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File indexing completed on 2021-02-14 13:33:11

0001 #include "FWCore/Framework/interface/global/EDProducer.h"
0002 #include "FWCore/Framework/interface/Event.h"
0003 #include "FWCore/ParameterSet/interface/ParameterSet.h"
0004 #include "FWCore/Utilities/interface/InputTag.h"
0005 #include "FWCore/Framework/interface/MakerMacros.h"
0006 
0007 #include "DataFormats/Common/interface/View.h"
0008 #include "DataFormats/Candidate/interface/Candidate.h"
0009 #include "DataFormats/Candidate/interface/CandidateFwd.h"
0010 #include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
0011 #include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"
0012 
0013 #include "DataFormats/Math/interface/deltaR.h"
0014 
0015 class PFMatchedCandidateRefExtractor : public edm::global::EDProducer<> {
0016 public:
0017   explicit PFMatchedCandidateRefExtractor(const edm::ParameterSet& iConfig);
0018   ~PFMatchedCandidateRefExtractor() override;
0019 
0020   void produce(edm::StreamID iID, edm::Event& iEvent, const edm::EventSetup& iSetup) const override;
0021 
0022 private:
0023   edm::EDGetTokenT<edm::View<reco::Candidate>> col1Token_;
0024   edm::EDGetTokenT<edm::View<reco::Candidate>> col2Token_;
0025   std::string moduleLabel_;
0026   edm::EDGetTokenT<edm::View<reco::PFCandidate>> pfCandToken_;
0027 
0028   bool extractPFCands_;
0029 };
0030 
0031 PFMatchedCandidateRefExtractor::PFMatchedCandidateRefExtractor(const edm::ParameterSet& iConfig)
0032     : col1Token_(consumes<edm::View<reco::Candidate>>(iConfig.getParameter<edm::InputTag>("col1"))),
0033       col2Token_(consumes<edm::View<reco::Candidate>>(iConfig.getParameter<edm::InputTag>("col2"))),
0034       moduleLabel_(iConfig.getParameter<std::string>("@module_label")) {
0035   //register products
0036 
0037   extractPFCands_ = iConfig.getParameter<bool>("extractPFCandidates");
0038 
0039   produces<edm::PtrVector<reco::Candidate>>("col1");
0040   produces<edm::PtrVector<reco::Candidate>>("col2");
0041   if (extractPFCands_) {
0042     pfCandToken_ = mayConsume<edm::View<reco::PFCandidate>>(iConfig.getParameter<edm::InputTag>("pfCandCollection"));
0043     produces<edm::PtrVector<reco::PFCandidate>>("pfCandCol1");
0044     produces<edm::PtrVector<reco::PFCandidate>>("pfCandCol2");
0045   }
0046 }
0047 
0048 PFMatchedCandidateRefExtractor::~PFMatchedCandidateRefExtractor() {}
0049 
0050 // ------------ method called to produce the data  ------------
0051 void PFMatchedCandidateRefExtractor::produce(edm::StreamID iID, edm::Event& iEvent, const edm::EventSetup&) const {
0052   std::unique_ptr<edm::PtrVector<reco::Candidate>> outcol1(new edm::PtrVector<reco::Candidate>());
0053   std::unique_ptr<edm::PtrVector<reco::Candidate>> outcol2(new edm::PtrVector<reco::Candidate>());
0054 
0055   std::unique_ptr<edm::PtrVector<reco::PFCandidate>> outPFCandCol1(new edm::PtrVector<reco::PFCandidate>());
0056   std::unique_ptr<edm::PtrVector<reco::PFCandidate>> outPFCandCol2(new edm::PtrVector<reco::PFCandidate>());
0057 
0058   edm::Handle<edm::View<reco::Candidate>> col1Handle;
0059   edm::Handle<edm::View<reco::Candidate>> col2Handle;
0060   edm::Handle<edm::View<reco::PFCandidate>> pfCandHandle;
0061 
0062   iEvent.getByToken(col1Token_, col1Handle);
0063   iEvent.getByToken(col2Token_, col2Handle);
0064   if (extractPFCands_) {
0065     iEvent.getByToken(pfCandToken_, pfCandHandle);
0066   }
0067 
0068   for (size_t iC1 = 0; iC1 < col1Handle->size(); iC1++) {
0069     for (size_t iC2 = 0; iC2 < col2Handle->size(); iC2++) {
0070       bool matched = (col1Handle->ptrAt(iC1) == col2Handle->ptrAt(iC2));
0071       if (!matched && deltaR2(col1Handle->ptrAt(iC1)->p4(), col2Handle->ptrAt(iC2)->p4()) < 0.000001) {
0072         matched = true;
0073       }
0074 
0075       if (matched) {
0076         outcol1->push_back(col1Handle->ptrAt(iC1));
0077         outcol2->push_back(col2Handle->ptrAt(iC2));
0078 
0079         if (!extractPFCands_)
0080           continue;
0081         std::set<reco::CandidatePtr> sc1s;
0082         std::set<reco::CandidatePtr> sc2s;
0083         for (size_t ics1 = 0; ics1 < col1Handle->ptrAt(iC1)->numberOfSourceCandidatePtrs(); ics1++) {
0084           sc1s.insert(col1Handle->ptrAt(iC1)->sourceCandidatePtr(ics1));
0085         }
0086         for (size_t ics2 = 0; ics2 < col2Handle->ptrAt(iC2)->numberOfSourceCandidatePtrs(); ics2++) {
0087           sc2s.insert(col2Handle->ptrAt(iC2)->sourceCandidatePtr(ics2));
0088         }
0089 
0090         for (size_t ic = 0; ic < pfCandHandle->size(); ++ic) {
0091           reco::PFCandidatePtr c = pfCandHandle->ptrAt(ic);
0092 
0093           bool match1 = (sc1s.find(c) != sc1s.end());
0094           bool match2 = (sc2s.find(c) != sc2s.end());
0095 
0096           if (!match1) {  //recovery when pfcandidate sources are not equivalent
0097             for (size_t ics1 = 0; ics1 < sc1s.size(); ics1++) {
0098               if (deltaR2(c->p4(),
0099                           col1Handle->ptrAt(iC1)->sourceCandidatePtr(ics1)->p4()) <
0100                   0.0000001) {  //tight dR, pfcandidates should be the same
0101                 match1 = true;
0102                 break;
0103               }
0104             }
0105           }
0106           if (!match2) {  //recovery when pfcandidate sources are not equivalent
0107             for (size_t ics2 = 0; ics2 < sc2s.size(); ics2++) {
0108               if (deltaR2(c->p4(),
0109                           col2Handle->ptrAt(iC2)->sourceCandidatePtr(ics2)->p4()) < 0.00001) {  //tight dR
0110                 match2 = true;
0111                 break;
0112               }
0113             }
0114           }
0115 
0116           if (match1) {
0117             outPFCandCol1->push_back(c);
0118           }
0119           if (match2) {
0120             outPFCandCol2->push_back(c);
0121           }
0122         }  //pfcand loop
0123 
0124       }  //matching
0125     }    //col2
0126   }      //col1
0127 
0128   iEvent.put(std::move(outcol1), "col1");
0129   iEvent.put(std::move(outcol2), "col2");
0130   if (extractPFCands_) {
0131     iEvent.put(std::move(outPFCandCol1), "pfCandCol1");
0132     iEvent.put(std::move(outPFCandCol2), "pfCandCol2");
0133   }
0134 }
0135 
0136 //define this as a plug-in
0137 DEFINE_FWK_MODULE(PFMatchedCandidateRefExtractor);