code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Vojtech Forejt <vojtech.forejt@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 prism;
  
  /**
   * Enumeration that represents one of the operators used in multi-objective
   * verification. Note that strict inequalities are missing as these are not
   * allowed in current implementation of multi-objective.
   */
  public enum Operator {
  	P_MAX(0), R_MAX(3), P_MIN(5), R_MIN(8), P_GE(2), R_GE(4), P_LE(7), R_LE(9);
  	   
  	private int intValue = -1;
  	
  	private Operator(int i)
  	{
  		this.intValue = i;
  	}
  	
     	/**
     	 * Returns {@code true} if op is one {@code Operator.P_MIN},
     	 * {@code Operator.R_MIN}, {@code Operator.P_LE}, or {@code Operator.R_LE}.
     	 */
  	public static boolean isMinOrLe(Operator op)
  	{
  		switch (op)
  		{
  			case P_MIN:
  			case R_MIN:
  			case P_LE:
  			case R_LE:
  				return true;
  			default:
  				return false;
  		}
  	}
  	
  	/**
  	 * Returns a number representing the current operator. These numbers
  	 * are used in the C code.
  	 */
  	public int toNumber()
  	{
  		return this.intValue;
  	}
  }
  