RPC_ResidualPullCalculator.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef MUONRPC_RESIDUALPULLCALCULATOR_H
#define MUONRPC_RESIDUALPULLCALCULATOR_H
 
#include "TrkToolInterfaces/IResidualPullCalculator.h"
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ServiceHandle.h"
 
#include "MuonIdHelpers/IMuonIdHelperSvc.h"
#include "TrkParameters/TrackParameters.h"
#include "TrkEventPrimitives/ResidualPull.h"
 
namespace Muon
{

 
  class RPC_ResidualPullCalculator :  public extends<AthAlgTool, Trk::IResidualPullCalculator>
    {
    public:
      using base_class::base_class;
      virtual ~RPC_ResidualPullCalculator()=default;
 
      virtual StatusCode initialize() override;
 
      using IResidualPullCalculator::residualPull;
    virtual std::optional<Trk::ResidualPull> residualPull(
        const Trk::MeasurementBase* measurement,
        const Trk::TrackParameters* trkPar,
        const Trk::ResidualPull::ResidualType,
        const Trk::TrackState::MeasurementType) const override;

    virtual std::array<double,5> residuals(
        const Trk::MeasurementBase* measurement,
        const Trk::TrackParameters* trkPar,
        const Trk::ResidualPull::ResidualType,
        const Trk::TrackState::MeasurementType) const override;
 
    private:
 
    ServiceHandle<Muon::IMuonIdHelperSvc> m_idHelperSvc {this, "MuonIdHelperSvc", "Muon::MuonIdHelperSvc/MuonIdHelperSvc"};

      static double calcPull(const double residual,
                      const double locMesCov,
                      const double locTrkCov,
                      const Trk::ResidualPull::ResidualType& ) ;
 
    };
} // end of namespace
 
#endif