DetailedTrackTruthBuilder.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
// Dear emacs, this is -*-c++-*-
 
#ifndef DETAILEDTRACKTRUTHBUILDER_H
#define DETAILEDTRACKTRUTHBUILDER_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ToolHandle.h"
 
#include "AthLinks/ElementLink.h"
#include "AtlasDetDescr/AtlasDetectorID.h"
#include "TrkTruthData/PRD_MultiTruthCollection.h"
#include "TrkEventUtils/InverseMultiMap.h"
 
#include "TrkToolInterfaces/IDetailedTrackTruthBuilder.h"
#include "TrkToolInterfaces/ITruthTrajectoryBuilder.h"
#include "TrkTruthData/DetailedTrackTruth.h"
#include "TrkTruthData/SubDetHitStatistics.h"
 
namespace Trk {
 
  class DetailedTrackTruthBuilder final: virtual public extends<AthAlgTool, IDetailedTrackTruthBuilder>
  {
  public:
    using base_class::base_class;
 
    virtual StatusCode initialize() override;

    virtual void buildDetailedTrackTruth(DetailedTrackTruthCollection *output,
                                         const TrackCollection& tracks,
                                         const std::vector<const PRD_MultiTruthCollection*>& prdTruth,
                                         const EventContext& ctx) const override;
 
  private:
    typedef InverseMultiMap<PRD_MultiTruthCollection> PRD_InverseTruth;
 
    const AtlasDetectorID *m_idHelper{};
 
    PublicToolHandle<Trk::ITruthTrajectoryBuilder> m_truthTrajBuilder{this, "TruthTrajectoryTool", "Trk::ElasticTruthTrajectoryBuilder"};
 
    SubDetHitStatistics::SubDetType findSubDetType(const Identifier& id) const;
 
    void addTrack(DetailedTrackTruthCollection *output,
                  const ElementLink<DataVector<Trk::Track> > &track,
                  const std::vector<const PRD_MultiTruthCollection*>& orderedPRD_Truth,
                  const PRD_InverseTruth& inverseTruth,
                  const EventContext& ctx) const;
 
    void makeTruthToRecMap( PRD_InverseTruth& result, const PRD_MultiTruthCollection& rec2truth) const;
 
    SubDetHitStatistics countPRDsOnTruth(const TruthTrajectory& traj,
                                         const PRD_InverseTruth& inverseTruth) const;
 
  };
 
} // end namespace Trk
 
#endif/*DETAILEDTRACKTRUTHBUILDER_H*/