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Java > Open Source Codes > soot > grimp > internal > ObjExprBox


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1999 Patrick Lam
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
27 package soot.grimp.internal;
28
29 import soot.*;
30 import soot.jimple.*;
31
32 public class ObjExprBox extends ExprBox
33 {
34     /* an ExprBox which can only contain object-looking references */
35     public ObjExprBox(Value value)
36     {
37         super(value);
38     }
39
40     public boolean canContainValue(Value value)
41     {
42         return value instanceof ConcreteRef ||
43             value instanceof InvokeExpr ||
44         value instanceof NewArrayExpr ||
45         value instanceof NewMultiArrayExpr ||
46             value instanceof Local ||
47         value instanceof NullConstant ||
48         value instanceof StringConstant ||
49         value instanceof ClassConstant ||
50             (value instanceof CastExpr &&
51                 canContainValue(((CastExpr)value).getOp()));
52     }
53 }
54
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