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File indexing completed on 2021-08-10 22:49:47

0001 #include "CommonTools/Utils/interface/LazyConstructed.h"
0002 #include "FWCore/ParameterSet/interface/ParameterSet.h"
0003 #include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
0004 #include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
0005 #include "FWCore/MessageLogger/interface/MessageLogger.h"
0006 #include "DataFormats/EgammaCandidates/interface/GsfElectronCore.h"
0007 #include "DataFormats/ParticleFlowReco/interface/GsfPFRecTrack.h"
0008 #include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
0009 #include "DataFormats/EgammaReco/interface/ElectronSeed.h"
0010 #include "FWCore/Framework/interface/global/EDProducer.h"
0011 #include "FWCore/Framework/interface/Event.h"
0012 #include "FWCore/Framework/interface/EventSetup.h"
0013 #include "RecoEgamma/EgammaElectronAlgos/interface/GsfElectronTools.h"
0014 
0015 class GsfElectronCoreEcalDrivenProducer : public edm::global::EDProducer<> {
0016 public:
0017   static void fillDescriptions(edm::ConfigurationDescriptions&);
0018 
0019   explicit GsfElectronCoreEcalDrivenProducer(const edm::ParameterSet& conf);
0020   void produce(edm::StreamID, edm::Event&, const edm::EventSetup&) const override;
0021 
0022 private:
0023   const bool useGsfPfRecTracks_;
0024   const bool hgcalOnly_;
0025 
0026   const edm::EDGetTokenT<reco::GsfPFRecTrackCollection> gsfPfRecTracksToken_;
0027   const edm::EDGetTokenT<reco::GsfTrackCollection> gsfTracksToken_;
0028   const edm::EDGetTokenT<reco::TrackCollection> ctfTracksToken_;
0029 
0030   const edm::EDPutTokenT<reco::GsfElectronCoreCollection> putToken_;
0031 };
0032 
0033 using reco::ElectronSeedRef;
0034 using reco::GsfPFRecTrackCollection;
0035 using reco::GsfTrackCollection;
0036 using reco::SuperClusterRef;
0037 using reco::TrackCollection;
0038 
0039 void GsfElectronCoreEcalDrivenProducer::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
0040   edm::ParameterSetDescription desc;
0041   desc.add<edm::InputTag>("gsfPfRecTracks", {"pfTrackElec"});
0042   desc.add<edm::InputTag>("gsfTracks", {"electronGsfTracks"});
0043   desc.add<edm::InputTag>("ctfTracks", {"generalTracks"});
0044   desc.add<bool>("useGsfPfRecTracks", true);
0045   desc.add<bool>("hgcalOnly", false);
0046   descriptions.add("ecalDrivenGsfElectronCores", desc);
0047 }
0048 
0049 GsfElectronCoreEcalDrivenProducer::GsfElectronCoreEcalDrivenProducer(const edm::ParameterSet& config)
0050     : useGsfPfRecTracks_(config.getParameter<bool>("useGsfPfRecTracks")),
0051       hgcalOnly_(config.getParameter<bool>("hgcalOnly")),
0052       gsfPfRecTracksToken_(mayConsume<GsfPFRecTrackCollection>(config.getParameter<edm::InputTag>("gsfPfRecTracks"))),
0053       gsfTracksToken_(consumes<reco::GsfTrackCollection>(config.getParameter<edm::InputTag>("gsfTracks"))),
0054       ctfTracksToken_(consumes<reco::TrackCollection>(config.getParameter<edm::InputTag>("ctfTracks"))),
0055       putToken_(produces<reco::GsfElectronCoreCollection>()) {}
0056 
0057 void GsfElectronCoreEcalDrivenProducer::produce(edm::StreamID, edm::Event& event, const edm::EventSetup&) const {
0058   auto gsfTracksHandle = event.getHandle(gsfTracksToken_);
0059   auto ctfTracksHandle = event.getHandle(ctfTracksToken_);
0060 
0061   auto ctfTrackVariables = makeLazy<edm::soa::EtaPhiTable>(*ctfTracksHandle);
0062 
0063   // output
0064   reco::GsfElectronCoreCollection electrons;
0065 
0066   auto produceEcalDrivenCore = [&](const reco::GsfTrackRef& gsfTrackRef) {
0067     electrons.emplace_back(gsfTrackRef);
0068     auto& eleCore = electrons.back();
0069 
0070     if (!eleCore.ecalDrivenSeed()) {
0071       electrons.pop_back();
0072       return;
0073     }
0074 
0075     auto ctfpair = egamma::getClosestCtfToGsf(eleCore.gsfTrack(), ctfTracksHandle, ctfTrackVariables.value());
0076     eleCore.setCtfTrack(ctfpair.first, ctfpair.second);
0077 
0078     auto scRef = gsfTrackRef->extra()->seedRef().castTo<ElectronSeedRef>()->caloCluster().castTo<SuperClusterRef>();
0079     if (!scRef.isNull()) {
0080       // if hgcalOnly flag is true but this seed is not from HGCAL, skip it.
0081       if (hgcalOnly_ && !scRef->seed()->caloID().detector(reco::CaloID::DET_HGCAL_ENDCAP))
0082         electrons.pop_back();
0083       else
0084         eleCore.setSuperCluster(scRef);
0085     } else {
0086       electrons.pop_back();
0087       edm::LogWarning("GsfElectronCoreEcalDrivenProducer") << "Seed CaloCluster is not a SuperCluster, unexpected...";
0088     }
0089   };
0090 
0091   // loop on ecal driven tracks
0092   if (useGsfPfRecTracks_) {
0093     for (auto const& gsfPfRecTrack : event.get(gsfPfRecTracksToken_)) {
0094       produceEcalDrivenCore(gsfPfRecTrack.gsfTrackRef());
0095     }
0096   } else {
0097     for (unsigned int i = 0; i < gsfTracksHandle->size(); ++i) {
0098       produceEcalDrivenCore(edm::Ref<GsfTrackCollection>(gsfTracksHandle, i));
0099     }
0100   }
0101 
0102   event.emplace(putToken_, std::move(electrons));
0103 }
0104 
0105 #include "FWCore/Framework/interface/MakerMacros.h"
0106 DEFINE_FWK_MODULE(GsfElectronCoreEcalDrivenProducer);