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
1594                 checkAndWriteEnumTypeJavaSkeleton(methParams, methPrmTypes);
1595                 Map<Integer,String> mapStubParam = null;
1596                 if (isCallbackMethod)
1597                         mapStubParam = writeCallbackJavaStubGeneration(methParams, methPrmTypes, callbackType);
1598                 // Check if this is "void"
1599                 String retType = intDecl.getMethodType(method);
1600                 if (retType.equals("void")) {
1601                         print(intDecl.getMethodId(method) + "(");
1602                 } else if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) {   // Enum type
1603                         checkAndWriteEnumRetTypeJavaSkeleton(retType, intDecl.getMethodId(method));
1604                 } else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) { // Struct type
1605                         print(retType + " retStruct = " + intDecl.getMethodId(method) + "(");
1606                 } else { // We do have a return value
1607                         print("Object retObj = " + intDecl.getMethodId(method) + "(");
1608                 }
1609                 for (int i = 0; i < methParams.size(); i++) {
1610
1611                         if (isCallbackMethod) {
1612                                 print(mapStubParam.get(i));     // Get the callback parameter
1613                         } else if (isEnumClass(getSimpleType(methPrmTypes.get(i)))) { // Enum class
1614                                 print(getEnumParam(methPrmTypes.get(i), methParams.get(i), i));
1615                         } else if (isStructClass(getSimpleType(methPrmTypes.get(i)))) {
1616                                 print("paramStruct" + i);
1617                         } else {
1618                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1619                                 print("(" + prmType + ") paramObj[offset" + i + "]");
1620                         }
1621                         if (i != methParams.size() - 1)
1622                                 print(", ");
1623                 }
1624                 println(");");
1625                 if (!retType.equals("void")) {
1626                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) { // Enum type
1627                                 checkAndWriteEnumRetConvJavaSkeleton(retType);
1628                                 println("rmiObj.sendReturnObj(retObj);");
1629                         } else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) { // Struct type
1630                                 writeStructReturnJavaSkeleton(getSimpleArrayType(getSimpleType(retType)), retType);
1631                                 println("rmiObj.sendReturnObj(retCls, retObj);");
1632                         } else
1633                                 println("rmiObj.sendReturnObj(retObj);");
1634                 }
1635                 if (isCallbackMethod) { // Catch exception if this is callback
1636                         println("} catch(Exception ex) {");
1637                         println("ex.printStackTrace();");
1638                         println("throw new Error(\"Exception from callback object instantiation!\");");
1639                         println("}");
1640                 }
1641         }
1642
1643
1644         /**
1645          * HELPER: writeMethodHelperStructJavaSkeleton() writes the struct in skeleton
1646          */
1647         private void writeMethodHelperStructJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1648                         List<String> methPrmTypes, String method, Set<String> callbackClasses) {
1649
1650                 // Generate array of parameter objects
1651                 boolean isCallbackMethod = false;
1652                 String callbackType = null;
1653                 print("int paramLen = ");
1654                 writeLengthStructParamClassSkeleton(methParams, methPrmTypes, method, intDecl);
1655                 println(";");
1656                 println("Class<?>[] paramCls = new Class<?>[paramLen];");
1657                 println("Class<?>[] paramClsGen = new Class<?>[paramLen];");
1658                 // Iterate again over the parameters
1659                 for (int i = 0; i < methParams.size(); i++) {
1660                         String paramType = methPrmTypes.get(i);
1661                         String param = methParams.get(i);
1662                         String simpleType = getGenericType(paramType);
1663                         if (isStructClass(simpleType)) {
1664                                 writeStructMembersJavaSkeleton(simpleType, paramType, param, method, intDecl, i);
1665                         } else {
1666                                 String prmType = returnGenericCallbackType(methPrmTypes.get(i));
1667                                 if (callbackClasses.contains(prmType)) {
1668                                         isCallbackMethod = true;
1669                                         callbackType = prmType;
1670                                         println("paramCls[pos] = int.class;");
1671                                         println("paramClsGen[pos++] = null;");
1672                                 } else {        // Generate normal classes if it's not a callback object
1673                                         String paramTypeOth = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1674                                         println("paramCls[pos] = " + getSimpleType(getEnumType(paramTypeOth)) + ".class;");
1675                                         print("paramClsGen[pos++] = ");
1676                                         String prmTypeOth = methPrmTypes.get(i);
1677                                         if (getParamCategory(prmTypeOth) == ParamCategory.NONPRIMITIVES)
1678                                                 println(getTypeOfGeneric(prmType)[0] + ".class;");
1679                                         else
1680                                                 println("null;");
1681                                 }
1682                         }
1683                 }
1684                 println("Object[] paramObj = rmiObj.getMethodParams(paramCls, paramClsGen);");
1685                 writeStructMembersInitJavaSkeleton(intDecl, methParams, methPrmTypes, method);
1686                 // Write the return value part
1687                 writeMethodHelperReturnJavaSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod, callbackType);
1688         }
1689
1690
1691         /**
1692          * HELPER: writeStdMethodHelperBodyJavaSkeleton() writes the standard method body helper in the skeleton class
1693          */
1694         private void writeStdMethodHelperBodyJavaSkeleton(InterfaceDecl intDecl, List<String> methParams,
1695                         List<String> methPrmTypes, String method, Set<String> callbackClasses) {
1696
1697                 // Generate array of parameter objects
1698                 boolean isCallbackMethod = false;
1699                 String callbackType = null;
1700                 print("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { ");
1701                 for (int i = 0; i < methParams.size(); i++) {
1702
1703                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
1704                         if (callbackClasses.contains(paramType)) {
1705                                 isCallbackMethod = true;
1706                                 callbackType = paramType;
1707                                 print("int.class");
1708                         } else {        // Generate normal classes if it's not a callback object
1709                                 String prmType = checkAndGetArray(methPrmTypes.get(i), methParams.get(i));
1710                                 print(getSimpleType(getEnumType(prmType)) + ".class");
1711                         }
1712                         if (i != methParams.size() - 1)
1713                                 print(", ");
1714                 }
1715                 println(" }, ");
1716                 // Generate generic class if it's a generic type.. null otherwise
1717                 print("new Class<?>[] { ");
1718                 for (int i = 0; i < methParams.size(); i++) {
1719                         String prmType = methPrmTypes.get(i);
1720                         if (getParamCategory(prmType) == ParamCategory.NONPRIMITIVES)
1721                                 print(getTypeOfGeneric(prmType)[0] + ".class");
1722                         else
1723                                 print("null");
1724                         if (i != methParams.size() - 1)
1725                                 print(", ");
1726                 }
1727                 println(" });");
1728                 // Write the return value part
1729                 writeMethodHelperReturnJavaSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod, callbackType);
1730         }
1731
1732
1733         /**
1734          * HELPER: writeMethodHelperJavaSkeleton() writes the method helper of the skeleton class
1735          */
1736         private void writeMethodHelperJavaSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
1737
1738                 // Use this set to handle two same methodIds
1739                 Set<String> uniqueMethodIds = new HashSet<String>();
1740                 for (String method : methods) {
1741
1742                         List<String> methParams = intDecl.getMethodParams(method);
1743                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1744                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
1745                                 String methodId = intDecl.getMethodId(method);
1746                                 print("public void ___");
1747                                 String helperMethod = methodId;
1748                                 if (uniqueMethodIds.contains(methodId))
1749                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
1750                                 else
1751                                         uniqueMethodIds.add(methodId);
1752                                 String retType = intDecl.getMethodType(method);
1753                                 print(helperMethod + "(");
1754                                 boolean begin = true;
1755                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
1756                                         String paramType = methPrmTypes.get(i);
1757                                         String param = methParams.get(i);
1758                                         String simpleType = getSimpleType(paramType);
1759                                         if (isStructClass(simpleType)) {
1760                                                 if (!begin) {   // Generate comma for not the beginning variable
1761                                                         print(", "); begin = false;
1762                                                 }
1763                                                 int methodNumId = intDecl.getMethodNumId(method);
1764                                                 print("int struct" + methodNumId + "Size" + i);
1765                                         }
1766                                 }
1767                                 // Check if this is "void"
1768                                 if (retType.equals("void"))
1769                                         println(") {");
1770                                 else
1771                                         println(") throws IOException {");
1772                                 writeMethodHelperStructJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
1773                                 println("}\n");
1774                         } else {
1775                                 String methodId = intDecl.getMethodId(method);
1776                                 print("public void ___");
1777                                 String helperMethod = methodId;
1778                                 if (uniqueMethodIds.contains(methodId))
1779                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
1780                                 else
1781                                         uniqueMethodIds.add(methodId);
1782                                 // Check if this is "void"
1783                                 String retType = intDecl.getMethodType(method);
1784                                 if (retType.equals("void"))
1785                                         println(helperMethod + "() {");
1786                                 else
1787                                         println(helperMethod + "() throws IOException {");
1788                                 // Now, write the helper body of skeleton!
1789                                 writeStdMethodHelperBodyJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
1790                                 println("}\n");
1791                         }
1792                 }
1793                 // Write method helper for structs
1794                 writeMethodHelperStructSetupJavaSkeleton(methods, intDecl);
1795         }
1796
1797
1798         /**
1799          * HELPER: writeMethodHelperStructSetupJavaSkeleton() writes the method helper of struct setup in skeleton class
1800          */
1801         private void writeMethodHelperStructSetupJavaSkeleton(Collection<String> methods,
1802                         InterfaceDecl intDecl) {
1803
1804                 // Use this set to handle two same methodIds
1805                 for (String method : methods) {
1806
1807                         List<String> methParams = intDecl.getMethodParams(method);
1808                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1809                         // Check for params with structs
1810                         for (int i = 0; i < methParams.size(); i++) {
1811                                 String paramType = methPrmTypes.get(i);
1812                                 String param = methParams.get(i);
1813                                 String simpleType = getSimpleType(paramType);
1814                                 if (isStructClass(simpleType)) {
1815                                         int methodNumId = intDecl.getMethodNumId(method);
1816                                         print("public int ___");
1817                                         String helperMethod = methodNumId + "struct" + i;
1818                                         println(helperMethod + "() {");
1819                                         // Now, write the helper body of skeleton!
1820                                         println("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { int.class }, new Class<?>[] { null });");
1821                                         println("return (int) paramObj[0];");
1822                                         println("}\n");
1823                                 }
1824                         }
1825                 }
1826         }
1827
1828
1829         /**
1830          * HELPER: writeMethodHelperStructSetupJavaCallbackSkeleton() writes the method helper of struct setup in callback skeleton class
1831          */
1832         private void writeMethodHelperStructSetupJavaCallbackSkeleton(Collection<String> methods,
1833                         InterfaceDecl intDecl) {
1834
1835                 // Use this set to handle two same methodIds
1836                 for (String method : methods) {
1837
1838                         List<String> methParams = intDecl.getMethodParams(method);
1839                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1840                         // Check for params with structs
1841                         for (int i = 0; i < methParams.size(); i++) {
1842                                 String paramType = methPrmTypes.get(i);
1843                                 String param = methParams.get(i);
1844                                 String simpleType = getSimpleType(paramType);
1845                                 if (isStructClass(simpleType)) {
1846                                         int methodNumId = intDecl.getMethodNumId(method);
1847                                         print("public int ___");
1848                                         String helperMethod = methodNumId + "struct" + i;
1849                                         println(helperMethod + "(IoTRMIObject rmiObj) {");
1850                                         // Now, write the helper body of skeleton!
1851                                         println("Object[] paramObj = rmiObj.getMethodParams(new Class<?>[] { int.class }, new Class<?>[] { null });");
1852                                         println("return (int) paramObj[0];");
1853                                         println("}\n");
1854                                 }
1855                         }
1856                 }
1857         }
1858
1859
1860         /**
1861          * HELPER: writeCountVarStructSkeleton() writes counter variable of struct for skeleton
1862          */
1863         private void writeCountVarStructSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1864
1865                 // Use this set to handle two same methodIds
1866                 for (String method : methods) {
1867
1868                         List<String> methParams = intDecl.getMethodParams(method);
1869                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1870                         // Check for params with structs
1871                         for (int i = 0; i < methParams.size(); i++) {
1872                                 String paramType = methPrmTypes.get(i);
1873                                 String param = methParams.get(i);
1874                                 String simpleType = getSimpleType(paramType);
1875                                 if (isStructClass(simpleType)) {
1876                                         int methodNumId = intDecl.getMethodNumId(method);
1877                                         println("int struct" + methodNumId + "Size" + i + " = 0;");
1878                                 }
1879                         }
1880                 }
1881         }
1882
1883
1884         /**
1885          * HELPER: writeInputCountVarStructSkeleton() writes input counter variable of struct for skeleton
1886          */
1887         private boolean writeInputCountVarStructSkeleton(String method, InterfaceDecl intDecl) {
1888
1889                 List<String> methParams = intDecl.getMethodParams(method);
1890                 List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1891                 boolean structExist = false;
1892                 // Check for params with structs
1893                 for (int i = 0; i < methParams.size(); i++) {
1894                         String paramType = methPrmTypes.get(i);
1895                         String param = methParams.get(i);
1896                         String simpleType = getSimpleType(paramType);
1897                         boolean begin = true;
1898                         if (isStructClass(simpleType)) {
1899                                 structExist = true;
1900                                 if (!begin) {
1901                                         print(", "); begin = false;
1902                                 }
1903                                 int methodNumId = intDecl.getMethodNumId(method);
1904                                 print("struct" + methodNumId + "Size" + i);
1905                         }
1906                 }
1907                 return structExist;
1908         }
1909
1910
1911         /**
1912          * HELPER: writeMethodCallStructSkeleton() writes method call for wait invoke in skeleton
1913          */
1914         private void writeMethodCallStructSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1915
1916                 // Use this set to handle two same methodIds
1917                 for (String method : methods) {
1918
1919                         List<String> methParams = intDecl.getMethodParams(method);
1920                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1921                         // Check for params with structs
1922                         for (int i = 0; i < methParams.size(); i++) {
1923                                 String paramType = methPrmTypes.get(i);
1924                                 String param = methParams.get(i);
1925                                 String simpleType = getSimpleType(paramType);
1926                                 if (isStructClass(simpleType)) {
1927                                         int methodNumId = intDecl.getMethodNumId(method);
1928                                         print("case ");
1929                                         String helperMethod = methodNumId + "struct" + i;
1930                                         String tempVar = "struct" + methodNumId + "Size" + i;
1931                                         print(intDecl.getHelperMethodNumId(helperMethod) + ": ");
1932                                         print(tempVar + " = ___");
1933                                         println(helperMethod + "(); break;");
1934                                 }
1935                         }
1936                 }
1937         }
1938
1939
1940         /**
1941          * HELPER: writeMethodCallStructCallbackSkeleton() writes method call for wait invoke in skeleton
1942          */
1943         private void writeMethodCallStructCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl) {
1944
1945                 // Use this set to handle two same methodIds
1946                 for (String method : methods) {
1947
1948                         List<String> methParams = intDecl.getMethodParams(method);
1949                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
1950                         // Check for params with structs
1951                         for (int i = 0; i < methParams.size(); i++) {
1952                                 String paramType = methPrmTypes.get(i);
1953                                 String param = methParams.get(i);
1954                                 String simpleType = getSimpleType(paramType);
1955                                 if (isStructClass(simpleType)) {
1956                                         int methodNumId = intDecl.getMethodNumId(method);
1957                                         print("case ");
1958                                         String helperMethod = methodNumId + "struct" + i;
1959                                         String tempVar = "struct" + methodNumId + "Size" + i;
1960                                         print(intDecl.getHelperMethodNumId(helperMethod) + ": ");
1961                                         print(tempVar + " = ___");
1962                                         println(helperMethod + "(rmiObj); break;");
1963                                 }
1964                         }
1965                 }
1966         }
1967
1968
1969         /**
1970          * HELPER: writeJavaMethodPermission() writes permission checks in skeleton
1971          */
1972         private void writeJavaMethodPermission(String intface) {
1973
1974                 // Get all the different stubs
1975                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
1976                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
1977                         String newIntface = intMeth.getKey();
1978                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
1979                         println("if (_objectId == object" + newObjectId + "Id) {");
1980                         println("if (!set" + newObjectId + "Allowed.contains(methodId)) {");
1981                         println("throw new Error(\"Object with object Id: \" + _objectId + \"  is not allowed to access method: \" + methodId);");
1982                         println("}");
1983                         println("else {");
1984                         println("throw new Error(\"Object Id: \" + _objectId + \" not recognized!\");");
1985                         println("}");
1986                         println("}");
1987                 }
1988         }
1989
1990
1991         /**
1992          * HELPER: writeJavaWaitRequestInvokeMethod() writes the main loop of the skeleton class
1993          */
1994         private void writeJavaWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist, String intface) {
1995
1996                 // Use this set to handle two same methodIds
1997                 Set<String> uniqueMethodIds = new HashSet<String>();
1998                 println("private void ___waitRequestInvokeMethod() throws IOException {");
