1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements.  See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License.  You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  */
18 package org.apache.bcel.generic;
19 
20 import java.io.DataOutputStream;
21 import java.io.IOException;
22 
23 import org.apache.bcel.util.ByteSequence;
24 
25 /**
26  * GOTO_W - Branch always (to relative offset, not absolute address)
27  *
28  * @version $Id$
29  */
30 public class GOTO_W extends GotoInstruction {
31 
32     /**
33      * Empty constructor needed for Instruction.readInstruction.
34      * Not to be used otherwise.
35      */
GOTO_W()36     GOTO_W() {
37     }
38 
39 
GOTO_W(final InstructionHandle target)40     public GOTO_W(final InstructionHandle target) {
41         super(org.apache.bcel.Const.GOTO_W, target);
42         super.setLength(5);
43     }
44 
45 
46     /**
47      * Dump instruction as byte code to stream out.
48      * @param out Output stream
49      */
50     @Override
dump( final DataOutputStream out )51     public void dump( final DataOutputStream out ) throws IOException {
52         super.setIndex(getTargetOffset());
53         out.writeByte(super.getOpcode());
54         out.writeInt(super.getIndex());
55     }
56 
57 
58     /**
59      * Read needed data (e.g. index) from file.
60      */
61     @Override
initFromFile( final ByteSequence bytes, final boolean wide )62     protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {
63         super.setIndex(bytes.readInt());
64         super.setLength(5);
65     }
66 
67 
68     /**
69      * Call corresponding visitor method(s). The order is:
70      * Call visitor methods of implemented interfaces first, then
71      * call methods according to the class hierarchy in descending order,
72      * i.e., the most specific visitXXX() call comes last.
73      *
74      * @param v Visitor object
75      */
76     @Override
accept( final Visitor v )77     public void accept( final Visitor v ) {
78         v.visitUnconditionalBranch(this);
79         v.visitBranchInstruction(this);
80         v.visitGotoInstruction(this);
81         v.visitGOTO_W(this);
82     }
83 }
84