/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/RecoTracker/TransientTrackingRecHit/interface/TSiStripRecHit2DLocalPos.h

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#ifndef RECOTRACKER_TRANSIENTRACKINGRECHIT_TSiStripRecHit2DLocalPos_H
#define RECOTRACKER_TRANSIENTRACKINGRECHIT_TSiStripRecHit2DLocalPos_H

#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit2D.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TValidTrackingRecHit.h"
#include "RecoLocalTracker/ClusterParameterEstimator/interface/StripClusterParameterEstimator.h"
#include "TrackingTools/TransientTrackingRecHit/interface/HelpertRecHit2DLocalPos.h"
#include "DataFormats/Common/interface/RefGetter.h"
#include "Geometry/CommonDetUnit/interface/GeomDetUnit.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

class TSiStripRecHit2DLocalPos GCC11_FINAL : public TValidTrackingRecHit {
public:
  
  typedef SiStripRecHit2D::ClusterRef SiStripClusterRef;
  
  typedef edm::LazyGetter<SiStripCluster>::value_ref  SiStripRegionalClusterRef;
  
  virtual ~TSiStripRecHit2DLocalPos() {}
  
  
  virtual void getKfComponents( KfComponentsHolder & holder ) const {
    HelpertRecHit2DLocalPos().getKfComponents(holder, theHitData, *det()); 
  }
  
  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 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 const GeomDetUnit* detUnit() const;
  
  virtual bool canImproveWithTrack() const {return true;}
  
  //RC virtual TSiStripRecHit2DLocalPos* clone(const TrajectoryStateOnSurface& ts) const;
  virtual RecHitPointer clone(const TrajectoryStateOnSurface& ts) const;
  
  // Extension of the TransientTrackingRecHit interface
  
  const SiStripRecHit2D* specificHit() const {return &theHitData;};
  const StripClusterParameterEstimator* cpe() const {return theCPE;}
  
  static RecHitPointer build( const GeomDet * geom, const SiStripRecHit2D* rh,
                              const StripClusterParameterEstimator* cpe,
                              bool computeCoarseLocalPosition=false) {
    return RecHitPointer( new TSiStripRecHit2DLocalPos( geom, rh, cpe,computeCoarseLocalPosition));
  }
  
  
  static RecHitPointer build( const LocalPoint& pos, const LocalError& err,
                              const GeomDet* det,
                              const OmniClusterRef & clust,
                              const StripClusterParameterEstimator* cpe) {
    return RecHitPointer( new TSiStripRecHit2DLocalPos( pos, err, det, clust, cpe));
  }

  static RecHitPointer build( const LocalPoint& pos, const LocalError& err,
                              const GeomDet* det,
                              const SiStripClusterRef & clust,
                              const StripClusterParameterEstimator* cpe) {
    return RecHitPointer( new TSiStripRecHit2DLocalPos( pos, err, det, OmniClusterRef(clust), cpe));
  }
  
  static RecHitPointer build( const LocalPoint& pos, const LocalError& err,
                              const GeomDet* det,
                              const SiStripRegionalClusterRef & clust,
                              const StripClusterParameterEstimator* cpe) {
    return RecHitPointer( new TSiStripRecHit2DLocalPos( pos, err, det, OmniClusterRef(clust), cpe));
  }
  
  
  
private:
  
  const StripClusterParameterEstimator* theCPE;
  SiStripRecHit2D              theHitData;
 

 
  TSiStripRecHit2DLocalPos (const GeomDet * geom, const SiStripRecHit2D* rh,
                            const StripClusterParameterEstimator* cpe,
                            bool computeCoarseLocalPosition) : 
    TValidTrackingRecHit(geom), theCPE(cpe) 
  {
    if (rh->hasPositionAndError() || !computeCoarseLocalPosition) {
      theHitData = SiStripRecHit2D(*rh);
      return;
    }

    if (computeCoarseLocalPosition && !cpe){
      edm::LogError("TSiStripRecHit2DLocalPos")<<" trying to compute coarse local position but CPE is not provided. Not computing local position from disk for the transient tracking rechit.";
      theHitData = SiStripRecHit2D(*rh);
      return;
    }
    
    const GeomDetUnit* gdu = dynamic_cast<const GeomDetUnit*>(geom);
    LogDebug("TSiStripRecHit2DLocalPos")<<"calculating coarse position/error.";
    if (gdu){
      StripClusterParameterEstimator::LocalValues lval= theCPE->localParameters(rh->stripCluster(), *gdu);
      theHitData = SiStripRecHit2D(lval.first, lval.second, geom->geographicalId(),rh->omniCluster());
    } else{
      edm::LogError("TSiStripRecHit2DLocalPos")<<" geomdet does not cast into geomdet unit. cannot create strip local parameters.";
    theHitData = SiStripRecHit2D(*rh);
    }
  }
  
  TSiStripRecHit2DLocalPos( const LocalPoint& pos, const LocalError& err,
                            const GeomDet* det,
                            const OmniClusterRef & clust,
                            const StripClusterParameterEstimator* cpe) :
    TValidTrackingRecHit(det), 
    theCPE(cpe), theHitData(pos, err, det->geographicalId(), clust) {} 
    
  virtual TSiStripRecHit2DLocalPos* clone() const {
    return new TSiStripRecHit2DLocalPos(*this);
  }
  
  virtual ConstRecHitContainer transientHits() const;
  
};

#endif