1999                 // Write variables here if we have callbacks or enums or structs
2000                 writeCountVarStructSkeleton(methods, intDecl);
2001                 println("while (true) {");
2002                 println("rmiObj.getMethodBytes();");
2003                 println("int _objectId = rmiObj.getObjectId();");
2004                 println("int methodId = rmiObj.getMethodId();");
2005                 // Generate permission check
2006                 writeJavaMethodPermission(intface);
2007                 println("switch (methodId) {");
2008                 // Print methods and method Ids
2009                 for (String method : methods) {
2010                         String methodId = intDecl.getMethodId(method);
2011                         int methodNumId = intDecl.getMethodNumId(method);
2012                         print("case " + methodNumId + ": ___");
2013                         String helperMethod = methodId;
2014                         if (uniqueMethodIds.contains(methodId))
2015                                 helperMethod = helperMethod + methodNumId;
2016                         else
2017                                 uniqueMethodIds.add(methodId);
2018                         print(helperMethod + "(");
2019                         writeInputCountVarStructSkeleton(method, intDecl);
2020                         println("); break;");
2021                 }
2022                 String method = "___initCallBack()";
2023                 // Print case -9999 (callback handler) if callback exists
2024                 if (callbackExist) {
2025                         int methodId = intDecl.getHelperMethodNumId(method);
2026                         println("case " + methodId + ": ___regCB(); break;");
2027                 }
2028                 writeMethodCallStructSkeleton(methods, intDecl);
2029                 println("default: ");
2030                 println("throw new Error(\"Method Id \" + methodId + \" not recognized!\");");
2031                 println("}");
2032                 println("}");
2033                 println("}\n");
2034         }
2035
2036
2037         /**
2038          * generateJavaSkeletonClass() generate skeletons based on the methods list in Java
2039          */
2040         public void generateJavaSkeletonClass() throws IOException {
2041
2042                 // Create a new directory
2043                 String path = createDirectories(dir, subdir);
2044                 for (String intface : mapIntfacePTH.keySet()) {
2045                         // Open a new file to write into
2046                         String newSkelClass = intface + "_Skeleton";
2047                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".java");
2048                         pw = new PrintWriter(new BufferedWriter(fw));
2049                         // Pass in set of methods and get import classes
2050                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2051                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2052                         List<String> methods = intDecl.getMethods();
2053                         Set<String> importClasses = getImportClasses(methods, intDecl);
2054                         List<String> stdImportClasses = getStandardJavaImportClasses();
2055                         List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
2056                         printImportStatements(allImportClasses);
2057                         // Find out if there are callback objects
2058                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
2059                         boolean callbackExist = !callbackClasses.isEmpty();
2060                         // Write class header
2061                         println("");
2062                         println("public class " + newSkelClass  + " implements " + intface + " {\n");
2063                         // Write properties
2064                         writePropertiesJavaSkeleton(intface, callbackExist, intDecl);
2065                         // Write constructor
2066                         writeConstructorJavaSkeleton(newSkelClass, intface);
2067                         // Write methods
2068                         writeMethodJavaSkeleton(methods, intDecl, callbackClasses, false);
2069                         // Write method helper
2070                         writeMethodHelperJavaSkeleton(methods, intDecl, callbackClasses);
2071                         // Write waitRequestInvokeMethod() - main loop
2072                         writeJavaWaitRequestInvokeMethod(methods, intDecl, callbackExist, intface);
2073                         println("}");
2074                         pw.close();
2075                         System.out.println("IoTCompiler: Generated skeleton class " + newSkelClass + ".java...");
2076                 }
2077         }
2078
2079
2080         /**
2081          * HELPER: writePropertiesJavaCallbackSkeleton() writes the properties of the callback skeleton class
2082          */
2083         private void writePropertiesJavaCallbackSkeleton(String intface, boolean callbackExist) {
2084
2085                 println("private " + intface + " mainObj;");
2086                 // For callback skeletons, this is its own object Id
2087                 println("private static int objectId = 0;");
2088                 // Callback
2089                 if (callbackExist) {
2090                         println("private static int objIdCnt = 0;");
2091                         println("private IoTRMICall rmiCall;");
2092                 }
2093                 println("\n");
2094         }
2095
2096
2097         /**
2098          * HELPER: writeConstructorJavaCallbackSkeleton() writes the constructor of the skeleton class
2099          */
2100         private void writeConstructorJavaCallbackSkeleton(String newSkelClass, String intface) {
2101
2102                 println("public " + newSkelClass + "(" + intface + " _mainObj, int _objectId) throws Exception {");
2103                 println("mainObj = _mainObj;");
2104                 println("objectId = _objectId;");
2105                 println("}\n");
2106         }
2107
2108
2109         /**
2110          * HELPER: writeMethodHelperJavaCallbackSkeleton() writes the method helper of the callback skeleton class
2111          */
2112         private void writeMethodHelperJavaCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
2113
2114                 // Use this set to handle two same methodIds
2115                 Set<String> uniqueMethodIds = new HashSet<String>();
2116                 for (String method : methods) {
2117
2118                         List<String> methParams = intDecl.getMethodParams(method);
2119                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2120                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
2121                                 String methodId = intDecl.getMethodId(method);
2122                                 print("public void ___");
2123                                 String helperMethod = methodId;
2124                                 if (uniqueMethodIds.contains(methodId))
2125                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
2126                                 else
2127                                         uniqueMethodIds.add(methodId);
2128                                 String retType = intDecl.getMethodType(method);
2129                                 print(helperMethod + "(");
2130                                 boolean begin = true;
2131                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
2132                                         String paramType = methPrmTypes.get(i);
2133                                         String param = methParams.get(i);
2134                                         String simpleType = getSimpleType(paramType);
2135                                         if (isStructClass(simpleType)) {
2136                                                 if (!begin) {   // Generate comma for not the beginning variable
2137                                                         print(", "); begin = false;
2138                                                 }
2139                                                 int methodNumId = intDecl.getMethodNumId(method);
2140                                                 print("int struct" + methodNumId + "Size" + i);
2141                                         }
2142                                 }
2143                                 // Check if this is "void"
2144                                 if (retType.equals("void"))
2145                                         println(", IoTRMIObject rmiObj) {");
2146                                 else
2147                                         println(", IoTRMIObject rmiObj) throws IOException {");
2148                                 writeMethodHelperStructJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
2149                                 println("}\n");
2150                         } else {
2151                                 String methodId = intDecl.getMethodId(method);
2152                                 print("public void ___");
2153                                 String helperMethod = methodId;
2154                                 if (uniqueMethodIds.contains(methodId))
2155                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
2156                                 else
2157                                         uniqueMethodIds.add(methodId);
2158                                 // Check if this is "void"
2159                                 String retType = intDecl.getMethodType(method);
2160                                 if (retType.equals("void"))
2161                                         println(helperMethod + "(IoTRMIObject rmiObj) {");
2162                                 else
2163                                         println(helperMethod + "(IoTRMIObject rmiObj) throws IOException {");
2164                                 // Now, write the helper body of skeleton!
2165                                 writeStdMethodHelperBodyJavaSkeleton(intDecl, methParams, methPrmTypes, method, callbackClasses);
2166                                 println("}\n");
2167                         }
2168                 }
2169                 // Write method helper for structs
2170                 writeMethodHelperStructSetupJavaCallbackSkeleton(methods, intDecl);
2171         }
2172
2173
2174         /**
2175          * HELPER: writeJavaCallbackWaitRequestInvokeMethod() writes the request invoke method of the callback skeleton class
2176          */
2177         private void writeJavaCallbackWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist) {
2178
2179                 // Use this set to handle two same methodIds
2180                 Set<String> uniqueMethodIds = new HashSet<String>();
2181                 println("public void invokeMethod(IoTRMIObject rmiObj) throws IOException {");
2182                 // Write variables here if we have callbacks or enums or structs
2183                 writeCountVarStructSkeleton(methods, intDecl);
2184                 // Write variables here if we have callbacks or enums or structs
2185                 println("int methodId = rmiObj.getMethodId();");
2186                 // TODO: code the permission check here!
2187                 println("switch (methodId) {");
2188                 // Print methods and method Ids
2189                 for (String method : methods) {
2190                         String methodId = intDecl.getMethodId(method);
2191                         int methodNumId = intDecl.getMethodNumId(method);
2192                         print("case " + methodNumId + ": ___");
2193                         String helperMethod = methodId;
2194                         if (uniqueMethodIds.contains(methodId))
2195                                 helperMethod = helperMethod + methodNumId;
2196                         else
2197                                 uniqueMethodIds.add(methodId);
2198                         print(helperMethod + "(");
2199                         if (writeInputCountVarStructSkeleton(method, intDecl))
2200                                 println(", rmiObj); break;");
2201                         else
2202                                 println("rmiObj); break;");
2203                 }
2204                 String method = "___initCallBack()";
2205                 // Print case -9999 (callback handler) if callback exists
2206                 if (callbackExist) {
2207                         int methodId = intDecl.getHelperMethodNumId(method);
2208                         println("case " + methodId + ": ___regCB(rmiObj); break;");
2209                 }
2210                 writeMethodCallStructCallbackSkeleton(methods, intDecl);
2211                 println("default: ");
2212                 println("throw new Error(\"Method Id \" + methodId + \" not recognized!\");");
2213                 println("}");
2214                 println("}\n");
2215         }
2216
2217
2218         /**
2219          * generateJavaCallbackSkeletonClass() generate callback skeletons based on the methods list in Java
2220          */
2221         public void generateJavaCallbackSkeletonClass() throws IOException {
2222
2223                 // Create a new directory
2224                 String path = createDirectories(dir, subdir);
2225                 for (String intface : mapIntfacePTH.keySet()) {
2226                         // Open a new file to write into
2227                         String newSkelClass = intface + "_CallbackSkeleton";
2228                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".java");
2229                         pw = new PrintWriter(new BufferedWriter(fw));
2230                         // Pass in set of methods and get import classes
2231                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2232                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2233                         List<String> methods = intDecl.getMethods();
2234                         Set<String> importClasses = getImportClasses(methods, intDecl);
2235                         List<String> stdImportClasses = getStandardJavaImportClasses();
2236                         List<String> allImportClasses = getAllLibClasses(stdImportClasses, importClasses);
2237                         printImportStatements(allImportClasses);
2238                         // Find out if there are callback objects
2239                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
2240                         boolean callbackExist = !callbackClasses.isEmpty();
2241                         // Write class header
2242                         println("");
2243                         println("public class " + newSkelClass  + " implements " + intface + " {\n");
2244                         // Write properties
2245                         writePropertiesJavaCallbackSkeleton(intface, callbackExist);
2246                         // Write constructor
2247                         writeConstructorJavaCallbackSkeleton(newSkelClass, intface);
2248                         // Write methods
2249                         writeMethodJavaSkeleton(methods, intDecl, callbackClasses, true);
2250                         // Write method helper
2251                         writeMethodHelperJavaCallbackSkeleton(methods, intDecl, callbackClasses);
2252                         // Write waitRequestInvokeMethod() - main loop
2253                         writeJavaCallbackWaitRequestInvokeMethod(methods, intDecl, callbackExist);
2254                         println("}");
2255                         pw.close();
2256                         System.out.println("IoTCompiler: Generated callback skeleton class " + newSkelClass + ".java...");
2257                 }
2258         }
2259
2260
2261         /**
2262          * HELPER: writeMethodCplusLocalInterface() writes the method of the local interface
2263          */
2264         private void writeMethodCplusLocalInterface(Collection<String> methods, InterfaceDecl intDecl) {
2265
2266                 for (String method : methods) {
2267
2268                         List<String> methParams = intDecl.getMethodParams(method);
2269                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2270                         print("virtual " + checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2271                                 intDecl.getMethodId(method) + "(");
2272                         for (int i = 0; i < methParams.size(); i++) {
2273                                 // Check for params with driver class types and exchange it
2274                                 //              with its remote interface
2275                                 String paramType = checkAndGetParamClass(methPrmTypes.get(i));
2276                                 paramType = checkAndGetCplusType(paramType);
2277                                 // Check for arrays - translate into vector in C++
2278                                 String paramComplete = checkAndGetCplusArray(paramType, methParams.get(i));
2279                                 print(paramComplete);
2280                                 // Check if this is the last element (don't print a comma)
2281                                 if (i != methParams.size() - 1) {
2282                                         print(", ");
2283                                 }
2284                         }
2285                         println(") = 0;");
2286                 }
2287         }
2288
2289
2290         /**
2291          * HELPER: writeMethodCplusInterface() writes the method of the interface
2292          */
2293         private void writeMethodCplusInterface(Collection<String> methods, InterfaceDecl intDecl) {
2294
2295                 for (String method : methods) {
2296
2297                         List<String> methParams = intDecl.getMethodParams(method);
2298                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2299                         print("virtual " + checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2300                                 intDecl.getMethodId(method) + "(");
2301                         for (int i = 0; i < methParams.size(); i++) {
2302                                 // Check for params with driver class types and exchange it
2303                                 //              with its remote interface
2304                                 String paramType = methPrmTypes.get(i);
2305                                 paramType = checkAndGetCplusType(paramType);
2306                                 // Check for arrays - translate into vector in C++
2307                                 String paramComplete = checkAndGetCplusArray(paramType, methParams.get(i));
2308                                 print(paramComplete);
2309                                 // Check if this is the last element (don't print a comma)
2310                                 if (i != methParams.size() - 1) {
2311                                         print(", ");
2312                                 }
2313                         }
2314                         println(") = 0;");
2315                 }
2316         }
2317
2318
2319         /**
2320          * HELPER: generateEnumCplus() writes the enumeration declaration
2321          */
2322         public void generateEnumCplus() throws IOException {
2323
2324                 // Create a new directory
2325                 createDirectory(dir);
2326                 for (String intface : mapIntfacePTH.keySet()) {
2327                         // Get the right StructDecl
2328                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2329                         EnumDecl enumDecl = (EnumDecl) decHandler.getEnumDecl(intface);
2330                         Set<String> enumTypes = enumDecl.getEnumDeclarations();
2331                         // Iterate over enum declarations
2332                         for (String enType : enumTypes) {
2333                                 // Open a new file to write into
2334                                 FileWriter fw = new FileWriter(dir + "/" + enType + ".hpp");
2335                                 pw = new PrintWriter(new BufferedWriter(fw));
2336                                 // Write file headers
2337                                 println("#ifndef _" + enType.toUpperCase() + "_HPP__");
2338                                 println("#define _" + enType.toUpperCase() + "_HPP__");
2339                                 println("enum " + enType + " {");
2340                                 List<String> enumMembers = enumDecl.getMembers(enType);
2341                                 for (int i = 0; i < enumMembers.size(); i++) {
2342
2343                                         String member = enumMembers.get(i);
2344                                         print(member);
2345                                         // Check if this is the last element (don't print a comma)
2346                                         if (i != enumMembers.size() - 1)
2347                                                 println(",");
2348                                         else
2349                                                 println("");
2350                                 }
2351                                 println("};\n");
2352                                 println("#endif");
2353                                 pw.close();
2354                                 System.out.println("IoTCompiler: Generated enum " + enType + ".hpp...");
2355                         }
2356                 }
2357         }
2358
2359
2360         /**
2361          * HELPER: generateStructCplus() writes the struct declaration
2362          */
2363         public void generateStructCplus() throws IOException {
2364
2365                 // Create a new directory
2366                 createDirectory(dir);
2367                 for (String intface : mapIntfacePTH.keySet()) {
2368                         // Get the right StructDecl
2369                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2370                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
2371                         List<String> structTypes = structDecl.getStructTypes();
2372                         // Iterate over enum declarations
2373                         for (String stType : structTypes) {
2374                                 // Open a new file to write into
2375                                 FileWriter fw = new FileWriter(dir + "/" + stType + ".hpp");
2376                                 pw = new PrintWriter(new BufferedWriter(fw));
2377                                 // Write file headers
2378                                 println("#ifndef _" + stType.toUpperCase() + "_HPP__");
2379                                 println("#define _" + stType.toUpperCase() + "_HPP__");
2380                                 println("struct " + stType + " {");
2381                                 List<String> structMemberTypes = structDecl.getMemberTypes(stType);
2382                                 List<String> structMembers = structDecl.getMembers(stType);
2383                                 for (int i = 0; i < structMembers.size(); i++) {
2384
2385                                         String memberType = structMemberTypes.get(i);
2386                                         String member = structMembers.get(i);
2387                                         String structTypeC = checkAndGetCplusType(memberType);
2388                                         String structComplete = checkAndGetCplusArray(structTypeC, member);
2389                                         println(structComplete + ";");
2390                                 }
2391                                 println("};\n");
2392                                 println("#endif");
2393                                 pw.close();
2394                                 System.out.println("IoTCompiler: Generated struct " + stType + ".hpp...");
2395                         }
2396                 }
2397         }
2398
2399
2400         /**
2401          * generateCplusLocalInterfaces() writes the local interfaces and provides type-checking.
2402          * <p>
2403          * It needs to rewrite and exchange USERDEFINED types in input parameters of stub
2404          * and original interfaces, e.g. exchange Camera and CameraWithVideoAndRecording.
2405          * The local interface has to be the input parameter for the stub and the stub
2406          * interface has to be the input parameter for the local class.
