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Java > Open Source Codes > com > vladium > jcd > cls > constant > CONSTANT_Class_info


1 /* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
2  *
3  * This program and the accompanying materials are made available under
4  * the terms of the Common Public License v1.0 which accompanies this distribution,
5  * and is available at http://www.eclipse.org/legal/cpl-v10.html
6  *
7  * $Id: CONSTANT_Class_info.java,v 1.1.1.1 2004/05/09 16:57:48 vlad_r Exp $
8  */
9 package com.vladium.jcd.cls.constant;
10
11 import java.io.IOException JavaDoc;
12
13 import com.vladium.jcd.cls.ClassDef;
14 import com.vladium.jcd.lib.UDataInputStream;
15 import com.vladium.jcd.lib.UDataOutputStream;
16
17 // ----------------------------------------------------------------------------
18 /**
19  * The CONSTANT_Class_info structure is used to represent a class or an interface.<P>
20  *
21  * The value of the name_index item must be a valid index into the constant pool
22  * table. The constant pool entry at that index must be a {@link CONSTANT_Utf8_info}
23  * structure representing a valid fully qualified Java class name that has been
24  * converted to the class file's internal form.
25  *
26  * @author (C) 2001, Vlad Roubtsov
27  */
28 public
29 final class CONSTANT_Class_info extends CONSTANT_info
30 {
31     // public: ................................................................
32
33     public static final byte TAG = 7;
34     
35     public int m_name_index;
36     
37     
38     public CONSTANT_Class_info (final int name_index)
39     {
40         m_name_index = name_index;
41     }
42
43     
44     public final byte tag ()
45     {
46         return TAG;
47     }
48     
49     /**
50      * Returns the JVM class name within the constant pool context of 'cls'
51      * class definition.
52      *
53      * @param cls class that contains this constant
54      * @return class name [in JVM format]
55      */
56     public String JavaDoc getName (final ClassDef cls)
57     {
58         return ((CONSTANT_Utf8_info) cls.getConstants ().get (m_name_index)).m_value;
59     }
60     
61     // Visitor:
62
63     public Object JavaDoc accept (final ICONSTANTVisitor visitor, final Object JavaDoc ctx)
64     {
65         return visitor.visit (this, ctx);
66     }
67
68     
69     public String JavaDoc toString ()
70     {
71         return "CONSTANT_Class: [name_index = " + m_name_index + ']';
72     }
73     
74     // Cloneable: inherited clone() is Ok
75
76     // IClassFormatOutput:
77
78     public void writeInClassFormat (final UDataOutputStream out) throws IOException JavaDoc
79     {
80         super.writeInClassFormat (out);
81         
82         out.writeU2 (m_name_index);
83     }
84     
85     // protected: .............................................................
86
87     
88     protected CONSTANT_Class_info (final UDataInputStream bytes) throws IOException JavaDoc
89     {
90         m_name_index = bytes.readU2 ();
91     }
92     
93     // package: ...............................................................
94
95     // private: ...............................................................
96
97 } // end of class
98 // ----------------------------------------------------------------------------
99
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