/data/refman/pasoursint/CMSSW_4_1_8_patch13/src/RecoTracker/NuclearSeedGenerator/interface/NuclearInteractionFinder.h

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#ifndef CD_NuclearInteractionFinder_H_
#define CD_NuclearInteractionFinder_H_

//----------------------------------------------------------------------------
//-----------------------------------------------------------------------------

#include "TrackingTools/GeomPropagators/interface/Propagator.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "TrackingTools/TrajectoryState/interface/FreeTrajectoryState.h"
#include "TrackingTools/PatternTools/interface/TrajectoryStateUpdator.h"
#include "TrackingTools/PatternTools/interface/Trajectory.h"
#include "TrackingTools/TrackFitters/interface/TrajectoryFitter.h"
#include "TrackingTools/PatternTools/interface/TrajectoryMeasurement.h"
#include "TrackingTools/PatternTools/interface/MeasurementEstimator.h"
#include "TrackingTools/MeasurementDet/interface/LayerMeasurements.h"

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

#include "RecoTracker/MeasurementDet/interface/MeasurementTracker.h"
#include "RecoTracker/TkDetLayers/interface/GeometricSearchTracker.h"

#include "MagneticField/Engine/interface/MagneticField.h"

#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"

#include "RecoTracker/NuclearSeedGenerator/interface/NuclearTester.h"
#include "RecoTracker/NuclearSeedGenerator/interface/SeedFromNuclearInteraction.h"
#include "RecoTracker/NuclearSeedGenerator/interface/TangentHelix.h"

#include "TrackingTools/DetLayers/interface/NavigationSetter.h"
#include "TrackingTools/DetLayers/interface/NavigationSchool.h"
#include "RecoTracker/TkNavigation/interface/SimpleNavigationSchool.h"


#include <boost/shared_ptr.hpp>

class NuclearInteractionFinder {
private:

  typedef TrajectoryStateOnSurface TSOS;
  typedef FreeTrajectoryState FTS;
  typedef TrajectoryMeasurement TM;
  typedef std::vector<Trajectory> TrajectoryContainer;
  typedef TrajectoryMeasurement::ConstRecHitPointer    ConstRecHitPointer;

  void fillSeeds( const std::pair<TrajectoryMeasurement, std::vector<TrajectoryMeasurement> >& tmPairs );

  std::vector<TrajectoryMeasurement>
         findCompatibleMeasurements( const TM& lastMeas, double rescaleFactor) const;

  std::vector<TrajectoryMeasurement>
         findMeasurementsFromTSOS(const TSOS& currentState, DetId detid) const;

  void definePrimaryHelix(std::vector<TrajectoryMeasurement>::const_iterator it_meas);

public:

  NuclearInteractionFinder(){}

  NuclearInteractionFinder(const edm::EventSetup& es, const edm::ParameterSet& iConfig);

  virtual ~NuclearInteractionFinder();

  bool  run(const Trajectory& traj);

  void  setEvent(const edm::Event& event) const;

  std::auto_ptr<TrajectorySeedCollection>  getPersistentSeeds();

  void  improveSeeds();

  TrajectoryStateOnSurface rescaleError(float rescale, const TSOS& state) const;

  const NavigationSchool* nav() const { return theNavigationSchool; }

private:

  const Propagator*               thePropagator;
  const MeasurementEstimator*     theEstimator;
  const MeasurementTracker*       theMeasurementTracker;
  const LayerMeasurements*        theLayerMeasurements;
  const GeometricSearchTracker*   theGeomSearchTracker;
  const NavigationSchool*         theNavigationSchool;
  edm::ESHandle<MagneticField>    theMagField;

  NuclearTester*                             nuclTester;
  SeedFromNuclearInteraction                   *currentSeed;
  std::vector< SeedFromNuclearInteraction >    allSeeds;
  TangentHelix*                              thePrimaryHelix;

  // parameters
  double        ptMin;
  unsigned int  maxHits;
  double        rescaleErrorFactor;
  bool          checkCompletedTrack; 
  std::string   navigationSchoolName;

};
#endif