2407          */
2408         public void generateCplusLocalInterfaces() throws IOException {
2409
2410                 // Create a new directory
2411                 createDirectory(dir);
2412                 for (String intface : mapIntfacePTH.keySet()) {
2413                         // Open a new file to write into
2414                         FileWriter fw = new FileWriter(dir + "/" + intface + ".hpp");
2415                         pw = new PrintWriter(new BufferedWriter(fw));
2416                         // Write file headers
2417                         println("#ifndef _" + intface.toUpperCase() + "_HPP__");
2418                         println("#define _" + intface.toUpperCase() + "_HPP__");
2419                         println("#include <iostream>");
2420                         // Pass in set of methods and get include classes
2421                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2422                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2423                         List<String> methods = intDecl.getMethods();
2424                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
2425                         printIncludeStatements(includeClasses); println("");
2426                         println("using namespace std;\n");
2427                         //writeStructCplus(structDecl);
2428                         println("class " + intface); println("{");
2429                         println("public:");
2430                         // Write methods
2431                         writeMethodCplusLocalInterface(methods, intDecl);
2432                         println("};");
2433                         println("#endif");
2434                         pw.close();
2435                         System.out.println("IoTCompiler: Generated local interface " + intface + ".hpp...");
2436                 }
2437         }
2438
2439
2440         /**
2441          * generateCPlusInterfaces() generate stub interfaces based on the methods list in C++
2442          * <p>
2443          * For C++ we use virtual classe as interface
2444          */
2445         public void generateCPlusInterfaces() throws IOException {
2446
2447                 // Create a new directory
2448                 String path = createDirectories(dir, subdir);
2449                 for (String intface : mapIntfacePTH.keySet()) {
2450
2451                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
2452                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
2453
2454                                 // Open a new file to write into
2455                                 String newIntface = intMeth.getKey();
2456                                 FileWriter fw = new FileWriter(path + "/" + newIntface + ".hpp");
2457                                 pw = new PrintWriter(new BufferedWriter(fw));
2458                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
2459                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
2460                                 // Write file headers
2461                                 println("#ifndef _" + newIntface.toUpperCase() + "_HPP__");
2462                                 println("#define _" + newIntface.toUpperCase() + "_HPP__");
2463                                 println("#include <iostream>");
2464                                 // Pass in set of methods and get import classes
2465                                 Set<String> includeClasses = getIncludeClasses(intMeth.getValue(), intDecl, intface, false);
2466                                 List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
2467                                 List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
2468                                 printIncludeStatements(allIncludeClasses); println("");
2469                                 println("using namespace std;\n");
2470                                 println("class " + newIntface);
2471                                 println("{");
2472                                 println("public:");
2473                                 // Write methods
2474                                 writeMethodCplusInterface(intMeth.getValue(), intDecl);
2475                                 println("};");
2476                                 println("#endif");
2477                                 pw.close();
2478                                 System.out.println("IoTCompiler: Generated interface " + newIntface + ".hpp...");
2479                         }
2480                 }
2481         }
2482
2483
2484         /**
2485          * HELPER: writeMethodCplusStub() writes the methods of the stub
2486          */
2487         private void writeMethodCplusStub(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
2488
2489                 for (String method : methods) {
2490
2491                         List<String> methParams = intDecl.getMethodParams(method);
2492                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
2493                         print(checkAndGetCplusType(intDecl.getMethodType(method)) + " " +
2494                                 intDecl.getMethodId(method) + "(");
2495                         boolean isCallbackMethod = false;
2496                         String callbackType = null;
2497                         for (int i = 0; i < methParams.size(); i++) {
2498
2499                                 String paramType = methPrmTypes.get(i);
2500                                 // Check if this has callback object
2501                                 if (callbackClasses.contains(paramType)) {
2502                                         isCallbackMethod = true;
2503                                         callbackType = paramType;
2504                                         // Even if there're 2 callback arguments, we expect them to be of the same interface
2505                                 }
2506                                 String methPrmType = checkAndGetCplusType(methPrmTypes.get(i));
2507                                 String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
2508                                 print(methParamComplete);
2509                                 // Check if this is the last element (don't print a comma)
2510                                 if (i != methParams.size() - 1) {
2511                                         print(", ");
2512                                 }
2513                         }
2514                         println(") { ");
2515                         if (isCallbackMethod)
2516                                 writeCallbackMethodBodyCplusStub(intDecl, methParams, methPrmTypes, method, callbackType);
2517                         else
2518                                 writeStdMethodBodyCplusStub(intDecl, methParams, methPrmTypes, method);
2519                         println("}\n");
2520                         // Write the init callback helper method
2521                         if (isCallbackMethod) {
2522                                 writeInitCallbackCplusStub(callbackType, intDecl);
2523                                 writeInitCallbackSendInfoCplusStub(intDecl);
2524                         }
2525                 }
2526         }
2527
2528
2529         /**
2530          * HELPER: writeCallbackMethodBodyCplusStub() writes the callback method of the stub class
2531          */
2532         private void writeCallbackMethodBodyCplusStub(InterfaceDecl intDecl, List<String> methParams,
2533                         List<String> methPrmTypes, String method, String callbackType) {
2534
2535                 // Check if this is single object, array, or list of objects
2536                 boolean isArrayOrList = false;
2537                 String callbackParam = null;
2538                 for (int i = 0; i < methParams.size(); i++) {
2539
2540                         String paramType = methPrmTypes.get(i);
2541                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2542                                 String param = methParams.get(i);
2543                                 if (isArrayOrList(paramType, param)) {  // Generate loop
2544                                         println("for (" + paramType + "* cb : " + getSimpleIdentifier(param) + ") {");
2545                                         println(callbackType + "_CallbackSkeleton* skel = new " + callbackType + "_CallbackSkeleton(cb, objIdCnt++);");
2546                                         isArrayOrList = true;
2547                                         callbackParam = getSimpleIdentifier(param);
2548                                 } else
2549                                         println(callbackType + "_CallbackSkeleton* skel = new " + callbackType + "_CallbackSkeleton(" +
2550                                                 getSimpleIdentifier(param) + ", objIdCnt++);");
2551                                 println("vecCallbackObj.push_back(skel);");
2552                                 if (isArrayOrList(paramType, param))
2553                                         println("}");
2554                         }
2555                 }
2556                 println("int numParam = " + methParams.size() + ";");
2557                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
2558                 String retType = intDecl.getMethodType(method);
2559                 String retTypeC = checkAndGetCplusType(retType);
2560                 println("string retType = \"" + checkAndGetCplusArrayType(retTypeC) + "\";");
2561                 // Generate array of parameter types
2562                 print("string paramCls[] = { ");
2563                 for (int i = 0; i < methParams.size(); i++) {
2564                         String paramType = methPrmTypes.get(i);
2565                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2566                                 print("\"int\"");
2567                         } else { // Generate normal classes if it's not a callback object
2568                                 String paramTypeC = checkAndGetCplusType(methPrmTypes.get(i));
2569                                 String prmType = checkAndGetCplusArrayType(paramTypeC, methParams.get(i));
2570                                 print("\"" + prmType + "\"");
2571                         }
2572                         if (i != methParams.size() - 1) // Check if this is the last element
2573                                 print(", ");
2574                 }
2575                 println(" };");
2576                 print("int ___paramCB = ");
2577                 if (isArrayOrList)
2578                         println(callbackParam + ".size();");
2579                 else
2580                         println("1;");
2581                 // Generate array of parameter objects
2582                 print("void* paramObj[] = { ");
2583                 for (int i = 0; i < methParams.size(); i++) {
2584                         String paramType = methPrmTypes.get(i);
2585                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
2586                                 print("&___paramCB");
2587                         } else
2588                                 print(getSimpleIdentifier(methParams.get(i)));
2589                         if (i != methParams.size() - 1)
2590                                 print(", ");
2591                 }
2592                 println(" };");
2593                 // Check if this is "void"
2594                 if (retType.equals("void")) {
2595                         println("void* retObj = NULL;");
2596                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2597                 } else { // We do have a return value
2598                         if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2599                                 println(checkAndGetCplusType(retType) + " retVal;");
2600                         else
2601                                 println(checkAndGetCplusType(retType) + " retVal = " + generateCplusInitializer(retType) + ";");
2602                         println("void* retObj = &retVal;");
2603                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2604                         println("return retVal;");
2605                 }
2606         }
2607
2608
2609         /**
2610          * HELPER: checkAndWriteEnumTypeCplusStub() writes the enum type (convert from enum to int)
2611          */
2612         private void checkAndWriteEnumTypeCplusStub(List<String> methParams, List<String> methPrmTypes) {
2613
2614                 // Iterate and find enum declarations
2615                 for (int i = 0; i < methParams.size(); i++) {
2616                         String paramType = methPrmTypes.get(i);
2617                         String param = methParams.get(i);
2618                         String simpleType = getSimpleType(paramType);
2619                         if (isEnumClass(simpleType)) {
2620                         // Check if this is enum type
2621                                 if (isArrayOrList(paramType, param)) {  // An array or vector
2622                                         println("int len" + i + " = " + param + ".size();");
2623                                         println("vector<int> paramEnum" + i + "(len);");
2624                                         println("for (int i = 0; i < len" + i + "; i++) {");
2625                                         println("paramEnum" + i + "[i] = (int) " + param + "[i];");
2626                                         println("}");
2627                                 } else {        // Just one element
2628                                         println("vector<int> paramEnum" + i + "(1);");
2629                                         println("paramEnum" + i + "[0] = (int) " + param + ";");
2630                                 }
2631                         }
2632                 }
2633         }
2634
2635
2636         /**
2637          * HELPER: checkAndWriteEnumRetTypeCplusStub() writes the enum return type (convert from enum to int)
2638          */
2639         private void checkAndWriteEnumRetTypeCplusStub(String retType) {
2640
2641                 // Strips off array "[]" for return type
2642                 String pureType = getSimpleArrayType(getSimpleType(retType));
2643                 // Take the inner type of generic
2644                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2645                         pureType = getTypeOfGeneric(retType)[0];
2646                 if (isEnumClass(pureType)) {
2647                 // Check if this is enum type
2648                         println("vector<int> retEnumInt;");
2649                         println("void* retObj = &retEnumInt;");
2650                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2651                         if (isArrayOrList(retType, retType)) {  // An array or vector
2652                                 println("int retLen = retEnumInt.size();");
2653                                 println("vector<" + pureType + "> retVal(retLen);");
2654                                 println("for (int i = 0; i < retLen; i++) {");
2655                                 println("retVal[i] = (" + pureType + ") retEnumInt[i];");
2656                                 println("}");
2657                         } else {        // Just one element
2658                                 println(pureType + " retVal = (" + pureType + ") retEnumInt[0];");
2659                         }
2660                         println("return retVal;");
2661                 }
2662         }
2663
2664
2665         /**
2666          * HELPER: checkAndWriteStructSetupCplusStub() writes the struct type setup
2667          */
2668         private void checkAndWriteStructSetupCplusStub(List<String> methParams, List<String> methPrmTypes,
2669                         InterfaceDecl intDecl, String method) {
2670
2671                 // Iterate and find struct declarations
2672                 for (int i = 0; i < methParams.size(); i++) {
2673                         String paramType = methPrmTypes.get(i);
2674                         String param = methParams.get(i);
2675                         String simpleType = getSimpleType(paramType);
2676                         if (isStructClass(simpleType)) {
2677                         // Check if this is enum type
2678                                 println("int numParam" + i + " = 1;");
2679                                 int methodNumId = intDecl.getMethodNumId(method);
2680                                 String helperMethod = methodNumId + "struct" + i;
2681                                 println("int methodIdStruct" + i + " = " + intDecl.getHelperMethodNumId(helperMethod) + ";");
2682                                 println("string retTypeStruct" + i + " = \"void\";");
2683                                 println("string paramClsStruct" + i + "[] = { \"int\" };");
2684                                 print("int structLen" + i + " = ");
2685                                 if (isArrayOrList(param, paramType)) {  // An array
2686                                         println(getSimpleArrayType(param) + ".size();");
2687                                 } else {        // Just one element
2688                                         println("1;");
2689                                 }
2690                                 println("void* paramObjStruct" + i + "[] = { &structLen" + i + " };");
2691                                 println("void* retStructLen" + i + " = NULL;");
2692                                 println("rmiCall->remoteCall(objectId, methodIdStruct" + i +
2693                                                 ", retTypeStruct" + i + ", paramClsStruct" + i + ", paramObjStruct" + i +
2694                                                 ", numParam" + i + ", retStructLen" + i + ");\n");
2695                         }
2696                 }
2697         }
2698
2699
2700         /**
2701          * HELPER: writeLengthStructParamClassCplusStub() writes lengths of params
2702          */
2703         private void writeLengthStructParamClassCplusStub(List<String> methParams, List<String> methPrmTypes) {
2704
2705                 // Iterate and find struct declarations - count number of params
2706                 for (int i = 0; i < methParams.size(); i++) {
2707                         String paramType = methPrmTypes.get(i);
2708                         String param = methParams.get(i);
2709                         String simpleType = getGenericType(paramType);
2710                         if (isStructClass(simpleType)) {
2711                                 int members = getNumOfMembers(simpleType);
2712                                 if (isArrayOrList(param, paramType)) {                  // An array
2713                                         String structLen = param + ".size()";
2714                                         print(members + "*" + structLen);
2715                                 } else
2716                                         print(Integer.toString(members));
2717                         } else
2718                                 print("1");
2719                         if (i != methParams.size() - 1) {
2720                                 print("+");
2721                         }
2722                 }
2723         }
2724
2725
2726         /**
2727          * HELPER: writeStructMembersCplusStub() writes member parameters of struct
2728          */
2729         private void writeStructMembersCplusStub(String simpleType, String paramType, String param) {
2730
2731                 // Get the struct declaration for this struct and generate initialization code
2732                 StructDecl structDecl = getStructDecl(simpleType);
2733                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2734                 List<String> members = structDecl.getMembers(simpleType);
2735                 if (isArrayOrList(param, paramType)) {  // An array or list
2736                         println("for(int i = 0; i < " + param + ".size(); i++) {");
2737                 }
2738                 if (isArrayOrList(param, paramType)) {  // An array or list
2739                         for (int i = 0; i < members.size(); i++) {
2740                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2741                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2742                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2743                                 print("paramObj[pos++] = &" + param + "[i].");
2744                                 print(getSimpleIdentifier(members.get(i)));
2745                                 println(";");
2746                         }
2747                         println("}");
2748                 } else {        // Just one struct element
2749                         for (int i = 0; i < members.size(); i++) {
2750                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2751                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2752                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2753                                 print("paramObj[pos++] = &" + param + ".");
2754                                 print(getSimpleIdentifier(members.get(i)));
2755                                 println(";");
2756                         }
2757                 }
2758         }
2759
2760
2761         /**
2762          * HELPER: writeStructParamClassCplusStub() writes member parameters of struct
2763          */
2764         private void writeStructParamClassCplusStub(List<String> methParams, List<String> methPrmTypes) {
2765
2766                 print("int numParam = ");
2767                 writeLengthStructParamClassCplusStub(methParams, methPrmTypes);
2768                 println(";");
2769                 println("void* paramObj[numParam];");
2770                 println("string paramCls[numParam];");
2771                 println("int pos = 0;");
2772                 // Iterate again over the parameters
2773                 for (int i = 0; i < methParams.size(); i++) {
2774                         String paramType = methPrmTypes.get(i);
2775                         String param = methParams.get(i);
2776                         String simpleType = getGenericType(paramType);
2777                         if (isStructClass(simpleType)) {
2778                                 writeStructMembersCplusStub(simpleType, paramType, param);
2779                         } else {
2780                                 String prmTypeC = checkAndGetCplusType(methPrmTypes.get(i));
2781                                 String prmType = checkAndGetCplusArrayType(prmTypeC, methParams.get(i));
2782                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2783                                 print("paramObj[pos++] = &");
2784                                 print(getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
2785                                 println(";");
2786                         }
2787                 }
2788
2789         }
2790
2791
2792         /**
2793          * HELPER: writeStructRetMembersCplusStub() writes member parameters of struct for return statement
2794          */
2795         private void writeStructRetMembersCplusStub(String simpleType, String retType) {
2796
2797                 // Get the struct declaration for this struct and generate initialization code
2798                 StructDecl structDecl = getStructDecl(simpleType);
2799                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2800                 List<String> members = structDecl.getMembers(simpleType);
2801                 if (isArrayOrList(retType, retType)) {  // An array or list
2802                         println("for(int i = 0; i < retLen; i++) {");
2803                 }
2804                 if (isArrayOrList(retType, retType)) {  // An array or list
2805                         for (int i = 0; i < members.size(); i++) {
2806                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
2807                                 print("structRet[i]." + getSimpleIdentifier(members.get(i)));
2808                                 println(" = retParam" + i + "[i];");
2809                         }
2810                         println("}");
2811                 } else {        // Just one struct element
2812                         for (int i = 0; i < members.size(); i++) {
2813                                 String prmType = checkAndGetArray(memTypes.get(i), members.get(i));
2814                                 print("structRet." + getSimpleIdentifier(members.get(i)));
2815                                 println(" = retParam" + i + ";");
2816                         }
2817                 }
2818                 println("return structRet;");
2819         }
2820
2821
2822         /**
2823          * HELPER: writeStructReturnCplusStub() writes member parameters of struct for return statement
2824          */
2825         private void writeStructReturnCplusStub(String simpleType, String retType) {
2826
2827                 // Minimum retLen is 1 if this is a single struct object
2828                 println("int retLen = 0;");
2829                 println("void* retLenObj = { &retLen };");
2830                 // Handle the returned struct!!!
