BTagPerformanceAnalyzerMC.cc

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#include "Validation/RecoB/plugins/BTagPerformanceAnalyzerMC.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/Framework/interface/makeRefToBaseProdFrom.h"
#include "DQMOffline/RecoB/interface/TagInfoPlotterFactory.h"

using namespace reco;
using namespace edm;
using namespace std;
using namespace RecoBTag;

typedef std::pair<Jet, reco::JetFlavourInfo> JetWithFlavour;

BTagPerformanceAnalyzerMC::BTagPerformanceAnalyzerMC(const edm::ParameterSet& pSet) :
  jetSelector(
    pSet.getParameter<double>("etaMin"),
    pSet.getParameter<double>("etaMax"),
    pSet.getParameter<double>("ptRecJetMin"),
    pSet.getParameter<double>("ptRecJetMax"),
    0.0, 99999.0,
    pSet.getParameter<double>("ratioMin"),
    pSet.getParameter<double>("ratioMax"),
    pSet.getParameter<bool>( "doJetID" )
  ),
  etaRanges(pSet.getParameter< vector<double> >("etaRanges")),
  ptRanges(pSet.getParameter< vector<double> >("ptRanges")),
  useOldFlavourTool(pSet.getParameter<bool>( "useOldFlavourTool" )),
  doJEC(pSet.getParameter<bool>( "doJEC" )),
  ptHatWeight(pSet.getParameter< bool >("applyPtHatWeight")),
  moduleConfig(pSet.getParameter< vector<edm::ParameterSet> >("tagConfig")),
  flavPlots_(pSet.getParameter< std::string >("flavPlots")),
  jetMatcher(pSet.getParameter<edm::ParameterSet>("recJetMatching")),
  doPUid(pSet.getParameter< bool >("doPUid"))
{
  //mcPlots_ : 1=b+c+l+ni; 2=all+1; 3=1+d+u+s+g; 4=3+all . Default is 2. Don't use 0.
  if(flavPlots_.find("dusg")<15){
    if(flavPlots_.find("all")<15) mcPlots_ = 4;
    else mcPlots_ = 3;
  }
  else{
    if(flavPlots_.find("all")<15) mcPlots_ = 2;
    else mcPlots_ = 1;
  }
  double ptRecJetMin = pSet.getParameter<double>("ptRecJetMin");
  jetMatcher.setThreshold(0.25 * ptRecJetMin);
  switch(pSet.getParameter<unsigned int>("leptonPlots")) {
    case 11: electronPlots = true; muonPlots = false; tauPlots = false; break;
    case 13: muonPlots = true; electronPlots = false; tauPlots = false; break;
    case 15: tauPlots = true; electronPlots = false; tauPlots = false; break;
    default: electronPlots = false; muonPlots = false; tauPlots = false;
  }
  
  genToken = mayConsume<GenEventInfoProduct>(edm::InputTag("generator"));
  genJetsMatchedToken = mayConsume<edm::Association<reco::GenJetCollection>>(pSet.getParameter<InputTag>("genJetsMatched"));
  jetToken = consumes<JetFlavourInfoMatchingCollection>(pSet.getParameter<InputTag>("jetMCSrc"));
  caloJetToken = mayConsume<JetFlavourMatchingCollection>(pSet.getParameter<InputTag>("caloJetMCSrc"));
  slInfoToken = consumes<SoftLeptonTagInfoCollection>(pSet.getParameter<InputTag>("softLeptonInfo"));
  jecMCToken = consumes<JetCorrector>(pSet.getParameter<edm::InputTag>( "JECsourceMC" ));
  jecDataToken = mayConsume<JetCorrector>(pSet.getParameter<edm::InputTag>( "JECsourceData" ));
  for (vector<edm::ParameterSet>::const_iterator iModule = moduleConfig.begin();
       iModule != moduleConfig.end(); ++iModule) {

