PFElectronAlgo.cc

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//
// Original Author: Daniele Benedetti: daniele.benedetti@cern.ch
//

#include "RecoParticleFlow/PFProducer/interface/PFElectronAlgo.h"
#include "RecoParticleFlow/PFProducer/interface/PFMuonAlgo.h"
//#include "DataFormats/ParticleFlowReco/interface/PFBlockElementGsfTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementBrem.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFraction.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFwd.h" 
#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
#include "RecoParticleFlow/PFProducer/interface/PFElectronExtraEqual.h"
#include "RecoParticleFlow/PFProducer/interface/GsfElectronEqual.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFEnergyCalibration.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFSCEnergyCalibration.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFEnergyResolution.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFClusterWidthAlgo.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecTrack.h"
#include "DataFormats/ParticleFlowReco/interface/GsfPFRecTrack.h"
#include "DataFormats/EgammaReco/interface/ElectronSeedFwd.h"
#include "DataFormats/EgammaReco/interface/ElectronSeed.h"

#include <iomanip>
#include <algorithm>

using namespace std;
using namespace reco;
PFElectronAlgo::PFElectronAlgo(const double mvaEleCut,
                   string mvaWeightFileEleID,
                   const boost::shared_ptr<PFSCEnergyCalibration>& thePFSCEnergyCalibration,
                   const boost::shared_ptr<PFEnergyCalibration>& thePFEnergyCalibration,
                   bool applyCrackCorrections,
                   bool usePFSCEleCalib,
                   bool useEGElectrons,
                   bool useEGammaSupercluster,
                   double sumEtEcalIsoForEgammaSC_barrel,
                   double sumEtEcalIsoForEgammaSC_endcap,
                   double coneEcalIsoForEgammaSC,
                   double sumPtTrackIsoForEgammaSC_barrel,
                   double sumPtTrackIsoForEgammaSC_endcap,
                   unsigned int nTrackIsoForEgammaSC,
                   double coneTrackIsoForEgammaSC):
  mvaEleCut_(mvaEleCut),
  thePFSCEnergyCalibration_(thePFSCEnergyCalibration),
  thePFEnergyCalibration_(thePFEnergyCalibration),
  applyCrackCorrections_(applyCrackCorrections),
  usePFSCEleCalib_(usePFSCEleCalib),
  useEGElectrons_(useEGElectrons),
  useEGammaSupercluster_(useEGammaSupercluster),
  sumEtEcalIsoForEgammaSC_barrel_(sumEtEcalIsoForEgammaSC_barrel),
  sumEtEcalIsoForEgammaSC_endcap_(sumEtEcalIsoForEgammaSC_endcap),
  coneEcalIsoForEgammaSC_(coneEcalIsoForEgammaSC),
  sumPtTrackIsoForEgammaSC_barrel_(sumPtTrackIsoForEgammaSC_barrel),
  sumPtTrackIsoForEgammaSC_endcap_(sumPtTrackIsoForEgammaSC_endcap),
  nTrackIsoForEgammaSC_(nTrackIsoForEgammaSC),
  coneTrackIsoForEgammaSC_(coneTrackIsoForEgammaSC)                                
{
  // Set the tmva reader
  tmvaReader_ = new TMVA::Reader("!Color:Silent");
  tmvaReader_->AddVariable("lnPt_gsf",&lnPt_gsf);
  tmvaReader_->AddVariable("Eta_gsf",&Eta_gsf);
  tmvaReader_->AddVariable("dPtOverPt_gsf",&dPtOverPt_gsf);
  tmvaReader_->AddVariable("DPtOverPt_gsf",&DPtOverPt_gsf);
  //tmvaReader_->AddVariable("nhit_gsf",&nhit_gsf);
  tmvaReader_->AddVariable("chi2_gsf",&chi2_gsf);
  //tmvaReader_->AddVariable("DPtOverPt_kf",&DPtOverPt_kf);
  tmvaReader_->AddVariable("nhit_kf",&nhit_kf);
  tmvaReader_->AddVariable("chi2_kf",&chi2_kf);
  tmvaReader_->AddVariable("EtotPinMode",&EtotPinMode);
  tmvaReader_->AddVariable("EGsfPoutMode",&EGsfPoutMode);
  tmvaReader_->AddVariable("EtotBremPinPoutMode",&EtotBremPinPoutMode);
  tmvaReader_->AddVariable("DEtaGsfEcalClust",&DEtaGsfEcalClust);
  tmvaReader_->AddVariable("SigmaEtaEta",&SigmaEtaEta);
  tmvaReader_->AddVariable("HOverHE",&HOverHE);
//   tmvaReader_->AddVariable("HOverPin",&HOverPin);
  tmvaReader_->AddVariable("lateBrem",&lateBrem);
  tmvaReader_->AddVariable("firstBrem",&firstBrem);
  tmvaReader_->BookMVA("BDT",mvaWeightFileEleID.c_str());
}
void PFElectronAlgo::RunPFElectron(const reco::PFBlockRef&  blockRef,
                   std::vector<bool>& active,
                   const reco::Vertex & primaryVertex) {