2831                 println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retLenObj);");
2832                 int numMem = getNumOfMembers(simpleType);
2833                 println("int numRet = " + numMem + "*retLen;");
2834                 println("string retCls[numRet];");
2835                 println("void* retObj[numRet];");
2836                 StructDecl structDecl = getStructDecl(simpleType);
2837                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
2838                 List<String> members = structDecl.getMembers(simpleType);
2839                 // Set up variables
2840                 if (isArrayOrList(retType, retType)) {  // An array or list
2841                         for (int i = 0; i < members.size(); i++) {
2842                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2843                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2844                                 println(getSimpleType(getEnumType(prmType)) + " retParam" + i + "[retLen];");
2845                         }
2846                 } else {        // Just one struct element
2847                         for (int i = 0; i < members.size(); i++) {
2848                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2849                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2850                                 println(getSimpleType(getEnumType(prmType)) + " retParam" + i + ";");
2851                         }
2852                 }
2853                 println("int retPos = 0;");
2854                 // Get the struct declaration for this struct and generate initialization code
2855                 if (isArrayOrList(retType, retType)) {  // An array or list
2856                         println("for(int i = 0; i < retLen; i++) {");
2857                         for (int i = 0; i < members.size(); i++) {
2858                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2859                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2860                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2861                                 println("retObj[retPos++] = &retParam" + i + "[i];");
2862                         }
2863                         println("}");
2864                 } else {        // Just one struct element
2865                         for (int i = 0; i < members.size(); i++) {
2866                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
2867                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
2868                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
2869                                 println("retObj[retPos++] = &retParam" + i + ";");
2870                         }
2871                 }
2872                 println("rmiCall->getStructObjects(retCls, numRet, retObj);");
2873                 if (isArrayOrList(retType, retType)) {  // An array or list
2874                         println("vector<" + simpleType + "> structRet(retLen);");
2875                 } else
2876                         println(simpleType + " structRet;");
2877                 writeStructRetMembersCplusStub(simpleType, retType);
2878         }
2879
2880
2881         /**
2882          * HELPER: writeStdMethodBodyCplusStub() writes the standard method body in the stub class
2883          */
2884         private void writeStdMethodBodyCplusStub(InterfaceDecl intDecl, List<String> methParams,
2885                         List<String> methPrmTypes, String method) {
2886
2887                 checkAndWriteStructSetupCplusStub(methParams, methPrmTypes, intDecl, method);
2888                 println("int methodId = " + intDecl.getMethodNumId(method) + ";");
2889                 String retType = intDecl.getMethodType(method);
2890                 String retTypeC = checkAndGetCplusType(retType);
2891                 println("string retType = \"" + checkAndGetCplusArrayType(getStructType(getEnumType(retTypeC))) + "\";");
2892                 // Generate array of parameter types
2893                 if (isStructPresent(methParams, methPrmTypes)) {
2894                         writeStructParamClassCplusStub(methParams, methPrmTypes);
2895                 } else {
2896                         println("int numParam = " + methParams.size() + ";");
2897                         print("string paramCls[] = { ");
2898                         for (int i = 0; i < methParams.size(); i++) {
2899                                 String paramTypeC = checkAndGetCplusType(methPrmTypes.get(i));
2900                                 String paramType = checkAndGetCplusArrayType(paramTypeC, methParams.get(i));
2901                                 print("\"" + getEnumType(paramType) + "\"");
2902                                 // Check if this is the last element (don't print a comma)
2903                                 if (i != methParams.size() - 1) {
2904                                         print(", ");
2905                                 }
2906                         }
2907                         println(" };");
2908                         checkAndWriteEnumTypeCplusStub(methParams, methPrmTypes);
2909                         // Generate array of parameter objects
2910                         print("void* paramObj[] = { ");
2911                         for (int i = 0; i < methParams.size(); i++) {
2912                                 print("&" + getEnumParam(methPrmTypes.get(i), getSimpleIdentifier(methParams.get(i)), i));
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                 }
2920                 // Check if this is "void"
2921                 if (retType.equals("void")) {
2922                         println("void* retObj = NULL;");
2923                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2924                 } else { // We do have a return value
2925                         // Generate array of parameter types
2926                         if (isStructClass(getGenericType(getSimpleArrayType(retType)))) {
2927                                 writeStructReturnCplusStub(getGenericType(getSimpleArrayType(retType)), retType);
2928                         } else {
2929                         // Check if the return value NONPRIMITIVES
2930                                 if (getParamCategory(retType) == ParamCategory.ENUM) {
2931                                         checkAndWriteEnumRetTypeCplusStub(retType);
2932                                 } else {
2933                                         if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
2934                                                 println(checkAndGetCplusType(retType) + " retVal;");
2935                                         else
2936                                                 println(checkAndGetCplusType(retType) + " retVal = " + generateCplusInitializer(retType) + ";");
2937                                         println("void* retObj = &retVal;");
2938                                         println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
2939                                         println("return retVal;");
2940                                 }
2941                         }
2942                 }
2943         }
2944
2945
2946         /**
2947          * HELPER: writePropertiesCplusStub() writes the properties of the stub class
2948          */
2949         private void writePropertiesCplusPermission(String intface) {
2950
2951                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
2952                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
2953                         String newIntface = intMeth.getKey();
2954                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
2955                         println("const static int object" + newObjectId + "Id = " + newObjectId + ";");
2956                         println("const static set<int> set" + newObjectId + "Allowed;");
2957                 }
2958         }
2959
2960         /**
2961          * HELPER: writePropertiesCplusStub() writes the properties of the stub class
2962          */
2963         private void writePropertiesCplusStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
2964
2965                 println("IoTRMICall *rmiCall;");
2966                 //println("IoTRMIObject\t\t\t*rmiObj;");
2967                 println("string address;");
2968                 println("vector<int> ports;\n");
2969                 // Get the object Id
2970                 Integer objId = mapIntfaceObjId.get(intface);
2971                 println("const static int objectId = " + objId + ";");
2972                 mapNewIntfaceObjId.put(newIntface, objId);
2973                 mapIntfaceObjId.put(intface, objId++);
2974                 if (callbackExist) {
2975                 // We assume that each class only has one callback interface for now
2976                         Iterator it = callbackClasses.iterator();
2977                         String callbackType = (String) it.next();
2978                         println("// Callback properties");
2979                         println("IoTRMIObject *rmiObj;");
2980                         println("vector<" + callbackType + "*> vecCallbackObj;");
2981                         println("static int objIdCnt;");
2982                         // Generate permission stuff for callback stubs
2983                         writePropertiesCplusPermission(callbackType);
2984                 }
2985                 println("\n");
2986         }
2987
2988
2989         /**
2990          * HELPER: writeConstructorCplusStub() writes the constructor of the stub class
2991          */
2992         private void writeConstructorCplusStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
2993
2994                 println(newStubClass +
2995                         "(int _port, const char* _address, int _rev, bool* _bResult, vector<int> _ports) {");
2996                 println("address = _address;");
2997                 println("ports = _ports;");
2998                 println("rmiCall = new IoTRMICall(_port, _address, _rev, _bResult);");
2999                 if (callbackExist) {
3000                         println("objIdCnt = 0;");
3001                         Iterator it = callbackClasses.iterator();
3002                         String callbackType = (String) it.next();
3003                         println("thread th1 (&" + newStubClass + "::___initCallBack, this);");
3004                         println("th1.detach();");
3005                         println("___regCB();");
3006                 }
3007                 println("}\n");
3008         }
3009
3010
3011         /**
3012          * HELPER: writeDeconstructorCplusStub() writes the deconstructor of the stub class
3013          */
3014         private void writeDeconstructorCplusStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
3015
3016                 println("~" + newStubClass + "() {");
3017                 println("if (rmiCall != NULL) {");
3018                 println("delete rmiCall;");
3019                 println("rmiCall = NULL;");
3020                 println("}");
3021                 if (callbackExist) {
3022                 // We assume that each class only has one callback interface for now
3023                         println("if (rmiObj != NULL) {");
3024                         println("delete rmiObj;");
3025                         println("rmiObj = NULL;");
3026                         println("}");
3027                         Iterator it = callbackClasses.iterator();
3028                         String callbackType = (String) it.next();
3029                         println("for(" + callbackType + "* cb : vecCallbackObj) {");
3030                         println("delete cb;");
3031                         println("cb = NULL;");
3032                         println("}");
3033                 }
3034                 println("}");
3035                 println("");
3036         }
3037
3038
3039         /**
3040          * HELPER: writeCplusMethodCallbackPermission() writes permission checks in stub for callbacks
3041          */
3042         private void writeCplusMethodCallbackPermission(String intface) {
3043
3044                 println("int methodId = IoTRMIObject::getMethodId(method);");
3045                 // Get all the different stubs
3046                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3047                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3048                         String newIntface = intMeth.getKey();
3049                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
3050                         println("if (set" + newObjectId + "Allowed.find(methodId) == set" + newObjectId + "Allowed.end()) {");
3051                         println("cerr << \"Callback object for " + intface + " is not allowed to access method: \" << methodId;");
3052                         println("exit(-1);");
3053                         println("}");
3054                 }
3055         }
3056
3057
3058         /**
3059          * HELPER: writeInitCallbackCplusStub() writes the initialization of callback
3060          */
3061         private void writeInitCallbackCplusStub(String intface, InterfaceDecl intDecl) {
3062
3063                 println("void ___initCallBack() {");
3064                 println("bool bResult = false;");
3065                 println("rmiObj = new IoTRMIObject(ports[0], &bResult);");
3066                 println("while (true) {");
3067                 println("char* method = rmiObj->getMethodBytes();");
3068                 writeCplusMethodCallbackPermission(intface);
3069                 println("int objId = IoTRMIObject::getObjectId(method);");
3070                 println("if (objId < vecCallbackObj.size()) {   // Check if still within range");
3071                 println(intface + "_CallbackSkeleton* skel = dynamic_cast<" + intface +
3072                         "_CallbackSkeleton*> (vecCallbackObj.at(objId));");
3073                 println("skel->invokeMethod(rmiObj);");
3074                 println("} else {");
3075                 println("cerr << \"Illegal object Id: \" << to_string(objId);");
3076                 // TODO: perhaps need to change this into "throw" to make it cleaner (allow stack unfolding)
3077                 println("exit(-1);");
3078                 println("}");
3079                 println("}");
3080                 println("}\n");
3081         }
3082
3083
3084         /**
3085          * HELPER: writeInitCallbackSendInfoCplusStub() writes the initialization (send info part) of callback
3086          */
3087         private void writeInitCallbackSendInfoCplusStub(InterfaceDecl intDecl) {
3088
3089                 // Generate info sending part
3090                 println("void ___regCB() {");
3091                 println("int numParam = 3;");
3092                 String method = "___initCallBack()";
3093                 println("int methodId = " + intDecl.getHelperMethodNumId(method) + ";");
3094                 println("string retType = \"void\";");
3095                 println("string paramCls[] = { \"int\", \"string\", \"int\" };");
3096                 println("int rev = 0;");
3097                 println("void* paramObj[] = { &ports[0], &address, &rev };");
3098                 println("void* retObj = NULL;");
3099                 println("rmiCall->remoteCall(objectId, methodId, retType, paramCls, paramObj, numParam, retObj);");
3100                 println("}\n");
3101         }
3102
3103
3104         /**
3105          * generateCPlusStubClasses() generate stubs based on the methods list in C++
3106          */
3107         public void generateCPlusStubClasses() throws IOException {
3108
3109                 // Create a new directory
3110                 String path = createDirectories(dir, subdir);
3111                 for (String intface : mapIntfacePTH.keySet()) {
3112
3113                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3114                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3115                                 // Open a new file to write into
3116                                 String newIntface = intMeth.getKey();
3117                                 String newStubClass = newIntface + "_Stub";
3118                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".hpp");
3119                                 pw = new PrintWriter(new BufferedWriter(fw));
3120                                 // Write file headers
3121                                 println("#ifndef _" + newStubClass.toUpperCase() + "_HPP__");
3122                                 println("#define _" + newStubClass.toUpperCase() + "_HPP__");
3123                                 println("#include <iostream>");
3124                                 // Find out if there are callback objects
3125                                 Set<String> methods = intMeth.getValue();
3126                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
3127                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
3128                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
3129                                 boolean callbackExist = !callbackClasses.isEmpty();
3130                                 if (callbackExist)      // Need thread library if this has callback
3131                                         println("#include <thread>");
3132                                 println("#include \"" + newIntface + ".hpp\""); println("");
3133                                 println("using namespace std;"); println("");
3134                                 println("class " + newStubClass + " : public " + newIntface); println("{");
3135                                 println("private:\n");
3136                                 writePropertiesCplusStub(intface, newIntface, callbackExist, callbackClasses);
3137                                 println("public:\n");
3138                                 // Add default constructor and destructor
3139                                 println(newStubClass + "() { }"); println("");
3140                                 writeConstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3141                                 writeDeconstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3142                                 // Write methods
3143                                 writeMethodCplusStub(methods, intDecl, callbackClasses);
3144                                 print("}"); println(";");
3145                                 if (callbackExist)
3146                                         writePermissionInitializationCplus(intface, newStubClass, intDecl);
3147                                 println("#endif");
3148                                 pw.close();
3149                                 System.out.println("IoTCompiler: Generated stub class " + newStubClass + ".hpp...");
3150                         }
3151                 }
3152         }
3153
3154
3155         /**
3156          * HELPER: writePropertiesCplusCallbackStub() writes the properties of the stub class
3157          */
3158         private void writePropertiesCplusCallbackStub(String intface, String newIntface, boolean callbackExist, Set<String> callbackClasses) {
3159
3160                 println("IoTRMICall *rmiCall;");
3161                 // Get the object Id
3162                 println("static int objectId;");
3163                 if (callbackExist) {
3164                 // We assume that each class only has one callback interface for now
3165                         Iterator it = callbackClasses.iterator();
3166                         String callbackType = (String) it.next();
3167                         println("// Callback properties");
3168                         println("IoTRMIObject *rmiObj;");
3169                         println("vector<" + callbackType + "*> vecCallbackObj;");
3170                         println("static int objIdCnt;");
3171                         // TODO: Need to initialize address and ports if we want to have callback-in-callback
3172                         println("string address;");
3173                         println("vector<int> ports;\n");
3174                         writePropertiesCplusPermission(callbackType);
3175                 }
3176                 println("\n");
3177         }
3178
3179
3180         /**
3181          * HELPER: writeConstructorCplusCallbackStub() writes the constructor of the stub class
3182          */
3183         private void writeConstructorCplusCallbackStub(String newStubClass, boolean callbackExist, Set<String> callbackClasses) {
3184
3185                 println(newStubClass + "(IoTRMICall* _rmiCall, int _objectId) {");
3186                 println("objectId = _objectId;");
3187                 println("rmiCall = _rmiCall;");
3188                 if (callbackExist) {
3189                         Iterator it = callbackClasses.iterator();
3190                         String callbackType = (String) it.next();
3191                         println("thread th1 (&" + newStubClass + "::___initCallBack, this);");
3192                         println("th1.detach();");
3193                         println("___regCB();");
3194                 }
3195                 println("}\n");
3196         }
3197
3198
3199         /**
3200          * generateCPlusCallbackStubClasses() generate callback stubs based on the methods list in C++
3201          */
3202         public void generateCPlusCallbackStubClasses() throws IOException {
3203
3204                 // Create a new directory
3205                 String path = createDirectories(dir, subdir);
3206                 for (String intface : mapIntfacePTH.keySet()) {
3207
3208                         Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3209                         for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3210                                 // Open a new file to write into
3211                                 String newIntface = intMeth.getKey();
3212                                 String newStubClass = newIntface + "_CallbackStub";
3213                                 FileWriter fw = new FileWriter(path + "/" + newStubClass + ".hpp");
3214                                 pw = new PrintWriter(new BufferedWriter(fw));
3215                                 // Find out if there are callback objects
3216                                 Set<String> methods = intMeth.getValue();
3217                                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
3218                                 InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
3219                                 Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
3220                                 boolean callbackExist = !callbackClasses.isEmpty();
3221                                 // Write file headers
3222                                 println("#ifndef _" + newStubClass.toUpperCase() + "_HPP__");
3223                                 println("#define _" + newStubClass.toUpperCase() + "_HPP__");
3224                                 println("#include <iostream>");
3225                                 if (callbackExist)
3226                                         println("#include <thread>");
3227                                 println("#include \"" + newIntface + ".hpp\""); println("");
3228                                 println("using namespace std;"); println("");
3229                                 println("class " + newStubClass + " : public " + newIntface); println("{");
3230                                 println("private:\n");
3231                                 writePropertiesCplusCallbackStub(intface, newIntface, callbackExist, callbackClasses);
3232                                 println("public:\n");
3233                                 // Add default constructor and destructor
3234                                 println(newStubClass + "() { }"); println("");
3235                                 writeConstructorCplusCallbackStub(newStubClass, callbackExist, callbackClasses);
3236                                 writeDeconstructorCplusStub(newStubClass, callbackExist, callbackClasses);
3237                                 // Write methods
3238                                 writeMethodCplusStub(methods, intDecl, callbackClasses);
3239                                 println("};");
3240                                 if (callbackExist)
3241                                         writePermissionInitializationCplus(intface, newStubClass, intDecl);
3242                                 println("#endif");
3243                                 pw.close();
3244                                 System.out.println("IoTCompiler: Generated callback stub class " + newIntface + ".hpp...");
3245                         }
3246                 }
3247         }
3248
3249
3250         /**
3251          * HELPER: writePropertiesCplusSkeleton() writes the properties of the skeleton class
3252          */
3253         private void writePropertiesCplusSkeleton(String intface, boolean callbackExist, Set<String> callbackClasses) {
3254
3255                 println(intface + " *mainObj;");
3256                 // Callback
3257                 if (callbackExist) {
3258                         Iterator it = callbackClasses.iterator();
3259                         String callbackType = (String) it.next();
3260                         String exchangeType = checkAndGetParamClass(callbackType);
3261                         println("// Callback properties");
3262                         println("static int objIdCnt;");
3263                         println("vector<" + exchangeType + "*> vecCallbackObj;");
3264                         println("IoTRMICall *rmiCall;");
3265                 }
3266                 println("IoTRMIObject *rmiObj;\n");
3267                 // Keep track of object Ids of all stubs registered to this interface
3268                 writePropertiesCplusPermission(intface);
3269                 println("\n");
3270         }
3271
3272
3273         /**
3274          * HELPER: writePermissionInitializationCplus() writes the initialization of permission set
3275          */
3276         private void writePermissionInitializationCplus(String intface, String newSkelClass, InterfaceDecl intDecl) {
3277
3278                 // Keep track of object Ids of all stubs registered to this interface
3279                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3280                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3281                         String newIntface = intMeth.getKey();
3282                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
3283                         print("const set<int> " + newSkelClass + "::set" + newObjectId + "Allowed {");
3284                         Set<String> methodIds = intMeth.getValue();
3285                         int i = 0;
3286                         for (String methodId : methodIds) {
3287                                 int methodNumId = intDecl.getMethodNumId(methodId);
3288                                 print(Integer.toString(methodNumId));
3289                                 // Check if this is the last element (don't print a comma)
3290                                 if (i != methodIds.size() - 1) {
3291                                         print(", ");
3292                                 }
3293                                 i++;
3294                         }
3295                         println(" };");
3296                 }
3297         }
3298
3299
3300         /**
3301          * HELPER: writeConstructorCplusSkeleton() writes the constructor of the skeleton class
3302          */
3303         private void writeConstructorCplusSkeleton(String newSkelClass, String intface, boolean callbackExist) {
3304
3305                 println(newSkelClass + "(" + intface + " *_mainObj, int _port) {");
3306                 println("bool _bResult = false;");
3307                 println("mainObj = _mainObj;");
3308                 println("rmiObj = new IoTRMIObject(_port, &_bResult);");
3309                 // Callback
3310                 if (callbackExist) {
3311                         println("objIdCnt = 0;");
3312                 }
3313                 //println("set0Allowed = Arrays.asList(object0Permission);");
3314                 println("___waitRequestInvokeMethod();");
3315                 println("}\n");
3316         }
3317
3318
3319         /**
3320          * HELPER: writeDeconstructorCplusSkeleton() writes the deconstructor of the skeleton class
3321          */
3322         private void writeDeconstructorCplusSkeleton(String newSkelClass, boolean callbackExist, Set<String> callbackClasses) {
3323
3324                 println("~" + newSkelClass + "() {");
3325                 println("if (rmiObj != NULL) {");
3326                 println("delete rmiObj;");
3327                 println("rmiObj = NULL;");
3328                 println("}");
3329                 if (callbackExist) {
3330                 // We assume that each class only has one callback interface for now
3331                         println("if (rmiCall != NULL) {");
3332                         println("delete rmiCall;");
3333                         println("rmiCall = NULL;");
3334                         println("}");
3335                         Iterator it = callbackClasses.iterator();
3336                         String callbackType = (String) it.next();
3337                         String exchangeType = checkAndGetParamClass(callbackType);
3338                         println("for(" + exchangeType + "* cb : vecCallbackObj) {");
3339                         println("delete cb;");
3340                         println("cb = NULL;");
3341                         println("}");
3342                 }
3343                 println("}");
3344                 println("");
3345         }
3346
3347
3348         /**
3349          * HELPER: writeStdMethodBodyCplusSkeleton() writes the standard method body in the skeleton class
3350          */
3351         private void writeStdMethodBodyCplusSkeleton(List<String> methParams, String methodId, String methodType) {
3352
3353                 if (methodType.equals("void"))
3354                         print("mainObj->" + methodId + "(");
3355                 else
3356                         print("return mainObj->" + methodId + "(");
3357                 for (int i = 0; i < methParams.size(); i++) {
3358
3359                         print(getSimpleIdentifier(methParams.get(i)));
3360                         // Check if this is the last element (don't print a comma)
3361                         if (i != methParams.size() - 1) {
3362                                 print(", ");
3363                         }
3364                 }
3365                 println(");");
3366         }
3367
3368
3369         /**
3370          * HELPER: writeInitCallbackCplusSkeleton() writes the init callback method for skeleton class
3371          */
3372         private void writeInitCallbackCplusSkeleton(boolean callbackSkeleton) {
3373
3374                 // This is a callback skeleton generation
3375                 if (callbackSkeleton)
3376                         println("void ___regCB(IoTRMIObject* rmiObj) {");
3377                 else
3378                         println("void ___regCB() {");
3379                 println("int numParam = 3;");
3380                 println("int param1 = 0;");
3381                 println("string param2 = \"\";");
3382                 println("int param3 = 0;");
3383                 println("void* paramObj[] = { &param1, &param2, &param3 };");
3384                 println("bool bResult = false;");
3385                 println("rmiCall = new IoTRMICall(param1, param2.c_str(), param3, &bResult);");
3386                 println("}\n");
3387         }
3388
3389
3390         /**
3391          * HELPER: writeMethodCplusSkeleton() writes the method of the skeleton class
3392          */
3393         private void writeMethodCplusSkeleton(Collection<String> methods, InterfaceDecl intDecl,
3394                         Set<String> callbackClasses, boolean callbackSkeleton) {
3395
3396                 for (String method : methods) {
3397
3398                         List<String> methParams = intDecl.getMethodParams(method);
3399                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3400                         String methodId = intDecl.getMethodId(method);
3401                         String methodType = checkAndGetCplusType(intDecl.getMethodType(method));
3402                         print(methodType + " " + methodId + "(");
3403                         boolean isCallbackMethod = false;
3404                         String callbackType = null;
3405                         for (int i = 0; i < methParams.size(); i++) {
3406
3407                                 String origParamType = methPrmTypes.get(i);
3408                                 if (callbackClasses.contains(origParamType)) { // Check if this has callback object
3409                                         isCallbackMethod = true;
3410                                         callbackType = origParamType;
3411                                 }
3412                                 String paramType = checkAndGetParamClass(methPrmTypes.get(i));
3413                                 String methPrmType = checkAndGetCplusType(paramType);
3414                                 String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
3415                                 print(methParamComplete);
3416                                 // Check if this is the last element (don't print a comma)
3417                                 if (i != methParams.size() - 1) {
3418                                         print(", ");
3419                                 }
3420                         }
3421                         println(") {");
3422                         // Now, write the body of skeleton!
