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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.CodeStream;
  15 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  16 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.LocalTypeBinding;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
  21 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  22
  23 public class QualifiedAllocationExpression extends AllocationExpression {
  24
  25         //qualification may be on both side
  26         public Expression enclosingInstance;
  27         public AnonymousLocalTypeDeclaration anonymousType;
  28
  29         public QualifiedAllocationExpression() {
  30         }
  31
  32         public QualifiedAllocationExpression(AnonymousLocalTypeDeclaration anonymousType) {
  33                 this.anonymousType = anonymousType;
  34         }
  35
  36         public FlowInfo analyseCode(
  37                 BlockScope currentScope,
  38                 FlowContext flowContext,
  39                 FlowInfo flowInfo) {
  40
  41                 // variation on allocation, where can be specified an enclosing instance and an anonymous type
  42
  43                 // analyse the enclosing instance
  44                 if (enclosingInstance != null) {
  45                         flowInfo = enclosingInstance.analyseCode(currentScope, flowContext, flowInfo);
  46                 }
  47                 // process arguments
  48                 if (arguments != null) {
  49                         for (int i = 0, count = arguments.length; i < count; i++) {
  50                                 flowInfo = arguments[i].analyseCode(currentScope, flowContext, flowInfo);
  51                         }
  52                 }
  53
  54                 // analyse the anonymous nested type
  55                 if (anonymousType != null) {
  56                         flowInfo = anonymousType.analyseCode(currentScope, flowContext, flowInfo);
  57                 }
  58
  59                 // record some dependency information for exception types
  60                 ReferenceBinding[] thrownExceptions;
  61                 if (((thrownExceptions = binding.thrownExceptions).length) != 0) {
  62                         // check exception handling
  63                         flowContext.checkExceptionHandlers(
  64                                 thrownExceptions,
  65                                 this,
  66                                 flowInfo,
  67                                 currentScope);
  68                 }
  69                 manageEnclosingInstanceAccessIfNecessary(currentScope);
  70                 manageSyntheticAccessIfNecessary(currentScope);
  71                 return flowInfo;
  72         }
  73
  74         public Expression enclosingInstance() {
  75
  76                 return enclosingInstance;
  77         }
  78
  79         public void generateCode(
  80                 BlockScope currentScope,
  81                 CodeStream codeStream,
  82                 boolean valueRequired) {
  83
  84                 int pc = codeStream.position;
  85                 ReferenceBinding allocatedType = binding.declaringClass;
  86                 if (allocatedType.isLocalType()) {
  87                         LocalTypeBinding localType = (LocalTypeBinding) allocatedType;
  88                         localType.constantPoolName(
  89                                 codeStream.classFile.outerMostEnclosingClassFile().computeConstantPoolName(
  90                                         localType));
  91                 }
  92                 codeStream.new_(allocatedType);
  93                 if (valueRequired) {
  94                         codeStream.dup();
  95                 }
  96                 // better highlight for allocation: display the type individually
  97                 codeStream.recordPositionsFrom(pc, type.sourceStart);
  98
  99                 // handling innerclass instance allocation
 100                 if (allocatedType.isNestedType()) {
 101                         // make sure its name is computed before arguments, since may be necessary for argument emulation
 102                         codeStream.generateSyntheticArgumentValues(
 103                                 currentScope,
 104                                 allocatedType,
 105                                 enclosingInstance(),
 106                                 this);
 107                 }
 108                 // generate the arguments for constructor
 109                 if (arguments != null) {
 110                         for (int i = 0, count = arguments.length; i < count; i++) {
 111                                 arguments[i].generateCode(currentScope, codeStream, true);
 112                         }
 113                 }
 114                 // invoke constructor
 115                 if (syntheticAccessor == null) {
 116                         codeStream.invokespecial(binding);
 117                 } else {
 118                         // synthetic accessor got some extra arguments appended to its signature, which need values
 119                         for (int i = 0,
 120                                 max = syntheticAccessor.parameters.length - binding.parameters.length;
 121                                 i < max;
 122                                 i++) {
 123                                 codeStream.aconst_null();
 124                         }
 125                         codeStream.invokespecial(syntheticAccessor);
 126                 }
 127                 codeStream.recordPositionsFrom(pc, this.sourceStart);
 128                 if (anonymousType != null) {
 129                         anonymousType.generateCode(currentScope, codeStream);
 130                 }
 131         }
 132
 133         public boolean isSuperAccess() {
 134
 135                 // necessary to lookup super constructor of anonymous type
 136                 return anonymousType != null;
 137         }
 138
 139         /* Inner emulation consists in either recording a dependency
 140          * link only, or performing one level of propagation.
