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_NameAndType_info.java,v 1.1.1.1 2004/05/09 16:57:49 vlad_r Exp $
8 */
9package com.vladium.jcd.cls.constant;
10
11import java.io.IOException;
12
13import com.vladium.jcd.cls.ClassDef;
14import com.vladium.jcd.lib.UDataInputStream;
15import com.vladium.jcd.lib.UDataOutputStream;
16
17// ----------------------------------------------------------------------------
18/**
19 * The CONSTANT_NameAndType_info structure is used to represent a field or method,
20 * without indicating which class or interface type it belongs to.<P>
21 *
22 * The value of the name_index item must be a valid index into the constant pool
23 * table. The constant pool entry at that index must be a {@link CONSTANT_Utf8_info}
24 * structure representing a valid Java field name or method name stored as a simple
25 * (not fully qualified) name, that is, as a Java identifier.<P>
26 *
27 * The value of the descriptor_index item must be a valid index into the constant
28 * pool table. The constant pool entry at that index must be a {@link CONSTANT_Utf8_info}
29 * structure representing a valid Java field descriptor or method descriptor.
30 *
31 * @author (C) 2001, Vlad Roubtsov
32 */
33public
34final class CONSTANT_NameAndType_info extends CONSTANT_info
35{
36    // public: ................................................................
37
38    public static final byte TAG = 12;
39
40
41    public int m_name_index;
42    public int m_descriptor_index;
43
44
45    public CONSTANT_NameAndType_info (final int name_index, final int descriptor_index)
46    {
47        m_name_index = name_index;
48        m_descriptor_index = descriptor_index;
49    }
50
51    public final byte tag ()
52    {
53        return TAG;
54    }
55
56    public String getName (final ClassDef cls)
57    {
58        return ((CONSTANT_Utf8_info) cls.getConstants ().get (m_name_index)).m_value;
59    }
60
61    public String getDescriptor (final ClassDef cls)
62    {
63        return ((CONSTANT_Utf8_info) cls.getConstants ().get (m_descriptor_index)).m_value;
64    }
65
66    // Visitor:
67
68    public Object accept (final ICONSTANTVisitor visitor, final Object ctx)
69    {
70        return visitor.visit (this, ctx);
71    }
72
73    public String toString ()
74    {
75        return "CONSTANT_NameAndType: [name_index = " + m_name_index + ", descriptor_index = " + m_descriptor_index + ']';
76    }
77
78    // Cloneable: inherited clone() is Ok
79
80    // IClassFormatOutput:
81
82    public void writeInClassFormat (final UDataOutputStream out) throws IOException
83    {
84        super.writeInClassFormat (out);
85
86        out.writeU2 (m_name_index);
87        out.writeU2 (m_descriptor_index);
88    }
89
90    // protected: .............................................................
91
92
93    protected CONSTANT_NameAndType_info (final UDataInputStream bytes) throws IOException
94    {
95        m_name_index = bytes.readU2 ();
96        m_descriptor_index = bytes.readU2 ();
97    }
98
99    // package: ...............................................................
100
101    // private: ...............................................................
102
103} // end of class
104// ----------------------------------------------------------------------------
105