StreamingSimpleFeatures.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 Shashwat Lal Das
 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
 */
#ifndef _STREAMING_SIMPLEFEATURES__H__
#define _STREAMING_SIMPLEFEATURES__H__

#include <shogun/lib/common.h>
#include <shogun/features/StreamingDotFeatures.h>
#include <shogun/features/SimpleFeatures.h>
#include <shogun/lib/DataType.h>
#include <shogun/io/InputParser.h>

namespace shogun
{
template <class T> class CStreamingSimpleFeatures : public CStreamingDotFeatures
{
public:

    CStreamingSimpleFeatures();

    CStreamingSimpleFeatures(CStreamingFile* file,
                 bool is_labelled, int32_t size);

    CStreamingSimpleFeatures(CSimpleFeatures<T>* simple_features,
                 float64_t* lab=NULL);

    ~CStreamingSimpleFeatures();

    virtual void set_vector_reader();

    virtual void set_vector_and_label_reader();

    virtual void start_parser();

    virtual void end_parser();

    virtual void reset_stream();

    virtual bool get_next_example();

    SGVector<T> get_vector();

    virtual float64_t get_label();

    virtual void release_example();

    virtual int32_t get_dim_feature_space() const;

    virtual float32_t dot(SGVector<T> vec);

    virtual float32_t dot(CStreamingDotFeatures *df);

    virtual float32_t dense_dot(const float32_t* vec2, int32_t vec2_len);

    virtual float64_t dense_dot(const float64_t* vec2, int32_t vec2_len);

    virtual void add_to_dense_vec(float32_t alpha, float32_t* vec2, int32_t vec2_len , bool abs_val=false);

    virtual void add_to_dense_vec(float64_t alpha, float64_t* vec2, int32_t vec2_len , bool abs_val=false);

    virtual inline int32_t get_nnz_features_for_vector();

    int32_t get_num_features();

    virtual inline EFeatureType get_feature_type();

    virtual EFeatureClass get_feature_class();

    virtual CFeatures* duplicate() const;

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

    inline virtual int32_t get_num_vectors() const;

    virtual int32_t get_size();

private:
    void init();

    void init(CStreamingFile *file, bool is_labelled, int32_t size);

protected:

    float32_t combined_weight;

    CInputParser<T> parser;

    SGVector<T> current_sgvector;

    T* current_vector;

    float64_t current_label;

    int32_t current_length;
};
}
#endif // _STREAMING_SIMPLEFEATURES__H__