 141          *
 142          * Dependency mechanism is used whenever dealing with source target
 143          * types, since by the time we reach them, we might not yet know their
 144          * exact need.
 145          */
 146         public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
 147
 148                 ReferenceBinding allocatedType;
 149
 150                 // perform some emulation work in case there is some and we are inside a local type only
 151                 if ((allocatedType = binding.declaringClass).isNestedType()
 152                         && currentScope.enclosingSourceType().isLocalType()) {
 153
 154                         if (allocatedType.isLocalType()) {
 155                                 ((LocalTypeBinding) allocatedType).addInnerEmulationDependent(
 156                                         currentScope,
 157                                         enclosingInstance != null,
 158                                         false);
 159                                 // request cascade of accesses
 160                         } else {
 161                                 // locally propagate, since we already now the desired shape for sure
 162                                 currentScope.propagateInnerEmulation(
 163                                         allocatedType,
 164                                         enclosingInstance != null,
 165                                         false);
 166                                 // request cascade of accesses
 167                         }
 168                 }
 169         }
 170
 171         public TypeBinding resolveType(BlockScope scope) {
 172
 173                 if (anonymousType == null && enclosingInstance == null)
 174                         return super.resolveType(scope);
 175                 // added for code assist... is not possible with 'normal' code
 176
 177                 // Propagate the type checking to the arguments, and checks if the constructor is defined.
 178
 179                 // ClassInstanceCreationExpression ::= Primary '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
 180                 // ClassInstanceCreationExpression ::= Name '.' 'new' SimpleName '(' ArgumentListopt ')' ClassBodyopt
 181                 // ==> by construction, when there is an enclosing instance the typename may NOT be qualified
 182                 // ==> therefore by construction the type is always a SingleTypeReferenceType instead of being either
 183                 // sometime a SingleTypeReference and sometime a QualifedTypeReference
 184
 185                 constant = NotAConstant;
 186                 TypeBinding enclosingInstTb = null;
 187                 TypeBinding recType;
 188                 if (anonymousType == null) {
 189                         //----------------no anonymous class------------------------
 190                         if ((enclosingInstTb = enclosingInstance.resolveType(scope)) == null)
 191                                 return null;
 192                         if (enclosingInstTb.isBaseType() | enclosingInstTb.isArrayType()) {
 193                                 scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
 194                                         enclosingInstTb,
 195                                         enclosingInstance);
 196                                 return null;
 197                         }
 198                         recType =
 199                                 ((SingleTypeReference) type).resolveTypeEnclosing(
 200                                         scope,
 201                                         (ReferenceBinding) enclosingInstTb);
 202                         // will check for null after args are resolved
 203                         TypeBinding[] argumentTypes = NoParameters;
 204                         if (arguments != null) {
 205                                 boolean argHasError = false;
 206                                 int length = arguments.length;
 207                                 argumentTypes = new TypeBinding[length];
 208                                 for (int i = 0; i < length; i++)
 209                                         if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null)
 210                                                 argHasError = true;
 211                                 if (argHasError)
 212                                         return recType;
 213                         }
 214                         if (recType == null)
 215                                 return null;
 216                         if (!recType.canBeInstantiated()) {
 217                                 scope.problemReporter().cannotInstantiate(type, recType);
 218                                 return recType;
 219                         }
 220                         if ((binding =
 221                                 scope.getConstructor((ReferenceBinding) recType, argumentTypes, this))
 222                                 .isValidBinding()) {
 223                                 if (isMethodUseDeprecated(binding, scope))
 224                                         scope.problemReporter().deprecatedMethod(binding, this);
 225
 226                                 if (arguments != null)
 227                                         for (int i = 0; i < arguments.length; i++)
 228                                                 arguments[i].implicitWidening(binding.parameters[i], argumentTypes[i]);
 229                         } else {
 230                                 if (binding.declaringClass == null)
 231                                         binding.declaringClass = (ReferenceBinding) recType;
 232                                 scope.problemReporter().invalidConstructor(this, binding);
 233                                 return recType;
 234                         }
 235
 236                         // The enclosing instance must be compatible with the innermost enclosing type
 237                         ReferenceBinding expectedType = binding.declaringClass.enclosingType();
 238                         if (BlockScope.areTypesCompatible(enclosingInstTb, expectedType))
