TrajectoryStateClosestToBeamLine.h

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#ifndef TrajectoryStateClosestToBeamLine_H
#define TrajectoryStateClosestToBeamLine_H

#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"

class TrajectoryStateClosestToBeamLine {
public:
  typedef FreeTrajectoryState FTS;

  TrajectoryStateClosestToBeamLine() : valid(false) {}

  TrajectoryStateClosestToBeamLine(const FTS& stateAtPCA,
                                   const GlobalPoint& pointOnBeamLine,
                                   const reco::BeamSpot& beamSpot)
      : theFTS(stateAtPCA), thePointOnBeamLine(pointOnBeamLine), theBeamSpot(beamSpot), valid(true) {}

  ~TrajectoryStateClosestToBeamLine() {}

  FTS const& trackStateAtPCA() const { return theFTS; }

  GlobalPoint const& beamLinePCA() const { return thePointOnBeamLine; }

  Measurement1D transverseImpactParameter() const;

  reco::BeamSpot const& beamSpot() { return theBeamSpot; }

  inline bool isValid() const { return valid; }

private:
  FTS theFTS;
  GlobalPoint thePointOnBeamLine;
  reco::BeamSpot theBeamSpot;
  bool valid;
};
#endif