CombinedFeatures.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) 1999-2009 Soeren Sonnenburg
 * Written (W) 1999-2008 Gunnar Raetsch
 * Written (W) 2012 Heiko Strathmann
 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
 */

#ifndef _CCOMBINEDFEATURES__H__
#define _CCOMBINEDFEATURES__H__

#include <shogun/features/Features.h>
#include <shogun/lib/DynamicObjectArray.h> 

namespace shogun
{
class CFeatures; 
class CDynamicObjectArray;

class CCombinedFeatures : public CFeatures
{
    public:
        CCombinedFeatures();
        CCombinedFeatures(const CCombinedFeatures& orig);

        virtual CFeatures* duplicate() const;

        virtual ~CCombinedFeatures();

        virtual EFeatureType get_feature_type() const
        {
            return F_UNKNOWN;
        }

        virtual EFeatureClass get_feature_class() const
        {
            return C_COMBINED;
        }

        virtual int32_t get_num_vectors() const
        {
            return m_subset_stack->has_subsets()
                    ? m_subset_stack->get_size() : num_vec;
        }

        void list_feature_objs();

        bool check_feature_obj_compatibility(CCombinedFeatures* comb_feat);

        CFeatures* get_first_feature_obj();
        
        CFeatures* get_feature_obj(int32_t idx);

        CFeatures* get_last_feature_obj();

        bool insert_feature_obj(CFeatures* obj, int32_t idx);

        bool append_feature_obj(CFeatures* obj);

        bool delete_feature_obj(int32_t idx);

        int32_t get_num_feature_obj();

        CFeatures* create_merged_copy(CFeatures* other);

        virtual void add_subset(SGVector<index_t> subset);

        virtual void remove_subset();

        virtual void remove_all_subsets();

        virtual CFeatures* copy_subset(SGVector<index_t> indices);

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

    private:
        void init();

    protected:
        CDynamicObjectArray* feature_array;

        int32_t num_vec;
};
}
#endif