net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/AllocationExpression.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.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.ASTVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  15 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.InvocationSite;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.LocalTypeBinding;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.LocalVariableBinding;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
  21 import net.sourceforge.phpdt.internal.compiler.lookup.NestedTypeBinding;
  22 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
  23 import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
  24 import net.sourceforge.phpdt.internal.compiler.lookup.SyntheticArgumentBinding;
  25 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  26
  27 public class AllocationExpression
  28         extends Expression
  29         implements InvocationSite {
  30
  31         public TypeReference type;
  32         public Expression[] arguments;
  33         public MethodBinding binding;
  34
  35         MethodBinding syntheticAccessor;
  36
  37         public AllocationExpression() {
  38         }
  39
  40         public FlowInfo analyseCode(
  41                 BlockScope currentScope,
  42                 FlowContext flowContext,
  43                 FlowInfo flowInfo) {
  44
  45                 // check captured variables are initialized in current context (26134)
  46                 checkCapturedLocalInitializationIfNecessary(this.binding.declaringClass, currentScope, flowInfo);
  47
  48                 // process arguments
  49                 if (arguments != null) {
  50                         for (int i = 0, count = arguments.length; i < count; i++) {
  51                                 flowInfo =
  52                                         arguments[i]
  53                                                 .analyseCode(currentScope, flowContext, flowInfo)
  54                                                 .unconditionalInits();
  55                         }
  56                 }
  57                 // record some dependency information for exception types
  58                 ReferenceBinding[] thrownExceptions;
  59                 if (((thrownExceptions = this.binding.thrownExceptions).length) != 0) {
  60                         // check exception handling
  61                         flowContext.checkExceptionHandlers(
  62                                 thrownExceptions,
  63                                 this,
  64                                 flowInfo,
  65                                 currentScope);
  66                 }
  67                 manageEnclosingInstanceAccessIfNecessary(currentScope);
  68                 manageSyntheticAccessIfNecessary(currentScope);
  69
  70                 return flowInfo;
  71         }
  72
  73         public void checkCapturedLocalInitializationIfNecessary(ReferenceBinding checkedType, BlockScope currentScope, FlowInfo flowInfo) {
  74
  75                 if (checkedType.isLocalType()
  76                                 && !checkedType.isAnonymousType()
  77                                 && !currentScope.isDefinedInType(checkedType)) { // only check external allocations
  78                         NestedTypeBinding nestedType = (NestedTypeBinding) checkedType;
  79                         SyntheticArgumentBinding[] syntheticArguments = nestedType.syntheticOuterLocalVariables();
  80                         if (syntheticArguments != null)
  81                                 for (int i = 0, count = syntheticArguments.length; i < count; i++){
  82                                         SyntheticArgumentBinding syntheticArgument = syntheticArguments[i];
  83                                         LocalVariableBinding targetLocal;
  84                                         if ((targetLocal = syntheticArgument.actualOuterLocalVariable) == null) continue;
  85 //                                      if (targetLocal.declaration != null && !flowInfo.isDefinitelyAssigned(targetLocal)){
  86 //                                              currentScope.problemReporter().uninitializedLocalVariable(targetLocal, this);
  87 //                                      }
  88                                 }
  89
  90                 }
  91         }
  92
  93         public Expression enclosingInstance() {
  94                 return null;
  95         }
  96
  97 //      public void generateCode(
  98 //              BlockScope currentScope,
  99 //              CodeStream codeStream,
 100 //              boolean valueRequired) {
 101 //
 102 //              int pc = codeStream.position;
 103 //              ReferenceBinding allocatedType = binding.declaringClass;
 104 //
 105 //              codeStream.new_(allocatedType);
 106 //              if (valueRequired) {
 107 //                      codeStream.dup();
 108 //              }
 109 //              // better highlight for allocation: display the type individually
 110 //              codeStream.recordPositionsFrom(pc, type.sourceStart);
 111 //
 112 //              // handling innerclass instance allocation - enclosing instance arguments
 113 //              if (allocatedType.isNestedType()) {
 114 //                      codeStream.generateSyntheticEnclosingInstanceValues(
 115 //                              currentScope,
 116 //                              allocatedType,
 117 //                              enclosingInstance(),
 118 //                              this);
 119 //              }
 120 //              // generate the arguments for constructor
 121 //              if (arguments != null) {
 122 //                      for (int i = 0, count = arguments.length; i < count; i++) {
 123 //                              arguments[i].generateCode(currentScope, codeStream, true);
 124 //                      }
 125 //              }
 126 //              // handling innerclass instance allocation - outer local arguments
 127 //              if (allocatedType.isNestedType()) {
 128 //                      codeStream.generateSyntheticOuterArgumentValues(
 129 //                              currentScope,
 130 //                              allocatedType,
 131 //                              this);
 132 //              }
 133 //              // invoke constructor
 134 //              if (syntheticAccessor == null) {
 135 //                      codeStream.invokespecial(binding);
 136 //              } else {
 137 //                      // synthetic accessor got some extra arguments appended to its signature, which need values
 138 //                      for (int i = 0,
 139 //                              max = syntheticAccessor.parameters.length - binding.parameters.length;
 140 //                              i < max;
 141 //                              i++) {
 142 //                              codeStream.aconst_null();
 143 //                      }
 144 //                      codeStream.invokespecial(syntheticAccessor);
 145 //              }
 146 //              codeStream.recordPositionsFrom(pc, this.sourceStart);
 147 //      }
 148
 149         public boolean isSuperAccess() {
 150
 151                 return false;
 152         }
 153
 154         public boolean isTypeAccess() {
 155
 156                 return true;
 157         }
 158
 159         /* Inner emulation consists in either recording a dependency
 160          * link only, or performing one level of propagation.
