BestMatchedTruthVarSet.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <tracking/trackingUtilities/varsets/VarSet.h>
#include <tracking/trackingUtilities/varsets/VarNames.h>
 
#include <framework/dataobjects/EventMetaData.h>
#include <framework/datastore/StoreObjPtr.h>
 
namespace Belle2 {
  namespace TrackingUtilities {
    class CDCTrack;
  }
  namespace TrackFindingCDC {

    constexpr static char const* const bestMatchedTruthVarNames[] = {
      // Truth: PR Track is not a fake and the best matched track (not a clone)
      "truth",
      // Other truth variables are mostly to be helpful during debugging.
      "truth_track_is_fake",
      "truth_track_is_matched",
      "truth_matched_hits",
      "truth_track_is_clone",
      "truth_first_nloops",
      "truth_event_id",
      "truth_MCTrackID",
    };

    struct BestMatchedTruthVarNames : public TrackingUtilities::VarNames<TrackingUtilities::CDCTrack> {

      // we shouldn't use public member variables but we do want to rewrite all related code using setters/getters
      // at least tell cppcheck that everything is fine
      // cppcheck-suppress duplInheritedMember
      static const size_t nVars = TrackingUtilities::size(bestMatchedTruthVarNames);

      // cppcheck-suppress duplInheritedMember ; intentionally hides the base class member, which is the empty default of VarNames
      static constexpr char const* getName(int iName)
      {
        return bestMatchedTruthVarNames[iName];
      }
    };

    class BestMatchedTruthVarSet : public TrackingUtilities::VarSet<BestMatchedTruthVarNames> {
 
    public:
      void initialize() final;

      void beginEvent() final;

      bool extract(const TrackingUtilities::CDCTrack* ptrCDCTrack) override;
 
    private:
      using Super = TrackingUtilities::VarSet<BestMatchedTruthVarNames>;

      StoreObjPtr<EventMetaData> m_eventMetaData;
    };
  }
}