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_ref_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.lib.UDataInputStream;
14import com.vladium.jcd.lib.UDataOutputStream;
15
16// ----------------------------------------------------------------------------
17/**
18 * Abstract base for all CONSTANT_XXXref_info structures. They all have a constant
19 * pool pointer to a {@link CONSTANT_Class_info} and {@link CONSTANT_NameAndType_info}
20 * entries.<P>
21 *
22 * The value of the class_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_Class_info}
24 * structure representing the class or interface type that contains the declaration
25 * of the field or method.<P>
26 *
27 * The class_index item of a {@link CONSTANT_Fieldref_info} or a {@link CONSTANT_Methodref_info}
28 * structure must be a class type, not an interface type. The class_index item of
29 * a {@link CONSTANT_InterfaceMethodref_info} structure must be an interface type
30 * that declares the given method.
31 *
32 * @see CONSTANT_Fieldref_info
33 * @see CONSTANT_Methodref_info
34 * @see CONSTANT_InterfaceMethodref_info
35 *
36 * @author (C) 2001, Vlad Roubtsov
37 */
38public
39abstract class CONSTANT_ref_info extends CONSTANT_info
40{
41    // public: ................................................................
42
43
44    public int m_class_index;
45    public int m_name_and_type_index;
46
47    // IClassFormatOutput:
48
49    public void writeInClassFormat (final UDataOutputStream out) throws IOException
50    {
51        super.writeInClassFormat (out);
52
53        out.writeU2 (m_class_index);
54        out.writeU2 (m_name_and_type_index);
55    }
56
57    // Cloneable: inherited clone() is Ok
58
59    // protected: .............................................................
60
61
62    protected CONSTANT_ref_info (final UDataInputStream bytes)
63        throws IOException
64    {
65        m_class_index = bytes.readU2 ();
66        m_name_and_type_index = bytes.readU2 ();
67    }
68
69    protected CONSTANT_ref_info (final int class_index, final int name_and_type_index)
70    {
71        m_class_index = class_index;
72        m_name_and_type_index = name_and_type_index;
73    }
74
75    // package: ...............................................................
76
77    // private: ...............................................................
78
79} // end of class
80// ----------------------------------------------------------------------------
81