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