    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 */
    017package org.apache.bcel.generic;
    018
    019import java.io.DataOutputStream;
    020import java.io.IOException;
    021
    022import org.apache.bcel.util.ByteSequence;
    023
    024/**
    025 * GOTO_W - Branch always (to relative offset, not absolute address)
    026 */
    027public class GOTO_W extends GotoInstruction {
    028
    029    /**
    030     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
    031     */
    032    GOTO_W() {
    033    }
    034
    035    public GOTO_W(final InstructionHandle target) {
    036        super(org.apache.bcel.Const.GOTO_W, target);
    037        super.setLength(5);
    038    }
    039
    040    /**
    041     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
    042     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
    043     *
    044     * @param v Visitor object
    045     */
    046    @Override
    047    public void accept(final Visitor v) {
    048        v.visitUnconditionalBranch(this);
    049        v.visitBranchInstruction(this);
    050        v.visitGotoInstruction(this);
    051        v.visitGOTO_W(this);
    052    }
    053
    054    /**
    055     * Dump instruction as byte code to stream out.
    056     *
    057     * @param out Output stream
    058     */
    059    @Override
    060    public void dump(final DataOutputStream out) throws IOException {
    061        super.setIndex(getTargetOffset());
    062        out.writeByte(super.getOpcode());
    063        out.writeInt(super.getIndex());
    064    }
    065
    066    /**
    067     * Read needed data (e.g. index) from file.
    068     */
    069    @Override
    070    protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
    071        super.setIndex(bytes.readInt());
    072        super.setLength(5);
    073    }
    074}