    const string& dataFormatType = iModule->exists("type") ?
                                   iModule->getParameter<string>("type") :
                                   "JetTag";
    if (dataFormatType == "JetTag") {
      const InputTag& moduleLabel = iModule->getParameter<InputTag>("label");
      jetTagInputTags.push_back(moduleLabel);
      binJetTagPlotters.push_back(vector<JetTagPlotter*>()) ;
      jetTagToken.push_back(consumes<JetTagCollection>(moduleLabel)); 
    } 
    else if(dataFormatType == "TagCorrelation") {
      const InputTag& label1 = iModule->getParameter<InputTag>("label1");
      const InputTag& label2 = iModule->getParameter<InputTag>("label2");
      tagCorrelationInputTags.push_back(std::pair<edm::InputTag, edm::InputTag>(label1, label2));
      binTagCorrelationPlotters.push_back(vector<TagCorrelationPlotter*>());
      tagCorrelationToken.push_back(std::pair< edm::EDGetTokenT<reco::JetTagCollection>, edm::EDGetTokenT<reco::JetTagCollection> >(consumes<JetTagCollection>(label1), consumes<JetTagCollection>(label2)));
    }
    else {
      tagInfoInputTags.push_back(vector<edm::InputTag>());
      tiDataFormatType.push_back(dataFormatType);
      binTagInfoPlotters.push_back(vector<BaseTagInfoPlotter*>()) ;
      std::vector< edm::EDGetTokenT<edm::View<reco::BaseTagInfo>> > tokens; 
      if(dataFormatType == "GenericMVA") {
    const InputTag& ipinfo = iModule->getParameter<InputTag>("ipTagInfos");
    const InputTag& svinfo = iModule->getParameter<InputTag>("svTagInfos");
    tokens.push_back(consumes< View<BaseTagInfo> >(ipinfo));
    tokens.push_back(consumes< View<BaseTagInfo> >(svinfo));
      }
      else {
    const InputTag& moduleLabel = iModule->getParameter<InputTag>("label");
    tokens.push_back(consumes< View<BaseTagInfo> >(moduleLabel));
      }
      tagInfoToken.push_back(tokens);
    }
  }
}

void BTagPerformanceAnalyzerMC::bookHistograms(DQMStore::IBooker & ibook, edm::Run const & run, edm::EventSetup const & es)
{
  //
  // Book all histograms.
  //

  // iterate over ranges:
  const int iEtaStart = -1                   ;  // this will be the inactive one
  const int iEtaEnd   = etaRanges.size() - 1 ;
  const int iPtStart  = -1                   ;  // this will be the inactive one
  const int iPtEnd    = ptRanges.size() - 1  ;
  setTDRStyle();

  TagInfoPlotterFactory theFactory;
  int iTag = -1; int iTagCorr = -1; int iInfoTag = -1;
  for (vector<edm::ParameterSet>::const_iterator iModule = moduleConfig.begin();
       iModule != moduleConfig.end(); ++iModule) {

    const string& dataFormatType = iModule->exists("type") ?
                                   iModule->getParameter<string>("type") :
                                   "JetTag";
    if (dataFormatType == "JetTag") {
      iTag++;
      const string& folderName    = iModule->getParameter<string>("folder");

      // eta loop
      for ( int iEta = iEtaStart ; iEta < iEtaEnd ; iEta++ ) {
    // pt loop
    for ( int iPt = iPtStart ; iPt < iPtEnd ; iPt++ ) {

      const EtaPtBin& etaPtBin = getEtaPtBin(iEta, iPt);

      // Instantiate the genertic b tag plotter
      JetTagPlotter *jetTagPlotter = new JetTagPlotter(folderName, etaPtBin,
                               iModule->getParameter<edm::ParameterSet>("parameters"),mcPlots_,false, ibook);
      binJetTagPlotters.at(iTag).push_back ( jetTagPlotter ) ;

    }
      }
    } else if(dataFormatType == "TagCorrelation") {
        iTagCorr++;
        const InputTag& label1 = iModule->getParameter<InputTag>("label1");
        const InputTag& label2 = iModule->getParameter<InputTag>("label2");

