/data/refman/pasoursint/CMSSW_4_1_8_patch9/src/DataFormats/CSCRecHit/interface/CSCSegment.h

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#ifndef CSCRecHit_CSCSegment_h
#define CSCRecHit_CSCSegment_h

#include <DataFormats/TrackingRecHit/interface/RecSegment.h>
#include <DataFormats/CSCRecHit/interface/CSCRecHit2DCollection.h>

#include <iosfwd>

class CSCDetId;

class CSCSegment : public RecSegment {

public:

    CSCSegment() : theChi2(0.), aME11a_duplicate(false) {}
        
    CSCSegment(std::vector<const CSCRecHit2D*> proto_segment, LocalPoint origin, 
                LocalVector direction, AlgebraicSymMatrix errors, double chi2);
  
    virtual ~CSCSegment();

    //--- Base class interface
    CSCSegment* clone() const { return new CSCSegment(*this); }

    LocalPoint localPosition() const { return theOrigin; }
    LocalError localPositionError() const ;
        
    LocalVector localDirection() const { return theLocalDirection; }
    LocalError localDirectionError() const ;

    AlgebraicVector parameters() const;

    AlgebraicSymMatrix parametersError() const { return theCovMatrix; }

    virtual AlgebraicMatrix projectionMatrix() const;

    virtual std::vector<const TrackingRecHit*> recHits() const;

    virtual std::vector<TrackingRecHit*> recHits();

    double chi2() const { return theChi2; };

    virtual int dimension() const { return 4; }

    virtual int degreesOfFreedom() const { return 2*nRecHits() - 4;}     

    //--- Extension of the interface
        
    const std::vector<CSCRecHit2D>& specificRecHits() const { return theCSCRecHits; }

    int nRecHits() const { return theCSCRecHits.size(); }        

    CSCDetId cscDetId() const { return  geographicalId(); }

    void setDuplicateSegments(std::vector<CSCSegment*>& duplicates);

    bool isME11a_duplicate() const { return (theDuplicateSegments.size() > 0 ? true : false); }
    // a copy of the duplicated segments (ME1/1a only) 
    const std::vector< CSCSegment> & duplicateSegments() const { return theDuplicateSegments; } 
    
    bool testSharesAllInSpecificRecHits( const std::vector<CSCRecHit2D>& specificRecHits_1,
                                         const std::vector<CSCRecHit2D>& specificRecHits_2,
                                         CSCRecHit2D::SharedInputType) const;
    
    //bool sharesRecHits(CSCSegment  & anotherSegment, CSCRecHit2D::SharedInputType);
    // checks if ALL the rechits share the specific input (allWires, allStrips or all)
    bool sharesRecHits(const CSCSegment  & anotherSegment, CSCRecHit2D::SharedInputType sharesInput) const;
    // checks if ALL the rechits share SOME wire AND SOME strip input
    bool sharesRecHits(const CSCSegment  & anotherSegment) const;
    
    void print() const;         
    
 private:
    
    std::vector<CSCRecHit2D> theCSCRecHits;
    LocalPoint theOrigin;   // in chamber frame - the GeomDet local coordinate system
    LocalVector theLocalDirection; // in chamber frame - the GeomDet local coordinate system
    AlgebraicSymMatrix theCovMatrix; // the covariance matrix
    double theChi2;
    bool aME11a_duplicate;
    std::vector<CSCSegment> theDuplicateSegments;// ME1/1a only
};

std::ostream& operator<<(std::ostream& os, const CSCSegment& seg);

#endif // CSCRecHit_CSCSegment_h