00001 /* 00002 * This program is free software; you can redistribute it and/or modify 00003 * it under the terms of the GNU General Public License as published by 00004 * the Free Software Foundation; either version 3 of the License, or 00005 * (at your option) any later version. 00006 * 00007 * Written (W) 2009 Soeren Sonnenburg 00008 * Copyright (C) 2009 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #ifndef _COMBINEDDOTFEATURES_H___ 00012 #define _COMBINEDDOTFEATURES_H___ 00013 00014 #include "lib/common.h" 00015 #include "lib/List.h" 00016 #include "features/DotFeatures.h" 00017 #include "features/Features.h" 00018 00019 namespace shogun 00020 { 00021 class CFeatures; 00022 template <class T> class CList; 00023 template <class T> class CListElement; 00043 class CCombinedDotFeatures : public CDotFeatures 00044 { 00045 public: 00047 CCombinedDotFeatures(); 00048 00050 CCombinedDotFeatures(const CCombinedDotFeatures & orig); 00051 00053 virtual ~CCombinedDotFeatures(); 00054 00055 inline virtual int32_t get_num_vectors() 00056 { 00057 return num_vectors; 00058 } 00059 00064 inline virtual int32_t get_dim_feature_space() 00065 { 00066 return num_dimensions; 00067 } 00068 00075 virtual float64_t dot(int32_t vec_idx1, int32_t vec_idx2); 00076 00083 virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len); 00084 00093 virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1, float64_t* vec2, int32_t vec2_len, bool abs_val=false); 00094 00100 virtual int32_t get_nnz_features_for_vector(int32_t num); 00101 00106 inline virtual EFeatureType get_feature_type() 00107 { 00108 return F_DREAL; 00109 } 00110 00115 inline virtual EFeatureClass get_feature_class() 00116 { 00117 return C_COMBINED_DOT; 00118 } 00119 00120 inline virtual int32_t get_size() 00121 { 00122 return sizeof(float64_t); 00123 } 00124 00129 virtual CFeatures* duplicate() const; 00130 00132 void list_feature_objs(); 00133 00138 inline CDotFeatures* get_first_feature_obj() 00139 { 00140 CDotFeatures* f=feature_list->get_first_element(); 00141 SG_REF(f); 00142 return f; 00143 } 00144 00150 inline CDotFeatures* get_first_feature_obj(CListElement<CDotFeatures*>*¤t) 00151 { 00152 CDotFeatures* f=feature_list->get_first_element(current); 00153 SG_REF(f); 00154 return f; 00155 } 00156 00161 inline CDotFeatures* get_next_feature_obj() 00162 { 00163 CDotFeatures* f=feature_list->get_next_element(); 00164 SG_REF(f); 00165 return f; 00166 } 00167 00173 inline CDotFeatures* get_next_feature_obj(CListElement<CDotFeatures*>*¤t) 00174 { 00175 CDotFeatures* f=feature_list->get_next_element(current); 00176 SG_REF(f); 00177 return f; 00178 } 00179 00184 inline CDotFeatures* get_last_feature_obj() 00185 { 00186 CDotFeatures* f=feature_list->get_last_element(); 00187 SG_REF(f); 00188 return f; 00189 } 00190 00196 inline bool insert_feature_obj(CDotFeatures* obj) 00197 { 00198 ASSERT(obj); 00199 SG_REF(obj); 00200 bool result=feature_list->insert_element(obj); 00201 update_dim_feature_space_and_num_vec(); 00202 return result; 00203 } 00204 00210 inline bool append_feature_obj(CDotFeatures* obj) 00211 { 00212 ASSERT(obj); 00213 SG_REF(obj); 00214 bool result=feature_list->append_element(obj); 00215 update_dim_feature_space_and_num_vec(); 00216 return result; 00217 } 00218 00223 inline bool delete_feature_obj() 00224 { 00225 CDotFeatures* f=feature_list->delete_element(); 00226 if (f) 00227 { 00228 SG_UNREF(f); 00229 update_dim_feature_space_and_num_vec(); 00230 return true; 00231 } 00232 else 00233 return false; 00234 } 00235 00240 inline int32_t get_num_feature_obj() 00241 { 00242 return feature_list->get_num_elements(); 00243 } 00244 00250 virtual void get_subfeature_weights(float64_t** weights, int32_t* num_weights); 00251 00257 virtual void set_subfeature_weights( 00258 float64_t* weights, int32_t num_weights); 00259 00261 inline virtual const char* get_name() const { return "CombinedDotFeatures"; } 00262 00263 protected: 00265 void update_dim_feature_space_and_num_vec(); 00266 00267 protected: 00269 CList<CDotFeatures*>* feature_list; 00270 00272 int32_t num_vectors; 00274 int32_t num_dimensions; 00275 }; 00276 } 00277 #endif // _DOTFEATURES_H___