repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/Argument.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 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 org.eclipse.jdt.internal.compiler.ast;
  12
  13 import org.eclipse.jdt.core.compiler.CharOperation;
  14 import org.eclipse.jdt.internal.compiler.ASTVisitor;
  15 import org.eclipse.jdt.internal.compiler.lookup.*;
  16
  17 public class Argument extends LocalDeclaration {
  18
  19         // prefix for setter method (to recognize special hiding argument)
  20         private final static char[] SET = "set".toCharArray(); //$NON-NLS-1$
  21
  22         public Argument(char[] name, long posNom, TypeReference tr, int modifiers) {
  23
  24                 super(name, (int) (posNom >>> 32), (int) posNom);
  25                 this.declarationSourceEnd = (int) posNom;
  26                 this.modifiers = modifiers;
  27                 type = tr;
  28                 this.bits |= IsLocalDeclarationReachableMASK;
  29         }
  30
  31         public void bind(MethodScope scope, TypeBinding typeBinding, boolean used) {
  32
  33                 if (this.type != null)
  34                         this.type.resolvedType = typeBinding;
  35                 // record the resolved type into the type reference
  36                 int modifierFlag = this.modifiers;
  37
  38                 Binding existingVariable = scope.getBinding(name, BindingIds.VARIABLE, this, false /*do not resolve hidden field*/);
  39                 if (existingVariable != null && existingVariable.isValidBinding()){
  40                         if (existingVariable instanceof LocalVariableBinding && this.hiddenVariableDepth == 0) {
  41                                 scope.problemReporter().redefineArgument(this);
  42                                 return;
  43                         }
  44                         boolean isSpecialArgument = false;
  45                         if (existingVariable instanceof FieldBinding) {
  46                                 if (scope.isInsideConstructor()) {
  47                                         isSpecialArgument = true; // constructor argument
  48                                 } else {
  49                                         AbstractMethodDeclaration methodDecl = scope.referenceMethod();
  50                                         if (methodDecl != null && CharOperation.prefixEquals(SET, methodDecl.selector)) {
  51                                                 isSpecialArgument = true; // setter argument
  52                                         }
  53                                 }
  54                         }
  55                         scope.problemReporter().localVariableHiding(this, existingVariable, isSpecialArgument);
  56                 }
  57
  58                 scope.addLocalVariable(
  59                         this.binding =
  60                                 new LocalVariableBinding(this, typeBinding, modifierFlag, true));
  61                 //true stand for argument instead of just local
  62                 if (typeBinding != null && isTypeUseDeprecated(typeBinding, scope))
  63                         scope.problemReporter().deprecatedType(typeBinding, this.type);
  64                 this.binding.declaration = this;
  65                 this.binding.useFlag = used ? LocalVariableBinding.USED : LocalVariableBinding.UNUSED;
  66         }
  67
  68         public StringBuffer print(int indent, StringBuffer output) {
  69
  70                 printIndent(indent, output);
  71                 printModifiers(this.modifiers, output);
  72                 if (type == null) {
  73                         output.append("<no type> "); //$NON-NLS-1$
  74                 } else {
  75                         type.print(0, output).append(' ');
  76                 }
  77                 return output.append(this.name);
  78         }
  79
  80         public StringBuffer printStatement(int indent, StringBuffer output) {
  81
  82                 return print(indent, output).append(';');
  83         }
  84
  85         public TypeBinding resolveForCatch(BlockScope scope) {
  86
  87                 // resolution on an argument of a catch clause
  88                 // provide the scope with a side effect : insertion of a LOCAL
  89                 // that represents the argument. The type must be from JavaThrowable
  90
  91                 TypeBinding tb = type.resolveTypeExpecting(scope, scope.getJavaLangThrowable());
  92                 if (tb == null)
  93                         return null;
  94
  95                 Binding existingVariable = scope.getBinding(name, BindingIds.VARIABLE, this, false /*do not resolve hidden field*/);
  96                 if (existingVariable != null && existingVariable.isValidBinding()){
  97                         if (existingVariable instanceof LocalVariableBinding && this.hiddenVariableDepth == 0) {
  98                                 scope.problemReporter().redefineArgument(this);
  99                                 return null;
 100                         }
 101                         scope.problemReporter().localVariableHiding(this, existingVariable, false);
 102                 }
 103
 104                 binding = new LocalVariableBinding(this, tb, modifiers, false); // argument decl, but local var  (where isArgument = false)
 105                 scope.addLocalVariable(binding);
 106                 binding.constant = NotAConstant;
 107                 return tb;
 108         }
 109
 110         public void traverse(ASTVisitor visitor, BlockScope scope) {
 111
 112                 if (visitor.visit(this, scope)) {
 113                         if (type != null)
 114                                 type.traverse(visitor, scope);
 115                         if (initialization != null)
 116                                 initialization.traverse(visitor, scope);
 117                 }
 118                 visitor.endVisit(this, scope);
 119         }
 120 }