3423                         writeStdMethodBodyCplusSkeleton(methParams, methodId, intDecl.getMethodType(method));
3424                         println("}\n");
3425                         if (isCallbackMethod)
3426                                 writeInitCallbackCplusSkeleton(callbackSkeleton);
3427                 }
3428         }
3429
3430
3431         /**
3432          * HELPER: writeCallbackCplusNumStubs() writes the numStubs variable
3433          */
3434         private void writeCallbackCplusNumStubs(List<String> methParams, List<String> methPrmTypes, String callbackType) {
3435
3436                 for (int i = 0; i < methParams.size(); i++) {
3437                         String paramType = methPrmTypes.get(i);
3438                         String param = methParams.get(i);
3439                         //if (callbackType.equals(paramType)) {
3440                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
3441                                 String exchParamType = checkAndGetParamClass(paramType);
3442                                 // Print array if this is array or list if this is a list of callback objects
3443                                 println("int numStubs" + i + " = 0;");
3444                         }
3445                 }
3446         }
3447
3448
3449         /**
3450          * HELPER: writeCallbackCplusStubGeneration() writes the callback stub generation part
3451          */
3452         private void writeCallbackCplusStubGeneration(List<String> methParams, List<String> methPrmTypes, String callbackType) {
3453
3454                 // Iterate over callback objects
3455                 for (int i = 0; i < methParams.size(); i++) {
3456                         String paramType = methPrmTypes.get(i);
3457                         String param = methParams.get(i);
3458                         // Generate a loop if needed
3459                         if (checkCallbackType(paramType, callbackType)) { // Check if this has callback object
3460                                 String exchParamType = checkAndGetParamClass(paramType);
3461                                 if (isArrayOrList(paramType, param)) {
3462                                         println("vector<" + exchParamType + "> stub;");
3463                                         println("for (int objId = 0; objId < numStubs" + i + "; objId++) {");
3464                                         println(exchParamType + "* cb" + i + " = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
3465                                         println("stub" + i + ".push_back(cb);");
3466                                         println("vecCallbackObj.push_back(cb);");
3467                                         println("objIdCnt++;");
3468                                         println("}");
3469                                 } else {
3470                                         println(exchParamType + "* stub" + i + " = new " + exchParamType + "_CallbackStub(rmiCall, objIdCnt);");
3471                                         println("vecCallbackObj.push_back(stub" + i + ");");
3472                                         println("objIdCnt++;");
3473                                 }
3474                         }
3475                 }
3476         }
3477
3478
3479         /**
3480          * HELPER: checkAndWriteEnumTypeCplusSkeleton() writes the enum type (convert from enum to int)
3481          */
3482         private void checkAndWriteEnumTypeCplusSkeleton(List<String> methParams, List<String> methPrmTypes) {
3483
3484                 // Iterate and find enum declarations
3485                 for (int i = 0; i < methParams.size(); i++) {
3486                         String paramType = methPrmTypes.get(i);
3487                         String param = methParams.get(i);
3488                         String simpleType = getSimpleType(paramType);
3489                         if (isEnumClass(simpleType)) {
3490                         // Check if this is enum type
3491                                 if (isArrayOrList(paramType, param)) {  // An array
3492                                         println("int len" + i + " = paramEnumInt" + i + ".size();");
3493                                         println("vector<" + simpleType + "> paramEnum" + i + "(len" + i + ");");
3494                                         println("for (int i=0; i < len" + i + "; i++) {");
3495                                         println("paramEnum" + i + "[i] = (" + simpleType + ") paramEnumInt" + i + "[i];");
3496                                         println("}");
3497                                 } else {        // Just one element
3498                                         println(simpleType + " paramEnum" + i + ";");
3499                                         println("paramEnum" + i + " = (" + simpleType + ") paramEnumInt" + i + "[0];");
3500                                 }
3501                         }
3502                 }
3503         }
3504
3505
3506         /**
3507          * HELPER: checkAndWriteEnumRetTypeCplusSkeleton() writes the enum return type (convert from enum to int)
3508          */
3509         private void checkAndWriteEnumRetTypeCplusSkeleton(String retType) {
3510
3511                 // Strips off array "[]" for return type
3512                 String pureType = getSimpleArrayType(getSimpleType(retType));
3513                 // Take the inner type of generic
3514                 if (getParamCategory(retType) == ParamCategory.NONPRIMITIVES)
3515                         pureType = getTypeOfGeneric(retType)[0];
3516                 if (isEnumClass(pureType)) {
3517                 // Check if this is enum type
3518                         // Enum decoder
3519                         if (isArrayOrList(retType, retType)) {  // An array
3520                                 println("int retLen = retEnum.size();");
3521                                 println("vector<int> retEnumInt(retLen);");
3522                                 println("for (int i=0; i < retLen; i++) {");
3523                                 println("retEnumInt[i] = (int) retEnum[i];");
3524                                 println("}");
3525                         } else {        // Just one element
3526                                 println("vector<int> retEnumInt(1);");
3527                                 println("retEnumInt[0] = (int) retEnum;");
3528                         }
3529                 }
3530         }
3531
3532
3533         /**
3534          * HELPER: writeMethodHelperReturnCplusSkeleton() writes the return statement part in skeleton
3535          */
3536         private void writeMethodInputParameters(List<String> methParams, List<String> methPrmTypes,
3537                         Set<String> callbackClasses, String methodId) {
3538
3539                 print(methodId + "(");
3540                 for (int i = 0; i < methParams.size(); i++) {
3541                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3542                         if (callbackClasses.contains(paramType))
3543                                 print("stub" + i);
3544                         else if (isEnumClass(getSimpleType(paramType))) // Check if this is enum type
3545                                 print("paramEnum" + i);
3546                         else if (isStructClass(getSimpleType(paramType)))       // Struct type
3547                                 print("paramStruct" + i);
3548                         else
3549                                 print(getSimpleIdentifier(methParams.get(i)));
3550                         if (i != methParams.size() - 1) {
3551                                 print(", ");
3552                         }
3553                 }
3554                 println(");");
3555         }
3556
3557
3558         /**
3559          * HELPER: writeMethodHelperReturnCplusSkeleton() writes the return statement part in skeleton
3560          */
3561         private void writeMethodHelperReturnCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3562                         List<String> methPrmTypes, String method, boolean isCallbackMethod, String callbackType,
3563                         String methodId, Set<String> callbackClasses) {
3564
3565                 println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3566                 if (isCallbackMethod)
3567                         writeCallbackCplusStubGeneration(methParams, methPrmTypes, callbackType);
3568                 checkAndWriteEnumTypeCplusSkeleton(methParams, methPrmTypes);
3569                 writeStructMembersInitCplusSkeleton(intDecl, methParams, methPrmTypes, method);
3570                 // Check if this is "void"
3571                 String retType = intDecl.getMethodType(method);
3572                 // Check if this is "void"
3573                 if (retType.equals("void")) {
3574                         writeMethodInputParameters(methParams, methPrmTypes, callbackClasses, methodId);
3575                 } else { // We do have a return value
3576                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) // Enum type
3577                                 print(checkAndGetCplusType(retType) + " retEnum = ");
3578                         else if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3579                                 print(checkAndGetCplusType(retType) + " retStruct = ");
3580                         else
3581                                 print(checkAndGetCplusType(retType) + " retVal = ");
3582                         writeMethodInputParameters(methParams, methPrmTypes, callbackClasses, methodId);
3583                         checkAndWriteEnumRetTypeCplusSkeleton(retType);
3584                         if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3585                                 writeStructReturnCplusSkeleton(getSimpleArrayType(getSimpleType(retType)), retType);
3586                         if (isEnumClass(getSimpleArrayType(getSimpleType(retType)))) // Enum type
3587                                 println("void* retObj = &retEnumInt;");
3588                         else
3589                                 if (!isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3590                                         println("void* retObj = &retVal;");
3591                         String retTypeC = checkAndGetCplusType(retType);
3592                         if (isStructClass(getSimpleArrayType(getSimpleType(retType)))) // Struct type
3593                                 println("rmiObj->sendReturnObj(retObj, retCls, numRetObj);");
3594                         else
3595                                 println("rmiObj->sendReturnObj(retObj, \"" + getEnumType(checkAndGetCplusArrayType(retTypeC)) + "\");");
3596                 }
3597         }
3598
3599
3600         /**
3601          * HELPER: writeStdMethodHelperBodyCplusSkeleton() writes the standard method body helper in the skeleton class
3602          */
3603         private void writeStdMethodHelperBodyCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3604                         List<String> methPrmTypes, String method, String methodId, Set<String> callbackClasses) {
3605
3606                 // Generate array of parameter types
3607                 boolean isCallbackMethod = false;
3608                 String callbackType = null;
3609                 print("string paramCls[] = { ");
3610                 for (int i = 0; i < methParams.size(); i++) {
3611                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3612                         if (callbackClasses.contains(paramType)) {
3613                                 isCallbackMethod = true;
3614                                 callbackType = paramType;
3615                                 print("\"int\"");
3616                         } else {        // Generate normal classes if it's not a callback object
3617                                 String paramTypeC = checkAndGetCplusType(methPrmTypes.get(i));
3618                                 String prmType = checkAndGetCplusArrayType(paramTypeC, methParams.get(i));
3619                                 print("\"" + getEnumType(prmType) + "\"");
3620                         }
3621                         if (i != methParams.size() - 1) {
3622                                 print(", ");
3623                         }
3624                 }
3625                 println(" };");
3626                 println("int numParam = " + methParams.size() + ";");
3627                 if (isCallbackMethod)
3628                         writeCallbackCplusNumStubs(methParams, methPrmTypes, callbackType);
3629                 // Generate parameters
3630                 for (int i = 0; i < methParams.size(); i++) {
3631                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3632                         if (!callbackClasses.contains(paramType)) {
3633                                 String methPrmType = checkAndGetCplusType(methPrmTypes.get(i));
3634                                 if (isEnumClass(getSimpleType(methPrmType))) {  // Check if this is enum type
3635                                         println("vector<int> paramEnumInt" + i + ";");
3636                                 } else {
3637                                         String methParamComplete = checkAndGetCplusArray(methPrmType, methParams.get(i));
3638                                         println(methParamComplete + ";");
3639                                 }
3640                         }
3641                 }
3642                 // Generate array of parameter objects
3643                 print("void* paramObj[] = { ");
3644                 for (int i = 0; i < methParams.size(); i++) {
3645                         String paramType = returnGenericCallbackType(methPrmTypes.get(i));
3646                         if (callbackClasses.contains(paramType))
3647                                 print("&numStubs" + i);
3648                         else if (isEnumClass(getSimpleType(paramType))) // Check if this is enum type
3649                                 print("&paramEnumInt" + i);
3650                         else
3651                                 print("&" + getSimpleIdentifier(methParams.get(i)));
3652                         if (i != methParams.size() - 1) {
3653                                 print(", ");
3654                         }
3655                 }
3656                 println(" };");
3657                 // Write the return value part
3658                 writeMethodHelperReturnCplusSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod,
3659                         callbackType, methodId, callbackClasses);
3660         }
3661
3662
3663         /**
3664          * HELPER: writeStructMembersCplusSkeleton() writes member parameters of struct
3665          */
3666         private void writeStructMembersCplusSkeleton(String simpleType, String paramType,
3667                         String param, String method, InterfaceDecl intDecl, int iVar) {
3668
3669                 // Get the struct declaration for this struct and generate initialization code
3670                 StructDecl structDecl = getStructDecl(simpleType);
3671                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3672                 List<String> members = structDecl.getMembers(simpleType);
3673                 int methodNumId = intDecl.getMethodNumId(method);
3674                 String counter = "struct" + methodNumId + "Size" + iVar;
3675                 if (isArrayOrList(param, paramType)) {  // An array or list
3676                         println("for(int i = 0; i < " + counter + "; i++) {");
3677                 }
3678                 // Set up variables
3679                 if (isArrayOrList(param, paramType)) {  // An array or list
3680                         for (int i = 0; i < members.size(); i++) {
3681                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3682                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3683                                 println(getSimpleType(getEnumType(prmType)) + " param" + i + "[" + counter + "];");
3684                         }
3685                 } else {        // Just one struct element
3686                         for (int i = 0; i < members.size(); i++) {
3687                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3688                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3689                                 println(getSimpleType(getEnumType(prmType)) + " param" + i + ";");
3690                         }
3691                 }
3692                 println("int pos = 0;");
3693                 if (isArrayOrList(param, paramType)) {  // An array or list
3694                         println("for(int i = 0; i < retLen; i++) {");
3695                         for (int i = 0; i < members.size(); i++) {
3696                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3697                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3698                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3699                                 println("paramObj[pos++] = &param" + i + "[i];");
3700                         }
3701                         println("}");
3702                 } else {        // Just one struct element
3703                         for (int i = 0; i < members.size(); i++) {
3704                                 String prmTypeC = checkAndGetCplusType(memTypes.get(i));
3705                                 String prmType = checkAndGetCplusArrayType(prmTypeC, members.get(i));
3706                                 println("paramCls[pos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3707                                 println("paramObj[pos++] = &param" + i + ";");
3708                         }
3709                 }
3710         }
3711
3712
3713         /**
3714          * HELPER: writeStructMembersInitCplusSkeleton() writes member parameters initialization of struct
3715          */
3716         private void writeStructMembersInitCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3717                         List<String> methPrmTypes, String method) {
3718
3719                 for (int i = 0; i < methParams.size(); i++) {
3720                         String paramType = methPrmTypes.get(i);
3721                         String param = methParams.get(i);
3722                         String simpleType = getGenericType(paramType);
3723                         if (isStructClass(simpleType)) {
3724                                 int methodNumId = intDecl.getMethodNumId(method);
3725                                 String counter = "struct" + methodNumId + "Size" + i;
3726                                 // Declaration
3727                                 if (isArrayOrList(param, paramType)) {  // An array or list
3728                                         println("vector<" + simpleType + "> paramStruct" + i + ";");
3729                                 } else
3730                                         println(simpleType + " paramStruct" + i + ";");
3731                                 // Initialize members
3732                                 StructDecl structDecl = getStructDecl(simpleType);
3733                                 List<String> members = structDecl.getMembers(simpleType);
3734                                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3735                                 if (isArrayOrList(param, paramType)) {  // An array or list
3736                                         println("for(int i = 0; i < " + counter + "; i++) {");
3737                                         for (int j = 0; j < members.size(); j++) {
3738                                                 print("paramStruct" + i + "[i]." + getSimpleIdentifier(members.get(j)));
3739                                                 println(" = param" + j + "[i];");
3740                                         }
3741                                         println("}");
3742                                 } else {        // Just one struct element
3743                                         for (int j = 0; j < members.size(); j++) {
3744                                                 print("paramStruct" + i + "." + getSimpleIdentifier(members.get(j)));
3745                                                 println(" = param" + j + ";");
3746                                         }
3747                                 }
3748                         }
3749                 }
3750         }
3751
3752
3753         /**
3754          * HELPER: writeStructReturnCplusSkeleton() writes parameters of struct for return statement
3755          */
3756         private void writeStructReturnCplusSkeleton(String simpleType, String retType) {
3757
3758                 // Minimum retLen is 1 if this is a single struct object
3759                 if (isArrayOrList(retType, retType))
3760                         println("int retLen = retStruct.size();");
3761                 else    // Just single struct object
3762                         println("int retLen = 1;");
3763                 println("void* retLenObj = &retLen;");
3764                 println("rmiObj->sendReturnObj(retLenObj, \"int\");");
3765                 int numMem = getNumOfMembers(simpleType);
3766                 println("int numRetObj = " + numMem + "*retLen;");
3767                 println("string retCls[numRetObj];");
3768                 println("void* retObj[numRetObj];");
3769                 println("int retPos = 0;");
3770                 // Get the struct declaration for this struct and generate initialization code
3771                 StructDecl structDecl = getStructDecl(simpleType);
3772                 List<String> memTypes = structDecl.getMemberTypes(simpleType);
3773                 List<String> members = structDecl.getMembers(simpleType);
3774                 if (isArrayOrList(retType, retType)) {  // An array or list
3775                         println("for(int i = 0; i < retLen; i++) {");
3776                         for (int i = 0; i < members.size(); i++) {
3777                                 String paramTypeC = checkAndGetCplusType(memTypes.get(i));
3778                                 String prmType = checkAndGetCplusArrayType(paramTypeC, members.get(i));
3779                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3780                                 print("retObj[retPos++] = &retStruct[i].");
3781                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
3782                                 println(";");
3783                         }
3784                         println("}");
3785                 } else {        // Just one struct element
3786                         for (int i = 0; i < members.size(); i++) {
3787                                 String paramTypeC = checkAndGetCplusType(memTypes.get(i));
3788                                 String prmType = checkAndGetCplusArrayType(paramTypeC, members.get(i));
3789                                 println("retCls[retPos] = \"" + getSimpleType(getEnumType(prmType)) + "\";");
3790                                 print("retObj[retPos++] = &retStruct.");
3791                                 print(getEnumParam(memTypes.get(i), getSimpleIdentifier(members.get(i)), i));
3792                                 println(";");
3793                         }
3794                 }
3795
3796         }
3797
3798
3799         /**
3800          * HELPER: writeMethodHelperStructCplusSkeleton() writes the struct in skeleton
3801          */
3802         private void writeMethodHelperStructCplusSkeleton(InterfaceDecl intDecl, List<String> methParams,
3803                         List<String> methPrmTypes, String method, String methodId, Set<String> callbackClasses) {
3804
3805                 // Generate array of parameter objects
3806                 boolean isCallbackMethod = false;
3807                 String callbackType = null;
3808                 print("int numParam = ");
3809                 writeLengthStructParamClassSkeleton(methParams, methPrmTypes, method, intDecl);
3810                 println(";");
3811                 println("string paramCls[numParam];");
3812                 println("void* paramObj[numParam];");
3813                 // Iterate again over the parameters
3814                 for (int i = 0; i < methParams.size(); i++) {
3815                         String paramType = methPrmTypes.get(i);
3816                         String param = methParams.get(i);
3817                         String simpleType = getGenericType(paramType);
3818                         if (isStructClass(simpleType)) {
3819                                 writeStructMembersCplusSkeleton(simpleType, paramType, param, method, intDecl, i);
