/data/refman/pasoursint/CMSSW_6_1_2_SLHC2/src/SimTracker/TrackAssociation/interface/TrackAssociatorByHits.h

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#ifndef TrackAssociatorByHits_h
#define TrackAssociatorByHits_h

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "DataFormats/Common/interface/Ref.h"
#include "SimTracker/TrackerHitAssociation/interface/TrackerHitAssociator.h"

//reco track
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
//TrackingParticle
#include "SimDataFormats/TrackingAnalysis/interface/TrackingParticle.h"
#include "SimDataFormats/EncodedEventId/interface/EncodedEventId.h"
#include "SimTracker/TrackAssociation/interface/TrackAssociatorBase.h"

class TrackAssociatorByHits : public TrackAssociatorBase {
  
 public:

  enum SimToRecoDenomType {denomnone,denomsim,denomreco};

  explicit TrackAssociatorByHits( const edm::ParameterSet& );  
  ~TrackAssociatorByHits();
  
  /* Associate SimTracks to RecoTracks By Hits */
 
  reco::RecoToSimCollection associateRecoToSim(const edm::RefToBaseVector<reco::Track>&,
                                               const edm::RefVector<TrackingParticleCollection>&,
                                               const edm::Event * event = 0,
                                               const edm::EventSetup * setup = 0 ) const ;
  reco::SimToRecoCollection associateSimToReco(const edm::RefToBaseVector<reco::Track>&,
                                               const edm::RefVector<TrackingParticleCollection>&,
                                               const edm::Event * event = 0,
                                               const edm::EventSetup * setup = 0 ) const ;
  
  reco::RecoToSimCollection associateRecoToSim(edm::Handle<edm::View<reco::Track> >& tCH, 
                                               edm::Handle<TrackingParticleCollection>& tPCH, 
                                               const edm::Event * event = 0,
                                               const edm::EventSetup * setup = 0) const {
    return TrackAssociatorBase::associateRecoToSim(tCH,tPCH,event,setup);
  }
  
  reco::SimToRecoCollection associateSimToReco(edm::Handle<edm::View<reco::Track> >& tCH, 
                                               edm::Handle<TrackingParticleCollection>& tPCH,
                                               const edm::Event * event = 0,
                                               const edm::EventSetup * setup = 0) const {
    return TrackAssociatorBase::associateSimToReco(tCH,tPCH,event,setup);
  }  

  //seed
  reco::RecoToSimCollectionSeed associateRecoToSim(const edm::Handle<edm::View<TrajectorySeed> >&, 
                                                   const edm::Handle<TrackingParticleCollection>&, 
                                                   const edm::Event * event = 0,
                                                   const edm::EventSetup * setup = 0) const;
  
  reco::SimToRecoCollectionSeed associateSimToReco(const edm::Handle<edm::View<TrajectorySeed> >&, 
                                                   const edm::Handle<TrackingParticleCollection>&, 
                                                   const edm::Event * event = 0,
                                                   const edm::EventSetup * setup = 0) const;
  template<typename iter>
  void getMatchedIds(std::vector<SimHitIdpr>&, 
                     std::vector<SimHitIdpr>&, 
                     int&, 
                     iter,
                     iter,
                     TrackerHitAssociator*) const;
  
  int getShared(std::vector<SimHitIdpr>&, 
                std::vector<SimHitIdpr>&,
                TrackingParticleCollection::const_iterator) const;

  template<typename iter>
  int getDoubleCount(iter,iter,TrackerHitAssociator*,TrackingParticleCollection::const_iterator) const;

 private:
  // ----- member data
  const edm::ParameterSet& conf_;
  const bool AbsoluteNumberOfHits;
  SimToRecoDenomType SimToRecoDenominator;
  const double quality_SimToReco;
  const double purity_SimToReco;
  const double cut_RecoToSim;
  const bool UsePixels;
  const bool UseGrouped;
  const bool UseSplitting;
  const bool ThreeHitTracksAreSpecial;
  int LayerFromDetid(const DetId&) const;

  const TrackingRecHit* getHitPtr(edm::OwnVector<TrackingRecHit>::const_iterator iter) const {return &*iter;}
  const TrackingRecHit* getHitPtr(trackingRecHit_iterator iter) const {return &**iter;}
};

#endif