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Java > Open Source Codes > soot > jimple > NullConstant


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1997-1999 Raja Vallee-Rai
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  */
25
26
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28
29
30 package soot.jimple;
31
32 import soot.*;
33 import soot.util.*;
34 import java.util.*;
35
36 public class NullConstant extends Constant
37 {
38     public NullConstant( Singletons.Global g ) {}
39     public static NullConstant v() { return G.v().soot_jimple_NullConstant(); }
40
41     public boolean equals(Object JavaDoc c)
42     {
43         return c == G.v().soot_jimple_NullConstant();
44     }
45
46     public int hashCode()
47     {
48         return 982;
49     }
50
51     public String JavaDoc toString()
52     {
53         return Jimple.NULL;
54     }
55
56     public Type getType()
57     {
58         return NullType.v();
59     }
60
61     public void apply(Switch sw)
62     {
63         ((ConstantSwitch) sw).caseNullConstant(this);
64     }
65 }
66
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