TrackingRecHit.h

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#ifndef TrackingRecHit_h
#define TrackingRecHit_h

#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/GeometrySurface/interface/LocalError.h"
#include "DataFormats/GeometryVector/interface/LocalPoint.h"
#include "DataFormats/TrackingRecHit/interface/KfComponentsHolder.h"
#include "FWCore/Utilities/interface/GCC11Compatibility.h"

class TrackingRecHit {
public:

  friend class MuonTransientTrackingRecHit;

  typedef unsigned int id_type;
  
  enum Type { valid = 0, missing = 1, inactive = 2, bad = 3 };
  static const int typeMask = 0xf;  // mask for the above
  static const int rttiShift = 24; // shift amount to get the rtti
 
  enum SharedInputType {all, some};
  
  explicit TrackingRecHit(DetId id, Type type=valid ) : m_id(id), m_status(type) {}
  explicit TrackingRecHit(id_type id=0, Type type=valid ) : m_id(id), m_status(type) {}

  TrackingRecHit(DetId id, unsigned int rt, Type type=valid  ) : m_id(id), m_status((rt<< rttiShift)|int(type)) {}

  
  virtual ~TrackingRecHit() {}
  
  virtual TrackingRecHit * clone() const = 0;
  
  virtual AlgebraicVector parameters() const = 0;
  
  virtual AlgebraicSymMatrix parametersError() const = 0;
  
  virtual AlgebraicMatrix projectionMatrix() const = 0;

  virtual void getKfComponents( KfComponentsHolder & holder ) const ; 
 
  virtual int dimension() const = 0;
  
  virtual std::vector<const TrackingRecHit*> recHits() const = 0;
  virtual void recHitsV(std::vector<const TrackingRecHit*> & ) const;
  
  virtual std::vector<TrackingRecHit*> recHits() = 0;
  virtual void recHitsV(std::vector<TrackingRecHit*> & );
  

  id_type rawId() const { return m_id;}
  DetId geographicalId() const {return m_id;}
  
  virtual LocalPoint localPosition() const = 0;
  
  virtual LocalError localPositionError() const = 0;

  virtual bool hasPositionAndError() const {return true;}; 
  
  virtual float weight() const {return 1.;}
  
  Type type() const { return Type(typeMask&m_status); }
  Type getType() const { return Type(typeMask&m_status); }
  bool isValid() const {return getType()==valid;}
  
  unsigned int getRTTI() const { return m_status >> rttiShift;}

  virtual bool sharesInput( const TrackingRecHit* other, SharedInputType what) const;

protected:
  // used by muon...
  void setId(id_type iid) { m_id=iid;}
  void setType(Type ttype) { m_status=ttype;}
  
  void setRTTI (unsigned int rt) { m_status &= (rt<< rttiShift);} // can be done only once...

private:
  
  id_type m_id;

  unsigned int m_status; // bit assigned (type 0-8) (rtti 24-31) 
    
};

#endif