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Java > Open Source Codes > com > sun > org > apache > bcel > internal > generic > GOTO_W


1 package com.sun.org.apache.bcel.internal.generic;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache BCEL" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache BCEL", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56 import java.io.*;
57 import com.sun.org.apache.bcel.internal.util.ByteSequence;
58
59 /**
60  * GOTO_W - Branch always (to relative offset, not absolute address)
61  *
62  * @version $Id: GOTO_W.java,v 1.1.1.1 2001/10/29 20:00:13 jvanzyl Exp $
63  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
64  */
65 public class GOTO_W extends GotoInstruction {
66   /**
67    * Empty constructor needed for the Class.newInstance() statement in
68    * Instruction.readInstruction(). Not to be used otherwise.
69    */
70   GOTO_W() {}
71
72   public GOTO_W(InstructionHandle target) {
73     super(com.sun.org.apache.bcel.internal.Constants.GOTO_W, target);
74     length = 5;
75   }
76
77   /**
78    * Dump instruction as byte code to stream out.
79    * @param out Output stream
80    */
81   public void dump(DataOutputStream out) throws IOException {
82     index = getTargetOffset();
83     out.writeByte(opcode);
84     out.writeInt(index);
85   }
86
87   /**
88    * Read needed data (e.g. index) from file.
89    */
90   protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException
91   {
92     index = bytes.readInt();
93     length = 5;
94   }
95
96   /**
97    * Call corresponding visitor method(s). The order is:
98    * Call visitor methods of implemented interfaces first, then
99    * call methods according to the class hierarchy in descending order,
100    * i.e., the most specific visitXXX() call comes last.
101    *
102    * @param v Visitor object
103    */
104   public void accept(Visitor v) {
105     v.visitUnconditionalBranch(this);
106     v.visitBranchInstruction(this);
107     v.visitGotoInstruction(this);
108     v.visitGOTO_W(this);
109   }
110 }
111
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