GEDGsfElectronFinalizer.cc

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#include "RecoEgamma/EgammaElectronProducers/plugins/GEDGsfElectronFinalizer.h"

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"

#include "DataFormats/EgammaCandidates/interface/GsfElectron.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"

#include <iostream>
#include <string>

using namespace reco;

GEDGsfElectronFinalizer::GEDGsfElectronFinalizer( const edm::ParameterSet & cfg )
 {   
   previousGsfElectrons_ = consumes<reco::GsfElectronCollection>(cfg.getParameter<edm::InputTag>("previousGsfElectronsTag"));
   pfCandidates_ = consumes<reco::PFCandidateCollection>(cfg.getParameter<edm::InputTag>("pfCandidatesTag"));
   outputCollectionLabel_ = cfg.getParameter<std::string>("outputCollectionLabel");
   edm::ParameterSet pfIsoVals(cfg.getParameter<edm::ParameterSet> ("pfIsolationValues"));
   
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumChargedHadronPt")));
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumPhotonEt")));
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumNeutralHadronEt")));
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumPUPt")));
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumEcalClusterEt")));
   tokenElectronIsoVals_.push_back(consumes<edm::ValueMap<float> >(pfIsoVals.getParameter<edm::InputTag>("pfSumHcalClusterEt")));

   nDeps_ =  tokenElectronIsoVals_.size();

   if( cfg.existsAs<edm::ParameterSet>("regressionConfig") ) {
     const edm::ParameterSet& iconf = cfg.getParameterSet("regressionConfig");
     const std::string& mname = iconf.getParameter<std::string>("modifierName");
     edm::ConsumesCollector&& cc = consumesCollector();
     ModifyObjectValueBase* plugin = 
       ModifyObjectValueFactory::get()->create(mname,iconf,cc);
     gedRegression_.reset(plugin);
   } else {
     gedRegression_.reset(nullptr);
   }

   produces<reco::GsfElectronCollection> (outputCollectionLabel_);
}

GEDGsfElectronFinalizer::~GEDGsfElectronFinalizer()
 {}

// ------------ method called to produce the data  ------------
void GEDGsfElectronFinalizer::produce( edm::Event & event, const edm::EventSetup & setup )
 {
   
   // Output collection
   auto outputElectrons_p = std::make_unique<reco::GsfElectronCollection>();
   
   if( gedRegression_ ) {
     gedRegression_->setEvent(event);
     gedRegression_->setEventContent(setup);
   }

   // read input collections
   // electrons
   edm::Handle<reco::GsfElectronCollection> gedElectronHandle;
   event.getByToken(previousGsfElectrons_,gedElectronHandle);

   // PFCandidates
   edm::Handle<reco::PFCandidateCollection> pfCandidateHandle;
   event.getByToken(pfCandidates_,pfCandidateHandle);
   // value maps
   std::vector< edm::Handle< edm::ValueMap<float> > > isolationValueMaps(nDeps_);

   for(unsigned i=0; i < nDeps_ ; ++i) {
     event.getByToken(tokenElectronIsoVals_[i],isolationValueMaps[i]);
   }

   // prepare a map of PFCandidates having a valid GsfTrackRef to save time
   std::map<reco::GsfTrackRef, const reco::PFCandidate* > gsfPFMap;
   reco::PFCandidateCollection::const_iterator it = pfCandidateHandle->begin();
   reco::PFCandidateCollection::const_iterator itend = pfCandidateHandle->end() ;
   for(;it!=itend;++it) {
     // First check that the GsfTrack is non null
     if( it->gsfTrackRef().isNonnull()) {
       if(abs(it->pdgId())==11) // consider only the electrons 
     gsfPFMap[it->gsfTrackRef()]=&(*it);
     }
   }

   
   // Now loop on the electrons
   unsigned nele=gedElectronHandle->size();
   for(unsigned iele=0; iele<nele;++iele) {
     reco::GsfElectronRef myElectronRef(gedElectronHandle,iele);
     
     reco::GsfElectron newElectron(*myElectronRef);
     reco::GsfElectron::PflowIsolationVariables isoVariables;
     isoVariables.sumChargedHadronPt = (*(isolationValueMaps)[0])[myElectronRef];
     isoVariables.sumPhotonEt = (*(isolationValueMaps)[1])[myElectronRef];
     isoVariables.sumNeutralHadronEt = (*(isolationValueMaps)[2])[myElectronRef];
     isoVariables.sumPUPt = (*(isolationValueMaps)[3])[myElectronRef];
     isoVariables.sumEcalClusterEt = (*(isolationValueMaps)[4])[myElectronRef];
     isoVariables.sumHcalClusterEt = (*(isolationValueMaps)[5])[myElectronRef];

     newElectron.setPfIsolationVariables(isoVariables);

     // now set a status if not already done (in GEDGsfElectronProducer.cc)
     //     std::cout << " previous status " << newElectron.mvaOutput().status << std::endl;
     if(newElectron.mvaOutput().status<=0) { 
       std::map<reco::GsfTrackRef, const  reco::PFCandidate * >::const_iterator itcheck=gsfPFMap.find(newElectron.gsfTrack());
       reco::GsfElectron::MvaOutput myMvaOutput(newElectron.mvaOutput());
       if(itcheck!=gsfPFMap.end()) {
     // it means that there is a PFCandidate with the same GsfTrack
     myMvaOutput.status = 3; //as defined in PFCandidateEGammaExtra.h
     newElectron.setPassPflowPreselection(true); //this is currently fully redundant with mvaOutput.stats so candidate for removal
       }
       else{
     myMvaOutput.status = 4 ; //
     newElectron.setPassPflowPreselection(false);//this is currently fully redundant with mvaOutput.stats so candidate for removal   
       }
       newElectron.setMvaOutput(myMvaOutput);
     }
     
     if( gedRegression_ ) {
       gedRegression_->modifyObject(newElectron);
     }
     outputElectrons_p->push_back(newElectron);
   }
   
   event.put(std::move(outputElectrons_p),outputCollectionLabel_);
 }