  // the maps are initialized 
  AssMap associatedToGsf;
  AssMap associatedToBrems;
  AssMap associatedToEcal;

  // should be cleaned as often as often as possible
  elCandidate_.clear();
  electronExtra_.clear();
  allElCandidate_.clear();
  electronConstituents_.clear();
  fifthStepKfTrack_.clear();
  convGsfTrack_.clear();
  // SetLinks finds all the elements (kf,ecal,ps,hcal,brems) 
  // associated to each gsf track
  bool blockHasGSF = SetLinks(blockRef,associatedToGsf,
                  associatedToBrems,associatedToEcal,
                  active, primaryVertex);
  
  // check if there is at least a gsf track in the block. 
  if (blockHasGSF) {
    
    BDToutput_.clear();

    lockExtraKf_.clear();
    // For each GSF track is initialized a BDT value = -1
    BDToutput_.assign(associatedToGsf.size(),-1.);
    lockExtraKf_.assign(associatedToGsf.size(),true);

    // The FinalID is run and BDToutput values is assigned 
    SetIDOutputs(blockRef,associatedToGsf,associatedToBrems,associatedToEcal,primaryVertex);  

    // For each GSF track that pass the BDT configurable cut a pf candidate electron is created. 
    // This function finds also the best estimation of the initial electron 4-momentum.

    SetCandidates(blockRef,associatedToGsf,associatedToBrems,associatedToEcal);
    if (elCandidate_.size() > 0 ){
      isvalid_ = true;
      // when a pfelectron candidate is created all the elements associated to the
      // electron are locked. 
      SetActive(blockRef,associatedToGsf,associatedToBrems,associatedToEcal,active);
    }
  } // endif blockHasGSF
}
bool PFElectronAlgo::SetLinks(const reco::PFBlockRef&  blockRef,
                  AssMap& associatedToGsf_,
                  AssMap& associatedToBrems_,
                  AssMap& associatedToEcal_,     
                  std::vector<bool>& active,
                  const reco::Vertex & primaryVertex) {
  unsigned int CutIndex = 100000;
  double CutGSFECAL = 10000. ;  
  // no other cut are not used anymore. We use the default of PFBlockAlgo
  //PFEnergyCalibration pfcalib_;  
  bool DebugSetLinksSummary = false;
  bool DebugSetLinksDetailed = false;

  const reco::PFBlock& block = *blockRef;
  const edm::OwnVector< reco::PFBlockElement >&  elements = block.elements();
  PFBlock::LinkData linkData =  block.linkData();  
  
  bool IsThereAGSFTrack = false;
  bool IsThereAGoodGSFTrack = false;

  vector<unsigned int> trackIs(0);
  vector<unsigned int> gsfIs(0);
  vector<unsigned int> ecalIs(0);

  std::vector<bool> localactive(elements.size(),true);
 

  // Save the elements in shorter vectors like in PFAlgo.
  std::multimap<double, unsigned int> kfElems;
  for(unsigned int iEle=0; iEle<elements.size(); iEle++) {
    localactive[iEle] = active[iEle];
    bool thisIsAMuon = false;
    PFBlockElement::Type type = elements[iEle].type();
    switch( type ) {
    case PFBlockElement::TRACK:
      // Check if the track is already identified as a muon
      thisIsAMuon =  PFMuonAlgo::isMuon(elements[iEle]);
      // Otherwise store index
      if ( !thisIsAMuon && active[iEle] ) { 
    trackIs.push_back( iEle );
    if (DebugSetLinksDetailed) 
      cout<<"TRACK, stored index, continue "<< iEle << endl;
      }
      continue;
    case PFBlockElement::GSF:
      // Check if the track has a KF partner identified as a muon
      block.associatedElements( iEle,linkData,
                kfElems,
                reco::PFBlockElement::TRACK,
                reco::PFBlock::LINKTEST_ALL );
      thisIsAMuon = kfElems.size() ? 
      PFMuonAlgo::isMuon(elements[kfElems.begin()->second]) : false;
      // Otherwise store index
      if ( !thisIsAMuon && active[iEle] ) { 
    IsThereAGSFTrack = true;    
    gsfIs.push_back( iEle );
    if (DebugSetLinksDetailed) 
      cout<<"GSF, stored index, continue "<< iEle << endl;
      }
      continue;
    case PFBlockElement::ECAL: 
      if ( active[iEle]  ) { 
    ecalIs.push_back( iEle );
    if (DebugSetLinksDetailed) 
      cout<<"ECAL, stored index, continue "<< iEle << endl;
      }
      continue;
    default:
      continue;
    }
  }
  // ******************* Start Link *****************************
  // Do something only if a gsf track is found in the block
  if(IsThereAGSFTrack) {
    

    // LocalLock the Elements associated to a Kf tracks and not to a Gsf
    // The clusters associated both to a kf track and to a brem tangend 
    // are then assigned only to the kf track
    // Could be improved doing this after. 

