SplittingStrategy.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) 2011 Heiko Strathmann
 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
 */

#ifndef __SPLITTINGSTRATEGY_H_
#define __SPLITTINGSTRATEGY_H_

#include <shogun/base/SGObject.h>
#include <shogun/lib/DynamicArray.h>
#include <shogun/lib/DynamicObjectArray.h>

namespace shogun
{

class CLabels;

class CSplittingStrategy: public CSGObject
{
public:
    CSplittingStrategy();

    CSplittingStrategy(CLabels* labels, index_t num_subsets);

    virtual ~CSplittingStrategy();

    SGVector<index_t> generate_subset_indices(index_t subset_idx);

    SGVector<index_t> generate_subset_inverse(index_t subset_idx);

    index_t get_num_subsets() const {
        return m_subset_indices->get_num_elements();
    }

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

protected:
    virtual void build_subsets()=0;

private:
    void init();

protected:

    CLabels* m_labels;
    CDynamicObjectArray<CDynamicArray<index_t> >* m_subset_indices;
};
}

#endif /* __SPLITTINGSTRATEGY_H_ */