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}