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 jltl2ba.APSet;
  import prism.PrismException;
  
  /**
   * Convert an NBA to a DRA using Safra's algorithm
   */
  public class NBA2DRA {
  
  	/** The options */
  	private Options_Safra _options;
  	/** Save detailed information on the Safra trees in the states? */
  	private boolean _detailed_states;
  
  	// stuttering
  	// private StutterSensitivenessInformation _stutter_information;
  
  
  	/** Constructor */
  	public NBA2DRA() {
  		_detailed_states = false;
  	}
  
  	/** Constructor.
  	 * @param options Options_Safra specifying whether to stutter, etc...
  	 * @param detailedStates generate detailed descriptions for the states?
  	 * @param stutter_information Information about the symbols that may be stuttered
  	 */
  	public NBA2DRA(Options_Safra options, boolean detailedStates) {
  //	public NBA2DRA(Options_Safra options, boolean detailedStates, StutterSensitivenessInformation stutter_information) {
  		
  		_options = options;
  		_detailed_states = detailedStates;
  	// _stutter_information = stutter_information;
  	}
  
  	/**
  	 * Convert an NBA to an DRA (having APElements as edge labels).
  	 * Throws LimitReachedException if a limit is set (>0) and
  	 * there are more states in the generated DRA than the limit. 
  	 * @param nba the NBA
  	 * @param dra_result the DRA where the result is stored 
  	 *        (has to have same APSet as the nba)
  	 * @param limit a limit for the number of states (0 disables the limit).
  	 */
  	public DRA convert(NBA nba, int limit) throws PrismException {
  
  		if (nba.size() == 0 || nba.getStartState() == null ) {
  			// the NBA is empty -> construct DRA that is empty
  
  			APSet ap_set = nba.getAPSet();
  			DRA dra_result = new DRA(ap_set);
  
  			dra_result.constructEmpty();
  			return dra_result;
  		}
  		// nba.print(System.out);
  
  		if (_options.dba_check && nba.isDeterministic()) {
  			return DBA2DRA.dba2dra(nba, false);
  		}
  
  		/*		if (_options.stutter_closure) {
  			if (_stutter_information != null &&	!_stutter_information.isCompletelyInsensitive()) {
  				System.err.println("WARNING: NBA might not be 100% stutter insensitive, applying stutter closure can create invalid results!");
  			}
  
  			boost::shared_ptr<NBA_t> nba_closed=
  				NBAStutterClosure::stutter_closure(nba);
  
  			if (can_stutter()) {      
  				convert_safra_stuttered(*nba_closed, dra_result, limit);
  				return;
  			}
  
  			convert_safra(*nba_closed,dra_result,limit);
  			return;
  		}
  
  
  		if (can_stutter()) {      
  			convert_safra_stuttered(nba, dra_result, limit);
  			return;
  		}
  		 */
  		return convert_safra(nba, limit);
  	}
  
  	/** 
  	 * Is stuttering allowed?
  	 */
  /*	public boolean can_stutter() {
  		if (_stutter_information == null) {
  			return false;
  		}
  
  		if (_options.stutter && _stutter_information.isCompletelyInsensitive()) {
  			return true;
  		}
  
  		if (_options.stutter && _stutter_information.isPartiallyInsensitive()) {
  			return true;
  		}
  
  		return false;
  	}
  */
  
  	/**
  	 * Provides CandidateMatcher for SafraTrees
  	 */
  	/*	class SafraTreeCandidateMatcher {
  		public:
  			static bool isMatch(const SafraTreeTemplate_ptr temp, const SafraTree_ptr tree) {
  		return temp->matches(*tree);
  	};
  
  	static bool abstract_equal_to(const SafraTree_ptr t1, const SafraTree_ptr t2) {
  		return t1->structural_equal_to(*t2);
  	}
  
  	static bool abstract_less_than(const SafraTree_ptr t1, const SafraTree_ptr t2) {
  		return t1->structural_less_than(*t2);
  	}
  
  	template <typename HashFunction>
  	static void abstract_hash_code(HashFunction& hash, SafraTree_ptr t) {
  		t->hashCode(hash, true);
  	}
  	};
  	 */
  
  
  	/**
  	 * Convert the NBA to a DRA using Safra's algorithm
  	 * @param nba the NBA
  	 * @param dra_result the result DRA
  	 * @param limit limit for the size of the DRA
  	 */
  	public DRA convert_safra(NBA nba, int limit) throws PrismException {
  
  		SafrasAlgorithm safras_algo = new SafrasAlgorithm(nba, _options);
  		
  		APSet ap_set = nba.getAPSet();
  		DRA dra_result = new DRA(ap_set);
  
  		if (!_options.opt_rename) {
  			SafraNBA2DRA nba2da = new SafraNBA2DRA(_detailed_states);
  			nba2da.convert(safras_algo, dra_result, limit, new StateMapper<SafraTreeTemplate,SafraTree,DA_State>());
  			return dra_result;
  		} else {
  			SafraNBA2DRA nba2da_fuzzy = new SafraNBA2DRA(_detailed_states);
  			nba2da_fuzzy.convert(safras_algo, dra_result, limit, new StateMapperFuzzy<SafraTreeCandidateMatcher>());
  			return dra_result;
  		}
  	}
  
  
  	/**
  	 * Convert the NBA to a DRA using Safra's algorithm, using stuttering
  	 * @param nba the NBA
  	 * @param dra_result the result DRA
  	 * @param limit limit for the size of the DRA
  	 */  
  /*	public DRA convert_safra_stuttered(NBA nba, unsigned int limit) {
  		StutteredNBA2DA<safra_t, DRA_t> nba2dra_stuttered = new StutteredNBA2DA(_detailed_states, _stutter_information);
  		return nba2dra_stuttered.convert(safras_algo, limit);
  	}
  */
  }
  