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Java > Open Source Codes > soot > coffi > CONSTANT_Fieldref_info


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1997 Clark Verbrugge
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 /*
21  * Modified by the Sable Research Group and others 1997-1999.
22  * See the 'credits' file distributed with Soot for the complete list of
23  * contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
24  */
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32 package soot.coffi;
33
34 import java.io.*;
35
36 /** A constant pool entry of type CONSTANT_Fieldref.
37  * @see cp_info
38  * @author Clark Verbrugge
39  */
40 class CONSTANT_Fieldref_info extends cp_info {
41    /** Constant pool index of a CONSTANT_Class object.
42     * @see CONSTANT_Class_info
43     */
44    public int class_index;
45    /** Constant pool index of a CONSTANT_NameAndType object.
46     * @see CONSTANT_NameAndType_info
47     */
48    public int name_and_type_index;
49    /** Returns the size of this cp_info object.
50     * @return number of bytes occupied by this object.
51     * @see cp_info#size
52     */
53    public int size() { return 5; }
54    /** Returns a String representation of this entry.
55     * @param constant_pool constant pool of ClassFile.
56     * @return String representation of this entry.
57     * @see cp_info#toString
58     */
59    public String JavaDoc toString(cp_info constant_pool[]) {
60       CONSTANT_Class_info cc = (CONSTANT_Class_info)(constant_pool[class_index]);
61       CONSTANT_NameAndType_info cn =
62          (CONSTANT_NameAndType_info)(constant_pool[name_and_type_index]);
63       return cc.toString(constant_pool) + "." + cn.toString(constant_pool);
64    }
65    /** Returns a String description of what kind of entry this is.
66     * @return the String "fieldref".
67     * @see cp_info#typeName
68     */
69    public String JavaDoc typeName() { return "fieldref"; }
70    /** Compares this entry with another cp_info object (which may reside
71     * in a different constant pool).
72     * @param constant_pool constant pool of ClassFile for this.
73     * @param cp constant pool entry to compare against.
74     * @param cp_constant_pool constant pool of ClassFile for cp.
75     * @return a value <0, 0, or >0 indicating whether this is smaller,
76     * the same or larger than cp.
77     * @see cp_info#compareTo
78     */
79    public int compareTo(cp_info constant_pool[],cp_info cp,cp_info cp_constant_pool[]) {
80       int i;
81       if (tag!=cp.tag) return tag-cp.tag;
82       CONSTANT_Fieldref_info cu = (CONSTANT_Fieldref_info)cp;
83       i = constant_pool[class_index].
84          compareTo(constant_pool,cp_constant_pool[cu.class_index],cp_constant_pool);
85       if (i!=0) return i;
86       return constant_pool[name_and_type_index].
87          compareTo(constant_pool,cp_constant_pool[cu.name_and_type_index],
88                    cp_constant_pool);
89    }
90 }
91
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