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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.generic.Instruction;
- import org.aspectj.apache.bcel.generic.InstructionFactory;
- import org.aspectj.apache.bcel.generic.InstructionList;
- import org.aspectj.weaver.ResolvedType;
- import org.aspectj.weaver.ast.Var;
-
- public class BcelVar extends Var {
-
- private int positionInAroundState = -1;
-
- private int slot;
-
- public BcelVar(ResolvedType type, int slot) {
- super(type);
- this.slot = slot;
- }
-
- public String toString() {
- return "BcelVar(" + getType() + " " + slot + ((positionInAroundState != -1) ? (" " + positionInAroundState) : "") +
-
- ")";
- }
-
- public int getSlot() {
- return slot;
- }
-
- // fact is used in the subtypes
- public Instruction createLoad(InstructionFactory fact) {
- return InstructionFactory.createLoad(BcelWorld.makeBcelType(getType()), slot);
- }
-
- public Instruction createStore(InstructionFactory fact) {
- return InstructionFactory.createStore(BcelWorld.makeBcelType(getType()), slot);
- }
-
- public void appendStore(InstructionList il, InstructionFactory fact) {
- il.append(createStore(fact));
- }
-
- public void appendLoad(InstructionList il, InstructionFactory fact) {
- il.append(createLoad(fact));
- }
-
- public void appendLoadAndConvert(InstructionList il, InstructionFactory fact, ResolvedType toType) {
- il.append(createLoad(fact));
- Utility.appendConversion(il, fact, getType(), toType);
- }
-
- public void insertLoad(InstructionList il, InstructionFactory fact) {
- il.insert(createLoad(fact));
- }
-
- public InstructionList createCopyFrom(InstructionFactory fact, int oldSlot) {
- InstructionList il = new InstructionList();
- il.append(InstructionFactory.createLoad(BcelWorld.makeBcelType(getType()), oldSlot));
- il.append(createStore(fact));
- return il;
- }
-
- // this is an array var
- void appendConvertableArrayLoad(InstructionList il, InstructionFactory fact, int index, ResolvedType convertTo) {
- ResolvedType convertFromType = getType().getResolvedComponentType();
- appendLoad(il, fact);
- il.append(Utility.createConstant(fact, index));
- il.append(InstructionFactory.createArrayLoad(BcelWorld.makeBcelType(convertFromType)));
- Utility.appendConversion(il, fact, convertFromType, convertTo);
- }
-
- void appendConvertableArrayStore(InstructionList il, InstructionFactory fact, int index, BcelVar storee) {
- ResolvedType convertToType = getType().getResolvedComponentType();
- appendLoad(il, fact);
- il.append(Utility.createConstant(fact, index));
- storee.appendLoad(il, fact);
- Utility.appendConversion(il, fact, storee.getType(), convertToType);
- il.append(InstructionFactory.createArrayStore(BcelWorld.makeBcelType(convertToType)));
- }
-
- InstructionList createConvertableArrayStore(InstructionFactory fact, int index, BcelVar storee) {
- InstructionList il = new InstructionList();
- appendConvertableArrayStore(il, fact, index, storee);
- return il;
- }
-
- InstructionList createConvertableArrayLoad(InstructionFactory fact, int index, ResolvedType convertTo) {
- InstructionList il = new InstructionList();
- appendConvertableArrayLoad(il, fact, index, convertTo);
- return il;
- }
-
- public int getPositionInAroundState() {
- return positionInAroundState;
- }
-
- public void setPositionInAroundState(int positionInAroundState) {
- this.positionInAroundState = positionInAroundState;
- }
-
- // random useful fields
-
- public static final BcelVar[] NONE = new BcelVar[] {};
-
- }
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