 161          *
 162          * Dependency mechanism is used whenever dealing with source target
 163          * types, since by the time we reach them, we might not yet know their
 164          * exact need.
 165          */
 166         public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope) {
 167
 168                 ReferenceBinding allocatedType;
 169
 170                 // perform some emulation work in case there is some and we are inside a local type only
 171                 if ((allocatedType = binding.declaringClass).isNestedType()
 172                         && currentScope.enclosingSourceType().isLocalType()) {
 173
 174                         if (allocatedType.isLocalType()) {
 175                                 ((LocalTypeBinding) allocatedType).addInnerEmulationDependent(currentScope, false);
 176                                 // request cascade of accesses
 177                         } else {
 178                                 // locally propagate, since we already now the desired shape for sure
 179                                 currentScope.propagateInnerEmulation(allocatedType, false);
 180                                 // request cascade of accesses
 181                         }
 182                 }
 183         }
 184
 185         public void manageSyntheticAccessIfNecessary(BlockScope currentScope) {
 186
 187                 if (binding.isPrivate()
 188                         && (currentScope.enclosingSourceType() != binding.declaringClass)) {
 189
 190 //                      if (currentScope
 191 //                              .environment()
 192 //                              .options
 193 //                              .isPrivateConstructorAccessChangingVisibility) {
 194 //                              binding.tagForClearingPrivateModifier();
 195 //                              // constructor will not be dumped as private, no emulation required thus
 196 //                      } else {
 197                                 syntheticAccessor =
 198                                         ((SourceTypeBinding) binding.declaringClass).addSyntheticMethod(binding, isSuperAccess());
 199                                 currentScope.problemReporter().needToEmulateMethodAccess(binding, this);
 200 //                      }
 201                 }
 202         }
 203         public StringBuffer printExpression(int indent, StringBuffer output) {
 204
 205                 output.append("new "); //$NON-NLS-1$
 206                 type.printExpression(0, output);
 207                 output.append('(');
 208                 if (arguments != null) {
 209                         for (int i = 0; i < arguments.length; i++) {
 210                                 if (i > 0) output.append(", "); //$NON-NLS-1$
 211                                 arguments[i].printExpression(0, output);
 212                         }
 213                 }
 214                 return output.append(')');
 215         }
 216         public TypeBinding resolveType(BlockScope scope) {
 217
 218                 // Propagate the type checking to the arguments, and check if the constructor is defined.
 219                 constant = NotAConstant;
 220                 this.resolvedType = type.resolveType(scope);
 221                 // will check for null after args are resolved
 222
 223                 // buffering the arguments' types
 224                 TypeBinding[] argumentTypes = NoParameters;
 225                 if (arguments != null) {
 226                         boolean argHasError = false;
 227                         int length = arguments.length;
 228                         argumentTypes = new TypeBinding[length];
 229                         for (int i = 0; i < length; i++)
 230                                 if ((argumentTypes[i] = arguments[i].resolveType(scope)) == null)
 231                                         argHasError = true;
 232                         if (argHasError)
 233                                 return this.resolvedType;
 234                 }
 235                 if (this.resolvedType == null)
 236                         return null;
 237
 238                 if (!this.resolvedType.canBeInstantiated()) {
 239                         scope.problemReporter().cannotInstantiate(type, this.resolvedType);
 240                         return this.resolvedType;
 241                 }
 242                 ReferenceBinding allocatedType = (ReferenceBinding) this.resolvedType;
 243                 if (!(binding = scope.getConstructor(allocatedType, argumentTypes, this))
 244                         .isValidBinding()) {
 245                         if (binding.declaringClass == null)
 246                                 binding.declaringClass = allocatedType;
 247                         scope.problemReporter().invalidConstructor(this, binding);
 248                         return this.resolvedType;
 249                 }
 250                 if (isMethodUseDeprecated(binding, scope))
 251                         scope.problemReporter().deprecatedMethod(binding, this);
 252
 253                 if (arguments != null)
 254                         for (int i = 0; i < arguments.length; i++)
 255                                 arguments[i].implicitWidening(binding.parameters[i], argumentTypes[i]);
 256                 return allocatedType;
 257         }
 258
 259         public void setActualReceiverType(ReferenceBinding receiverType) {
 260                 // ignored
 261         }
 262
 263         public void setDepth(int i) {
 264                 // ignored
 265         }
 266
 267         public void setFieldIndex(int i) {
 268                 // ignored
 269         }
 270
 271         public String toStringExpression() {
 272
 273                 String s = "new " + type.toString(0); //$NON-NLS-1$
 274                 if (arguments == null)
 275                         s = s + "()"; //$NON-NLS-1$
 276                 else {
 277                         s = s + "("; //$NON-NLS-1$
 278                         for (int i = 0; i < arguments.length; i++) {
 279                                 s = s + arguments[i].toStringExpression();
 280                                 if (i == (arguments.length - 1))
 281                                         s = s + ")"; //$NON-NLS-1$
 282                                 else
 283                                         s = s + ", "; //$NON-NLS-1$
 284                         }
 285                 }
 286                 return s;
 287         }
 288
 289         public void traverse(ASTVisitor visitor, BlockScope scope) {
 290
 291                 if (visitor.visit(this, scope)) {
 292                         int argumentsLength;
 293                         type.traverse(visitor, scope);
 294                         if (arguments != null) {
 295                                 argumentsLength = arguments.length;
 296                                 for (int i = 0; i < argumentsLength; i++)
 297                                         arguments[i].traverse(visitor, scope);
 298                         }
 299                 }
 300                 visitor.endVisit(this, scope);
 301         }
 302 }