PFElectronTranslator.h

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#ifndef RecoParticleFlow_PFProducer_PFElectronTranslator_H
#define RecoParticleFlow_PFProducer_PFElectronTranslator_H
#include "FWCore/Framework/interface/stream/EDProducer.h"
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementFwd.h"
#include "DataFormats/Common/interface/ValueMap.h"
#include "DataFormats/EgammaReco/interface/BasicClusterFwd.h"
#include "DataFormats/EgammaReco/interface/PreshowerClusterFwd.h"
#include "DataFormats/EgammaReco/interface/SuperClusterFwd.h"
#include "DataFormats/EgammaCandidates/interface/GsfElectronFwd.h"
#include "DataFormats/EgammaCandidates/interface/GsfElectronCoreFwd.h"
#include "DataFormats/CaloRecHit/interface/CaloClusterFwd.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include <iostream>
#include <string>
#include <map>



class PFElectronTranslator : public edm::stream::EDProducer<>
{
 public:
  explicit PFElectronTranslator(const edm::ParameterSet&);
  ~PFElectronTranslator() override;
  
  void produce(edm::Event &, const edm::EventSetup&) override;

  typedef std::vector< edm::Handle< edm::ValueMap<double> > > IsolationValueMaps;


 private:
  // to retrieve the collection from the event
  bool fetchCandidateCollection(edm::Handle<reco::PFCandidateCollection>& c, 
                const edm::InputTag& tag, 
                const edm::Event& iEvent) const;
  // to retrieve the collection from the event
  void fetchGsfCollection(edm::Handle<reco::GsfTrackCollection>& c, 
              const edm::InputTag& tag, 
              const edm::Event& iEvent) const ;

  // makes a basic cluster from PFBlockElement and add it to the collection ; the corrected energy is taken
  // from the PFCandidate
  void createBasicCluster(const reco::PFBlockElement & ,  reco::BasicClusterCollection & basicClusters,
              std::vector<const reco::PFCluster *> &,
              const reco::PFCandidate & coCandidate) const;
  // makes a preshower cluster from of PFBlockElement and add it to the collection
  void createPreshowerCluster(const reco::PFBlockElement & PFBE, 
                  reco::PreshowerClusterCollection& preshowerClusters,
                  unsigned plane) const;

  // make a super cluster from its ingredients and add it to the collection
  void createSuperClusters(const reco::PFCandidateCollection &,
              reco::SuperClusterCollection &superClusters) const;

  // make GsfElectronCores from ingredients
  void createGsfElectronCores(reco::GsfElectronCoreCollection &) const;

  // create the basic cluster Ptr
  void createBasicClusterPtrs(const edm::OrphanHandle<reco::BasicClusterCollection> & basicClustersHandle );

  // create the preshower cluster Refs
  void createPreshowerClusterPtrs(const edm::OrphanHandle<reco::PreshowerClusterCollection> & preshowerClustersHandle );

  // create the super cluster Refs
  void createSuperClusterGsfMapRefs(const edm::OrphanHandle<reco::SuperClusterCollection> & superClustersHandle );

  // create the GsfElectronCore Refs
  void createGsfElectronCoreRefs(const edm::OrphanHandle<reco::GsfElectronCoreCollection> & gsfElectronCoreHandle);

  // create the GsfElectrons
  void createGsfElectrons(const reco::PFCandidateCollection &,
              const IsolationValueMaps& isolationValues,
              reco::GsfElectronCollection &);

  // The following methods are used to fill the value maps
  void fillMVAValueMap(edm::Event& iEvent, edm::ValueMap<float>::Filler & filler) ;
  void fillValueMap(edm::Event& iEvent, edm::ValueMap<float>::Filler & filler) const;
  void fillSCRefValueMap(edm::Event& iEvent, 
             edm::ValueMap<reco::SuperClusterRef>::Filler & filler) const;
  void getAmbiguousGsfTracks(const reco::PFBlockElement & PFBE, std::vector<reco::GsfTrackRef>& ) const ; 


  const reco::PFCandidate & correspondingDaughterCandidate(const reco::PFCandidate & cand, const reco::PFBlockElement & pfbe) const;
 private:
  edm::InputTag inputTagPFCandidates_;
  edm::InputTag inputTagPFCandidateElectrons_;
  edm::InputTag inputTagGSFTracks_;
  std::vector<edm::InputTag> inputTagIsoVals_;
  std::string PFBasicClusterCollection_;
  std::string PFPreshowerClusterCollection_;
  std::string PFSuperClusterCollection_;
  std::string PFMVAValueMap_;
  std::string PFSCValueMap_;
  std::string GsfElectronCoreCollection_;
  std::string GsfElectronCollection_;
  double MVACut_;
  bool checkStatusFlag_;

  // The following vectors correspond to a GSF track, but the order is not 
  // the order of the tracks in the GSF track collection
  std::vector<reco::GsfTrackRef> GsfTrackRef_;  
  // the list of candidatePtr
  std::vector<reco::CandidatePtr> CandidatePtr_;
  //the list of KfTrackRef
  std::vector<reco::TrackRef> kfTrackRef_;
  // the list of ambiguous tracks
  std::vector<std::vector<reco::GsfTrackRef> > ambiguousGsfTracks_;
  // the collection of basic clusters associated to a GSF track
  std::vector<reco::BasicClusterCollection> basicClusters_;
  // the correcsponding PFCluster ref
  std::vector<std::vector<const reco::PFCluster *> > pfClusters_;
  // the collection of preshower clusters associated to a GSF track
  std::vector<reco::PreshowerClusterCollection> preshowerClusters_;
  // the super cluster collection (actually only one) associated to a GSF track
  std::vector<reco::SuperClusterCollection> superClusters_;
  // the references to the basic clusters associated to a GSF track
  std::vector<reco::CaloClusterPtrVector> basicClusterPtr_;
  // the references to the basic clusters associated to a GSF track
  std::vector<reco::CaloClusterPtrVector> preshowerClusterPtr_;
  // the references to the GsfElectonCore associated to a GSF track
  std::vector<reco::GsfElectronCoreRef> gsfElectronCoreRefs_;
  // keep track of the index of the PF Candidate
  std::vector<int> gsfPFCandidateIndex_;
  // maps to ease the creation of the Value Maps 
  std::map<reco::GsfTrackRef,reco::SuperClusterRef> scMap_;
  std::map<reco::GsfTrackRef,float> gsfMvaMap_;

  bool emptyIsOk_;

};

DEFINE_FWK_MODULE(PFElectronTranslator);

#endif