1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 package com.sun.org.apache.bcel.internal.generic;
   6 
   7 /* ====================================================================
   8  * The Apache Software License, Version 1.1
   9  *
  10  * Copyright (c) 2001 The Apache Software Foundation.  All rights
  11  * reserved.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  *
  20  * 2. Redistributions in binary form must reproduce the above copyright
  21  *    notice, this list of conditions and the following disclaimer in
  22  *    the documentation and/or other materials provided with the
  23  *    distribution.
  24  *
  25  * 3. The end-user documentation included with the redistribution,
  26  *    if any, must include the following acknowledgment:
  27  *       "This product includes software developed by the
  28  *        Apache Software Foundation (http://www.apache.org/)."
  29  *    Alternately, this acknowledgment may appear in the software itself,
  30  *    if and wherever such third-party acknowledgments normally appear.
  31  *
  32  * 4. The names "Apache" and "Apache Software Foundation" and
  33  *    "Apache BCEL" must not be used to endorse or promote products
  34  *    derived from this software without prior written permission. For
  35  *    written permission, please contact apache@apache.org.
  36  *
  37  * 5. Products derived from this software may not be called "Apache",
  38  *    "Apache BCEL", nor may "Apache" appear in their name, without
  39  *    prior written permission of the Apache Software Foundation.
  40  *
  41  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  42  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  43  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  44  * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  45  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  47  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  48  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  49  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  50  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  51  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  * ====================================================================
  54  *
  55  * This software consists of voluntary contributions made by many
  56  * individuals on behalf of the Apache Software Foundation.  For more
  57  * information on the Apache Software Foundation, please see
  58  * <http://www.apache.org/>.
  59  */
  60 import java.io.*;
  61 import com.sun.org.apache.bcel.internal.util.ByteSequence;
  62 
  63 /**
  64  * JSR_W - Jump to subroutine
  65  *
  66  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  67  */
  68 public class JSR_W extends JsrInstruction {
  69   /**
  70    * Empty constructor needed for the Class.newInstance() statement in
  71    * Instruction.readInstruction(). Not to be used otherwise.
  72    */
  73   JSR_W() {}
  74 
  75   public JSR_W(InstructionHandle target) {
  76     super(com.sun.org.apache.bcel.internal.Constants.JSR_W, target);
  77     length = 5;
  78   }
  79 
  80   /**
  81    * Dump instruction as byte code to stream out.
  82    * @param out Output stream
  83    */
  84   public void dump(DataOutputStream out) throws IOException {
  85     index = getTargetOffset();
  86     out.writeByte(opcode);
  87     out.writeInt(index);
  88   }
  89 
  90   /**
  91    * Read needed data (e.g. index) from file.
  92    */
  93   protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException
  94   {
  95     index = bytes.readInt();
  96     length = 5;
  97   }
  98 
  99   /**
 100    * Call corresponding visitor method(s). The order is:
 101    * Call visitor methods of implemented interfaces first, then
 102    * call methods according to the class hierarchy in descending order,
 103    * i.e., the most specific visitXXX() call comes last.
 104    *
 105    * @param v Visitor object
 106    */
 107   public void accept(Visitor v) {
 108     v.visitStackProducer(this);
 109     v.visitBranchInstruction(this);
 110     v.visitJsrInstruction(this);
 111     v.visitJSR_W(this);
 112   }
 113 }