/**
 * State.java - a simple search state interface for stochastic local
 * search.
 * See http://cs.gettysburg.edu/~tneller/resources/sls/ for details.
 *
 * @author Todd Neller
 * @version 1.0
 *

Copyright (C) 2005 Todd Neller

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

Information about the GNU General Public License is available online at:
  http://www.gnu.org/licenses/
To receive a copy of the GNU General Public License, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.

 */

public interface State extends Cloneable { 
	void step();
	void undo();
	double energy();
	Object clone();
}