code: //==============================================================================
  //	
  //	Copyright (c) 2013-
  //	Authors:
  //	* Ernst Moritz Hahn <emhahn@cs.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 param;
  
  import java.math.BigInteger;
  
  /**
   * @author Ernst Moritz Hahn <emhahn@cs.ox.ac.uk> (University of Oxford)
   */
  abstract class DagOperator {
  	private BigInteger cValue;
  	DagOperator(BigInteger cValue) {
  		this.cValue = cValue;
  	}
  	BigInteger getCValue() {
  		return cValue;
  	}
  	
  	@Override
  	public int hashCode() {
  		return cValue.hashCode();
  	}
  	
  	@Override
  	public boolean equals(Object obj) {
  		if (!(obj instanceof DagOperator)) {
  			return false;
  		}
  		DagOperator other = (DagOperator) obj;
  		return this.cValue.equals(other.cValue);
  	}
  }
  