/*
    Copyright (C) 2012 Bartosz Broda, Jacek Bochenek, Łukasz Biłeńkij, 
    Damian Jaworski, Wojciech Mazur, Dominik Piasecki, Maciej Piasecki, 
    Radosław Ramocki
    
    This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your option)
any later version.

    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 LICENSE and COPYING files for more details.
*/

#pragma once
#include "../comparator_stdheaders.h"
#include "SimilarityFunction.h"

namespace smartcomparator
{
	namespace simfunctions
	{
		/**
		  * \todo Is this function working properly? Is this function symmetrical?
		  */
		class SMART_COMPARATOR_API EhlertSimilarity  : public SimilarityFunction
		{
		public:
			EhlertSimilarity(Matrices::SuperMatrixPtr m,double delta = 0.75,double gamma = 0.75,
				double alpha = 1.1);
			virtual ~EhlertSimilarity(void);

			virtual double CountSimilarity(Matrices::CompressedVector& v1, Matrices::CompressedVector& v2,
				size_t v1ind, size_t v2ind, const std::set<size_t> &filteredIndices);

		private:
			double delta;
			double gamma;
			double alpha;


			double DivergenceToSim(double div);
		};
	}
}
