169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/* 269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Javassist, a Java-bytecode translator toolkit. 369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved. 469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * The contents of this file are subject to the Mozilla Public License Version 669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1.1 (the "License"); you may not use this file except in compliance with 769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the License. Alternatively, the contents of this file may be used under 869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the terms of the GNU Lesser General Public License Version 2.1 or later. 969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Software distributed under the License is distributed on an "AS IS" basis, 1169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 1269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * for the specific language governing rights and limitations under the 1369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * License. 1469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 1569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpackage javassist.convert; 1769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.CannotCompileException; 1969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.CtClass; 2069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.BadBytecode; 2169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.CodeAttribute; 2269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.CodeIterator; 2369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.ConstPool; 2469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.MethodInfo; 2569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.bytecode.Opcode; 2669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 2769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/** 2869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Transformer and its subclasses are used for executing 2969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * code transformation specified by CodeConverter. 3069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 3169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * @see javassist.CodeConverter 3269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 3369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpublic abstract class Transformer implements Opcode { 3469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal private Transformer next; 3569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 3669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public Transformer(Transformer t) { 3769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal next = t; 3869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 3969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public Transformer getNext() { return next; } 4169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void initialize(ConstPool cp, CodeAttribute attr) {} 4369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void initialize(ConstPool cp, CtClass clazz, MethodInfo minfo) throws CannotCompileException { 4569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal initialize(cp, minfo.getCodeAttribute()); 4669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 4769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void clean() {} 4969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public abstract int transform(CtClass clazz, int pos, CodeIterator it, 5169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal ConstPool cp) throws CannotCompileException, BadBytecode; 5269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public int extraLocals() { return 0; } 5469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public int extraStack() { return 0; } 5669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal} 57