    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}