    // 19 Mar 2010 adding the KF track from Gamma Conv. 
    // They are linked to the GSF tracks they are not considered
    // anymore in the following ecal cluster locking 
    if (DebugSetLinksDetailed) {
      cout<<"#########################################################"<<endl;
      cout<<"#####           Process Block:                      #####"<<endl;
      cout<<"#########################################################"<<endl;
      cout<<block<<endl;
    }      

    
    for(unsigned int iEle=0; iEle<trackIs.size(); iEle++) {
      std::multimap<double, unsigned int> gsfElems;
      block.associatedElements( trackIs[iEle],  linkData,
                gsfElems ,
                reco::PFBlockElement::GSF,
                reco::PFBlock::LINKTEST_ALL );
      if(gsfElems.size() == 0){
    // This means that the considered kf is *not* associated
    // to any gsf track
    std::multimap<double, unsigned int> ecalKfElems;
    block.associatedElements( trackIs[iEle],linkData,
                  ecalKfElems,
                  reco::PFBlockElement::ECAL,
                  reco::PFBlock::LINKTEST_ALL );
    if(ecalKfElems.size() > 0) { 
      unsigned int ecalKf_index = ecalKfElems.begin()->second;
      if(localactive[ecalKf_index]==true) {
        // Check if this clusters is however well linked to a primary gsf track
        // if this the case the cluster is not locked.
        
        bool isGsfLinked = false;
        for(unsigned int iGsf=0; iGsf<gsfIs.size(); iGsf++) {  
          // if the ecal cluster is associated contemporary to a KF track
          // and to a GSF track from conv, it is assigned to the KF track 
          // In this way we can loose some cluster but it is safer for double counting. 
          const reco::PFBlockElementGsfTrack * GsfEl  =  
        dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[gsfIs[iGsf]]));
          if(GsfEl->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)) continue;
          
          std::multimap<double, unsigned int> ecalGsfElems;
          block.associatedElements( gsfIs[iGsf],linkData,
                    ecalGsfElems,
                    reco::PFBlockElement::ECAL,
                    reco::PFBlock::LINKTEST_ALL );
          if(ecalGsfElems.size() > 0) {
        if (ecalGsfElems.begin()->second == ecalKf_index) {
          isGsfLinked = true;
        }
          }
        }
        if(isGsfLinked == false) {
          // add protection against energy loss because
          // of the tracking fifth step
          const reco::PFBlockElementTrack * kfEle =  
        dynamic_cast<const reco::PFBlockElementTrack*>((&elements[(trackIs[iEle])]));   
          reco::TrackRef refKf = kfEle->trackRef();
          
          int nexhits = refKf->hitPattern().numberOfLostHits(HitPattern::MISSING_INNER_HITS);
          
          unsigned int Algo = 0;
          if (refKf.isNonnull()) 
        Algo = refKf->algo(); 
          
          bool trackIsFromPrimaryVertex = false;
          for (Vertex::trackRef_iterator trackIt = primaryVertex.tracks_begin(); trackIt != primaryVertex.tracks_end(); ++trackIt) {
        if ( (*trackIt).castTo<TrackRef>() == refKf ) {
          trackIsFromPrimaryVertex = true;
          break;
        }
          }
          
          if(Algo < 9 && nexhits == 0 && trackIsFromPrimaryVertex) {
        localactive[ecalKf_index] = false;
          } else {
        fifthStepKfTrack_.push_back(make_pair(ecalKf_index,trackIs[iEle]));
          }
        }
      }
    }
      } // gsfElems.size()
    } // loop on kf tracks
    

    // start loop on gsf tracks
    for(unsigned int iEle=0; iEle<gsfIs.size(); iEle++) {  

      if (!localactive[(gsfIs[iEle])]) continue;  

      localactive[gsfIs[iEle]] = false;
      bool ClosestEcalWithKf = false;

      if (DebugSetLinksDetailed) cout << " Gsf Index " << gsfIs[iEle] << endl;

      const reco::PFBlockElementGsfTrack * GsfEl  =  
    dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[(gsfIs[iEle])]));

      // if GsfTrack fron converted bremsstralung continue
      if(GsfEl->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)) continue;
      IsThereAGoodGSFTrack = true;
      float eta_gsf = GsfEl->positionAtECALEntrance().eta();
      float etaOut_gsf = GsfEl->Pout().eta();
      float diffOutEcalEta =  fabs(eta_gsf-etaOut_gsf);
      reco::GsfTrackRef RefGSF = GsfEl->GsftrackRef();
      float Pin_gsf   = 0.01;
      if (RefGSF.isNonnull() ) 
    Pin_gsf = RefGSF->pMode();
      