 239                                 return recType;
 240                         scope.problemReporter().typeMismatchErrorActualTypeExpectedType(
 241                                 enclosingInstance,
 242                                 enclosingInstTb,
 243                                 expectedType);
 244                         return recType;
 245                 }
 246
 247                 //--------------there is an anonymous type declaration-----------------
 248                 if (enclosingInstance != null) {
 249                         if ((enclosingInstTb = enclosingInstance.resolveType(scope)) == null)
 250                                 return null;
 251                         if (enclosingInstTb.isBaseType() | enclosingInstTb.isArrayType()) {
 252                                 scope.problemReporter().illegalPrimitiveOrArrayTypeForEnclosingInstance(
 253                                         enclosingInstTb,
 254                                         enclosingInstance);
 255                                 return null;
 256                         }
 257                 }
 258                 // due to syntax-construction, recType is a ReferenceBinding
 259                 recType =
 260                         (enclosingInstance == null)
 261                                 ? type.resolveType(scope)
 262                                 : ((SingleTypeReference) type).resolveTypeEnclosing(
 263                                         scope,
 264                                         (ReferenceBinding) enclosingInstTb);
 265                 if (recType == null)
 266                         return null;
 267                 if (((ReferenceBinding) recType).isFinal()) {
 268                         scope.problemReporter().anonymousClassCannotExtendFinalClass(type, recType);
 269                         return null;
 270                 }
 271                 TypeBinding[] argumentTypes = NoParameters;
 272                 if (arguments != null) {
 273                         int length = arguments.length;
 274                         argumentTypes = new TypeBinding[length];
 275                         for (int i = 0; i < length; i++)
 276                                 if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null)
 277                                         return null;
 278                 }
 279
 280                 // an anonymous class inherits from java.lang.Object when declared "after" an interface
 281                 ReferenceBinding superBinding =
 282                         recType.isInterface() ? scope.getJavaLangObject() : (ReferenceBinding) recType;
 283                 MethodBinding inheritedBinding =
 284                         scope.getConstructor(superBinding, argumentTypes, this);
 285                 if (!inheritedBinding.isValidBinding()) {
 286                         if (inheritedBinding.declaringClass == null)
 287                                 inheritedBinding.declaringClass = superBinding;
 288                         scope.problemReporter().invalidConstructor(this, inheritedBinding);
 289                         return null;
 290                 }
 291                 if (enclosingInstance != null) {
 292                         if (!BlockScope
 293                                 .areTypesCompatible(
 294                                         enclosingInstTb,
 295                                         inheritedBinding.declaringClass.enclosingType())) {
 296                                 scope.problemReporter().typeMismatchErrorActualTypeExpectedType(
 297                                         enclosingInstance,
 298                                         enclosingInstTb,
 299                                         inheritedBinding.declaringClass.enclosingType());
 300                                 return null;
 301                         }
 302                 }
 303
 304                 // this promotion has to be done somewhere: here or inside the constructor of the
 305                 // anonymous class. We do it here while the constructor of the inner is then easier.
 306                 if (arguments != null)
 307                         for (int i = 0; i < arguments.length; i++)
 308                                 arguments[i].implicitWidening(inheritedBinding.parameters[i], argumentTypes[i]);
 309
 310                 // Update the anonymous inner class : superclass, interface
 311                 scope.addAnonymousType(anonymousType, (ReferenceBinding) recType);
 312                 anonymousType.resolve(scope);
 313                 binding = anonymousType.createsInternalConstructorWithBinding(inheritedBinding);
 314                 return anonymousType.binding; // 1.2 change
 315         }
 316
 317         public String toStringExpression(int tab) {
 318
 319                 String s = ""; //$NON-NLS-1$
 320                 if (enclosingInstance != null)
 321                         s += enclosingInstance.toString() + "."; //$NON-NLS-1$
 322                 s += super.toStringExpression(tab);
 323                 if (anonymousType != null) {
 324                         s += anonymousType.toString(tab);
 325                 } //allows to restart just after the } one line under ....
 326                 return s;
 327         }
 328
 329         public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
 330
 331                 if (visitor.visit(this, scope)) {
 332                         if (enclosingInstance != null)
 333                                 enclosingInstance.traverse(visitor, scope);
 334                         type.traverse(visitor, scope);
 335                         if (arguments != null) {
 336                                 int argumentsLength = arguments.length;
 337                                 for (int i = 0; i < argumentsLength; i++)
 338                                         arguments[i].traverse(visitor, scope);
 339                         }
 340                         if (anonymousType != null)
 341                                 anonymousType.traverse(visitor, scope);
 342                 }
 343                 visitor.endVisit(this, scope);
 344         }
 345 }