code: /*
   * This file is part of a Java port of the program ltl2dstar
   * (http://www.ltl2dstar.de/) for PRISM (http://www.prismmodelchecker.org/)
   * Copyright (C) 2005-2007 Joachim Klein <j.klein@ltl2dstar.de>
   * Copyright (c) 2007 Carlos Bederian
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as 
   *  published by the Free Software Foundation.
   *
   * 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.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package jltl2dstar;
  
  import prism.PrismException;
  
  /** Accessor for the acceptance signature for a state 
   *  (part of AcceptanceCondition interface)
   */
  public class AcceptanceForState {
  
  	/** Reference to the underlying RabinAcceptance */
  	private RabinAcceptance _acceptance;
  	/** The state index for this accessor */
  	private int _state_index;
  
  	/** Constructor */
  	public AcceptanceForState(RabinAcceptance acceptance, int state_index) {
  		_acceptance = acceptance;
  		_state_index = state_index;
  	}
  
  	/** Add this state to L[pair_index] */
  	public void addTo_L(int pair_index) {
  		_acceptance.getAcceptance_L(pair_index).set(_state_index);
  		_acceptance.getAcceptance_U(pair_index).set(_state_index, false);
  	}
  
  	/** Add this state to U[pair_index] */
  	public void addTo_U(int pair_index) {
  		_acceptance.getAcceptance_U(pair_index).set(_state_index);
  		_acceptance.getAcceptance_L(pair_index).set(_state_index, false);
  	}
  
  	/** Is this state in L[pair_index] */
  	public boolean isIn_L(int pair_index) {
  		return _acceptance.isStateInAcceptance_L(pair_index, _state_index);
  	}
  
  	/** Is this state in U[pair_index] */
  	public boolean isIn_U(int pair_index) {
  		return _acceptance.isStateInAcceptance_U(pair_index, _state_index);
  	}
  
  	/** Set L and U for this state according to RabinSignature */
  	public void setSignature(RabinSignature signature) {
  		for (int i = 0; i < signature.size(); i++) {
  			if (signature.getL().get(i)) {
  				addTo_L(i);
  			}
  			if (signature.getU().get(i)) {
  				addTo_U(i);
  			}
  		}
  	}
  
  	/** Get number of acceptance pairs */
  	public int size() throws PrismException {
  		return _acceptance.size();
  	}
  
  	/** Get the signature for this state */
  	RabinSignature getSignature() throws PrismException {
  		return new RabinSignature(_acceptance.getAcceptance_L_forState(_state_index),
  				_acceptance.getAcceptance_U_forState(_state_index),
  				_acceptance.size());
  	}
  }
  