3820                         } else {
3821                                 String prmType = returnGenericCallbackType(methPrmTypes.get(i));
3822                                 if (callbackClasses.contains(prmType)) {
3823                                         isCallbackMethod = true;
3824                                         callbackType = paramType;
3825                                         writeCallbackCplusNumStubs(methParams, methPrmTypes, callbackType);
3826                                         println("paramCls[pos] = \"int\";");
3827                                         println("paramObj[pos++] = &numStubs" + i + ";");
3828                                 } else {        // Generate normal classes if it's not a callback object
3829                                         String paramTypeC = checkAndGetCplusType(methPrmTypes.get(i));
3830                                         String prmTypeC = checkAndGetCplusArrayType(paramTypeC, methParams.get(i));
3831                                         if (isEnumClass(getSimpleType(paramTypeC))) {   // Check if this is enum type
3832                                                 println("vector<int> paramEnumInt" + i + ";");
3833                                         } else {
3834                                                 String methParamComplete = checkAndGetCplusArray(paramTypeC, methParams.get(i));
3835                                                 println(methParamComplete + ";");
3836                                         }
3837                                         println("paramCls[pos] = \"" + getEnumType(prmTypeC) + "\";");
3838                                         if (isEnumClass(getSimpleType(paramType)))      // Check if this is enum type
3839                                                 println("paramObj[pos++] = &paramEnumInt" + i);
3840                                         else
3841                                                 println("paramObj[pos++] = &" + getSimpleIdentifier(methParams.get(i)) + ";");
3842                                 }
3843                         }
3844                 }
3845                 // Write the return value part
3846                 writeMethodHelperReturnCplusSkeleton(intDecl, methParams, methPrmTypes, method, isCallbackMethod,
3847                         callbackType, methodId, callbackClasses);
3848         }
3849
3850
3851         /**
3852          * HELPER: writeMethodHelperCplusSkeleton() writes the method helper of the skeleton class
3853          */
3854         private void writeMethodHelperCplusSkeleton(Collection<String> methods, InterfaceDecl intDecl, Set<String> callbackClasses) {
3855
3856                 // Use this set to handle two same methodIds
3857                 Set<String> uniqueMethodIds = new HashSet<String>();
3858                 for (String method : methods) {
3859
3860                         List<String> methParams = intDecl.getMethodParams(method);
3861                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3862                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
3863                                 String methodId = intDecl.getMethodId(method);
3864                                 print("void ___");
3865                                 String helperMethod = methodId;
3866                                 if (uniqueMethodIds.contains(methodId))
3867                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
3868                                 else
3869                                         uniqueMethodIds.add(methodId);
3870                                 String retType = intDecl.getMethodType(method);
3871                                 print(helperMethod + "(");
3872                                 boolean begin = true;
3873                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
3874                                         String paramType = methPrmTypes.get(i);
3875                                         String param = methParams.get(i);
3876                                         String simpleType = getSimpleType(paramType);
3877                                         if (isStructClass(simpleType)) {
3878                                                 if (!begin) {   // Generate comma for not the beginning variable
3879                                                         print(", "); begin = false;
3880                                                 }
3881                                                 int methodNumId = intDecl.getMethodNumId(method);
3882                                                 print("int struct" + methodNumId + "Size" + i);
3883                                         }
3884                                 }
3885                                 println(") {");
3886                                 writeMethodHelperStructCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
3887                                 println("}\n");
3888                         } else {
3889                                 String methodId = intDecl.getMethodId(method);
3890                                 print("void ___");
3891                                 String helperMethod = methodId;
3892                                 if (uniqueMethodIds.contains(methodId))
3893                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
3894                                 else
3895                                         uniqueMethodIds.add(methodId);
3896                                 // Check if this is "void"
3897                                 String retType = intDecl.getMethodType(method);
3898                                 println(helperMethod + "() {");
3899                                 // Now, write the helper body of skeleton!
3900                                 writeStdMethodHelperBodyCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
3901                                 println("}\n");
3902                         }
3903                 }
3904                 // Write method helper for structs
3905                 writeMethodHelperStructSetupCplusSkeleton(methods, intDecl);
3906         }
3907
3908
3909         /**
3910          * HELPER: writeMethodHelperStructSetupCplusSkeleton() writes the method helper of struct in skeleton class
3911          */
3912         private void writeMethodHelperStructSetupCplusSkeleton(Collection<String> methods,
3913                         InterfaceDecl intDecl) {
3914
3915                 // Use this set to handle two same methodIds
3916                 for (String method : methods) {
3917
3918                         List<String> methParams = intDecl.getMethodParams(method);
3919                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3920                         // Check for params with structs
3921                         for (int i = 0; i < methParams.size(); i++) {
3922                                 String paramType = methPrmTypes.get(i);
3923                                 String param = methParams.get(i);
3924                                 String simpleType = getSimpleType(paramType);
3925                                 if (isStructClass(simpleType)) {
3926                                         int methodNumId = intDecl.getMethodNumId(method);
3927                                         print("int ___");
3928                                         String helperMethod = methodNumId + "struct" + i;
3929                                         println(helperMethod + "() {");
3930                                         // Now, write the helper body of skeleton!
3931                                         println("string paramCls[] = { \"int\" };");
3932                                         println("int numParam = 1;");
3933                                         println("int param0 = 0;");
3934                                         println("void* paramObj[] = { &param0 };");
3935                                         println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3936                                         println("return param0;");
3937                                         println("}\n");
3938                                 }
3939                         }
3940                 }
3941         }
3942
3943
3944         /**
3945          * HELPER: writeMethodHelperStructSetupCplusCallbackSkeleton() writes the method helper of struct in skeleton class
3946          */
3947         private void writeMethodHelperStructSetupCplusCallbackSkeleton(Collection<String> methods,
3948                         InterfaceDecl intDecl) {
3949
3950                 // Use this set to handle two same methodIds
3951                 for (String method : methods) {
3952
3953                         List<String> methParams = intDecl.getMethodParams(method);
3954                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
3955                         // Check for params with structs
3956                         for (int i = 0; i < methParams.size(); i++) {
3957                                 String paramType = methPrmTypes.get(i);
3958                                 String param = methParams.get(i);
3959                                 String simpleType = getSimpleType(paramType);
3960                                 if (isStructClass(simpleType)) {
3961                                         int methodNumId = intDecl.getMethodNumId(method);
3962                                         print("int ___");
3963                                         String helperMethod = methodNumId + "struct" + i;
3964                                         println(helperMethod + "(IoTRMIObject* rmiObj) {");
3965                                         // Now, write the helper body of skeleton!
3966                                         println("string paramCls[] = { \"int\" };");
3967                                         println("int numParam = 1;");
3968                                         println("int param0 = 0;");
3969                                         println("void* paramObj[] = { &param0 };");
3970                                         println("rmiObj->getMethodParams(paramCls, numParam, paramObj);");
3971                                         println("return param0;");
3972                                         println("}\n");
3973                                 }
3974                         }
3975                 }
3976         }
3977
3978
3979         /**
3980          * HELPER: writeCplusMethodPermission() writes permission checks in skeleton
3981          */
3982         private void writeCplusMethodPermission(String intface) {
3983
3984                 // Get all the different stubs
3985                 Map<String,Set<String>> mapNewIntMethods = mapInt2NewInts.get(intface);
3986                 for (Map.Entry<String,Set<String>> intMeth : mapNewIntMethods.entrySet()) {
3987                         String newIntface = intMeth.getKey();
3988                         int newObjectId = mapNewIntfaceObjId.get(newIntface);
3989                         println("if (_objectId == object" + newObjectId + "Id) {");
3990                         println("if (set" + newObjectId + "Allowed.find(methodId) == set" + newObjectId + "Allowed.end()) {");
3991                         println("cerr << \"Object with object Id: \" << _objectId << \"  is not allowed to access method: \" << methodId << endl;");
3992                         println("exit(-1);");
3993                         println("}");
3994                         println("else {");
3995                         println("cerr << \"Object Id: \" << _objectId << \" not recognized!\" << endl;");
3996                         println("exit(-1);");
3997                         println("}");
3998                         println("}");
3999                 }
4000         }
4001
4002
4003         /**
4004          * HELPER: writeCplusWaitRequestInvokeMethod() writes the main loop of the skeleton class
4005          */
4006         private void writeCplusWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl, boolean callbackExist, String intface) {
4007
4008                 // Use this set to handle two same methodIds
4009                 Set<String> uniqueMethodIds = new HashSet<String>();
4010                 println("void ___waitRequestInvokeMethod() {");
4011                 // Write variables here if we have callbacks or enums or structs
4012                 writeCountVarStructSkeleton(methods, intDecl);
4013                 println("while (true) {");
4014                 println("rmiObj->getMethodBytes();");
4015                 println("int _objectId = rmiObj->getObjectId();");
4016                 println("int methodId = rmiObj->getMethodId();");
4017                 // Generate permission check
4018                 writeCplusMethodPermission(intface);
4019                 println("switch (methodId) {");
4020                 // Print methods and method Ids
4021                 for (String method : methods) {
4022                         String methodId = intDecl.getMethodId(method);
4023                         int methodNumId = intDecl.getMethodNumId(method);
4024                         print("case " + methodNumId + ": ___");
4025                         String helperMethod = methodId;
4026                         if (uniqueMethodIds.contains(methodId))
4027                                 helperMethod = helperMethod + methodNumId;
4028                         else
4029                                 uniqueMethodIds.add(methodId);
4030                         print(helperMethod + "(");
4031                         writeInputCountVarStructSkeleton(method, intDecl);
4032                         println("); break;");
4033                 }
4034                 String method = "___initCallBack()";
4035                 // Print case -9999 (callback handler) if callback exists
4036                 if (callbackExist) {
4037                         int methodId = intDecl.getHelperMethodNumId(method);
4038                         println("case " + methodId + ": ___regCB(); break;");
4039                 }
4040                 writeMethodCallStructSkeleton(methods, intDecl);
4041                 println("default: ");
4042                 println("cerr << \"Method Id \" << methodId << \" not recognized!\" << endl;");
4043                 println("throw exception();");
4044                 println("}");
4045                 println("}");
4046                 println("}\n");
4047         }
4048
4049
4050         /**
4051          * generateCplusSkeletonClass() generate skeletons based on the methods list in C++
4052          */
4053         public void generateCplusSkeletonClass() throws IOException {
4054
4055                 // Create a new directory
4056                 String path = createDirectories(dir, subdir);
4057                 for (String intface : mapIntfacePTH.keySet()) {
4058                         // Open a new file to write into
4059                         String newSkelClass = intface + "_Skeleton";
4060                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".hpp");
4061                         pw = new PrintWriter(new BufferedWriter(fw));
4062                         // Write file headers
4063                         println("#ifndef _" + newSkelClass.toUpperCase() + "_HPP__");
4064                         println("#define _" + newSkelClass.toUpperCase() + "_HPP__");
4065                         println("#include <iostream>");
4066                         println("#include \"" + intface + ".hpp\"\n");
4067                         // Pass in set of methods and get import classes
4068                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4069                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
4070                         List<String> methods = intDecl.getMethods();
4071                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
4072                         List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
4073                         List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
4074                         printIncludeStatements(allIncludeClasses); println("");
4075                         println("using namespace std;\n");
4076                         // Find out if there are callback objects
4077                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
4078                         boolean callbackExist = !callbackClasses.isEmpty();
4079                         // Write class header
4080                         println("class " + newSkelClass + " : public " + intface); println("{");
4081                         println("private:\n");
4082                         // Write properties
4083                         writePropertiesCplusSkeleton(intface, callbackExist, callbackClasses);
4084                         println("public:\n");
4085                         // Write constructor
4086                         writeConstructorCplusSkeleton(newSkelClass, intface, callbackExist);
4087                         // Write deconstructor
4088                         writeDeconstructorCplusSkeleton(newSkelClass, callbackExist, callbackClasses);
4089                         // Write methods
4090                         writeMethodCplusSkeleton(methods, intDecl, callbackClasses, false);
4091                         // Write method helper
4092                         writeMethodHelperCplusSkeleton(methods, intDecl, callbackClasses);
4093                         // Write waitRequestInvokeMethod() - main loop
4094                         writeCplusWaitRequestInvokeMethod(methods, intDecl, callbackExist, intface);
4095                         println("};");
4096                         writePermissionInitializationCplus(intface, newSkelClass, intDecl);
4097                         println("#endif");
4098                         pw.close();
4099                         System.out.println("IoTCompiler: Generated skeleton class " + newSkelClass + ".hpp...");
4100                 }
4101         }
4102
4103
4104         /**
4105          * HELPER: writePropertiesCplusCallbackSkeleton() writes the properties of the callback skeleton class
4106          */
4107         private void writePropertiesCplusCallbackSkeleton(String intface, boolean callbackExist, Set<String> callbackClasses) {
4108
4109                 println(intface + " *mainObj;");
4110                 // Keep track of object Ids of all stubs registered to this interface
4111                 println("static int objectId;");
4112                 // Callback
4113                 if (callbackExist) {
4114                         Iterator it = callbackClasses.iterator();
4115                         String callbackType = (String) it.next();
4116                         String exchangeType = checkAndGetParamClass(callbackType);
4117                         println("// Callback properties");
4118                         println("IoTRMICall* rmiCall;");
4119                         println("vector<" + exchangeType + "*> vecCallbackObj;");
4120                         println("static int objIdCnt;");
4121                 }
4122                 println("\n");
4123         }
4124
4125
4126         /**
4127          * HELPER: writeConstructorCplusCallbackSkeleton() writes the constructor of the skeleton class
4128          */
4129         private void writeConstructorCplusCallbackSkeleton(String newSkelClass, String intface, boolean callbackExist) {
4130
4131                 println(newSkelClass + "(" + intface + " *_mainObj, int _objectId) {");
4132                 println("mainObj = _mainObj;");
4133                 println("objectId = _objectId;");
4134                 // Callback
4135                 if (callbackExist) {
4136                         println("objIdCnt = 0;");
4137                 }
4138                 println("}\n");
4139         }
4140
4141
4142         /**
4143          * HELPER: writeDeconstructorCplusStub() writes the deconstructor of the stub class
4144          */
4145         private void writeDeconstructorCplusCallbackSkeleton(String newStubClass, boolean callbackExist,
4146                         Set<String> callbackClasses) {
4147
4148                 println("~" + newStubClass + "() {");
4149                 if (callbackExist) {
4150                 // We assume that each class only has one callback interface for now
4151                         println("if (rmiCall != NULL) {");
4152                         println("delete rmiCall;");
4153                         println("rmiCall = NULL;");
4154                         println("}");
4155                         Iterator it = callbackClasses.iterator();
4156                         String callbackType = (String) it.next();
4157                         String exchangeType = checkAndGetParamClass(callbackType);
4158                         println("for(" + exchangeType + "* cb : vecCallbackObj) {");
4159                         println("delete cb;");
4160                         println("cb = NULL;");
4161                         println("}");
4162                 }
4163                 println("}");
4164                 println("");
4165         }
4166
4167
4168         /**
4169          * HELPER: writeMethodHelperCplusCallbackSkeleton() writes the method helper of callback skeleton class
4170          */
4171         private void writeMethodHelperCplusCallbackSkeleton(Collection<String> methods, InterfaceDecl intDecl,
4172                         Set<String> callbackClasses) {
4173
4174                 // Use this set to handle two same methodIds
4175                 Set<String> uniqueMethodIds = new HashSet<String>();
4176                 for (String method : methods) {
4177
4178                         List<String> methParams = intDecl.getMethodParams(method);
4179                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4180                         if (isStructPresent(methParams, methPrmTypes)) {        // Treat struct differently
4181                                 String methodId = intDecl.getMethodId(method);
4182                                 print("void ___");
4183                                 String helperMethod = methodId;
4184                                 if (uniqueMethodIds.contains(methodId))
4185                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
4186                                 else
4187                                         uniqueMethodIds.add(methodId);
4188                                 String retType = intDecl.getMethodType(method);
4189                                 print(helperMethod + "(");
4190                                 boolean begin = true;
4191                                 for (int i = 0; i < methParams.size(); i++) { // Print size variables
4192                                         String paramType = methPrmTypes.get(i);
4193                                         String param = methParams.get(i);
4194                                         String simpleType = getSimpleType(paramType);
4195                                         if (isStructClass(simpleType)) {
4196                                                 if (!begin) {   // Generate comma for not the beginning variable
4197                                                         print(", "); begin = false;
4198                                                 }
4199                                                 int methodNumId = intDecl.getMethodNumId(method);
4200                                                 print("int struct" + methodNumId + "Size" + i);
4201                                         }
4202                                 }
4203                                 println(", IoTRMIObject* rmiObj) {");
4204                                 writeMethodHelperStructCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
4205                                 println("}\n");
4206                         } else {
4207                                 String methodId = intDecl.getMethodId(method);
4208                                 print("void ___");
4209                                 String helperMethod = methodId;
4210                                 if (uniqueMethodIds.contains(methodId))
4211                                         helperMethod = helperMethod + intDecl.getMethodNumId(method);
4212                                 else
4213                                         uniqueMethodIds.add(methodId);
4214                                 // Check if this is "void"
4215                                 String retType = intDecl.getMethodType(method);
4216                                 println(helperMethod + "(IoTRMIObject* rmiObj) {");
4217                                 // Now, write the helper body of skeleton!
