code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Dave Parker <david.parker@comlab.ox.ac.uk> (University of Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM 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.
  //	
  //	PRISM 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.
  //	
  //	You should have received a copy of the GNU General Public License
  //	along with PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package pta;
  
  import java.util.ArrayList;
  
  public class DBMListFactory implements ZoneFactory
  {
  	/* Basic zone creation */
  
  	private DBMFactory dbmf = new DBMFactory();
  	
  	/**
  	 * All clocks = 0
  	 */
  	public DBMList createZero(PTA pta)
  	{
  		DBMList list = new DBMList(pta);
  		list.addDBM((DBM)dbmf.createZero(pta));
  		return list;
  	}
  
  	/**
  	 * All clocks any value
  	 */
  	public DBMList createTrue(PTA pta)
  	{
  		DBMList list = new DBMList(pta);
  		list.addDBM((DBM)dbmf.createTrue(pta));
  		return list;
  	}
  
  	/**
  	 * Zone defined by set of constraints
  	 */
  	public DBMList createFromConstraints(PTA pta, Iterable<Constraint> constrs)
  	{
  		DBMList list = new DBMList(pta);
  		list.addDBM((DBM)dbmf.createFromConstraints(pta, constrs));
  		return list;
  	}
  }
  