        // eta loop
        for ( int iEta = iEtaStart ; iEta != iEtaEnd ; ++iEta) {
          // pt loop
          for( int iPt = iPtStart ; iPt != iPtEnd ; ++iPt) {
            const EtaPtBin& etaPtBin = getEtaPtBin(iEta, iPt);
            // Instantiate the generic b tag correlation plotter
            TagCorrelationPlotter* tagCorrelationPlotter = new TagCorrelationPlotter(label1.label(), label2.label(), etaPtBin,
                                                                                     iModule->getParameter<edm::ParameterSet>("parameters"),
                                                                                     mcPlots_,  ibook);
            binTagCorrelationPlotters.at(iTagCorr).push_back(tagCorrelationPlotter);
          }
        }
    } else {
      iInfoTag++;
      // tag info retrievel is deferred (needs availability of EventSetup)
      const InputTag& moduleLabel = iModule->getParameter<InputTag>("label");
      const string& folderName    = iModule->getParameter<string>("folder");
      // eta loop
      for ( int iEta = iEtaStart ; iEta < iEtaEnd ; iEta++ ) {
    // pt loop
    for ( int iPt = iPtStart ; iPt < iPtEnd ; iPt++ ) {
      const EtaPtBin& etaPtBin = getEtaPtBin(iEta, iPt);

      // Instantiate the tagInfo plotter

      BaseTagInfoPlotter *jetTagPlotter = theFactory.buildPlotter(dataFormatType, moduleLabel.label(), 
                                      etaPtBin, iModule->getParameter<edm::ParameterSet>("parameters"), folderName, 
                                       mcPlots_,false, ibook);
      binTagInfoPlotters.at(iInfoTag).push_back ( jetTagPlotter ) ;
          binTagInfoPlottersToModuleConfig.insert(make_pair(jetTagPlotter, iModule - moduleConfig.begin()));
    }
      }
    }
  }
}

EtaPtBin BTagPerformanceAnalyzerMC::getEtaPtBin(const int& iEta, const int& iPt)
{
  // DEFINE BTagBin:
  bool    etaActive_ , ptActive_;
  double  etaMin_, etaMax_, ptMin_, ptMax_ ;

  if ( iEta != -1 ) {
    etaActive_ = true ;
    etaMin_    = etaRanges[iEta]   ;
    etaMax_    = etaRanges[iEta+1] ;
  }
  else {
    etaActive_ = false ;
    etaMin_    = etaRanges[0]   ;
    etaMax_    = etaRanges[etaRanges.size() - 1]   ;
  }

  if ( iPt != -1 ) {
    ptActive_ = true ;
    ptMin_    = ptRanges[iPt]   ;
    ptMax_    = ptRanges[iPt+1] ;
  }
  else {
    ptActive_ = false ;
    ptMin_    = ptRanges[0] ;
    ptMax_    = ptRanges[ptRanges.size() - 1]   ;
  }
  return EtaPtBin(etaActive_ , etaMin_ , etaMax_ ,
            ptActive_  , ptMin_  , ptMax_ );
}

BTagPerformanceAnalyzerMC::~BTagPerformanceAnalyzerMC()
{
  for (vector<vector<JetTagPlotter*> >::iterator iJetLabel = binJetTagPlotters.begin();
       iJetLabel != binJetTagPlotters.end(); ++iJetLabel) 
    for (vector<JetTagPlotter*>::iterator iPlotter = iJetLabel->begin(); iPlotter != iJetLabel->end(); ++iPlotter) 
      delete *iPlotter;

  for (vector<vector<TagCorrelationPlotter*> >::iterator iJetLabel = binTagCorrelationPlotters.begin(); 
       iJetLabel != binTagCorrelationPlotters.end(); ++iJetLabel) 
    for (vector<TagCorrelationPlotter* >::iterator iPlotter = iJetLabel->begin(); iPlotter != iJetLabel->end(); ++iPlotter) 
      delete *iPlotter;
  
  for (vector<vector<BaseTagInfoPlotter*> >::iterator iJetLabel = binTagInfoPlotters.begin(); 
       iJetLabel != binTagInfoPlotters.end(); ++iJetLabel) 
    for (vector<BaseTagInfoPlotter*>::iterator iPlotter = iJetLabel->begin(); iPlotter != iJetLabel->end(); ++iPlotter) 
      delete *iPlotter;
    