4218                                 writeStdMethodHelperBodyCplusSkeleton(intDecl, methParams, methPrmTypes, method, methodId, callbackClasses);
4219                                 println("}\n");
4220                         }
4221                 }
4222                 // Write method helper for structs
4223                 writeMethodHelperStructSetupCplusCallbackSkeleton(methods, intDecl);
4224         }
4225
4226
4227         /**
4228          * HELPER: writeCplusCallbackWaitRequestInvokeMethod() writes the request invoke method of the skeleton callback class
4229          */
4230         private void writeCplusCallbackWaitRequestInvokeMethod(Collection<String> methods, InterfaceDecl intDecl,
4231                         boolean callbackExist) {
4232
4233                 // Use this set to handle two same methodIds
4234                 Set<String> uniqueMethodIds = new HashSet<String>();
4235                 println("void invokeMethod(IoTRMIObject* rmiObj) {");
4236                 // Write variables here if we have callbacks or enums or structs
4237                 writeCountVarStructSkeleton(methods, intDecl);
4238                 // Write variables here if we have callbacks or enums or structs
4239                 println("int methodId = rmiObj->getMethodId();");
4240                 // TODO: code the permission check here!
4241                 println("switch (methodId) {");
4242                 // Print methods and method Ids
4243                 for (String method : methods) {
4244                         String methodId = intDecl.getMethodId(method);
4245                         int methodNumId = intDecl.getMethodNumId(method);
4246                         print("case " + methodNumId + ": ___");
4247                         String helperMethod = methodId;
4248                         if (uniqueMethodIds.contains(methodId))
4249                                 helperMethod = helperMethod + methodNumId;
4250                         else
4251                                 uniqueMethodIds.add(methodId);
4252                         print(helperMethod + "(");
4253                         if (writeInputCountVarStructSkeleton(method, intDecl))
4254                                 println(", rmiObj); break;");
4255                         else
4256                                 println("rmiObj); break;");
4257                 }
4258                 String method = "___initCallBack()";
4259                 // Print case -9999 (callback handler) if callback exists
4260                 if (callbackExist) {
4261                         int methodId = intDecl.getHelperMethodNumId(method);
4262                         println("case " + methodId + ": ___regCB(rmiObj); break;");
4263                 }
4264                 writeMethodCallStructCallbackSkeleton(methods, intDecl);
4265                 println("default: ");
4266                 println("cerr << \"Method Id \" << methodId << \" not recognized!\" << endl;");
4267                 println("throw exception();");
4268                 println("}");
4269                 println("}\n");
4270         }
4271
4272
4273         /**
4274          * generateCplusCallbackSkeletonClass() generate callback skeletons based on the methods list in C++
4275          */
4276         public void generateCplusCallbackSkeletonClass() throws IOException {
4277
4278                 // Create a new directory
4279                 String path = createDirectories(dir, subdir);
4280                 for (String intface : mapIntfacePTH.keySet()) {
4281                         // Open a new file to write into
4282                         String newSkelClass = intface + "_CallbackSkeleton";
4283                         FileWriter fw = new FileWriter(path + "/" + newSkelClass + ".hpp");
4284                         pw = new PrintWriter(new BufferedWriter(fw));
4285                         // Write file headers
4286                         println("#ifndef _" + newSkelClass.toUpperCase() + "_HPP__");
4287                         println("#define _" + newSkelClass.toUpperCase() + "_HPP__");
4288                         println("#include <iostream>");
4289                         println("#include \"" + intface + ".hpp\"\n");
4290                         // Pass in set of methods and get import classes
4291                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4292                         InterfaceDecl intDecl = (InterfaceDecl) decHandler.getInterfaceDecl(intface);
4293                         List<String> methods = intDecl.getMethods();
4294                         Set<String> includeClasses = getIncludeClasses(methods, intDecl, intface, true);
4295                         List<String> stdIncludeClasses = getStandardCplusIncludeClasses();
4296                         List<String> allIncludeClasses = getAllLibClasses(stdIncludeClasses, includeClasses);
4297                         printIncludeStatements(allIncludeClasses); println("");
4298                         // Find out if there are callback objects
4299                         Set<String> callbackClasses = getCallbackClasses(methods, intDecl);
4300                         boolean callbackExist = !callbackClasses.isEmpty();
4301                         println("using namespace std;\n");
4302                         // Write class header
4303                         println("class " + newSkelClass + " : public " + intface); println("{");
4304                         println("private:\n");
4305                         // Write properties
4306                         writePropertiesCplusCallbackSkeleton(intface, callbackExist, callbackClasses);
4307                         println("public:\n");
4308                         // Write constructor
4309                         writeConstructorCplusCallbackSkeleton(newSkelClass, intface, callbackExist);
4310                         // Write deconstructor
4311                         writeDeconstructorCplusCallbackSkeleton(newSkelClass, callbackExist, callbackClasses);
4312                         // Write methods
4313                         writeMethodCplusSkeleton(methods, intDecl, callbackClasses, true);
4314                         // Write method helper
4315                         writeMethodHelperCplusCallbackSkeleton(methods, intDecl, callbackClasses);
4316                         // Write waitRequestInvokeMethod() - main loop
4317                         writeCplusCallbackWaitRequestInvokeMethod(methods, intDecl, callbackExist);
4318                         println("};");
4319                         println("#endif");
4320                         pw.close();
4321                         System.out.println("IoTCompiler: Generated callback skeleton class " + newSkelClass + ".hpp...");
4322                 }
4323         }
4324
4325
4326         /**
4327          * generateInitializer() generate initializer based on type
4328          */
4329         public String generateCplusInitializer(String type) {
4330
4331                 // Generate dummy returns for now
4332                 if (type.equals("short")||
4333                         type.equals("int")      ||
4334                         type.equals("long") ||
4335                         type.equals("float")||
4336                         type.equals("double")) {
4337
4338                         return "0";
4339                 } else if ( type.equals("String") ||
4340                                         type.equals("string")) {
4341
4342                         return "\"\"";
4343                 } else if ( type.equals("char") ||
4344                                         type.equals("byte")) {
4345
4346                         return "\' \'";
4347                 } else if ( type.equals("boolean")) {
4348
4349                         return "false";
4350                 } else {
4351                         return "NULL";
4352                 }
4353         }
4354
4355
4356         /**
4357          * setDirectory() sets a new directory for stub files
4358          */
4359         public void setDirectory(String _subdir) {
4360
4361                 subdir = _subdir;
4362         }
4363
4364
4365         /**
4366          * printUsage() prints the usage of this compiler
4367          */
4368         public static void printUsage() {
4369
4370                 System.out.println();
4371                 System.out.println("Sentinel interface and stub compiler version 1.0");
4372                 System.out.println("Copyright (c) 2015-2016 University of California, Irvine - Programming Language Group.");
4373                 System.out.println("All rights reserved.");
4374                 System.out.println("Usage:");
4375                 System.out.println("\tjava IoTCompiler -help / --help / -h\n");
4376                 System.out.println("\t\tDisplay this help texts\n\n");
4377                 System.out.println("\tjava IoTCompiler [<main-policy-file> <req-policy-file>]");
4378                 System.out.println("\tjava IoTCompiler [<main-policy-file> <req-policy-file>] [options]\n");
4379                 System.out.println("\t\tTake one or more pairs of main-req policy files, and generate Java and/or C++ files\n");
4380                 System.out.println("Options:");
4381                 System.out.println("\t-java\t<directory>\tGenerate Java stub files");
4382                 System.out.println("\t-cplus\t<directory>\tGenerate C++ stub files");
4383                 System.out.println();
4384         }
4385
4386
4387         /**
4388          * parseFile() prepares Lexer and Parser objects, then parses the file
4389          */
4390         public static ParseNode parseFile(String file) {
4391
4392                 ParseNode pn = null;
4393                 try {
4394                         ComplexSymbolFactory csf = new ComplexSymbolFactory();
4395                         ScannerBuffer lexer =
4396                                 new ScannerBuffer(new Lexer(new BufferedReader(new FileReader(file)),csf));
4397                         Parser parse = new Parser(lexer,csf);
4398                         pn = (ParseNode) parse.parse().value;
4399                 } catch (Exception e) {
4400                         e.printStackTrace();
4401                         throw new Error("IoTCompiler: ERROR parsing policy file or wrong command line option: " + file);
4402                 }
4403
4404                 return pn;
4405         }
4406
4407
4408         /**================
4409          * Basic helper functions
4410          **================
4411          */
4412         boolean newline=true;
4413         int tablevel=0;
4414
4415         private void print(String str) {
4416                 if (newline) {
4417                         int tab=tablevel;
4418                         if (str.equals("}"))
4419                                 tab--;
4420                         for(int i=0; i<tab; i++)
4421                                 pw.print("\t");
4422                 }
4423                 pw.print(str);
4424                 updatetabbing(str);
4425                 newline=false;
4426         }
4427
4428
4429         /**
4430          * This function converts Java to C++ type for compilation
4431          */
4432         private String convertType(String jType) {
4433
4434                 return mapPrimitives.get(jType);
4435         }
4436
4437
4438         /**
4439          * A collection of methods with print-to-file functionality
4440          */
4441         private void println(String str) {
4442                 if (newline) {
4443                         int tab = tablevel;
4444                         if (str.contains("}") && !str.contains("{"))
4445                                 tab--;
4446                         for(int i=0; i<tab; i++)
4447                                 pw.print("\t");
4448                 }
4449                 pw.println(str);
4450                 updatetabbing(str);
4451                 newline = true;
4452         }
4453
4454
4455         private void updatetabbing(String str) {
4456
4457                 tablevel+=count(str,'{')-count(str,'}');
4458         }
4459
4460
4461         private int count(String str, char key) {
4462                 char[] array = str.toCharArray();
4463                 int count = 0;
4464                 for(int i=0; i<array.length; i++) {
4465                         if (array[i] == key)
4466                                 count++;
4467                 }
4468                 return count;
4469         }
4470
4471
4472         private void createDirectory(String dirName) {
4473
4474                 File file = new File(dirName);
4475                 if (!file.exists()) {
4476                         if (file.mkdir()) {
4477                                 System.out.println("IoTCompiler: Directory " + dirName + " has been created!");
4478                         } else {
4479                                 System.out.println("IoTCompiler: Failed to create directory " + dirName + "!");
4480                         }
4481                 } else {
4482                         System.out.println("IoTCompiler: Directory " + dirName + " exists...");
4483                 }
4484         }
4485
4486
4487         // Create a directory and possibly a sub directory
4488         private String createDirectories(String dir, String subdir) {
4489
4490                 String path = dir;
4491                 createDirectory(path);
4492                 if (subdir != null) {
4493                         path = path + "/" + subdir;
4494                         createDirectory(path);
4495                 }
4496                 return path;
4497         }
4498
4499
4500         // Inserting array members into a Map object
4501         // that maps arrKey to arrVal objects
4502         private void arraysToMap(Map map, Object[] arrKey, Object[] arrVal) {
4503
4504                 for(int i = 0; i < arrKey.length; i++) {
4505
4506                         map.put(arrKey[i], arrVal[i]);
4507                 }
4508         }
4509
4510
4511         // Return parameter category, i.e. PRIMITIVES, NONPRIMITIVES, USERDEFINED, ENUM, or STRUCT
4512         private ParamCategory getParamCategory(String paramType) {
4513
4514                 if (mapPrimitives.containsKey(paramType)) {
4515                         return ParamCategory.PRIMITIVES;
4516                 // We can either use mapNonPrimitivesJava or mapNonPrimitivesCplus here
4517                 } else if (mapNonPrimitivesJava.containsKey(getSimpleType(paramType))) {
4518                         return ParamCategory.NONPRIMITIVES;
4519                 } else if (isEnumClass(paramType)) {
4520                         return ParamCategory.ENUM;
4521                 } else if (isStructClass(paramType)) {
4522                         return ParamCategory.STRUCT;
4523                 } else
4524                         return ParamCategory.USERDEFINED;
4525         }
4526
4527
4528         // Return full class name for non-primitives to generate Java import statements
4529         // e.g. java.util.Set for Set
4530         private String getNonPrimitiveJavaClass(String paramNonPrimitives) {
4531
4532                 return mapNonPrimitivesJava.get(paramNonPrimitives);
4533         }
4534
4535
4536         // Return full class name for non-primitives to generate Cplus include statements
4537         // e.g. #include <set> for Set
4538         private String getNonPrimitiveCplusClass(String paramNonPrimitives) {
4539
4540                 return mapNonPrimitivesCplus.get(paramNonPrimitives);
4541         }
4542
4543
4544         // Get simple types, e.g. HashSet for HashSet<...>
4545         // Basically strip off the "<...>"
4546         private String getSimpleType(String paramType) {
4547
4548                 // Check if this is generics
4549                 if(paramType.contains("<")) {
4550                         String[] type = paramType.split("<");
4551                         return type[0];
4552                 } else
4553                         return paramType;
4554         }
4555
4556
4557         // Generate a set of standard classes for import statements
4558         private List<String> getStandardJavaImportClasses() {
4559
4560                 List<String> importClasses = new ArrayList<String>();
4561                 // Add the standard list first
4562                 importClasses.add("java.io.IOException");
4563                 importClasses.add("java.util.List");
4564                 importClasses.add("java.util.ArrayList");
4565                 importClasses.add("java.util.Arrays");
4566                 importClasses.add("iotrmi.Java.IoTRMICall");
4567                 importClasses.add("iotrmi.Java.IoTRMIObject");
4568
4569                 return importClasses;
4570         }
4571
4572
4573         // Generate a set of standard classes for import statements
4574         private List<String> getStandardCplusIncludeClasses() {
4575
4576                 List<String> importClasses = new ArrayList<String>();
4577                 // Add the standard list first
4578                 importClasses.add("<vector>");
4579                 importClasses.add("<set>");
4580                 importClasses.add("\"IoTRMICall.hpp\"");
4581                 importClasses.add("\"IoTRMIObject.hpp\"");
4582
4583                 return importClasses;
4584         }
4585
4586
4587         // Combine all classes for import statements
4588         private List<String> getAllLibClasses(Collection<String> stdLibClasses, Collection<String> libClasses) {
4589
4590                 List<String> allLibClasses = new ArrayList<String>(stdLibClasses);
4591                 // Iterate over the list of import classes
4592                 for (String str : libClasses) {
4593                         if (!allLibClasses.contains(str)) {
4594                                 allLibClasses.add(str);
4595                         }
4596                 }
4597                 return allLibClasses;
4598         }
4599
4600
4601
4602         // Generate a set of classes for import statements
4603         private Set<String> getImportClasses(Collection<String> methods, InterfaceDecl intDecl) {
4604
4605                 Set<String> importClasses = new HashSet<String>();
4606                 for (String method : methods) {
4607                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4608                         for (String paramType : methPrmTypes) {
4609
4610                                 String simpleType = getSimpleType(paramType);
4611                                 if (getParamCategory(simpleType) == ParamCategory.NONPRIMITIVES) {
4612                                         importClasses.add(getNonPrimitiveJavaClass(simpleType));
4613                                 }
4614                         }
4615                 }
4616                 return importClasses;
4617         }
4618
4619
4620         // Handle and return the correct enum declaration
4621         // In Java, if we declare enum in Camera interface, then it becomes "Camera.<enum>"
4622         private String getEnumParamDecl(String type, InterfaceDecl intDecl) {
4623
4624                 // Strips off array "[]" for return type
4625                 String pureType = getSimpleArrayType(type);
4626                 // Take the inner type of generic
4627                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES)
4628                         pureType = getTypeOfGeneric(type)[0];
4629                 if (isEnumClass(pureType)) {
4630                         String enumType = intDecl.getInterface() + "." + type;
4631                         return enumType;
4632                 } else
4633                         return type;
4634         }
4635
4636
4637         // Handle and return the correct type
4638         private String getEnumParam(String type, String param, int i) {
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 enumParam = "paramEnum" + i;
4647                         return enumParam;
4648                 } else
4649                         return param;
4650         }
4651
4652
4653         // Handle and return the correct enum declaration translate into int[]
4654         private String getEnumType(String type) {
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 enumType = "int[]";
4663                         return enumType;
4664                 } else
4665                         return type;
4666         }
4667
4668
4669         // Handle and return the correct struct declaration
4670         private String getStructType(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 (isStructClass(pureType)) {
4678                         String structType = "int";
4679                         return structType;
4680                 } else
4681                         return type;
4682         }
4683
4684
4685         // Check if this an enum declaration
4686         private boolean isEnumClass(String type) {
4687
4688                 // Just iterate over the set of interfaces
4689                 for (String intface : mapIntfacePTH.keySet()) {
4690                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4691                         EnumDecl enumDecl = (EnumDecl) decHandler.getEnumDecl(intface);
4692                         Set<String> setEnumDecl = enumDecl.getEnumDeclarations();
4693                         if (setEnumDecl.contains(type))
4694                                 return true;
4695                 }
4696                 return false;
4697         }
4698
4699
4700         // Check if this an struct declaration
4701         private boolean isStructClass(String type) {
4702
4703                 // Just iterate over the set of interfaces
4704                 for (String intface : mapIntfacePTH.keySet()) {
4705                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4706                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4707                         List<String> listStructDecl = structDecl.getStructTypes();
4708                         if (listStructDecl.contains(type))
4709                                 return true;
4710                 }
4711                 return false;
4712         }
4713
4714
4715         // Return a struct declaration
4716         private StructDecl getStructDecl(String type) {
4717
4718                 // Just iterate over the set of interfaces
4719                 for (String intface : mapIntfacePTH.keySet()) {
4720                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4721                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4722                         List<String> listStructDecl = structDecl.getStructTypes();
4723                         if (listStructDecl.contains(type))
4724                                 return structDecl;
4725                 }
4726                 return null;
4727         }
4728
4729
4730         // Return number of members (-1 if not found)
4731         private int getNumOfMembers(String type) {
4732
4733                 // Just iterate over the set of interfaces
4734                 for (String intface : mapIntfacePTH.keySet()) {
4735                         DeclarationHandler decHandler = mapIntDeclHand.get(intface);
4736                         StructDecl structDecl = (StructDecl) decHandler.getStructDecl(intface);
4737                         List<String> listStructDecl = structDecl.getStructTypes();
4738                         if (listStructDecl.contains(type))
4739                                 return structDecl.getNumOfMembers(type);
4740                 }
4741                 return -1;
4742         }
4743
4744
4745         // Generate a set of classes for include statements
4746         private Set<String> getIncludeClasses(Collection<String> methods, InterfaceDecl intDecl, String intface, boolean needExchange) {
4747
4748                 Set<String> includeClasses = new HashSet<String>();
4749                 for (String method : methods) {
4750
4751                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4752                         List<String> methParams = intDecl.getMethodParams(method);
4753                         for (int i = 0; i < methPrmTypes.size(); i++) {
4754
4755                                 String simpleType = getSimpleType(methPrmTypes.get(i));
4756                                 String param = methParams.get(i);
4757                                 if (getParamCategory(simpleType) == ParamCategory.NONPRIMITIVES) {
4758                                         includeClasses.add("<" + getNonPrimitiveCplusClass(simpleType) + ">");
4759                                 } else if (getParamCategory(simpleType) == ParamCategory.USERDEFINED) {
4760                                         // For original interface, we need it exchanged... not for stub interfaces
4761                                         if (needExchange) {
4762                                                 includeClasses.add("\"" + exchangeParamType(simpleType) + ".hpp\"");
4763                                                 includeClasses.add("\"" + exchangeParamType(simpleType) + "_CallbackStub.hpp\"");
4764                                         } else {
4765                                                 includeClasses.add("\"" + simpleType + ".hpp\"");
4766                                                 includeClasses.add("\"" + simpleType + "_CallbackSkeleton.hpp\"");
4767                                         }
4768                                 } else if (getParamCategory(getSimpleArrayType(simpleType)) == ParamCategory.ENUM) {
4769                                         includeClasses.add("\"" + simpleType + ".hpp\"");
4770                                 } else if (getParamCategory(getSimpleArrayType(simpleType)) == ParamCategory.STRUCT) {
4771                                         includeClasses.add("\"" + simpleType + ".hpp\"");
4772                                 } else if (param.contains("[]")) {
4773                                 // Check if this is array for C++; translate into vector
4774                                         includeClasses.add("<vector>");
4775                                 }
4776                         }
4777                 }
4778                 return includeClasses;
4779         }
4780
4781
4782         // Generate a set of callback classes
4783         private Set<String> getCallbackClasses(Collection<String> methods, InterfaceDecl intDecl) {
4784
4785                 Set<String> callbackClasses = new HashSet<String>();
4786                 for (String method : methods) {
4787
4788                         List<String> methPrmTypes = intDecl.getMethodParamTypes(method);
4789                         List<String> methParams = intDecl.getMethodParams(method);
4790                         for (int i = 0; i < methPrmTypes.size(); i++) {
4791
4792                                 String type = methPrmTypes.get(i);
4793                                 if (getParamCategory(type) == ParamCategory.USERDEFINED) {
4794                                         callbackClasses.add(type);
4795                                 } else if (getParamCategory(type) == ParamCategory.NONPRIMITIVES) {
4796                                 // Can be a List<...> of callback objects ...
