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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.codegen.*;
  15 import net.sourceforge.phpdt.internal.compiler.flow.*;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.*;
  17
  18 public class QualifiedAllocationExpression extends AllocationExpression {
  19
  20         //qualification may be on both side
  21         public Expression enclosingInstance;
  22         public AnonymousLocalTypeDeclaration anonymousType;
  23
  24         public QualifiedAllocationExpression() {
  25         }
  26
  27         public QualifiedAllocationExpression(AnonymousLocalTypeDeclaration anonymousType) {
  28                 this.anonymousType = anonymousType;
  29         }
  30
  31         public FlowInfo analyseCode(
  32                 BlockScope currentScope,
  33                 FlowContext flowContext,
  34                 FlowInfo flowInfo) {
  35
  36                 // variation on allocation, where can be specified an enclosing instance and an anonymous type
  37
  38                 // analyse the enclosing instance
  39                 if (enclosingInstance != null) {
  40                         flowInfo = enclosingInstance.analyseCode(currentScope, flowContext, flowInfo);
  41                 }
  42                 // process arguments
  43                 if (arguments != null) {
  44                         for (int i = 0, count = arguments.length; i < count; i++) {
  45                                 flowInfo = arguments[i].analyseCode(currentScope, flowContext, flowInfo);
  46                         }
  47                 }
  48
  49                 // analyse the anonymous nested type
  50                 if (anonymousType != null) {
  51                         flowInfo = anonymousType.analyseCode(currentScope, flowContext, flowInfo);
  52                 }
  53
  54                 // record some dependency information for exception types
  55                 ReferenceBinding[] thrownExceptions;
  56                 if (((thrownExceptions = binding.thrownExceptions).length) != 0) {
  57                         // check exception handling
  58                         flowContext.checkExceptionHandlers(
  59                                 thrownExceptions,
  60                                 this,
  61                                 flowInfo,
  62                                 currentScope);
  63                 }
  64                 manageEnclosingInstanceAccessIfNecessary(currentScope);
  65                 manageSyntheticAccessIfNecessary(currentScope);
  66                 return flowInfo;
  67         }
  68
  69         public Expression enclosingInstance() {
  70
  71                 return enclosingInstance;
  72         }
  73
  74         public void generateCode(
  75                 BlockScope currentScope,
  76                 CodeStream codeStream,
  77                 boolean valueRequired) {
  78
  79                 int pc = codeStream.position;
  80                 ReferenceBinding allocatedType = binding.declaringClass;
  81                 if (allocatedType.isLocalType()) {
  82                         LocalTypeBinding localType = (LocalTypeBinding) allocatedType;
  83                         localType.constantPoolName(
  84                                 codeStream.classFile.outerMostEnclosingClassFile().computeConstantPoolName(
  85                                         localType));
  86                 }
  87                 codeStream.new_(allocatedType);
  88                 if (valueRequired) {
  89                         codeStream.dup();
  90                 }
  91                 // better highlight for allocation: display the type individually
  92                 codeStream.recordPositionsFrom(pc, type.sourceStart);
  93
  94                 // handling innerclass instance allocation
  95                 if (allocatedType.isNestedType()) {
  96                         // make sure its name is computed before arguments, since may be necessary for argument emulation
  97                         codeStream.generateSyntheticArgumentValues(
  98                                 currentScope,
  99                                 allocatedType,
 100                                 enclosingInstance(),
 101                                 this);
 102                 }
 103                 // generate the arguments for constructor
 104                 if (arguments != null) {
 105                         for (int i = 0, count = arguments.length; i < count; i++) {
 106                                 arguments[i].generateCode(currentScope, codeStream, true);
 107                         }
 108                 }
 109                 // invoke constructor
 110                 if (syntheticAccessor == null) {
 111                         codeStream.invokespecial(binding);
 112                 } else {
 113                         // synthetic accessor got some extra arguments appended to its signature, which need values
 114                         for (int i = 0,
 115                                 max = syntheticAccessor.parameters.length - binding.parameters.length;
 116                                 i < max;
 117                                 i++) {
 118                                 codeStream.aconst_null();
 119                         }
 120                         codeStream.invokespecial(syntheticAccessor);
 121                 }
 122                 codeStream.recordPositionsFrom(pc, this.sourceStart);
 123                 if (anonymousType != null) {
 124                         anonymousType.generateCode(currentScope, codeStream);
 125                 }
 126         }
 127
 128         public boolean isSuperAccess() {
 129
 130                 // necessary to lookup super constructor of anonymous type
 131                 return anonymousType != null;
 132         }
 133
 134         /* Inner emulation consists in either recording a dependency
 135          * link only, or performing one level of propagation.