      // Find Associated Kf Track elements and Ecal to KF elements
      unsigned int KfGsf_index = CutIndex;
      unsigned int KfGsf_secondIndex = CutIndex; 
      std::multimap<double, unsigned int> kfElems;
      block.associatedElements( gsfIs[iEle],linkData,
                kfElems,
                reco::PFBlockElement::TRACK,
                reco::PFBlock::LINKTEST_ALL );
      std::multimap<double, unsigned int> ecalKfElems;
      if (kfElems.size() > 0) {
    // 19 Mar 2010 now a loop is needed because > 1 KF track could
    // be associated to the same GSF track

    for(std::multimap<double, unsigned int>::iterator itkf = kfElems.begin();
        itkf != kfElems.end(); ++itkf) {
      const reco::PFBlockElementTrack * TrkEl  =  
        dynamic_cast<const reco::PFBlockElementTrack*>((&elements[itkf->second]));
      
      bool isPrim = isPrimaryTrack(*TrkEl,*GsfEl);
      if(!isPrim) 
        continue;
      
      if(localactive[itkf->second] == true) {

        KfGsf_index = itkf->second;
        localactive[KfGsf_index] = false;
        // Find clusters associated to kftrack using linkbyrechit
        block.associatedElements( KfGsf_index,  linkData,
                      ecalKfElems ,
                      reco::PFBlockElement::ECAL,
                      reco::PFBlock::LINKTEST_ALL );  
      }
      else {      
        KfGsf_secondIndex = itkf->second;
      }
    }
      }
      
      // Find the closest Ecal clusters associated to this Gsf
      std::multimap<double, unsigned int> ecalGsfElems;
      block.associatedElements( gsfIs[iEle],linkData,
                ecalGsfElems,
                reco::PFBlockElement::ECAL,
                reco::PFBlock::LINKTEST_ALL );    
      double ecalGsf_dist = CutGSFECAL;
      unsigned int ClosestEcalGsf_index = CutIndex;
      if (ecalGsfElems.size() > 0) {    
    if(localactive[(ecalGsfElems.begin()->second)] == true) {
      // check energy compatibility for outer eta != ecal entrance, looping tracks
      bool compatibleEPout = true;
      if(diffOutEcalEta > 0.3) {
        reco::PFClusterRef clusterRef = elements[(ecalGsfElems.begin()->second)].clusterRef();  
        float EoPout = (clusterRef->energy())/(GsfEl->Pout().t());
        if(EoPout > 5) 
          compatibleEPout = false;
      }
      if(compatibleEPout) {
        ClosestEcalGsf_index = ecalGsfElems.begin()->second;
        ecalGsf_dist = block.dist(gsfIs[iEle],ClosestEcalGsf_index,
                      linkData,reco::PFBlock::LINKTEST_ALL);
        
        // Check that this cluster is not closer to another primary Gsf track
        
        std::multimap<double, unsigned int> ecalOtherGsfElems;
        block.associatedElements( ClosestEcalGsf_index,linkData,
                      ecalOtherGsfElems,
                      reco::PFBlockElement::GSF,
                      reco::PFBlock::LINKTEST_ALL);
        
        if(ecalOtherGsfElems.size()>0) {
          // get if it is closed to a conv brem gsf tracks
          const reco::PFBlockElementGsfTrack * gsfCheck  =  
        dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[ecalOtherGsfElems.begin()->second]));
          
          if(ecalOtherGsfElems.begin()->second != gsfIs[iEle]&&
         gsfCheck->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) == false) {         
        ecalGsf_dist = CutGSFECAL;
        ClosestEcalGsf_index = CutIndex;
          }
        }
      }
      // do not lock at the moment we need this for the late brem
    }
      }
      // if any cluster is found with the gsf-ecal link, try with kf-ecal
      else if(ecalKfElems.size() > 0) {
    if(localactive[(ecalKfElems.begin()->second)] == true) {
      ClosestEcalGsf_index = ecalKfElems.begin()->second;     
      ecalGsf_dist = block.dist(gsfIs[iEle],ClosestEcalGsf_index,
                    linkData,reco::PFBlock::LINKTEST_ALL);
      ClosestEcalWithKf = true;
      
      // Check if this cluster is not closer to another Gsf track
      std::multimap<double, unsigned int> ecalOtherGsfElems;
      block.associatedElements( ClosestEcalGsf_index,linkData,
                    ecalOtherGsfElems,
                    reco::PFBlockElement::GSF,
                    reco::PFBlock::LINKTEST_ALL);
      if(ecalOtherGsfElems.size() > 0) {
        const reco::PFBlockElementGsfTrack * gsfCheck  =  
          dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[ecalOtherGsfElems.begin()->second]));

        if(ecalOtherGsfElems.begin()->second != gsfIs[iEle] &&
           gsfCheck->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) == false) {
          ecalGsf_dist = CutGSFECAL;
          ClosestEcalGsf_index = CutIndex;
          ClosestEcalWithKf = false;
        }
      }
    }
      }

      if (DebugSetLinksDetailed) 
    cout << " Closest Ecal to the Gsf/Kf: index " << ClosestEcalGsf_index 
         << " dist " << ecalGsf_dist << endl;
      
      
      
      //  Find the brems associated to this Gsf
      std::multimap<double, unsigned int> bremElems;
      block.associatedElements( gsfIs[iEle],linkData,
                bremElems,
                reco::PFBlockElement::BREM,
                reco::PFBlock::LINKTEST_ALL );
      
      
      multimap<unsigned int,unsigned int> cleanedEcalBremElems;
      vector<unsigned int> keyBremIndex(0);
      unsigned int latestBrem_trajP = 0;     
      unsigned int latestBrem_index = CutIndex;
      for(std::multimap<double, unsigned int>::iterator ieb = bremElems.begin(); 
      ieb != bremElems.end(); ++ieb ) {
    unsigned int brem_index = ieb->second;
    if(localactive[brem_index] == false) continue;


