces: " + setExchInt.toString() +
5119                                         ". Only one new interface can be declared if the object " + intface +
5120                                         " needs to be passed in as an input parameter!");
5121                         }
5122                 } else {
5123                 // NULL value - this means policy files missing
5124                         throw new Error("IoTCompiler: Parameter type lookup failed for " + intface +
5125                                 "... Please provide the necessary policy files for user-defined types." +
5126                                 " If this is an array please type the brackets after the variable name," +
5127                                 " e.g. \"String str[]\", not \"String[] str\"." +
5128                                 " If this is a Collections (Java) / STL (C++) type, this compiler only" +
5129                                 " supports List/ArrayList (Java) or list (C++).");
5130                 }
5131         }
5132
5133
5134         public static void main(String[] args) throws Exception {
5135
5136                 // If there is no argument or just "--help" or "-h", then invoke printUsage()
5137                 if ((args[0].equals("-help") ||
5138                          args[0].equals("--help")||
5139                          args[0].equals("-h"))   ||
5140                         (args.length == 0)) {
5141
5142                         IoTCompiler.printUsage();
5143
5144                 } else if (args.length > 1) {
5145
5146                         IoTCompiler comp = new IoTCompiler();
5147                         int i = 0;
5148                         do {
5149                                 // Parse main policy file
5150                                 ParseNode pnPol = IoTCompiler.parseFile(args[i]);
5151                                 // Parse "requires" policy file
5152                                 ParseNode pnReq = IoTCompiler.parseFile(args[i+1]);
5153                                 // Get interface name
5154                                 String intface = ParseTreeHandler.getOrigIntface(pnPol);
5155                                 comp.setDataStructures(intface, pnPol, pnReq);
5156                                 comp.getMethodsForIntface(intface);
5157                                 i = i + 2;
5158                         // 1) Check if this is the last option before "-java" or "-cplus"
5159                         // 2) Check if this is really the last option (no "-java" or "-cplus")
5160                         } while(!args[i].equals("-java") &&
5161                                         !args[i].equals("-cplus") &&
5162                                         (i < args.length));
5163
5164                         // Generate everything if we don't see "-java" or "-cplus"
5165                         if (i == args.length) {
5166                                 comp.generateEnumJava();
5167                                 comp.generateStructJava();
5168                                 comp.generateJavaLocalInterfaces();
5169                                 comp.generateJavaInterfaces();
5170                                 comp.generateJavaStubClasses();
5171                                 comp.generateJavaCallbackStubClasses();
5172                                 comp.generateJavaSkeletonClass();
5173                                 comp.generateJavaCallbackSkeletonClass();
5174                                 comp.generateEnumCplus();
5175                                 comp.generateStructCplus();
5176                                 comp.generateCplusLocalInterfaces();
5177                                 comp.generateCPlusInterfaces();
5178                                 comp.generateCPlusStubClasses();
5179                                 comp.generateCPlusCallbackStubClasses();
5180                                 comp.generateCplusSkeletonClass();
5181                                 comp.generateCplusCallbackSkeletonClass();
5182                         } else {
5183                         // Check other options
5184                                 while(i < args.length) {
5185                                         // Error checking
5186                                         if (!args[i].equals("-java") &&
5187                                                 !args[i].equals("-cplus")) {
5188                                                 throw new Error("IoTCompiler: ERROR - unrecognized command line option: " + args[i]);
5189                                         } else {
5190                                                 if (i + 1 < args.length) {
5191                                                         comp.setDirectory(args[i+1]);
5192                                                 } else
5193                                                         throw new Error("IoTCompiler: ERROR - please provide <directory> after option: " + args[i]);
5194
5195                                                 if (args[i].equals("-java")) {
5196                                                         comp.generateEnumJava();
5197                                                         comp.generateStructJava();
5198                                                         comp.generateJavaLocalInterfaces();
5199                                                         comp.generateJavaInterfaces();
5200                                                         comp.generateJavaStubClasses();
5201                                                         comp.generateJavaCallbackStubClasses();
5202                                                         comp.generateJavaSkeletonClass();
5203                                                         comp.generateJavaCallbackSkeletonClass();
5204                                                 } else {
5205                                                         comp.generateEnumCplus();
5206                                                         comp.generateStructCplus();
5207                                                         comp.generateCplusLocalInterfaces();
5208                                                         comp.generateCPlusInterfaces();
5209                                                         comp.generateCPlusStubClasses();
5210                                                         comp.generateCPlusCallbackStubClasses();
5211                                                         comp.generateCplusSkeletonClass();
5212                                                         comp.generateCplusCallbackSkeletonClass();
5213                                                 }
5214                                         }
5215                                         i = i + 2;
5216                                 }
5217                         }
5218                 } else {
5219                 // Need to at least have exactly 2 parameters, i.e. main policy file and requires file
5220                         IoTCompiler.printUsage();
5221                         throw new Error("IoTCompiler: At least two arguments (main and requires policy files) have to be provided!");
5222                 }
5223         }
5224 }
5225
5226