 136          *
 137          * Dependency mechanism is used whenever dealing with source target
 138          * types, since by the time we reach them, we might not yet know their
 139          * exact need.
 140          */
 141         public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
 142
 143                 ReferenceBinding allocatedType;
 144
 145                 // perform some emulation work in case there is some and we are inside a local type only
 146                 if ((allocatedType = binding.declaringClass).isNestedType()
 147                         && currentScope.enclosingSourceType().isLocalType()) {
 148
 149                         if (allocatedType.isLocalType()) {
 150                                 ((LocalTypeBinding) allocatedType).addInnerEmulationDependent(
 151                                         currentScope,
 152                                         enclosingInstance != null,
 153                                         false);
 154                                 // request cascade of accesses
 155                         } else {
 156                                 // locally propagate, since we already now the desired shape for sure
 157                                 currentScope.propagateInnerEmulation(
 158                                         allocatedType,
 159                                         enclosingInstance != null,
 160                                         false);
 161                                 // request cascade of accesses
 162                         }
 163                 }
 164         }
 165
 166         public TypeBinding resolveType(BlockScope scope) {
 167
 168                 if (anonymousType == null && enclosingInstance == null)
 169                         return super.resolveType(scope);
 170                 // added for code assist... is not possible with 'normal' code
 171
 172                 // Propagate the type checking to the arguments, and checks if the constructor is defined.
 173
 174                 // ClassInstanceCreationExpression ::= Primary '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
 175                 // ClassInstanceCreationExpression ::= Name '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
 176                 // ==> by construction, when there is an enclosing instance the typename may NOT be qualified
 177                 // ==> therefore by construction the type is always a SingleTypeReferenceType instead of being either
 178                 // sometime a SingleTypeReference and sometime a QualifedTypeReference
 179
 180                 constant = NotAConstant;
 181                 TypeBinding enclosingInstTb = null;
 182                 TypeBinding recType;
 183                 if (anonymousType == null) {
 184                         //----------------no anonymous class------------------------
 185                         if ((enclosingInstTb = enclosingInstance.resolveType(scope)) == null)
 186                                 return null;
 187                         if (enclosingInstTb.isBaseType() | enclosingInstTb.isArrayType()) {
 188                                 scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
 189                                         enclosingInstTb,
 190                                         enclosingInstance);
 191                                 return null;
 192                         }
 193                         recType =
 194                                 ((SingleTypeReference) type).resolveTypeEnclosing(
 195                                         scope,
 196                                         (ReferenceBinding) enclosingInstTb);
 197                         // will check for null after args are resolved
 198                         TypeBinding[] argumentTypes = NoParameters;
 199                         if (arguments != null) {
 200                                 boolean argHasError = false;
 201                                 int length = arguments.length;
 202                                 argumentTypes = new TypeBinding[length];
 203                                 for (int i = 0; i < length; i++)
 204                                         if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null)
 205                                                 argHasError = true;
 206                                 if (argHasError)
 207                                         return recType;
 208                         }
 209                         if (recType == null)
 210                                 return null;
 211                         if (!recType.canBeInstantiated()) {
 212                                 scope.problemReporter().cannotInstantiate(type, recType);
 213                                 return recType;
 214                         }
 215                         if ((binding =
 216                                 scope.getConstructor((ReferenceBinding) recType, argumentTypes, this))
 217                                 .isValidBinding()) {
 218                                 if (isMethodUseDeprecated(binding, scope))
 219                                         scope.problemReporter().deprecatedMethod(binding, this);
 220
 221                                 if (arguments != null)
 222                                         for (int i = 0; i < arguments.length; i++)
 223                                                 arguments[i].implicitWidening(binding.parameters[i], argumentTypes[i]);
 224                         } else {
 225                                 if (binding.declaringClass == null)
 226                                         binding.declaringClass = (ReferenceBinding) recType;
 227                                 scope.problemReporter().invalidConstructor(this, binding);
 228                                 return recType;
 229                         }
 230
 231                         // The enclosing instance must be compatible with the innermost enclosing type
 232                         ReferenceBinding expectedType = binding.declaringClass.enclosingType();
 233                         if (scope.areTypesCompatible(enclosingInstTb, expectedType))