    // Find the ecal clusters associated to the brems
    std::multimap<double, unsigned int> ecalBremsElems;

    block.associatedElements( brem_index,  linkData,
                  ecalBremsElems,
                  reco::PFBlockElement::ECAL,
                  reco::PFBlock::LINKTEST_ALL );

    for (std::multimap<double, unsigned int>::iterator ie = ecalBremsElems.begin();
         ie != ecalBremsElems.end();ie++) {
      unsigned int ecalBrem_index = ie->second;
      if(localactive[ecalBrem_index] == false) continue;

      //to be changed, using the distance
      float ecalBrem_dist = block.dist(brem_index,ecalBrem_index,
                       linkData,reco::PFBlock::LINKTEST_ALL); 
      
      
      if (ecalBrem_index == ClosestEcalGsf_index && (ecalBrem_dist + 0.0012) > ecalGsf_dist) continue;

      // Find the closest brem
      std::multimap<double, unsigned int> sortedBremElems;
      block.associatedElements( ecalBrem_index,linkData,
                    sortedBremElems,
                    reco::PFBlockElement::BREM,
                    reco::PFBlock::LINKTEST_ALL);
      // check that this brem is that one coming from the same *primary* gsf
      bool isGoodBrem = false;
      unsigned int sortedBrem_index =  CutIndex;
      for (std::multimap<double, unsigned int>::iterator ibs = sortedBremElems.begin();
           ibs != sortedBremElems.end();ibs++) {
        unsigned int temp_sortedBrem_index = ibs->second;
        std::multimap<double, unsigned int> sortedGsfElems;
        block.associatedElements( temp_sortedBrem_index,linkData,
                      sortedGsfElems,
                      reco::PFBlockElement::GSF,
                      reco::PFBlock::LINKTEST_ALL);
        bool enteredInPrimaryGsf = false;
        for (std::multimap<double, unsigned int>::iterator igs = sortedGsfElems.begin();
         igs != sortedGsfElems.end();igs++) {
          const reco::PFBlockElementGsfTrack * gsfCheck  =  
        dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[igs->second]));

          if(gsfCheck->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) == false) {
        if(igs->second ==  gsfIs[iEle]) {
          isGoodBrem = true;
          sortedBrem_index = temp_sortedBrem_index;
        }
        enteredInPrimaryGsf = true;
        break;
          }
        }
        if(enteredInPrimaryGsf)
          break;
      }

      if(isGoodBrem) { 

        //  Check that this cluster is not closer to another Gsf Track
        // The check is not performed on KF track because the ecal clusters are aready locked.
        std::multimap<double, unsigned int> ecalOtherGsfElems;
        block.associatedElements( ecalBrem_index,linkData,
                      ecalOtherGsfElems,
                      reco::PFBlockElement::GSF,
                      reco::PFBlock::LINKTEST_ALL);
        if (ecalOtherGsfElems.size() > 0) {
          const reco::PFBlockElementGsfTrack * gsfCheck  =  
        dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[ecalOtherGsfElems.begin()->second]));
          if(ecalOtherGsfElems.begin()->second != gsfIs[iEle] &&
         gsfCheck->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) == false) {
        continue;
          }
        }

        const reco::PFBlockElementBrem * BremEl  =  
          dynamic_cast<const reco::PFBlockElementBrem*>((&elements[sortedBrem_index]));

        reco::PFClusterRef clusterRef = 
          elements[ecalBrem_index].clusterRef();
        

        float sortedBremEcal_deta = fabs(clusterRef->position().eta() - BremEl->positionAtECALEntrance().eta());
        // Triangular cut on plan chi2:deta -> OLD
        //if((0.0075*sortedBremEcal_chi2 + 100.*sortedBremEcal_deta -1.5) < 0.) {
        if(sortedBremEcal_deta < 0.015) {
        
          cleanedEcalBremElems.insert(pair<unsigned int,unsigned int>(sortedBrem_index,ecalBrem_index));
          
          unsigned int BremTrajP = BremEl->indTrajPoint();
          if (BremTrajP > latestBrem_trajP) {
        latestBrem_trajP = BremTrajP;
        latestBrem_index = sortedBrem_index;
          }
          if (DebugSetLinksDetailed)
        cout << " brem Index " <<  sortedBrem_index 
             << " associated cluster " << ecalBrem_index << " BremTrajP " << BremTrajP <<endl;
          
          // > 1 ecal clusters could be associated to the same brem twice: allowed N-1 link. 
          // But the brem need to be stored once. 
          // locallock the brem and the ecal clusters
          localactive[ecalBrem_index] = false;  // the cluster
          bool  alreadyfound = false;
          for(unsigned int ii=0;ii<keyBremIndex.size();ii++) {
        if (sortedBrem_index == keyBremIndex[ii]) alreadyfound = true;
          }
          if (alreadyfound == false) {
        keyBremIndex.push_back(sortedBrem_index);
        localactive[sortedBrem_index] = false;   // the brem
          }
        }
      }
    }
      }

      
      // Find Possible Extra Cluster associated to the gsf/kf
      vector<unsigned int> GsfElemIndex(0);
      vector<unsigned int> EcalIndex(0);

