RootTrackParameterWriter.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 "ActsExamples/Framework/WriterT.hpp"
#include <Acts/EventData/TrackParameters.hpp>

#include <mutex>

class TFile;
class TTree;

namespace ActsExamples {

using BoundTrackParameters = Acts::BoundTrackParameters;
using TrackParameterWriter = WriterT<std::vector<BoundTrackParameters>>;


class RootTrackParameterWriter final : public TrackParameterWriter {
 public:
  struct Config {
    std::string collection;             
    std::string filePath;               
    std::string fileMode = "RECREATE";  
    std::string treeName = "trackparameters";  
    TFile* rootFile = nullptr;                 
  };

  RootTrackParameterWriter(const Config& cfg,
                           Acts::Logging::Level level = Acts::Logging::INFO);

  ~RootTrackParameterWriter() override;

  ProcessCode endRun() final override;

 protected:
  ProcessCode writeT(
      const AlgorithmContext& ctx,
      const std::vector<BoundTrackParameters>& trackParams) final override;

 private:
  Config m_cfg;             
  std::mutex m_writeMutex;  
  TFile* m_outputFile{nullptr};  
  TTree* m_outputTree{nullptr};  
  int m_eventNr{0};              
  float m_d0{0.};                
  float m_z0{0.};                
  float m_phi{0.};               
  float m_theta{0.};             
  float m_qp{0.};                
};

}  // namespace ActsExamples