/*
    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
	{
		class SMART_COMPARATOR_API Bhattacharyya : public SimilarityFunction
		{
		public:
			Bhattacharyya(Matrices::SuperMatrixPtr pMatrix, bool pMatrixNormalized = false);
			virtual ~Bhattacharyya();

			virtual double CountSimilarity(
				Matrices::CompressedVector& v1,
				Matrices::CompressedVector& v2,
				size_t 						v1ind,
				size_t 						v2ind,
				const std::set<size_t>&		v1Ind,
				const std::set<size_t>&		v2Ind);

			double MinValue() const;

		private:
			bool mMatrixNormalized;
		};
	}
}
