SimilarityFunctors.hpp

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/* 
 * SimilarityFunctors.hpp 
 *
 * This file is part of the Chemical Data Processing Toolkit
 *
 * Copyright (C) 2003 Thomas Seidel <thomas.seidel@univie.ac.at>
 *
 * This library 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 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
#ifndef CDPL_DESCR_SIMILARITYFUNCTORS_HPP
#define CDPL_DESCR_SIMILARITYFUNCTORS_HPP
 
#include "CDPL/Descr/SimilarityFunctions.hpp"
 
 
namespace CDPL
{
 
    namespace Descr
    {
 
        class TanimotoSimilarity
        {
 
          public:
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcTanimotoSimilarity(bs1, bs2);
            }
 
            template <typename V>
            double operator()(const V& v1, const V& v2) const
            {
                return calcTanimotoSimilarity(v1, v2);
            }
        };
 
        class CosineSimilarity
        {
 
          public:
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcCosineSimilarity(bs1, bs2);
            }
 
            template <typename V>
            double operator()(const V& v1, const V& v2) const
            {
                return calcCosineSimilarity(v1, v2);
            }
        };
 
        class EuclideanSimilarity
        {
 
          public:
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcEuclideanSimilarity(bs1, bs2);
            }
        };
 
        class ManhattanSimilarity
        {
 
          public:
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcManhattanSimilarity(bs1, bs2);
            }
        };
 
        class DiceSimilarity
        {
 
          public:
             double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
             {
                return calcDiceSimilarity(bs1, bs2);
            }
        };
 
        class TverskySimilarity
        {
 
          public:
            TverskySimilarity(double alpha = 0.95, double beta = 0.05):
                alpha(alpha), beta(beta) {}
 
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcTverskySimilarity(bs1, bs2, alpha, beta);
            }
 
          private:
            double alpha;
            double beta;
        };
 
        class HammingDistance
        {
 
          public:
            std::size_t operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcHammingDistance(bs1, bs2);
            }
        };
 
        class ManhattanDistance
        {
 
          public:
            template <typename V>
            double operator()(const V& v1, const V& v2) const
            {
                return calcManhattanDistance(v1, v2);
            }
        };
 
        class EuclideanDistance
        {
 
          public:
            double operator()(const Util::BitSet& bs1, const Util::BitSet& bs2) const
            {
                return calcEuclideanDistance(bs1, bs2);
            }
 
            template <typename V>
            double operator()(const V& v1, const V& v2) const
            {
                return calcEuclideanDistance(v1, v2);
            }
        };
        
    } // namespace Descr
} // namespace CDPL
 
#endif // CDPL_DESCR_SIMILARITYFUNCTORS_HPP