RootSimHitWriter.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2018 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/SimHit.hpp"
#include "ActsExamples/Framework/ProcessCode.hpp"
#include "ActsExamples/Framework/WriterT.hpp"

#include <cstdint>
#include <mutex>
#include <string>

class TFile;
class TTree;

namespace ActsExamples {
struct AlgorithmContext;

class RootSimHitWriter final : public WriterT<SimHitContainer> {
 public:
  struct Config {
    std::string inputSimHits;
    std::string filePath;
    std::string fileMode = "RECREATE";
    std::string treeName = "hits";
  };

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

  ~RootSimHitWriter() override;

  ProcessCode finalize() override;

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

 protected:
  ProcessCode writeT(const AlgorithmContext& ctx,
                     const SimHitContainer& hits) override;

 private:
  Config m_cfg;
  std::mutex m_writeMutex;
  TFile* m_outputFile = nullptr;
  TTree* m_outputTree = nullptr;
  uint32_t m_eventId = 0;
  uint64_t m_geometryId = 0;
  uint64_t m_particleId = 0;
  float m_tx = 0, m_ty = 0, m_tz = 0;
  // True global hit time in ns.
  float m_tt = 0;
  float m_tpx = 0, m_tpy = 0, m_tpz = 0, m_te = 0;
  float m_deltapx = 0, m_deltapy = 0, m_deltapz = 0, m_deltae = 0;
  int32_t m_index = 0;
  // Decoded hit surface identifier components.
  uint32_t m_volumeId = 0;
  uint32_t m_boundaryId = 0;
  uint32_t m_layerId = 0;
  uint32_t m_approachId = 0;
  uint32_t m_sensitiveId = 0;
};

}  // namespace ActsExamples