KernelDistance.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) 2010 Christian Widmer
 * Copyright (C) 2010 Max-Planck-Society
 */

#include <shogun/lib/config.h>


#ifndef _KERNELDISTANCE_H___
#define _KERNELDISTANCE_H___

#include <shogun/lib/common.h>
#include <shogun/distance/Distance.h>
#include <shogun/kernel/Kernel.h>

namespace shogun
{
    class CDistance;

class CKernelDistance: public CDistance
{
    public:
        CKernelDistance();

        CKernelDistance(float64_t width, CKernel* k);

        CKernelDistance(
            CFeatures *l, CFeatures *r, float64_t width, CKernel* k);

        virtual ~CKernelDistance();

        virtual bool init(CFeatures* l, CFeatures* r);

        inline virtual EDistanceType get_distance_type() { return D_UNKNOWN; }
        inline virtual EFeatureType get_feature_type() { return kernel->get_feature_type(); }

        inline virtual EFeatureClass get_feature_class() { return kernel->get_feature_class(); }

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

        inline virtual void cleanup() { return kernel->cleanup(); }

    protected:
        float64_t compute(int32_t idx_a, int32_t idx_b);

    private:
        void init();

    private:
        CKernel* kernel;
        float64_t width;
};
}
#endif /* _KERNELDISTANCE_H__ */