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
 * 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/List.h>

namespace shogun
{
class CFeatures;
class CList;
class CListElement;

class CCombinedFeatures : public CFeatures
{
    void init(void);

    public:
        CCombinedFeatures();
        CCombinedFeatures(const CCombinedFeatures& orig);

        virtual CFeatures* duplicate() const;

        virtual ~CCombinedFeatures();

        inline virtual EFeatureType get_feature_type()
        {
            return F_UNKNOWN;
        }

        inline virtual EFeatureClass get_feature_class()
        {
            return C_COMBINED;
        }

        inline virtual int32_t get_num_vectors() const
        {
            return num_vec;
        }

        virtual int32_t get_size()
        {
            CFeatures* f=(CFeatures*) feature_list
                ->get_current_element();
            if (f)
            {
                int32_t s=f->get_size();
                SG_UNREF(f)
                return s;
            }
            else 
                return 0;
        }

        void list_feature_objs();

        bool check_feature_obj_compatibility(CCombinedFeatures* comb_feat);

        inline CFeatures* get_first_feature_obj()
        {
            return (CFeatures*) feature_list->get_first_element();
        }

        inline CFeatures* get_first_feature_obj(CListElement*& current)
        {
            return (CFeatures*) feature_list->get_first_element(current);
        }

        inline CFeatures* get_next_feature_obj()
        {
            return (CFeatures*) feature_list->get_next_element();
        }

        inline CFeatures* get_next_feature_obj(CListElement*& current)
        {
            return (CFeatures*) feature_list->get_next_element(current);
        }

        inline CFeatures* get_last_feature_obj()
        {
            return (CFeatures*) feature_list->get_last_element();
        }

        inline bool insert_feature_obj(CFeatures* obj)
        {
            ASSERT(obj);
            int32_t n=obj->get_num_vectors();

            if (num_vec>0 && n!=num_vec)
                SG_ERROR("Number of feature vectors does not match (expected %d, obj has %d)\n", num_vec, n);

            num_vec=n;
            return feature_list->insert_element(obj);
        }

        inline bool append_feature_obj(CFeatures* obj)
        {
            ASSERT(obj);
            int32_t n=obj->get_num_vectors();

            if (num_vec>0 && n!=num_vec)
                SG_ERROR("Number of feature vectors does not match (expected %d, obj has %d)\n", num_vec, n);

            num_vec=n;
            return feature_list->append_element(obj);
        }

        inline bool delete_feature_obj()
        {
            CFeatures* f=(CFeatures*)feature_list->delete_element();
            if (f)
            {
                SG_UNREF(f);
                return true;
            }
            else
                return false;
        }

        inline int32_t get_num_feature_obj()
        {
            return feature_list->get_num_elements();
        }

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

    protected:
        CList* feature_list;

        int32_t num_vec;
};
}
#endif