Package org.aspectj.ajdt.internal.compiler.ast

Source Code of org.aspectj.ajdt.internal.compiler.ast.InterSuperFixerVisitor

/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/epl-v10.html
* Contributors:
*     PARC     initial implementation
* ******************************************************************/


package org.aspectj.ajdt.internal.compiler.ast;

import org.aspectj.ajdt.internal.compiler.lookup.EclipseFactory;
import org.aspectj.ajdt.internal.compiler.lookup.EclipseSourceLocation;
import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.ISourceLocation;
import org.aspectj.org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.Expression;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.MessageSend;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.SuperReference;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.Scope;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.TypeBinding;

/**
* Walks the body of inter-type declarations and replaces SuperReference with InterSuperReference
*
* @author Jim Hugunin
*/

public class InterSuperFixerVisitor extends ASTVisitor {
  InterTypeDeclaration dec;
  ReferenceBinding onType;
  TypeBinding superType;
  private int depthCounter = 0; // Keeps track of whether we are inside any nested local type declarations

  EclipseFactory world;
  public InterSuperFixerVisitor(InterTypeDeclaration dec, EclipseFactory world, Scope scope) {
    this.dec = dec;
    this.onType = dec.onTypeBinding;
    this.world = world;
    // AMC with the java 5 compiler the superclass() of an interface is object,
    // not a parent interface (if one exists)
    if (onType.isInterface() && onType.superInterfaces().length == 1) {
      superType=onType.superInterfaces()[0];
    } else if (onType.superclass() != null) {
      superType = onType.superclass();
    } else if (onType.superInterfaces() == null || onType.superInterfaces().length == 0) {
      superType = scope.getJavaLangObject();
    } else if (onType.superInterfaces().length == 1) {
      superType = onType.superInterfaces()[0];
    } else {
      superType = null;
    }
  }

  public void endVisit(FieldReference ref, BlockScope scope) {
    ref.receiver = fixReceiver(ref.receiver, scope);
  }
  public void endVisit(MessageSend send, BlockScope scope) {
    send.receiver = fixReceiver(send.receiver, scope);
  }
 
 
  public boolean visit(TypeDeclaration localTypeDeclaration, BlockScope scope) {
    depthCounter++;
    return super.visit(localTypeDeclaration, scope);
  }

  public void endVisit(TypeDeclaration localTypeDeclaration,BlockScope scope) {
    depthCounter--;
 

  private Expression fixReceiver(Expression expression, BlockScope scope) {
    if (depthCounter!=0) return expression; // Don't mess with super calls down in nested local type declarations (pr90143)
    if (expression instanceof SuperReference) {
      SuperReference superRef = (SuperReference) expression;
      if (superType == null) {
        ISourceLocation location =
          new EclipseSourceLocation(scope.problemReporter().referenceContext.compilationResult(),
                    expression.sourceStart, expression.sourceEnd);
       
        world.showMessage(IMessage.ERROR, "multiple supertypes for this interface", location, null);
        dec.ignoreFurtherInvestigation = true;
      }
      //FIXME ??? note error
      expression = new InterSuperReference(superRef, superType)
    }
    return expression;
  }
 


}
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