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/* *******************************************************************
* 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.weaver.bcel;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.generic.Instruction;
import org.aspectj.apache.bcel.generic.InstructionFactory;
import org.aspectj.apache.bcel.generic.InstructionList;
import org.aspectj.apache.bcel.generic.Type;
import org.aspectj.weaver.Member;
import org.aspectj.weaver.NameMangler;
import org.aspectj.weaver.ResolvedType;
/**
* XXX Erik and I need to discuss this hierarchy. Having FieldRef extend Var is convenient, but hopefully there's a better design.
*
* This is always a static reference.
*/
public class BcelCflowAccessVar extends BcelVar {
private Member stackField;
private int index;
/**
* @param type The type to convert to from Object
* @param stackField the member containing the CFLOW_STACK_TYPE
* @param index yeah yeah
*/
public BcelCflowAccessVar(ResolvedType type, Member stackField, int index) {
super(type, 0);
this.stackField = stackField;
this.index = index;
}
public String toString() {
return "BcelCflowAccessVar(" + getType() + " " + stackField + "." + index + ")";
}
public Instruction createLoad(InstructionFactory fact) {
throw new RuntimeException("unimplemented");
}
public Instruction createStore(InstructionFactory fact) {
throw new RuntimeException("unimplemented");
}
public InstructionList createCopyFrom(InstructionFactory fact, int oldSlot) {
throw new RuntimeException("unimplemented");
}
public void appendLoad(InstructionList il, InstructionFactory fact) {
il.append(createLoadInstructions(getType(), fact));
}
public InstructionList createLoadInstructions(ResolvedType toType, InstructionFactory fact) {
InstructionList il = new InstructionList();
il.append(Utility.createGet(fact, stackField));
il.append(Utility.createConstant(fact, index));
il.append(fact.createInvoke(NameMangler.CFLOW_STACK_TYPE, "get", Type.OBJECT, new Type[] { Type.INT },
Constants.INVOKEVIRTUAL));
il.append(Utility.createConversion(fact, Type.OBJECT, BcelWorld.makeBcelType(toType)));
return il;
}
public void appendLoadAndConvert(InstructionList il, InstructionFactory fact, ResolvedType toType) {
il.append(createLoadInstructions(toType, fact));
}
public void insertLoad(InstructionList il, InstructionFactory fact) {
il.insert(createLoadInstructions(getType(), fact));
}
}