Reconstruction/MdcPatRec/TrkBase/include/TrkBase/TrkHitUse.h

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//--------------------------------------------------------------------------
// File and Version Information:
//      $Id: TrkHitUse.h,v 1.1.1.1 2005/04/21 06:01:42 zhangy Exp $
//
// Description:
//     Carries information about how a hit is to be used on a track, and
// is able to create the appropriate kind of HitOnTrk.  Abstract base class.
//
// Environment:
//      Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author(s): Steve Schaffner
//
//------------------------------------------------------------------------
#ifndef TRKHITUSE_HH
#define TRKHITUSE_HH
 
class TrkFundHit;
class TrkHitOnTrk;
class TrkRep;
// class SvtHit;
class MdcHit;
 
// Class interface //
class TrkHitUse {
 
public:
  TrkHitUse( const TrkFundHit&, double fltLen, bool active = true, int usable = 1 );
  virtual ~TrkHitUse();
 
  bool                  isActive() const { return _isActive; }
  int                   isUsable() const { return _isUsable; }
  double                fltLen() const { return _fltLen; }
  const TrkFundHit&     hit() const { return _hit; }
  virtual const MdcHit* mdcHit() const;
  //  virtual const SvtHit*     svtHit()   const;
 
  virtual TrkHitOnTrk* createHitOnTrk( const TrkRep& ) const = 0;
  void                 setFltLen( double flt ) { _fltLen = flt; }
 
  // operator== tests on equality of contents: FundHit address and anything
  //  relevant in the derived classes (e.g. ambiguity for Mdc).  It does
  //  not test flight length.
  virtual bool operator==( const TrkHitUse& ) const = 0;
 
private:
  const TrkFundHit& _hit;
  bool              _isActive;
  int               _isUsable;
  double            _fltLen;
 
  // Preempt
  TrkHitUse& operator=( const TrkHitUse& );
  TrkHitUse( const TrkHitUse& );
};
 
#endif