EDM4hepParticleReader.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2022 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/SimParticle.hpp"
#include "ActsExamples/Framework/DataHandle.hpp"
#include "ActsExamples/Framework/IReader.hpp"

#include <memory>
#include <string>

#include <edm4hep/MCParticleCollection.h>
#include <podio/ROOTFrameReader.h>

namespace ActsExamples {

class EDM4hepParticleReader final : public IReader {
 public:
  struct Config {
    std::string inputPath;
    std::string inputParticles = "MCParticles";
    std::string outputParticles;
  };

  EDM4hepParticleReader(const Config& config, Acts::Logging::Level level);

  std::string name() const final;

  std::pair<size_t, size_t> availableEvents() const final;

  ProcessCode read(const ActsExamples::AlgorithmContext& ctx) final;

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

 private:
  Config m_cfg;
  std::pair<size_t, size_t> m_eventsRange;
  std::unique_ptr<const Acts::Logger> m_logger;

  podio::ROOTFrameReader m_reader;

  WriteDataHandle<SimParticleContainer> m_outputParticles{this,
                                                          "OutputParticles"};
};

}  // namespace ActsExamples