TensorProductPairKernel.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) 2009 Soeren Sonnenburg
 * Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _TPPKKERNEL_H___
#define _TPPKKERNEL_H___

#include <shogun/lib/common.h>
#include <shogun/kernel/DotKernel.h>
#include <shogun/features/DenseFeatures.h>

namespace shogun
{
class CTensorProductPairKernel: public CDotKernel
{
    public:
        CTensorProductPairKernel();

        CTensorProductPairKernel(int32_t size, CKernel* subkernel);

        CTensorProductPairKernel(CDenseFeatures<int32_t> *l, CDenseFeatures<int32_t> *r, CKernel* subkernel);

        virtual ~CTensorProductPairKernel();

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

        virtual EKernelType get_kernel_type() { return K_TPPK; }

        /* register the parameters
         */
        virtual void register_params();

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

        inline virtual EFeatureClass get_feature_class() { return C_DENSE; }

        virtual EFeatureType get_feature_type() { return F_INT; }

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

    protected:
        CKernel* subkernel;
};
}
#endif /* _TPPKKERNEL_H__ */