/data/refman/pasoursint/CMSSW_4_2_9_HLT1_bphpatch4/src/RecoTracker/TransientTrackingRecHit/interface/TSiTrackerMultiRecHit.h

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#ifndef TSiTrackerMultiRecHit_h
#define TSiTrackerMultiRecHit_h

#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "DataFormats/TrackerRecHit2D/interface/SiTrackerMultiRecHit.h"
#include "TrackingTools/TransientTrackingRecHit/interface/HelpertRecHit2DLocalPos.h"
#include "Geometry/CommonDetUnit/interface/GeomDetUnit.h"

/*
A TransientTrackingRecHit for the SiTrackerMultiRecHit
*/

class TSiTrackerMultiRecHit : public TransientTrackingRecHit {
        public:
        //virtual ~TSiTrackerMultiRecHit() {delete theHitData;}
        virtual ~TSiTrackerMultiRecHit() {}
        
        virtual AlgebraicVector parameters() const {return theHitData.parameters();}
        virtual AlgebraicSymMatrix parametersError() const {
                return HelpertRecHit2DLocalPos().parError( theHitData.localPositionError(), *det());
                //return theHitData.parametersError();
        }

        virtual void getKfComponents( KfComponentsHolder & holder ) const {
            HelpertRecHit2DLocalPos().getKfComponents(holder, theHitData, *det()); 
        }
        virtual DetId geographicalId() const {return theHitData.geographicalId();}
        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;};
        const SiTrackerMultiRecHit* specificHit() const {return &theHitData;}

        virtual bool isValid() const{return theHitData.isValid();}

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

        virtual const GeomDetUnit* detUnit() const;

        virtual bool canImproveWithTrack() const {return true;}

        virtual RecHitPointer clone(const TrajectoryStateOnSurface& ts) const;

        virtual ConstRecHitContainer transientHits() const {return theComponents;};

        static RecHitPointer build( const GeomDet * geom, const SiTrackerMultiRecHit* rh, 
                                    const ConstRecHitContainer& components, float annealing=1.){
                return RecHitPointer(new TSiTrackerMultiRecHit( geom, rh, components, annealing));
        }
        private:
        SiTrackerMultiRecHit theHitData;
        //holds the TransientTrackingRecHit components of the MultiRecHit with up-to-date weights 
        ConstRecHitContainer theComponents;   
        
        TSiTrackerMultiRecHit(const GeomDet * geom, const SiTrackerMultiRecHit* rh,  
                              const ConstRecHitContainer& components, float annealing):
                TransientTrackingRecHit(geom,1, annealing), theHitData(*rh), theComponents(components){}
      
        virtual TSiTrackerMultiRecHit* clone() const {
                return new TSiTrackerMultiRecHit(*this);
        }

};              

#endif