GradientEvaluation.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) 2013 Roman Votyakov
 * Copyright (C) 2012 Jacob Walker
 */

#ifndef CGRADIENTEVALUATION_H_
#define CGRADIENTEVALUATION_H_

#include <shogun/evaluation/MachineEvaluation.h>
#include <shogun/evaluation/DifferentiableFunction.h>
#include <shogun/evaluation/EvaluationResult.h>

namespace shogun
{

class CGradientEvaluation: public CMachineEvaluation
{
public:
    CGradientEvaluation();

    CGradientEvaluation(CMachine* machine, CFeatures* features, CLabels* labels,
            CEvaluation* evaluation_criterion, bool autolock=true);

    virtual ~CGradientEvaluation();

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

    virtual CEvaluationResult* evaluate();

    inline void set_function(CDifferentiableFunction* diff)
    {
        SG_REF(diff);
        SG_UNREF(m_diff);
        m_diff=diff;
    }

    inline CDifferentiableFunction* get_function()
    {
        SG_REF(m_diff);
        return m_diff;
    }

private:
    void init();

    void update_parameter_dictionary();

private:
    CDifferentiableFunction* m_diff;

    CMap<TParameter*, CSGObject*>*  m_parameter_dictionary;
};
}
#endif /* CGRADIENTEVALUATION_H_ */