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Java > Open Source Codes > soot > PointsToSet


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2002 Ondrej Lhotak
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 package soot;
21 import java.util.*;
22
23 /** A generic interface to some set of runtime objects computed by a
24  * pointer analysis.
25  * @author Ondrej Lhotak
26  */
27 public interface PointsToSet {
28     /** Returns true if this set contains no run-time objects. */
29     public boolean isEmpty();
30     /** Returns true if this set shares some objects with other. */
31     public boolean hasNonEmptyIntersection( PointsToSet other );
32     /** Set of all possible run-time types of objects in the set. */
33     public Set possibleTypes();
34
35     /** If this points-to set consists entirely of string constants,
36      * returns a set of these constant strings.
37      * If this point-to set may contain something other than constant
38      * strings, returns null. */
39     public Set possibleStringConstants();
40
41     /** If this points-to set consists entirely of objects of
42      * type java.lang.Class of a known class,
43      * returns a set of ClassConstant's that are these classes.
44      * If this point-to set may contain something else, returns null. */
45     public Set possibleClassConstants();
46 }
47
48
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