/data/refman/pasoursint/CMSSW_5_2_9/src/RecoTracker/TransientTrackingRecHit/interface/TSiPixelRecHit.h

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#ifndef RECOTRACKER_TRANSIENTRACKINGRECHIT_TSiPixelRecHit_H
#define RECOTRACKER_TRANSIENTRACKINGRECHIT_TSiPixelRecHit_H

#include "DataFormats/TrackerRecHit2D/interface/SiPixelRecHit.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "RecoLocalTracker/ClusterParameterEstimator/interface/PixelClusterParameterEstimator.h"
#include "TrackingTools/TransientTrackingRecHit/interface/HelpertRecHit2DLocalPos.h"
#include "Geometry/CommonDetUnit/interface/GeomDetUnit.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

// class GeomDetUnit;

class TSiPixelRecHit : public TransientTrackingRecHit {
public:

  typedef SiPixelRecHit::ClusterRef clusterRef;


  virtual ~TSiPixelRecHit() {}

  virtual AlgebraicVector parameters() const {return theHitData.parameters();}

  virtual AlgebraicSymMatrix parametersError() const {
    return HelpertRecHit2DLocalPos().parError( theHitData.localPositionError(), *det()); 
    // return theHitData->parametersError();
  }

  virtual AlgebraicMatrix projectionMatrix() const {return theHitData.projectionMatrix();}
  virtual int dimension() const {return theHitData.dimension();}

  virtual LocalPoint localPosition() const {return theHitData.localPosition();}
  virtual LocalError localPositionError() const {return theHitData.localPositionError();}

  virtual void getKfComponents( KfComponentsHolder & holder ) const {
      HelpertRecHit2DLocalPos().getKfComponents(holder, theHitData, *det()); 
  }

  virtual const TrackingRecHit * hit() const {return &theHitData;};
  
  virtual std::vector<const TrackingRecHit*> recHits() const {
    return hit()->recHits();
  }
  virtual std::vector<TrackingRecHit*> recHits() {
    return theHitData.recHits();
  }

  virtual bool canImproveWithTrack() const {return true;}

  //RC  virtual TSiPixelRecHit* clone (const TrajectoryStateOnSurface& ts) const;
  virtual RecHitPointer clone (const TrajectoryStateOnSurface& ts) const;

  virtual const GeomDetUnit* detUnit() const;

  // Extension of the TransientTrackingRecHit interface

  const SiPixelRecHit* specificHit() const {return &theHitData;};
  const PixelClusterParameterEstimator* cpe() const {return theCPE;}

  static RecHitPointer build( const GeomDet * geom, const SiPixelRecHit* rh, 
                              const PixelClusterParameterEstimator* cpe,
                              bool computeCoarseLocalPosition=false) {
    return RecHitPointer( new TSiPixelRecHit( geom, rh, cpe, computeCoarseLocalPosition));
  }

  static RecHitPointer build( const LocalPoint& pos, const LocalError& err,
                              const GeomDet* det, 
                              const clusterRef & cluster,
                              const PixelClusterParameterEstimator* cpe) {
    return RecHitPointer( new TSiPixelRecHit( pos, err, det, cluster, cpe));
  }


  virtual float clusterProbability() const {
    return theHitData.clusterProbability( theClusterProbComputationFlag );
  }



private:
  const PixelClusterParameterEstimator* theCPE;
  SiPixelRecHit                         theHitData;
  unsigned int                          theClusterProbComputationFlag;


  TSiPixelRecHit(const GeomDet * geom, const SiPixelRecHit* rh, 
                 const PixelClusterParameterEstimator* cpe,
                 bool computeCoarseLocalPosition);



  TSiPixelRecHit( const LocalPoint& pos, const LocalError& err,
                  const GeomDet* det, 
                  const clusterRef & clust,
                  const PixelClusterParameterEstimator* cpe);


  virtual TSiPixelRecHit * clone() const {
    return new TSiPixelRecHit(*this);
  }

};



#endif