}

void BTagPerformanceAnalyzerMC::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  eventInitialized = false;

  float weight = 1; // event weight

  if (ptHatWeight) {

    /* APPLY PTHAT EVENT  WEIGHT */

    edm::Handle<GenEventInfoProduct> genInfoHandle;
    iEvent.getByToken(genToken, genInfoHandle);

    if( genInfoHandle.isValid() ) {
      weight = weight*static_cast<float>(genInfoHandle->weight());
    
    }
  }

  LogDebug("Info") << "Event weight is: " << weight;
    
  FlavourMap flavours;
  LeptonMap leptons;


  if(!useOldFlavourTool) {
    edm::Handle<JetFlavourInfoMatchingCollection> jetMC;
    iEvent.getByToken(jetToken, jetMC); 
    for (JetFlavourInfoMatchingCollection::const_iterator iter = jetMC->begin(); 
     iter != jetMC->end(); ++iter) {
      unsigned int fl = std::abs(iter->second.getPartonFlavour());
      flavours.insert(std::make_pair(iter->first, fl));
      const GenParticleRefVector &lep = iter->second.getLeptons();
      reco::JetFlavour::Leptons lepCount;
      for (unsigned int i=0; i<lep.size(); i++){
    if(abs(lep[i]->pdgId())==11) lepCount.electron++;
    else if(abs(lep[i]->pdgId())==13) lepCount.muon++;
    else if(abs(lep[i]->pdgId())==15) lepCount.tau++;
      }
      leptons.insert(std::make_pair(iter->first, lepCount));
    }
  }
  else {
    edm::Handle<JetFlavourMatchingCollection> jetMC;
    iEvent.getByToken(caloJetToken, jetMC); 
    for (JetFlavourMatchingCollection::const_iterator iter = jetMC->begin(); 
     iter != jetMC->end(); ++iter) {
      unsigned int fl = std::abs(iter->second.getFlavour());
      flavours.insert(std::make_pair(iter->first, fl));
      const reco::JetFlavour::Leptons &lep = iter->second.getLeptons();
      leptons.insert(std::make_pair(iter->first, lep));
    }
  }

  edm::Handle<reco::SoftLeptonTagInfoCollection> infoHandle;
  iEvent.getByToken(slInfoToken, infoHandle);

  edm::Handle<edm::Association<reco::GenJetCollection> > genJetsMatched;
  if (doPUid) {
    iEvent.getByToken(genJetsMatchedToken, genJetsMatched);
  }

  //Get JEC
  const JetCorrector* corrector = 0;
  if(doJEC) {
    edm::Handle<GenEventInfoProduct> genInfoHandle; //check if data or MC
    iEvent.getByToken(genToken, genInfoHandle);
    edm::Handle<JetCorrector> corrHandle;
    if( !genInfoHandle.isValid() ) iEvent.getByToken( jecDataToken, corrHandle);
    else iEvent.getByToken( jecMCToken, corrHandle);
    corrector = corrHandle.product();
  }
  //

// Look first at the jetTags
  for (unsigned int iJetLabel = 0; iJetLabel != jetTagInputTags.size(); ++iJetLabel) {
    edm::Handle<reco::JetTagCollection> tagHandle;
    iEvent.getByToken(jetTagToken[iJetLabel], tagHandle); 
    const reco::JetTagCollection & tagColl = *(tagHandle.product());
    LogDebug("Info") << "Found " << tagColl.size() << " B candidates in collection " << jetTagInputTags[iJetLabel];

    int plotterSize =  binJetTagPlotters[iJetLabel].size();
    for (JetTagCollection::const_iterator tagI = tagColl.begin();
     tagI != tagColl.end(); ++tagI) {
      // Identify parton associated to jet.

