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Java > Open Source Codes > jbet > CpInteger


1 /*
2  * JBET - Java Binary Enhancement Tool
3  * Copyright (c) 2003 Networks Associates Technology, Inc.
4  *
5  * This software was developed under DARPA/SPAWAR contract
6  * N66001-00-C-8602 "SPMA" as part of the
7  * DARPA OASIS research program.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  * notice, this list of conditions and the following disclaimer in the
16  * documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30
31 /**
32  * Represent an integer constant record in the constant pool. Integer
33  * constants can be represented either as inline data with the
34  * instructions, or using records in the constant pool. The decision
35  * can be arbitrary, but a rational criteria would be to conserve
36  * space and store in the constant pool values that recur. Integer
37  * constants that are stored in the constant pool are unique (i.e.,
38  * all code that uses the same value refers to the same record).
39  *
40  * $Id: CpInteger.java,v 1.4 2003/09/09 17:31:53 areisse Exp $
41  *
42  * @author Larry D'Anna
43  * @author Lee Badger
44  * @version 0.1
45  */
46 package jbet;
47 import java.io.*;
48
49 class CpInteger extends CpEntry {
50     int value;
51
52     CpInteger(int i, CPInterface cp) {
53     super(i, CPInterface.CONSTANT_Integer, cp);
54     }
55
56     CpInteger (CPInterface cp, int val) {
57     super(cp.poolCount(), CPInterface.CONSTANT_Integer, cp);
58     value = val;
59     }
60
61     public String JavaDoc toString() {
62     return String.valueOf(value);
63     }
64     public int hashCode() {
65     return 17 * value;
66     }
67
68     public boolean equals(Object JavaDoc o) {
69     return (o instanceof CpInteger) && ((CpInteger)o).value == value;
70     }
71
72     void write(DataOutputStream dataOut) throws IOException {
73     dataOut.writeByte(tag);
74     dataOut.writeInt(value);
75     }
76 }
77
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