/* Soot - a J*va Optimization Framework
* Copyright (C) 2002 Florian Loitsch
*
* 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.
*/
/*
* Modified by the Sable Research Group and others 1997-1999.
* See the 'credits' file distributed with Soot for the complete list of
* contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
*/
package soot.toolkits.scalar;
import java.util.*;
/**
* Provides an interface of a flow universe, used by an implementation
* of BoundedFlowSet to do complementation.
*/
public interface FlowUniverse<E> {
/**
* returns the number of elements of the universe.
*
* @return the size of the universe.
*/
public int size();
/**
* returns an iterator over the elements of the universe.
*
* @return an Iterator over the elements.
*/
public Iterator<E> iterator();
/**
* returns the elements of the universe in form of an array.<br>
* The returned array could be backed or not. If you want to be sure
* that it is unbacked, clone() it.
*
* @return the elements of the universe.
*/
public E[] toArray();
}