JEventSourcePODIO.h

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// Copyright 2022, David Lawrence
// Subject to the terms in the LICENSE file found in the top-level directory.
//
 
#pragma once
 
#include <JANA/JApplicationFwd.h>
#include <JANA/JEventSource.h>
#include <JANA/JEventSourceGeneratorT.h>
#include <podio/Frame.h>
#include <podio/Reader.h>
#include <spdlog/logger.h>
#include <cstddef>
#include <memory>
#include <string>
#include <string_view>
#include <vector>
 
class JEventSourcePODIO : public JEventSource {
 
public:
  JEventSourcePODIO(std::string resource_name, JApplication* app);
 
  virtual ~JEventSourcePODIO();
 
  void Open() override;
 
  void Close() override;
 
  Result Emit(JEvent& event) override;
 
  static std::string GetDescription();
 
  void PrintCollectionTypeTable(void);
 
  std::vector<std::string_view> getAvailableCategories() const;
  std::size_t getEntries(const std::string& category) const;
  podio::Frame getFrame(const std::string& category, std::size_t index) const;
 
protected:
  std::unique_ptr<podio::Reader> m_reader;
 
  std::size_t Nevents_in_file = 0;
  std::size_t Nevents_read    = 0;
 
  bool m_run_forever       = false;
  bool m_use_event_headers = true;
 
  std::shared_ptr<spdlog::logger> m_log;
};
 
template <> double JEventSourceGeneratorT<JEventSourcePODIO>::CheckOpenable(std::string);