      if (flavours[tagI->first] == 5 &&
          ((electronPlots && !leptons[tagI->first].electron) ||
           (muonPlots && !leptons[tagI->first].muon) ||
           (tauPlots && !leptons[tagI->first].tau)))
         continue;
      //JEC
      reco::Jet correctedJet = *(tagI->first);
      double jec = 1.0;
      if(doJEC && corrector) {
        jec = corrector->correction(*(tagI->first));
      }

      JetWithFlavour jetWithFlavour;
      if (!getJetWithFlavour(iEvent, tagI->first, flavours, jetWithFlavour, corrector, genJetsMatched))
        continue;
      if (!jetSelector(jetWithFlavour.first, std::abs(jetWithFlavour.second.getPartonFlavour()), infoHandle, jec))
        continue;

      for (int iPlotter = 0; iPlotter != plotterSize; ++iPlotter) {
          bool inBin = false;
          inBin = binJetTagPlotters[iJetLabel][iPlotter]->etaPtBin().inBin(jetWithFlavour.first, jec);
          // Fill histograms if in desired pt/rapidity bin.
          if (inBin)
            binJetTagPlotters[iJetLabel][iPlotter]->analyzeTag(jetWithFlavour.first, jec, tagI->second, std::abs(jetWithFlavour.second.getPartonFlavour()),weight);
      }
    }
    for (int iPlotter = 0; iPlotter != plotterSize; ++iPlotter) {
      binJetTagPlotters[iJetLabel][iPlotter]->analyzeTag(weight);
    }
  }

// Now look at Tag Correlations
  for (unsigned int iJetLabel = 0; iJetLabel != tagCorrelationInputTags.size(); ++iJetLabel) {
    const std::pair< edm::EDGetTokenT<reco::JetTagCollection>, edm::EDGetTokenT<reco::JetTagCollection> >& inputTokens = tagCorrelationToken[iJetLabel];
    edm::Handle<reco::JetTagCollection> tagHandle1;
    iEvent.getByToken(inputTokens.first, tagHandle1); 
    const reco::JetTagCollection& tagColl1 = *(tagHandle1.product());

    edm::Handle<reco::JetTagCollection> tagHandle2;
    iEvent.getByToken(inputTokens.second, tagHandle2);
    const reco::JetTagCollection& tagColl2 = *(tagHandle2.product());

    int plotterSize = binTagCorrelationPlotters[iJetLabel].size();
    for (JetTagCollection::const_iterator tagI = tagColl1.begin(); tagI != tagColl1.end(); ++tagI) {
      
      if (flavours[tagI->first] == 5 &&
          ((electronPlots && !leptons[tagI->first].electron) ||
           (muonPlots && !leptons[tagI->first].muon) ||
           (tauPlots && !leptons[tagI->first].tau)))
        continue;
      
      //JEC
      reco::Jet correctedJet = *(tagI->first);
      double jec = 1.0;
      if(doJEC && corrector) {
        jec = corrector->correction(*(tagI->first));
      }

      JetWithFlavour jetWithFlavour;
      if (!getJetWithFlavour(iEvent, tagI->first, flavours, jetWithFlavour, corrector, genJetsMatched))
        continue;
      if (!jetSelector(jetWithFlavour.first, std::abs(jetWithFlavour.second.getPartonFlavour()), infoHandle, jec))
        continue;

      for(int iPlotter = 0; iPlotter != plotterSize; ++iPlotter) {
        bool inBin = false;
    inBin = binTagCorrelationPlotters[iJetLabel][iPlotter]->etaPtBin().inBin(jetWithFlavour.first, jec);

        if(inBin)
        {
          double discr2 = tagColl2[tagI->first];
          binTagCorrelationPlotters[iJetLabel][iPlotter]->analyzeTags(tagI->second, discr2, std::abs(jetWithFlavour.second.getPartonFlavour()),weight);
        }
      }
    }
  }

