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Java > Open Source Codes > soot > jimple > toolkits > pointer > Union


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2003 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.jimple.toolkits.pointer;
21 import java.util.*;
22 import soot.*;
23
24 /** A generic interface to some set of runtime objects computed by a pointer analysis. */
25 public abstract class Union implements PointsToSet {
26     /** Adds all objects in s into this union of sets, returning true if this
27      * union was changed. */
28     public abstract boolean addAll( PointsToSet s );
29
30     public static boolean hasNonEmptyIntersection( PointsToSet s1, PointsToSet s2 ) {
31         if( s1 == null ) return false;
32         if( s1 instanceof Union ) return s1.hasNonEmptyIntersection( s2 );
33         if( s2 == null ) return false;
34         return s2.hasNonEmptyIntersection( s1 );
35     }
36     public Set possibleStringConstants() { return null; }
37     public Set possibleClassConstants() { return null; }
38
39 }
40
41
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