StreamingFeatures.h

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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) 2011 Shashwat Lal Das
00008  * Written (W) 2012 Heiko Strathmann
00009  * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
00010  */
00011 #ifndef _STREAMING_FEATURES__H__
00012 #define _STREAMING_FEATURES__H__
00013 
00014 #include <shogun/lib/common.h>
00015 #include <shogun/features/Features.h>
00016 #include <shogun/io/streaming/StreamingFile.h>
00017 
00018 namespace shogun
00019 {
00070 class CStreamingFeatures : public CFeatures
00071 {
00072 
00073 public:
00074 
00079     CStreamingFeatures();
00080 
00084     virtual ~CStreamingFeatures();
00085 
00092     void set_read_functions();
00093 
00102     virtual void set_vector_reader()=0;
00103 
00113     virtual void set_vector_and_label_reader()=0;
00114 
00119     virtual void start_parser()=0;
00120 
00124     virtual void end_parser()=0;
00125 
00133     virtual float64_t get_label()=0;
00134 
00140     virtual bool get_next_example()=0;
00141 
00147     virtual void release_example()=0;
00148 
00154     virtual int32_t get_num_features()=0;
00155 
00161     virtual bool get_has_labels();
00162 
00173     virtual bool is_seekable();
00174 
00178     virtual void reset_stream();
00179 
00188     virtual CFeatures* get_streamed_features(index_t num_elements)
00189     {
00190         SG_ERROR("%s::get_streamed_features() is not yet implemented!\n",
00191                 get_name());
00192         return NULL;
00193     }
00194 
00195 protected:
00196 
00198     bool has_labels;
00199 
00201     CStreamingFile* working_file;
00202 
00204     bool seekable;
00205 
00206 };
00207 }
00208 #endif // _STREAMING_FEATURES__H__
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