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Java > Open Source Codes > proguard > evaluation > value > TopValue


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */

21 package proguard.evaluation.value;
22
23 import proguard.classfile.ClassConstants;
24
25 /**
26  * This class represents a partially evaluated top value. A top value is the
27  * dummy value that takes up the extra space when storing a long value or a
28  * double value.
29  *
30  * @author Eric Lafortune
31  */

32 public class TopValue extends Category1Value
33 {
34     // Implementations for Value.
35

36     public final Value generalize(Value other)
37     {
38         return this.getClass() == other.getClass() ? this : null;
39     }
40
41     public final int computationalType()
42     {
43         return TYPE_TOP;
44     }
45
46     public final String JavaDoc internalType()
47     {
48         return null;
49     }
50
51
52     // Implementations for Object.
53

54     public boolean equals(Object JavaDoc object)
55     {
56         return object != null &&
57                this.getClass() == object.getClass();
58     }
59
60
61     public int hashCode()
62     {
63         return this.getClass().hashCode();
64     }
65
66
67     public String JavaDoc toString()
68     {
69         return "T";
70     }
71 }
72
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