/data/refman/pasoursint/CMSSW_5_3_3/src/TrackingTools/KalmanUpdators/interface/Chi2MeasurementEstimatorBase.h

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#ifndef CommonDet_Chi2MeasurementEstimatorBase_H
#define CommonDet_Chi2MeasurementEstimatorBase_H

#include "TrackingTools/PatternTools/interface/MeasurementEstimator.h"

class Chi2MeasurementEstimatorBase : public MeasurementEstimator {
public:

  explicit Chi2MeasurementEstimatorBase(double maxChi2, double nSigma = 3.) : 
    theMaxChi2(maxChi2), theNSigma(nSigma) {}

  virtual std::pair<bool, double> estimate(const TrajectoryStateOnSurface& ts,
                                           const TransientTrackingRecHit &) const = 0;

  virtual bool estimate( const TrajectoryStateOnSurface& ts, 
                         const BoundPlane& plane) const;

  virtual Local2DVector 
  maximalLocalDisplacement( const TrajectoryStateOnSurface& ts,
                            const BoundPlane& plane) const;

  double chiSquaredCut() const {return theMaxChi2;}
  double nSigmaCut() const {return theNSigma;}

protected:

  std::pair<bool,double> returnIt( double est) const {
    return est > chiSquaredCut() ? HitReturnType(false,est) : HitReturnType(true,est);
  }

private:
  double theMaxChi2;
  double theNSigma;
};

#endif