    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 * JSR_W - Jump to subroutine
    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, that is, 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     * Dumps 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     * Reads needed data (for example 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}