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 * JSR_W - Jump to subroutine
027 *
028 */
029public class JSR_W extends JsrInstruction {
030
031    /**
032     * Empty constructor needed for Instruction.readInstruction.
033     * Not to be used otherwise.
034     */
035    JSR_W() {
036    }
037
038
039    public JSR_W(final InstructionHandle target) {
040        super(org.apache.bcel.Const.JSR_W, target);
041        super.setLength(5);
042    }
043
044
045    /**
046     * Dump instruction as byte code to stream out.
047     * @param out Output stream
048     */
049    @Override
050    public void dump( final DataOutputStream out ) throws IOException {
051        super.setIndex(getTargetOffset());
052        out.writeByte(super.getOpcode());
053        out.writeInt(super.getIndex());
054    }
055
056
057    /**
058     * Read needed data (e.g. index) from file.
059     */
060    @Override
061    protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {
062        super.setIndex(bytes.readInt());
063        super.setLength(5);
064    }
065
066
067    /**
068     * Call corresponding visitor method(s). The order is:
069     * Call visitor methods of implemented interfaces first, then
070     * call methods according to the class hierarchy in descending order,
071     * i.e., the most specific visitXXX() call comes last.
072     *
073     * @param v Visitor object
074     */
075    @Override
076    public void accept( final Visitor v ) {
077        v.visitStackProducer(this);
078        v.visitBranchInstruction(this);
079        v.visitJsrInstruction(this);
080        v.visitJSR_W(this);
081    }
082}