 234                                 return recType;
 235                         scope.problemReporter().typeMismatchErrorActualTypeExpectedType(
 236                                 enclosingInstance,
 237                                 enclosingInstTb,
 238                                 expectedType);
 239                         return recType;
 240                 }
 241
 242                 //--------------there is an anonymous type declaration-----------------
 243                 if (enclosingInstance != null) {
 244                         if ((enclosingInstTb = enclosingInstance.resolveType(scope)) == null)
 245                                 return null;
 246                         if (enclosingInstTb.isBaseType() | enclosingInstTb.isArrayType()) {
 247                                 scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
 248                                         enclosingInstTb,
 249                                         enclosingInstance);
 250                                 return null;
 251                         }
 252                 }
 253                 // due to syntax-construction, recType is a ReferenceBinding
 254                 recType =
 255                         (enclosingInstance == null)
 256                                 ? type.resolveType(scope)
 257                                 : ((SingleTypeReference) type).resolveTypeEnclosing(
 258                                         scope,
 259                                         (ReferenceBinding) enclosingInstTb);
 260                 if (recType == null)
 261                         return null;
 262                 if (((ReferenceBinding) recType).isFinal()) {
 263                         scope.problemReporter().anonymousClassCannotExtendFinalClass(type, recType);
 264                         return null;
 265                 }
 266                 TypeBinding[] argumentTypes = NoParameters;
 267                 if (arguments != null) {
 268                         int length = arguments.length;
 269                         argumentTypes = new TypeBinding[length];
 270                         for (int i = 0; i < length; i++)
 271                                 if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null)
 272                                         return null;
 273                 }
 274
 275                 // an anonymous class inherits from java.lang.Object when declared "after" an interface
 276                 ReferenceBinding superBinding =
 277                         recType.isInterface() ? scope.getJavaLangObject() : (ReferenceBinding) recType;
 278                 MethodBinding inheritedBinding =
 279                         scope.getConstructor(superBinding, argumentTypes, this);
 280                 if (!inheritedBinding.isValidBinding()) {
 281                         if (inheritedBinding.declaringClass == null)
 282                                 inheritedBinding.declaringClass = superBinding;
 283                         scope.problemReporter().invalidConstructor(this, inheritedBinding);
 284                         return null;
 285                 }
 286                 if (enclosingInstance != null) {
 287                         if (!scope
 288                                 .areTypesCompatible(
 289                                         enclosingInstTb,
 290                                         inheritedBinding.declaringClass.enclosingType())) {
 291                                 scope.problemReporter().typeMismatchErrorActualTypeExpectedType(
 292                                         enclosingInstance,
 293                                         enclosingInstTb,
 294                                         inheritedBinding.declaringClass.enclosingType());
 295                                 return null;
 296                         }
 297                 }
 298
 299                 // this promotion has to be done somewhere: here or inside the constructor of the
 300                 // anonymous class. We do it here while the constructor of the inner is then easier.
 301                 if (arguments != null)
 302                         for (int i = 0; i < arguments.length; i++)
 303                                 arguments[i].implicitWidening(inheritedBinding.parameters[i], argumentTypes[i]);
 304
 305                 // Update the anonymous inner class : superclass, interface
 306                 scope.addAnonymousType(anonymousType, (ReferenceBinding) recType);
 307                 anonymousType.resolve(scope);
 308                 binding = anonymousType.createsInternalConstructorWithBinding(inheritedBinding);
 309                 return anonymousType.binding; // 1.2 change
 310         }
 311
 312         public String toStringExpression(int tab) {
 313
 314                 String s = ""; //$NON-NLS-1$
 315                 if (enclosingInstance != null)
 316                         s += enclosingInstance.toString() + "."; //$NON-NLS-1$
 317                 s += super.toStringExpression(tab);
 318                 if (anonymousType != null) {
 319                         s += anonymousType.toString(tab);
 320                 } //allows to restart just after the } one line under ....
 321                 return s;
 322         }
 323
 324         public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
 325
 326                 if (visitor.visit(this, scope)) {
 327                         if (enclosingInstance != null)
 328                                 enclosingInstance.traverse(visitor, scope);
 329                         type.traverse(visitor, scope);
 330                         if (arguments != null) {
 331                                 int argumentsLength = arguments.length;
 332                                 for (int i = 0; i < argumentsLength; i++)
 333                                         arguments[i].traverse(visitor, scope);
 334                         }
 335                         if (anonymousType != null)
 336                                 anonymousType.traverse(visitor, scope);
 337                 }
 338                 visitor.endVisit(this, scope);
 339         }
 340 }