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 /* 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.

Returns:
the size of the universe.
  public int size();

  
returns an iterator over the elements of the universe.

Returns:
an Iterator over the elements.
  public Iterator<E> iterator();

  
returns the elements of the universe in form of an array.
The returned array could be backed or not. If you want to be sure that it is unbacked, clone() it.

Returns:
the elements of the universe.
  public E[] toArray();
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