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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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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 v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * 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.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 BcelFieldRef extends BcelVar {

	private String className, fieldName;

	public BcelFieldRef(ResolvedType type, String className, String fieldName) {
		super(type, 0);
		this.className = className;
		this.fieldName = fieldName;
	}

	public String toString() {
		return "BcelFieldRef(" + getType() + " " + className + "." + fieldName + ")";
	}

	// public int getSlot() { return slot; }

	public Instruction createLoad(InstructionFactory fact) {
		return fact.createFieldAccess(className, fieldName, BcelWorld.makeBcelType(getType()), Constants.GETSTATIC);
	}

	public Instruction createStore(InstructionFactory fact) {
		return fact.createFieldAccess(className, fieldName, BcelWorld.makeBcelType(getType()), Constants.PUTSTATIC);
	}

	public InstructionList createCopyFrom(InstructionFactory fact, int oldSlot) {
		throw new RuntimeException("unimplemented");
	}

	// 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(fact.createArrayLoad(BcelWorld.makeBcelType(convertFromType)));
	// Utility.appendConversion(il, fact, convertFromType, convertTo);
	// }
	//
	// void appendConvertableArrayStore(
	// InstructionList il,
	// InstructionFactory fact,
	// int index,
	// BcelFieldRef 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(fact.createArrayStore(BcelWorld.makeBcelType(convertToType)));
	// }
	//
	// InstructionList createConvertableArrayStore(
	// InstructionFactory fact,
	// int index,
	// BcelFieldRef 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;
	// }
}