StringDistance.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2006-2009 Christian Gehl
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _STRINGDISTANCE_H___
#define _STRINGDISTANCE_H___

#include <shogun/lib/config.h>

#include <shogun/distance/Distance.h>
#include <shogun/features/StringFeatures.h>

namespace shogun
{
template <class ST> class CStringDistance : public CDistance
{
    public:
        CStringDistance() : CDistance() {}

        /* when training data is supplied as both l and r do_init
         * should be true
        */
        virtual bool init(CFeatures* l, CFeatures* r)
        {
            CDistance::init(l,r);

            ASSERT(l->get_feature_class()==C_STRING)
            ASSERT(r->get_feature_class()==C_STRING)
            ASSERT(l->get_feature_type()==this->get_feature_type())
            ASSERT(r->get_feature_type()==this->get_feature_type())
            return true;
        }

        virtual EFeatureClass get_feature_class() { return C_STRING; }

        virtual EFeatureType get_feature_type();

        virtual const char* get_name() const {
            return "StringDistance"; }

        virtual void cleanup()=0;

        virtual EDistanceType get_distance_type()=0;
};

template<> inline EFeatureType CStringDistance<float64_t>::get_feature_type() { return F_DREAL; }

template<> inline EFeatureType CStringDistance<uint64_t>::get_feature_type() { return F_ULONG; }

template<> inline EFeatureType CStringDistance<int32_t>::get_feature_type() { return F_INT; }

template<> inline EFeatureType CStringDistance<uint16_t>::get_feature_type() { return F_WORD; }

template<> inline EFeatureType CStringDistance<int16_t>::get_feature_type() { return F_SHORT; }

template<> inline EFeatureType CStringDistance<uint8_t>::get_feature_type() { return F_BYTE; }

template<> inline EFeatureType CStringDistance<char>::get_feature_type() { return F_CHAR; }

} // namespace shogun
#endif