      // locallock the ecal cluster associated to the gsf
      if (ClosestEcalGsf_index < CutIndex) {
    GsfElemIndex.push_back(ClosestEcalGsf_index);
    localactive[ClosestEcalGsf_index] = false;
    for (std::multimap<double, unsigned int>::iterator ii = ecalGsfElems.begin();
         ii != ecalGsfElems.end();ii++) {   
      if(localactive[ii->second]) {
        // Check that this cluster is not closer to another Gsf Track
        std::multimap<double, unsigned int> ecalOtherGsfElems;
        block.associatedElements( ii->second,linkData,
                      ecalOtherGsfElems,
                      reco::PFBlockElement::GSF,
                      reco::PFBlock::LINKTEST_ALL);
        if(ecalOtherGsfElems.size()) {
          if(ecalOtherGsfElems.begin()->second != gsfIs[iEle]) continue;
        } 
        
        // get the cluster only if the deta (ecal-gsf) < 0.05
        reco::PFClusterRef clusterRef = elements[(ii->second)].clusterRef();
        float etacl =  clusterRef->eta();
        if( fabs(eta_gsf-etacl) < 0.05) {       
          GsfElemIndex.push_back(ii->second);
          localactive[ii->second] = false;
          if (DebugSetLinksDetailed)
        cout << " ExtraCluster From Gsf " << ii->second << endl;
        }
      }
    }
      }

      //Add the possibility to link other ecal clusters from kf. 
     
//       for (std::multimap<double, unsigned int>::iterator ii = ecalKfElems.begin();
//     ii != ecalKfElems.end();ii++) {
//  if(localactive[ii->second]) {
//         // Check that this cluster is not closer to another Gsf Track    
//    std::multimap<double, unsigned int> ecalOtherGsfElems;
//    block.associatedElements( ii->second,linkData,
//                  ecalOtherGsfElems,
//                  reco::PFBlockElement::GSF,
//                  reco::PFBlock::LINKTEST_CHI2);
//    if(ecalOtherGsfElems.size()) {
//      if(ecalOtherGsfElems.begin()->second != gsfIs[iEle]) continue;
//    } 
//    GsfElemIndex.push_back(ii->second);
//    reco::PFClusterRef clusterRef = elements[(ii->second)].clusterRef();
//    float etacl =  clusterRef->eta();
//    if( fabs(eta_gsf-etacl) < 0.05) {     
//      localactive[ii->second] = false;
//      if (DebugSetLinksDetailed)
//        cout << " ExtraCluster From KF " << ii->second << endl;
//    }
//  }
//       }
      
      //****************** Fill Maps *************************

      // The GsfMap    

      // if any clusters have been associated to the gsf track    
      // use the Ecal clusters associated to the latest brem and associate it to the gsf
       if(GsfElemIndex.size() == 0){
    if(latestBrem_index < CutIndex) {
      unsigned int ckey = cleanedEcalBremElems.count(latestBrem_index);
      if(ckey == 1) {
        unsigned int temp_cal = 
          cleanedEcalBremElems.find(latestBrem_index)->second;
        GsfElemIndex.push_back(temp_cal);
        if (DebugSetLinksDetailed)
          cout << "******************** Gsf Cluster From Brem " << temp_cal 
           << " Latest Brem index " << latestBrem_index 
           << " ************************* " << endl;
      }
      else{
        pair<multimap<unsigned int,unsigned int>::iterator,multimap<unsigned int,unsigned int>::iterator> ret;
        ret = cleanedEcalBremElems.equal_range(latestBrem_index);
        multimap<unsigned int,unsigned int>::iterator it;
        for(it=ret.first; it!=ret.second; ++it) {
          GsfElemIndex.push_back((*it).second);
          if (DebugSetLinksDetailed)
        cout << "******************** Gsf Cluster From Brem " << (*it).second 
             << " Latest Brem index " << latestBrem_index 
             << " ************************* " << endl;
        }
      }
      // erase the brem. 
      unsigned int elToErase = 0;
      for(unsigned int i = 0; i<keyBremIndex.size();i++) {
        if(latestBrem_index == keyBremIndex[i]) {
          elToErase = i;
        }
      }
      keyBremIndex.erase(keyBremIndex.begin()+elToErase);
    }   
      }

      // Get Extra Clusters from converted brem gsf tracks. The locallock method
      // tells me if the ecal cluster has been already assigned to the primary
      // gsf track or to a brem

      for(unsigned int iConv=0; iConv<gsfIs.size(); iConv++) {  
    if(iConv != iEle) {

      const reco::PFBlockElementGsfTrack * gsfConv  =  
        dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[(gsfIs[iConv])]));
      
