PseudoOracularExtractor.hpp

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#ifndef TATAMI_PSEUDO_ORACULAR_EXTRACTOR_HPP
#define TATAMI_PSEUDO_ORACULAR_EXTRACTOR_HPP
 
#include "../base/Matrix.hpp"
#include "../base/Extractor.hpp"
 
namespace tatami {
 
template<typename Value_, typename Index_> 
struct PseudoOracularDenseExtractor : public OracularDenseExtractor<Value_, Index_> {
    PseudoOracularDenseExtractor(std::shared_ptr<const Oracle<Index_> > oracle, std::unique_ptr<MyopicDenseExtractor<Value_, Index_> > ext) :
        my_oracle(std::move(oracle)), my_ext(std::move(ext)) {}
 
    const Value_* fetch(Index_, Value_* buffer) {
        auto i = my_oracle->get(my_used++);
        return my_ext->fetch(i, buffer);
    }
 
private:
    std::shared_ptr<const Oracle<Index_> > my_oracle;
    std::unique_ptr<MyopicDenseExtractor<Value_, Index_> > my_ext;
    size_t my_used = 0;
};
 
template<typename Value_, typename Index_> 
struct PseudoOracularSparseExtractor : public OracularSparseExtractor<Value_, Index_> {
    PseudoOracularSparseExtractor(std::shared_ptr<const Oracle<Index_> > oracle, std::unique_ptr<MyopicSparseExtractor<Value_, Index_> > ext) :
        my_oracle(std::move(oracle)), my_ext(std::move(ext)) {}
 
    SparseRange<Value_, Index_> fetch(Index_, Value_* value_buffer, Index_* index_buffer) {
        auto i = my_oracle->get(my_used++);
        return my_ext->fetch(i, value_buffer, index_buffer);
    }
 
private:
    std::shared_ptr<const Oracle<Index_> > my_oracle;
    std::unique_ptr<MyopicSparseExtractor<Value_, Index_> > my_ext;
    size_t my_used = 0;
};
 
}
 
#endif