RootParticleWriter.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2017-2018 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/SimParticle.hpp"
#include "ActsExamples/Framework/ProcessCode.hpp"
#include "ActsExamples/Framework/WriterT.hpp"

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

class TFile;
class TTree;

namespace ActsExamples {
struct AlgorithmContext;

class RootParticleWriter final : public WriterT<SimParticleContainer> {
 public:
  struct Config {
    std::string inputParticles;
    std::string filePath;
    std::string fileMode = "RECREATE";
    std::string treeName = "particles";
  };

  RootParticleWriter(const Config& cfg, Acts::Logging::Level lvl);

  ~RootParticleWriter() override;

  ProcessCode finalize() override;

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

 protected:
  ProcessCode writeT(const AlgorithmContext& ctx,
                     const SimParticleContainer& particles) override;

 private:
  Config m_cfg;
  std::mutex m_writeMutex;
  TFile* m_outputFile = nullptr;
  TTree* m_outputTree = nullptr;
  uint32_t m_eventId = 0;
  std::vector<uint64_t> m_particleId;
  std::vector<int32_t> m_particleType;
  std::vector<uint32_t> m_process;
  std::vector<float> m_vx;
  std::vector<float> m_vy;
  std::vector<float> m_vz;
  // Production time in ns.
  std::vector<float> m_vt;
  std::vector<float> m_p;
  std::vector<float> m_px;
  std::vector<float> m_py;
  std::vector<float> m_pz;
  std::vector<float> m_m;
  std::vector<float> m_q;
  // Derived kinematic quantities
  std::vector<float> m_eta;
  std::vector<float> m_phi;
  std::vector<float> m_pt;
  // Decoded particle identifier; see Barcode definition for details.
  std::vector<uint32_t> m_vertexPrimary;
  std::vector<uint32_t> m_vertexSecondary;
  std::vector<uint32_t> m_particle;
  std::vector<uint32_t> m_generation;
  std::vector<uint32_t> m_subParticle;
};

}  // namespace ActsExamples