InlineAccessFieldBinding.java

/* *******************************************************************
 * 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.lookup;

import org.aspectj.ajdt.internal.compiler.ast.AspectDeclaration;
import org.aspectj.org.eclipse.jdt.internal.compiler.impl.Constant;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.FieldBinding;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.InvocationSite;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.Scope;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.SyntheticMethodBinding;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
import org.aspectj.weaver.AjcMemberMaker;
import org.aspectj.weaver.ResolvedMember;


/**
 * Used for field references within the body of an around advice
 * to force the use of public access methods.  This makes it possible
 * for around advice to be inlined into any shadow to which it applies.
 * 
 * ??? this is very similar to PrivilegedFieldBinding and is somewhat related
 *     to InterTypeFieldBinding.  Maybe they have a common supertype?
 * 
 * @author Jim Hugunin
 */
00037 public class InlineAccessFieldBinding extends FieldBinding {
      public SimpleSyntheticAccessMethodBinding reader;
      public SimpleSyntheticAccessMethodBinding writer;
      
      
      public FieldBinding baseField;
      
      public InlineAccessFieldBinding(AspectDeclaration inAspect, FieldBinding baseField, ResolvedMember resolvedField) {
            super(baseField, baseField.declaringClass);

            this.reader = new SimpleSyntheticAccessMethodBinding(
                  inAspect.factory.makeMethodBinding(
                        AjcMemberMaker.inlineAccessMethodForFieldGet(
                              inAspect.typeX, resolvedField
                  )));
            this.writer = new SimpleSyntheticAccessMethodBinding(inAspect.factory.makeMethodBinding(
                        AjcMemberMaker.inlineAccessMethodForFieldSet(
                              inAspect.typeX, resolvedField
                  )));
                  
            this.constant = Constant.NotAConstant;
            this.baseField = baseField;
      }


      public boolean canBeSeenBy(TypeBinding receiverType, InvocationSite invocationSite, Scope scope) {
            return true;
      }

      public SyntheticMethodBinding getAccessMethod(boolean isReadAccess) {
            if (isReadAccess) return reader;
            else return writer;
      }
      
      public boolean alwaysNeedsAccessMethod(boolean isReadAccess) { return true; }

      public FieldBinding getFieldBindingForLookup() { return baseField; }


      public String toString() { return "InlineAccess(" + baseField + ")"; }
}