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