001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.generic; 019 020import java.io.DataOutputStream; 021import java.io.IOException; 022 023import org.apache.bcel.util.ByteSequence; 024 025/** 026 * GOTO_W - Branch always (to relative offset, not absolute address) 027 * 028 * @version $Id: GOTO_W.java 1812166 2017-10-13 23:48:11Z ggregory $ 029 */ 030public class GOTO_W extends GotoInstruction { 031 032 /** 033 * Empty constructor needed for Instruction.readInstruction. 034 * Not to be used otherwise. 035 */ 036 GOTO_W() { 037 } 038 039 040 public GOTO_W(final InstructionHandle target) { 041 super(org.apache.bcel.Const.GOTO_W, target); 042 super.setLength(5); 043 } 044 045 046 /** 047 * Dump instruction as byte code to stream out. 048 * @param out Output stream 049 */ 050 @Override 051 public void dump( final DataOutputStream out ) throws IOException { 052 super.setIndex(getTargetOffset()); 053 out.writeByte(super.getOpcode()); 054 out.writeInt(super.getIndex()); 055 } 056 057 058 /** 059 * Read needed data (e.g. index) from file. 060 */ 061 @Override 062 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 063 super.setIndex(bytes.readInt()); 064 super.setLength(5); 065 } 066 067 068 /** 069 * Call corresponding visitor method(s). The order is: 070 * Call visitor methods of implemented interfaces first, then 071 * call methods according to the class hierarchy in descending order, 072 * i.e., the most specific visitXXX() call comes last. 073 * 074 * @param v Visitor object 075 */ 076 @Override 077 public void accept( final Visitor v ) { 078 v.visitUnconditionalBranch(this); 079 v.visitBranchInstruction(this); 080 v.visitGotoInstruction(this); 081 v.visitGOTO_W(this); 082 } 083}