TransientInitialStateEstimator.h

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#ifndef TransientInitialStateEstimator_H
#define TransientInitialStateEstimator_H

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "RecoTracker/TransientTrackingRecHit/interface/TkClonerImpl.h"

#include <utility>

class Propagator;
class GeomDet;
class Trajectory;
class TrackingComponentsRecord;
namespace edm { class EventSetup;}


class TransientInitialStateEstimator {
public:

  typedef TrajectoryStateOnSurface TSOS;

  TransientInitialStateEstimator(const edm::ParameterSet& conf);
  void setEventSetup( const edm::EventSetup& es, const TkClonerImpl& hc );

  std::pair<TrajectoryStateOnSurface, const GeomDet*>
    innerState( const Trajectory& traj, bool doBackFit=true) const;


private:
  const std::string thePropagatorAlongName;
  const std::string thePropagatorOppositeName;
  const Propagator *thePropagatorAlong;
  const Propagator *thePropagatorOpposite; // not used? can we remove it?
  TkClonerImpl theHitCloner;
  const int theNumberMeasurementsForFit;
};

#endif