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}