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