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}