// Now look at the TagInfos

  for (unsigned int iJetLabel = 0; iJetLabel != tiDataFormatType.size(); ++iJetLabel) {
    int plotterSize = binTagInfoPlotters[iJetLabel].size();
    for (int iPlotter = 0; iPlotter != plotterSize; ++iPlotter)
      binTagInfoPlotters[iJetLabel][iPlotter]->setEventSetup(iSetup);
    
    vector<edm::InputTag> & inputTags = tagInfoInputTags[iJetLabel];
    if (inputTags.empty()) {
      // deferred retrieval of input tags
      BaseTagInfoPlotter *firstPlotter = binTagInfoPlotters[iJetLabel][0];
      int iModule = binTagInfoPlottersToModuleConfig[firstPlotter];
      vector<string> labels = firstPlotter->tagInfoRequirements();
      if (labels.empty())
        labels.push_back("label");
      for (vector<string>::const_iterator iLabels = labels.begin();
           iLabels != labels.end(); ++iLabels) {
        edm::InputTag inputTag =
            moduleConfig[iModule].getParameter<InputTag>(*iLabels);
        inputTags.push_back(inputTag);
      }
    }
    
    unsigned int nInputTags = inputTags.size();
    vector< edm::Handle< View<BaseTagInfo> > > tagInfoHandles(nInputTags);
    edm::ProductID jetProductID;
    unsigned int nTagInfos = 0;
    vector<edm::EDGetTokenT<edm::View<reco::BaseTagInfo>> > & tokens = tagInfoToken[iJetLabel];
    if(nInputTags!=tokens.size()) throw cms::Exception("Configuration") << "Different number of Tag Infos than expected" << endl;
    for (unsigned int iInputTags = 0; iInputTags < tokens.size(); ++iInputTags) {
      edm::Handle< View<BaseTagInfo> > & tagInfoHandle = tagInfoHandles[iInputTags];
      iEvent.getByToken(tokens[iInputTags], tagInfoHandle); 
      unsigned int size = tagInfoHandle->size();
      LogDebug("Info") << "Found " << size << " B candidates in collection " << inputTags[iInputTags];

      edm::ProductID thisProductID = (size > 0) ? (*tagInfoHandle)[0].jet().id() : edm::ProductID();
      if (iInputTags == 0) {
        jetProductID = thisProductID;
        nTagInfos = size;
      } else if (jetProductID != thisProductID)
        throw cms::Exception("Configuration") << "TagInfos are referencing a different jet collection." << endl;
      else if (nTagInfos != size)
        throw cms::Exception("Configuration") << "TagInfo collections are having a different size." << endl;
    }

    for (unsigned int iTagInfos = 0; iTagInfos < nTagInfos; ++iTagInfos) {
      vector<const BaseTagInfo*> baseTagInfos(nInputTags);
      edm::RefToBase<Jet> jetRef;
      for (unsigned int iTagInfo = 0; iTagInfo < nInputTags; iTagInfo++) {
        const BaseTagInfo &baseTagInfo = (*tagInfoHandles[iTagInfo])[iTagInfos];
        if (iTagInfo == 0)
          jetRef = baseTagInfo.jet();
        else if (baseTagInfo.jet() != jetRef)
          throw cms::Exception("Configuration") << "TagInfos pointing to different jets." << endl;
        baseTagInfos[iTagInfo] = &baseTagInfo;
      }

      // Identify parton associated to jet.

      if (flavours[jetRef] == 5 &&
          ((electronPlots && !leptons[jetRef].electron) ||
           (muonPlots && !leptons[jetRef].muon) ||
           (tauPlots && !leptons[jetRef].tau)))
         continue;
      
