FactorGraphLabels.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 Shell Hu 
 * Copyright (C) 2013 Shell Hu 
 */

#ifndef __FACTORGRAPH_LABELS_H__
#define __FACTORGRAPH_LABELS_H__

#include <shogun/labels/StructuredLabels.h>
#include <shogun/lib/SGVector.h>
#include <shogun/lib/StructuredData.h>
#include <shogun/lib/StructuredDataTypes.h>

namespace shogun
{

class CFactorGraphLabels;

class CFactorGraphObservation : public CStructuredData
{
public:
    STRUCTURED_DATA_TYPE(SDT_FACTOR_GRAPH);

    CFactorGraphObservation() : CStructuredData() { }

    CFactorGraphObservation(SGVector<int32_t> observed_state, 
        SGVector<float64_t> loss_weights);

    ~CFactorGraphObservation() { }

    static CFactorGraphObservation* obtain_from_generic(CStructuredData* base_data)
    {
        if ( base_data->get_structured_data_type() == SDT_FACTOR_GRAPH )
            return (CFactorGraphObservation*) base_data;
        else
            SG_SERROR("base_data must be of dynamic type CFactorGraphObservation\n")

        return NULL;
    }

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

    SGVector<int32_t> get_data() const;

    SGVector<float64_t> get_loss_weights() const;

    void set_loss_weights(SGVector<float64_t> loss_weights);

protected:
    SGVector<float64_t> m_loss_weights;

    SGVector<int32_t> m_observed_state;
};


class CFactorGraphLabels : public CStructuredLabels
{
    public:
        CFactorGraphLabels();

        CFactorGraphLabels(int32_t num_labels);

        virtual ~CFactorGraphLabels();

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

    private:
        void init();

}; /* CFactorGraphLabels */

} /* namespace shogun */

#endif /* __FACTORGRAPH_LABELS_H__ */