4797                                         String genericType = getTypeOfGeneric(type)[0];
4798                                         if (getParamCategory(type) == ParamCategory.USERDEFINED) {
4799                                                 callbackClasses.add(type);
4800                                         }
4801                                 }
4802                         }
4803                 }
4804                 return callbackClasses;
4805         }
4806
4807
4808         // Print import statements into file
4809         private void printImportStatements(Collection<String> importClasses) {
4810
4811                 for(String cls : importClasses) {
4812                         println("import " + cls + ";");
4813                 }
4814         }
4815
4816
4817         // Print include statements into file
4818         private void printIncludeStatements(Collection<String> includeClasses) {
4819
4820                 for(String cls : includeClasses) {
4821                         println("#include " + cls);
4822                 }
4823         }
4824
4825
4826         // Get the C++ version of a non-primitive type
4827         // e.g. set for Set and map for Map
4828         // Input nonPrimitiveType has to be generics in format
4829         private String[] getTypeOfGeneric(String nonPrimitiveType) {
4830
4831                 // Handle <, >, and , for 2-type generic/template
4832                 String[] substr = nonPrimitiveType.split("<")[1].split(">")[0].split(",");
4833                 return substr;
4834         }
4835
4836
4837         // Gets generic type inside "<" and ">"
4838         private String getGenericType(String type) {
4839
4840                 // Handle <, >, and , for 2-type generic/template
4841                 if (getParamCategory(type) == ParamCategory.NONPRIMITIVES) {
4842                         String[] substr = type.split("<")[1].split(">")[0].split(",");
4843                         return substr[0];
4844                 } else
4845                         return type;
4846         }
4847
4848
4849         // This helper function strips off array declaration, e.g. int[] becomes int
4850         private String getSimpleArrayType(String type) {
4851
4852                 // Handle [ for array declaration
4853                 String substr = type;
4854                 if (type.contains("[]")) {
4855                         substr = type.split("\\[\\]")[0];
4856                 }
4857                 return substr;
4858         }
4859
4860
4861         // This helper function strips off array declaration, e.g. D[] becomes D
4862         private String getSimpleIdentifier(String ident) {
4863
4864                 // Handle [ for array declaration
4865                 String substr = ident;
4866                 if (ident.contains("[]")) {
4867                         substr = ident.split("\\[\\]")[0];
4868                 }
4869                 return substr;
4870         }
4871
4872
4873         // Checks and gets type in C++
4874         private String checkAndGetCplusType(String paramType) {
4875
4876                 if (getParamCategory(paramType) == ParamCategory.PRIMITIVES) {
4877                         return convertType(paramType);
4878                 } else if (getParamCategory(paramType) == ParamCategory.NONPRIMITIVES) {
4879
4880                         // Check for generic/template format
4881                         if (paramType.contains("<") && paramType.contains(">")) {
4882
4883                                 String genericClass = getSimpleType(paramType);
4884                                 String[] genericType = getTypeOfGeneric(paramType);
4885                                 String cplusTemplate = null;
4886                                 if (genericType.length == 1) // Generic/template with one type
4887                                         cplusTemplate = getNonPrimitiveCplusClass(genericClass) +
4888                                                 "<" + convertType(genericType[0]) + ">";
4889                                 else // Generic/template with two types
4890                                         cplusTemplate = getNonPrimitiveCplusClass(genericClass) +
4891                                                 "<" + convertType(genericType[0]) + "," + convertType(genericType[1]) + ">";
4892                                 return cplusTemplate;
4893                         } else
4894                                 return getNonPrimitiveCplusClass(paramType);
4895                 } else if(paramType.contains("[]")) {   // Array type (used for return type only)
4896                         String cArray = "vector<" + getSimpleArrayType(paramType) + ">";
4897                         return cArray;
4898                 } else if(getParamCategory(paramType) == ParamCategory.USERDEFINED) {
4899                         return paramType + "*";
4900                 } else
4901                         // Just return it as is if it's not non-primitives
4902                         return paramType;
4903                         //return checkAndGetParamClass(paramType, true);
4904         }
4905
4906
4907         // Detect array declaration, e.g. int A[],
4908         //              then generate "int A[]" in C++ as "vector<int> A"
4909         private String checkAndGetCplusArray(String paramType, String param) {
4910
4911                 String paramComplete = null;
4912                 // Check for array declaration
4913                 if (param.contains("[]")) {
4914                         paramComplete = "vector<" + paramType + "> " + param.replace("[]","");
4915                 } else
4916                         // Just return it as is if it's not an array
4917                         paramComplete = paramType + " " + param;
4918
4919                 return paramComplete;
4920         }
4921
4922
4923         // Detect array declaration, e.g. int A[],
4924         //              then generate "int A[]" in C++ as "vector<int> A"
4925         // This method just returns the type
4926         private String checkAndGetCplusArrayType(String paramType) {
4927
4928                 String paramTypeRet = null;
4929                 // Check for array declaration
4930                 if (paramType.contains("[]")) {
4931                         String type = paramType.split("\\[\\]")[0];
4932                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4933                 } else if (paramType.contains("vector")) {
4934                         // Just return it as is if it's not an array
4935                         String type = paramType.split("<")[1].split(">")[0];
4936                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4937                 } else
4938                         paramTypeRet = paramType;
4939
4940                 return paramTypeRet;
4941         }
4942
4943
4944         // Detect array declaration, e.g. int A[],
4945         //              then generate "int A[]" in C++ as "vector<int> A"
4946         // This method just returns the type
4947         private String checkAndGetCplusArrayType(String paramType, String param) {
4948
4949                 String paramTypeRet = null;
4950                 // Check for array declaration
4951                 if (param.contains("[]")) {
4952                         paramTypeRet = checkAndGetCplusType(paramType) + "[]";
4953                 } else if (paramType.contains("vector")) {
4954                         // Just return it as is if it's not an array
4955                         String type = paramType.split("<")[1].split(">")[0];
4956                         paramTypeRet = checkAndGetCplusType(type) + "[]";
4957                 } else
4958                         paramTypeRet = paramType;
4959
4960                 return paramTypeRet;
4961         }
4962
4963
4964         // Detect array declaration, e.g. int A[],
4965         //              then generate type "int[]"
4966         private String checkAndGetArray(String paramType, String param) {
4967
4968                 String paramTypeRet = null;
4969                 // Check for array declaration
4970                 if (param.contains("[]")) {
4971                         paramTypeRet = paramType + "[]";
4972                 } else
4973                         // Just return it as is if it's not an array
4974                         paramTypeRet = paramType;
4975
4976                 return paramTypeRet;
4977         }
4978
4979
4980         // Is array or list?
4981         private boolean isArrayOrList(String paramType, String param) {
4982
4983                 // Check for array declaration
4984                 if (isArray(param))
4985                         return true;
4986                 else if (isList(paramType))
4987                         return true;
4988                 else
4989                         return false;
4990         }
4991
4992
4993         // Is array?
4994         // For return type we use retType as input parameter
4995         private boolean isArray(String param) {
4996
4997                 // Check for array declaration
4998                 if (param.contains("[]"))
4999                         return true;
5000                 else
5001                         return false;
5002         }
5003
5004
5005         // Is list?
5006         private boolean isList(String paramType) {
5007
5008                 // Check for array declaration
5009                 if (paramType.contains("List"))
5010                         return true;
5011                 else
5012                         return false;
5013         }
5014
5015
5016         // Get the right type for a callback object
5017         private String checkAndGetParamClass(String paramType) {
5018
5019                 // Check if this is generics
5020                 if(getParamCategory(paramType) == ParamCategory.USERDEFINED) {
5021                         return exchangeParamType(paramType);
5022                 } else
5023                         return paramType;
5024         }
5025
5026
5027         // Returns the other interface for type-checking purposes for USERDEFINED
5028         //              classes based on the information provided in multiple policy files
5029         // e.g. return CameraWithXXX instead of Camera
5030         private String exchangeParamType(String intface) {
5031
5032                 // Param type that's passed is the interface name we need to look for
5033                 //              in the map of interfaces, based on available policy files.
5034                 DeclarationHandler decHandler = mapIntDeclHand.get(intface);
5035                 if (decHandler != null) {
5036                 // We've found the required interface policy files
5037                         RequiresDecl reqDecl = (RequiresDecl) decHandler.getRequiresDecl(intface);
5038                         Set<String> setExchInt = reqDecl.getInterfaces();
5039                         if (setExchInt.size() == 1) {
5040                                 Iterator iter = setExchInt.iterator();
5041                                 return (String) iter.next();
5042                         } else {
5043                                 throw new Error("IoTCompiler: Ambiguous stub interfaces: " + setExchInt.toString() +
5044                                         ". Only one new interface can be declared if the object " + intface +
5045                                         " needs to be passed in as an input parameter!");
5046                         }
5047                 } else {
5048                 // NULL value - this means policy files missing
5049                         throw new Error("IoTCompiler: Parameter type lookup failed for " + intface +
5050                                 "... Please provide the necessary policy files for user-defined types." +
5051                                 " If this is an array please type the brackets after the variable name," +
5052                                 " e.g. \"String str[]\", not \"String[] str\"." +
5053                                 " If this is a Collections (Java) / STL (C++) type, this compiler only" +
5054                                 " supports List/ArrayList (Java) or list (C++).");
5055                 }
5056         }
5057
5058
5059         public static void main(String[] args) throws Exception {
5060
5061                 // If there is no argument or just "--help" or "-h", then invoke printUsage()
5062                 if ((args[0].equals("-help") ||
5063                          args[0].equals("--help")||
5064                          args[0].equals("-h"))   ||
5065                         (args.length == 0)) {
5066
5067                         IoTCompiler.printUsage();
5068
5069                 } else if (args.length > 1) {
5070
5071                         IoTCompiler comp = new IoTCompiler();
5072                         int i = 0;
5073                         do {
5074                                 // Parse main policy file
5075                                 ParseNode pnPol = IoTCompiler.parseFile(args[i]);
5076                                 // Parse "requires" policy file
5077                                 ParseNode pnReq = IoTCompiler.parseFile(args[i+1]);
5078                                 // Get interface name
5079                                 String intface = ParseTreeHandler.getOrigIntface(pnPol);
5080                                 comp.setDataStructures(intface, pnPol, pnReq);
5081                                 comp.getMethodsForIntface(intface);
5082                                 i = i + 2;
5083                         // 1) Check if this is the last option before "-java" or "-cplus"
5084                         // 2) Check if this is really the last option (no "-java" or "-cplus")
5085                         } while(!args[i].equals("-java") &&
5086                                         !args[i].equals("-cplus") &&
5087                                         (i < args.length));
5088
5089                         // Generate everything if we don't see "-java" or "-cplus"
5090                         if (i == args.length) {
5091                                 comp.generateEnumJava();
5092                                 comp.generateStructJava();
5093                                 comp.generateJavaLocalInterfaces();
5094                                 comp.generateJavaInterfaces();
5095                                 comp.generateJavaStubClasses();
5096                                 comp.generateJavaCallbackStubClasses();
5097                                 comp.generateJavaSkeletonClass();
5098                                 comp.generateJavaCallbackSkeletonClass();
5099                                 comp.generateEnumCplus();
5100                                 comp.generateStructCplus();
5101                                 comp.generateCplusLocalInterfaces();
5102                                 comp.generateCPlusInterfaces();
5103                                 comp.generateCPlusStubClasses();
5104                                 comp.generateCPlusCallbackStubClasses();
5105                                 comp.generateCplusSkeletonClass();
5106                                 comp.generateCplusCallbackSkeletonClass();
5107                         } else {
5108                         // Check other options
5109                                 while(i < args.length) {
5110                                         // Error checking
5111                                         if (!args[i].equals("-java") &&
5112                                                 !args[i].equals("-cplus")) {
5113                                                 throw new Error("IoTCompiler: ERROR - unrecognized command line option: " + args[i]);
5114                                         } else {
5115                                                 if (i + 1 < args.length) {
5116                                                         comp.setDirectory(args[i+1]);
5117                                                 } else
5118                                                         throw new Error("IoTCompiler: ERROR - please provide <directory> after option: " + args[i]);
5119
5120                                                 if (args[i].equals("-java")) {
5121                                                         comp.generateEnumJava();
5122                                                         comp.generateStructJava();
5123                                                         comp.generateJavaLocalInterfaces();
5124                                                         comp.generateJavaInterfaces();
5125                                                         comp.generateJavaStubClasses();
5126                                                         comp.generateJavaCallbackStubClasses();
5127                                                         comp.generateJavaSkeletonClass();
5128                                                         comp.generateJavaCallbackSkeletonClass();
5129                                                 } else {
5130                                                         comp.generateEnumCplus();
5131                                                         comp.generateStructCplus();
5132                                                         comp.generateCplusLocalInterfaces();
5133                                                         comp.generateCPlusInterfaces();
5134                                                         comp.generateCPlusStubClasses();
5135                                                         comp.generateCPlusCallbackStubClasses();
5136                                                         comp.generateCplusSkeletonClass();
5137                                                         comp.generateCplusCallbackSkeletonClass();
5138                                                 }
5139                                         }
5140                                         i = i + 2;
5141                                 }
5142                         }
5143                 } else {
5144                 // Need to at least have exactly 2 parameters, i.e. main policy file and requires file
5145                         IoTCompiler.printUsage();
5146                         throw new Error("IoTCompiler: At least two arguments (main and requires policy files) have to be provided!");
5147                 }
5148         }
5149 }
5150
5151