alcor_data_streamer.h

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#pragma once
 
#include <string>
#include "TFile.h"
#include "TTree.h"
#include "alcor_data.h"
 
class alcor_data_streamer
{
public:
    // -------------------------------------------------------------------------
 
 
    explicit alcor_data_streamer(const std::string &fname);
 
    alcor_data_streamer(alcor_data_streamer &&other) noexcept;
 
    alcor_data_streamer &operator=(alcor_data_streamer &&other) noexcept;
 
    alcor_data_streamer(const alcor_data_streamer &) = delete;
    alcor_data_streamer &operator=(const alcor_data_streamer &) = delete;
 
    ~alcor_data_streamer() noexcept;
 
 
    // -------------------------------------------------------------------------
 
 
    bool is_valid() const noexcept;
 
    bool eof() const noexcept;
 
 
    // -------------------------------------------------------------------------
 
 
    std::string get_filename() const noexcept;
 
    const alcor_data &current() const noexcept;
 
    alcor_data &current() noexcept;
 
    Long64_t entry() const noexcept;
 
    Long64_t entries() const noexcept;
 
 
    // -------------------------------------------------------------------------
 
 
    bool read_next() noexcept;
 
    void rewind() noexcept;
 
 
private:
    // -------------------------------------------------------------------------
 
 
    std::string filename;   
    TFile *file = nullptr;  
    TTree *tree = nullptr;  
    alcor_data data;        
    Long64_t n_entries = 0; 
    Long64_t cursor = 0;    
    bool valid = false;     
 
};