      // look at only to secondary gsf tracks
      if(gsfConv->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)){
        if (DebugSetLinksDetailed)
          cout << "  PFElectronAlgo:: I'm running on convGsfBrem " << endl;
        // check if they are linked to the primary
        float conv_dist = block.dist(gsfIs[iConv],gsfIs[iEle],
                     linkData,reco::PFBlock::LINKTEST_ALL);
        if(conv_dist > 0.) {
          // find the closest ecal cluster associated to conversions

          std::multimap<double, unsigned int> ecalConvElems;
          block.associatedElements( gsfIs[iConv],linkData,
                    ecalConvElems,
                    reco::PFBlockElement::ECAL,
                    reco::PFBlock::LINKTEST_ALL );    
          if(ecalConvElems.size() > 0) {
        // the ecal cluster is still active?
        if(localactive[(ecalConvElems.begin()->second)] == true) {
          if (DebugSetLinksDetailed)
            cout << "  PFElectronAlgo:: convGsfBrem has a ECAL cluster linked and free" << endl;
          // Check that this cluster is not closer to another primary Gsf track
          std::multimap<double, unsigned int> ecalOtherGsfPrimElems;
          block.associatedElements( ecalConvElems.begin()->second,linkData,
                        ecalOtherGsfPrimElems,
                        reco::PFBlockElement::GSF,
                        reco::PFBlock::LINKTEST_ALL);
          if(ecalOtherGsfPrimElems.size()>0) {
            unsigned int gsfprimcheck_index = ecalOtherGsfPrimElems.begin()->second;
            const reco::PFBlockElementGsfTrack * gsfCheck  =  
              dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[gsfprimcheck_index]));
            if(gsfCheck->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) == false) continue;
            
            reco::PFClusterRef clusterRef = elements[ecalConvElems.begin()->second].clusterRef();
            if (DebugSetLinksDetailed)
              cout << " PFElectronAlgo: !!!!!!! convGsfBrem ECAL cluster has been stored !!!!!!! "
               << " Energy " << clusterRef->energy() << " eta,phi "  << clusterRef->position().eta()
               <<", " <<  clusterRef->position().phi() << endl;
         
            GsfElemIndex.push_back(ecalConvElems.begin()->second);
            convGsfTrack_.push_back(make_pair(ecalConvElems.begin()->second,gsfIs[iConv]));
            localactive[ecalConvElems.begin()->second] = false;
            
          }
        }
          }
        }
      }
    }
      }


      
      EcalIndex.insert(EcalIndex.end(),GsfElemIndex.begin(),GsfElemIndex.end());
      
      

      // The BremMap
      for(unsigned int i =0;i<keyBremIndex.size();i++) {
    unsigned int ikey = keyBremIndex[i];
    unsigned int ckey = cleanedEcalBremElems.count(ikey);
    vector<unsigned int> BremElemIndex(0);
    if(ckey == 1) {
      unsigned int temp_cal = 
        cleanedEcalBremElems.find(ikey)->second;
      BremElemIndex.push_back(temp_cal);
    }
    else{
      pair<multimap<unsigned int,unsigned int>::iterator,multimap<unsigned int,unsigned int>::iterator> ret;
      ret = cleanedEcalBremElems.equal_range(ikey);
      multimap<unsigned int,unsigned int>::iterator it;
      for(it=ret.first; it!=ret.second; ++it) {
        BremElemIndex.push_back((*it).second);
      }
    }
    EcalIndex.insert(EcalIndex.end(),BremElemIndex.begin(),BremElemIndex.end());
    associatedToBrems_.insert(pair<unsigned int,vector<unsigned int> >(ikey,BremElemIndex));
      }

      
      // 19 Mar 2010: add KF and ECAL elements from converted brem photons
      vector<unsigned int> convBremKFTrack;
      convBremKFTrack.clear();
      if (kfElems.size() > 0) {
    for(std::multimap<double, unsigned int>::iterator itkf = kfElems.begin();
        itkf != kfElems.end(); ++itkf) {
      const reco::PFBlockElementTrack * TrkEl  =  
        dynamic_cast<const reco::PFBlockElementTrack*>((&elements[itkf->second]));
      bool isPrim = isPrimaryTrack(*TrkEl,*GsfEl);

      if(!isPrim) {

        // search for linked ECAL clusters
        std::multimap<double, unsigned int> ecalConvElems;
        block.associatedElements( itkf->second,linkData,
                      ecalConvElems,
                      reco::PFBlockElement::ECAL,
                      reco::PFBlock::LINKTEST_ALL );
        if(ecalConvElems.size() > 0) {
          // Further Cleaning: DANIELE This could be improved!
          TrackRef trkRef =   TrkEl->trackRef();
          // iter0, iter1, iter2, iter3 = Algo < 3
          unsigned int Algo = whichTrackAlgo(trkRef);

          float secpin = trkRef->p();   
          
          const reco::PFBlockElementCluster * clust =  
        dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(ecalConvElems.begin()->second)])); 
          float eneclust  =clust->clusterRef()->energy();

