RootNuclearInteractionParametersWriter.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2020-2021 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Utilities/Logger.hpp"
#include "ActsExamples/EventData/ExtractedSimulationProcess.hpp"
#include "ActsExamples/Framework/ProcessCode.hpp"
#include "ActsExamples/Framework/WriterT.hpp"
#include "ActsExamples/Io/NuclearInteractions/detail/NuclearInteractionParametrisation.hpp"

#include <mutex>
#include <string>
#include <vector>

namespace ActsExamples {
struct AlgorithmContext;

class RootNuclearInteractionParametersWriter final
    : public WriterT<ExtractedSimulationProcessContainer> {
 public:
  struct Config {
    std::string inputSimulationProcesses;
    std::string filePath = "parameters.root";
    std::string fileMode = "RECREATE";

    unsigned int interactionProbabilityBins = 1e6;
    unsigned int momentumBins = 1e6;
    unsigned int invariantMassBins = 1e6;
    unsigned int multiplicityMax = 10;
    bool writeOptionalHistograms = true;
    unsigned int nSimulatedEvents = 0;
  };

  RootNuclearInteractionParametersWriter(const Config& config,
                                         Acts::Logging::Level level);
  ~RootNuclearInteractionParametersWriter() override;

  ProcessCode finalize() override;

  const Config& config() const { return m_cfg; }

 protected:
  ProcessCode writeT(const AlgorithmContext& /*ctx*/,
                     const ExtractedSimulationProcessContainer& event) override;

 private:
  Config m_cfg;             
  std::mutex m_writeMutex;  
  std::vector<detail::NuclearInteractionParametrisation::EventFraction>
      m_eventFractionCollection;  
};
}  // namespace ActsExamples