HepMCProcessExtractor.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2020 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/Definitions/Algebra.hpp"
#include "Acts/Definitions/Units.hpp"
#include "Acts/Utilities/Logger.hpp"
#include "ActsExamples/EventData/ExtractedSimulationProcess.hpp"
#include "ActsExamples/EventData/SimParticle.hpp"
#include "ActsExamples/Framework/DataHandle.hpp"
#include "ActsExamples/Framework/IAlgorithm.hpp"
#include "ActsExamples/Framework/ProcessCode.hpp"

#include <memory>
#include <string>
#include <vector>

#include <HepMC3/GenEvent.h>

class G4RunManager;

namespace ActsExamples {

class HepMCProcessExtractor final : public ActsExamples::IAlgorithm {
 public:
  struct Config {
    std::string inputEvents;
    std::string outputSimulationProcesses = "event-fraction";
    std::string extractionProcess;

    int absPdgMin = 40;
    int absPdgMax = 2212;
    double pMin = 50. * Acts::UnitConstants::MeV;
  };

  HepMCProcessExtractor(Config config, Acts::Logging::Level level);
  ~HepMCProcessExtractor() override;

  ActsExamples::ProcessCode execute(
      const AlgorithmContext& context) const override;

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

 private:
  Config m_cfg;

  ReadDataHandle<std::vector<HepMC3::GenEvent>> m_inputEvents{this,
                                                              "InputEvents"};
  WriteDataHandle<ActsExamples::ExtractedSimulationProcessContainer>
      m_outputSimulationProcesses{this, "OutputSimulationProcesses"};
};

}  // namespace ActsExamples