/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/RecoTracker/ConversionSeedGenerators/interface/SeedForPhotonConversion1Leg.h

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#ifndef SeedForPhotonConversion1Leg_H
#define SeedForPhotonConversion1Leg_H

#include "RecoTracker/TkSeedGenerator/interface/SeedCreator.h"
#include "RecoTracker/TkSeedingLayers/interface/SeedingHitSet.h"
#include "RecoTracker/ConversionSeedGenerators/interface/PrintRecoObjects.h"
class FreeTrajectoryState;

class SeedForPhotonConversion1Leg : public SeedCreator {
public:
  static const int cotTheta_Max=99999;
  
  SeedForPhotonConversion1Leg( const edm::ParameterSet & cfg):
    thePropagatorLabel(cfg.getParameter<std::string>("propagator")),
    theBOFFMomentum(cfg.existsAs<double>("SeedMomentumForBOFF") ? cfg.getParameter<double>("SeedMomentumForBOFF") : 5.0)
      {}

  SeedForPhotonConversion1Leg( 
      const std::string & propagator = "PropagatorWithMaterial", double seedMomentumForBOFF = -5.0) 
   : thePropagatorLabel(propagator), theBOFFMomentum(seedMomentumForBOFF) { }

  //dtor
  virtual ~SeedForPhotonConversion1Leg(){}

  virtual const TrajectorySeed * trajectorySeed( TrajectorySeedCollection & seedCollection,
                                                 const SeedingHitSet & hits,
                                                 const GlobalPoint & vertex,
                                                 const GlobalVector & vertexBounds,
                                                 float ptmin,
                                                 const edm::EventSetup& es,
                                                 float cotTheta,
                                                 std::stringstream& ss);

  virtual const TrajectorySeed *trajectorySeed(
                                               TrajectorySeedCollection & seedCollection,
                                               const SeedingHitSet & hits,
                                               const TrackingRegion & region,
                                               const edm::EventSetup& es,
                                               const SeedComparitor *filter){ return 0;}
  
 protected:

  virtual bool checkHit(
                        const TrajectoryStateOnSurface &,
                        const TransientTrackingRecHit::ConstRecHitPointer &hit,
                        const edm::EventSetup& es) const { return true; }

  virtual GlobalTrajectoryParameters initialKinematic(
                                                      const SeedingHitSet & hits, 
                                                      const GlobalPoint & vertexPos, 
                                                      const edm::EventSetup& es,
                                                      const float cotTheta) const;
  
  virtual CurvilinearTrajectoryError initialError(
                                                  const GlobalVector& vertexBounds, 
                                                  float ptMin,  
                                                  float sinTheta) const;
  
  virtual const TrajectorySeed * buildSeed(
                                           TrajectorySeedCollection & seedCollection,
                                           const SeedingHitSet & hits,
                                           const FreeTrajectoryState & fts,
                                           const edm::EventSetup& es) const;

  virtual TransientTrackingRecHit::RecHitPointer refitHit(
                                                          const TransientTrackingRecHit::ConstRecHitPointer &hit, 
                                                          const TrajectoryStateOnSurface &state) const;
  
protected:
  std::string thePropagatorLabel;
  double theBOFFMomentum;

  std::stringstream * pss;
  PrintRecoObjects po;
};
#endif