/* Soot - a J*va Optimization Framework
* Copyright (C) 2003 Ondrej Lhotak
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
package soot.jimple.toolkits.pointer;
import java.util.Set;
import soot.PointsToSet;
import soot.jimple.ClassConstant;
/** A generic interface to some set of runtime objects computed by a pointer analysis. */
public abstract class Union implements PointsToSet {
/** Adds all objects in s into this union of sets, returning true if this
* union was changed. */
public abstract boolean addAll( PointsToSet s );
public static boolean hasNonEmptyIntersection( PointsToSet s1, PointsToSet s2 ) {
if( s1 == null ) return false;
if( s1 instanceof Union ) return s1.hasNonEmptyIntersection( s2 );
if( s2 == null ) return false;
return s2.hasNonEmptyIntersection( s1 );
}
public Set<String> possibleStringConstants() { return null; }
public Set<ClassConstant> possibleClassConstants() { return null; }
}