      //JEC
      reco::Jet correctedJet = *(jetRef);
      double jec = 1.0;
      if(doJEC && corrector) {
        jec = corrector->correction(*(jetRef));
      }

      JetWithFlavour jetWithFlavour;
      if (!getJetWithFlavour(iEvent, jetRef, flavours, jetWithFlavour, corrector, genJetsMatched))
        continue;
      if (!jetSelector(jetWithFlavour.first, std::abs(jetWithFlavour.second.getPartonFlavour()), infoHandle, jec))
        continue;

      for (int iPlotter = 0; iPlotter != plotterSize; ++iPlotter) {
          bool inBin = false;
          inBin = binTagInfoPlotters[iJetLabel][iPlotter]->etaPtBin().inBin(*jetRef, jec);
          // Fill histograms if in desired pt/rapidity bin.
          if (inBin)
            binTagInfoPlotters[iJetLabel][iPlotter]->analyzeTag(baseTagInfos, jec, std::abs(jetWithFlavour.second.getPartonFlavour()),weight);
      }
    }
  }
}

bool BTagPerformanceAnalyzerMC::getJetWithGenJet(edm::RefToBase<Jet> jetRef, edm::Handle<edm::Association<reco::GenJetCollection> > genJetsMatched)
{
  if(!doPUid) return true;
  reco::GenJetRef genjet = (*genJetsMatched)[jetRef];
  if (genjet.isNonnull() && genjet.isAvailable()) return true;
  return false;
}

bool  BTagPerformanceAnalyzerMC::getJetWithFlavour(const edm::Event& iEvent,
                           edm::RefToBase<Jet> jetRef, const FlavourMap& flavours,
                           JetWithFlavour & jetWithFlavour, const JetCorrector * corrector, 
                           edm::Handle<edm::Association<reco::GenJetCollection> > genJetsMatched)
{
  edm::ProductID recProdId = jetRef.id();
  edm::ProductID refProdId = (flavours.begin() == flavours.end())
    ? recProdId
    : flavours.begin()->first.id();

  if (!eventInitialized) {
    jetCorrector.setCorrector(corrector);
    if (recProdId != refProdId) {
      edm::RefToBaseVector<Jet> refJets;
      for(FlavourMap::const_iterator iter = flavours.begin();
          iter != flavours.end(); ++iter)
        refJets.push_back(iter->first);
      const edm::RefToBaseProd<Jet> recJetsProd(edm::makeRefToBaseProdFrom(jetRef, iEvent));
      edm::RefToBaseVector<Jet> recJets;
      for(unsigned int i = 0; i < recJetsProd->size(); i++)
        recJets.push_back(edm::RefToBase<Jet>(recJetsProd, i));
      jetMatcher.matchCollections(refJets, recJets, corrector);
    }
    eventInitialized = true;
  }

  if (recProdId != refProdId) {
    jetRef = jetMatcher(jetRef);
    if (jetRef.isNull())
      return false;
  }

  jetWithFlavour.first = jetCorrector(*jetRef);

  auto itFound = flavours.find(jetRef);
  unsigned int flavour = itFound != flavours.end()? itFound->second : 0;

  if(doPUid){
    bool isNotPU = getJetWithGenJet(jetRef, genJetsMatched);
    if(!isNotPU) flavour=20;
  }

  jetWithFlavour.second = reco::JetFlavourInfo(flavour, flavour);

  LogTrace("Info") << "Found jet with flavour "<<jetWithFlavour.second.getPartonFlavour()<<endl;
  LogTrace("Info") << jetWithFlavour.first.p()<<" , "<< jetWithFlavour.first.pt()<<" - "<<endl;
    //<< jetWithFlavour.second.getLorentzVector().P()<<" , "<< jetWithFlavour.second.getLorentzVector().Pt()<<endl;

  return true;
}

//define this as a plug-in
DEFINE_FWK_MODULE(BTagPerformanceAnalyzerMC);