    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 * @version $Id$
    029 */
    030public class JSR_W extends JsrInstruction {
    031
    032    /**
    033     * Empty constructor needed for Instruction.readInstruction.
    034     * Not to be used otherwise.
    035     */
    036    JSR_W() {
    037    }
    038
    039
    040    public JSR_W(final InstructionHandle target) {
    041        super(org.apache.bcel.Const.JSR_W, target);
    042        super.setLength(5);
    043    }
    044
    045
    046    /**
    047     * Dump instruction as byte code to stream out.
    048     * @param out Output stream
    049     */
    050    @Override
    051    public void dump( final DataOutputStream out ) throws IOException {
    052        super.setIndex(getTargetOffset());
    053        out.writeByte(super.getOpcode());
    054        out.writeInt(super.getIndex());
    055    }
    056
    057
    058    /**
    059     * Read needed data (e.g. index) from file.
    060     */
    061    @Override
    062    protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {
    063        super.setIndex(bytes.readInt());
    064        super.setLength(5);
    065    }
    066
    067
    068    /**
    069     * Call corresponding visitor method(s). The order is:
    070     * Call visitor methods of implemented interfaces first, then
    071     * call methods according to the class hierarchy in descending order,
    072     * i.e., the most specific visitXXX() call comes last.
    073     *
    074     * @param v Visitor object
    075     */
    076    @Override
    077    public void accept( final Visitor v ) {
    078        v.visitStackProducer(this);
    079        v.visitBranchInstruction(this);
    080        v.visitJsrInstruction(this);
    081        v.visitJSR_W(this);
    082    }
    083}