AUCKernel.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) 1999-2008 Gunnar Raetsch
 * Written (W) 2009 Soeren Sonnnenburg
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _AUCKERNEL_H___
#define _AUCKERNEL_H___

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

namespace shogun
{
    class CLabels;
    template <class T> class CDenseFeatures;

class CAUCKernel: public CDotKernel
{
    void init();

    public:
        CAUCKernel();

        CAUCKernel(int32_t size, CKernel* subkernel);

        virtual ~CAUCKernel();

        CLabels* setup_auc_maximization(CLabels* labels);

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

        virtual EKernelType get_kernel_type() { return K_AUC; }

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

        inline virtual EFeatureClass get_feature_class() { return C_DENSE; }

        virtual EFeatureType get_feature_type() { return F_WORD; }

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

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