KernelNormalizer.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) 2008-2009 Soeren Sonnenburg
 * Copyright (C) 2008-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _KERNELNORMALIZER_H___
#define _KERNELNORMALIZER_H___

#include <shogun/kernel/Kernel.h>
#include <shogun/base/Parameter.h>

namespace shogun
{

enum ENormalizerType
{
    N_REGULAR = 0,
    N_MULTITASK = 1
};

class CKernel;
class CKernelNormalizer : public CSGObject
{
    public:

        CKernelNormalizer() : CSGObject()
        {
            register_params();
            m_type = N_REGULAR;
        }

        virtual ~CKernelNormalizer() { }

        virtual bool init(CKernel* k)=0;

        virtual float64_t normalize(
            float64_t value, int32_t idx_lhs, int32_t idx_rhs)=0;

        virtual float64_t normalize_lhs(float64_t value, int32_t idx_lhs)=0;

        virtual float64_t normalize_rhs(float64_t value, int32_t idx_rhs)=0;

        virtual void register_params()
        {
            SG_ADD((machine_int_t*) &m_type, "m_type", "Normalizer type.",
                MS_NOT_AVAILABLE);
        }

        ENormalizerType get_normalizer_type()
        {
            return m_type;
        }

        void set_normalizer_type(ENormalizerType type)
        {
            m_type = type;
        }

    protected:
        ENormalizerType m_type;
};
}
#endif