01: /* Soot - a J*va Optimization Framework
02: * Copyright (C) 1997-1999 Raja Vallee-Rai
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2.1 of the License, or (at your option) any later version.
08: *
09: * 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: package soot.jimple;
27:
28: import soot.*;
29: import soot.util.*;
30:
31: public class NullConstant extends Constant {
32: public NullConstant(Singletons.Global g) {
33: }
34:
35: public static NullConstant v() {
36: return G.v().soot_jimple_NullConstant();
37: }
38:
39: public boolean equals(Object c) {
40: return c == G.v().soot_jimple_NullConstant();
41: }
42:
43: public int hashCode() {
44: return 982;
45: }
46:
47: public String toString() {
48: return Jimple.NULL;
49: }
50:
51: public Type getType() {
52: return NullType.v();
53: }
54:
55: public void apply(Switch sw) {
56: ((ConstantSwitch) sw).caseNullConstant(this);
57: }
58: }
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