          //1)  ******* Reject secondary KF tracks linked to also an HCAL cluster with H/(E+H) > 0.1
          //            This is applied also to KF linked to locked ECAL cluster
          //            NOTE: trusting the H/(E+H) and not the conv brem selection increse the number
          //                  of charged hadrons around the electron. DANIELE? re-think about this. 
          std::multimap<double, unsigned int> hcalConvElems;
          block.associatedElements( itkf->second,linkData,
                    hcalConvElems,
                    reco::PFBlockElement::HCAL,
                    reco::PFBlock::LINKTEST_ALL );

          bool isHoHE = false;
          bool isHoE = false;
          bool isPoHE = false;

          float enehcalclust = -1;
          if(hcalConvElems.size() > 0) {
        const reco::PFBlockElementCluster * clusthcal =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(hcalConvElems.begin()->second)])); 
        enehcalclust  =clusthcal->clusterRef()->energy();
        // NOTE: DANIELE? Are you sure you want to use the Algo type here? 
        if( (enehcalclust / (enehcalclust+eneclust) ) > 0.1 && Algo < 3) {
          isHoHE = true;
          if(enehcalclust > eneclust) 
            isHoE = true;
          if(secpin > (enehcalclust+eneclust) )
            isPoHE = true;
        }
          }
          

          if(localactive[(ecalConvElems.begin()->second)] == false) {
        
        if(isHoE || isPoHE) {
          if (DebugSetLinksDetailed)
            cout << "PFElectronAlgo:: LOCKED ECAL REJECTED TRACK FOR H/E or P/(H+E) "
             << " H/H+E " << enehcalclust/(enehcalclust+eneclust)             
             << " H/E " <<  enehcalclust/eneclust
             << " P/(H+E) " << secpin/(enehcalclust+eneclust) 
             << " HCAL ENE " << enehcalclust 
             << " ECAL ENE " << eneclust 
             << " secPIN " << secpin 
             << " Algo Track " << Algo << endl;
          continue;
        }

        // check if this track has been alread assigned to an ECAL cluster
        for(unsigned int iecal =0; iecal < EcalIndex.size(); iecal++) {
          // in case this track is already assigned to a locked ECAL cluster
          // the secondary kf track is also saved for further lock
          if(EcalIndex[iecal] == ecalConvElems.begin()->second) {
            if (DebugSetLinksDetailed)
              cout << " PFElectronAlgo:: Conv Brem Recovery locked cluster and I will lock also the KF track " << endl; 
            convBremKFTrack.push_back(itkf->second);
          }
        }
          }       
          else{
        // ECAL cluster free
        
        // 
        if(isHoHE){
          if (DebugSetLinksDetailed)
            cout << "PFElectronAlgo:: FREE ECAL REJECTED TRACK FOR H/H+E " 
             << " H/H+E " <<  (enehcalclust / (enehcalclust+eneclust) ) 
             << " H/E " <<  enehcalclust/eneclust
             << " P/(H+E) " << secpin/(enehcalclust+eneclust) 
             << " HCAL ENE " << enehcalclust 
             << " ECAL ENE " << eneclust 
             << " secPIN " << secpin 
             << " Algo Track " << Algo << endl;
          continue;
        }

        // check that this cluster is not cluser to another KF track (primary)
        std::multimap<double, unsigned int> ecalOtherKFPrimElems;
        block.associatedElements( ecalConvElems.begin()->second,linkData,
                      ecalOtherKFPrimElems,
                      reco::PFBlockElement::TRACK,
                      reco::PFBlock::LINKTEST_ALL);
        if(ecalOtherKFPrimElems.size() > 0) {
          
          // check that this ECAL clusters is the best associated to at least one of the  KF tracks
          // linked to the considered GSF track
          bool isFromGSF = false;
          for(std::multimap<double, unsigned int>::iterator itclos = kfElems.begin();
              itclos != kfElems.end(); ++itclos) {
            if(ecalOtherKFPrimElems.begin()->second == itclos->second) {
              isFromGSF = true;
              break;
            }
          }
          if(isFromGSF){

            // Further Cleaning: DANIELE This could be improved!                        
          
                          
            float Epin = eneclust/secpin;
            
            // compute the pfsupercluster energy till now
            float totenergy = 0.;
            for(unsigned int ikeyecal = 0; 
            ikeyecal<EcalIndex.size(); ikeyecal++){
              // EcalIndex can have the same cluster save twice (because of the late brem cluster).
              bool foundcluster = false;
              if(ikeyecal > 0) {
            for(unsigned int i2 = 0; i2<ikeyecal-1; i2++) {
              if(EcalIndex[ikeyecal] == EcalIndex[i2]) 
                foundcluster = true;
            }
              }
              if(foundcluster) continue;
              const reco::PFBlockElementCluster * clusasso =  
            dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(EcalIndex[ikeyecal])])); 
              totenergy += clusasso->clusterRef()->energy();
            }
            
            // Further Cleaning: DANIELE This could be improved! 
            //2) *****  Do not consider secondary tracks if the GSF and brems have failed in finding ECAL clusters
            if(totenergy == 0.) {
              if (DebugSetLinksDetailed)
            cout << "PFElectronAlgo:: REJECTED_NULLTOT totenergy " << totenergy << endl;
              continue;
            }
            
            //3) ****** Reject secondary KF tracks that have an high E/secPin and that make worse the Etot/pin 
            if(Epin > 3) {
              double res_before = fabs((totenergy-Pin_gsf)/Pin_gsf);
              double res_after = fabs(((totenergy+eneclust)-Pin_gsf)/Pin_gsf);
              
              if(res_before < res_after) {
            if (DebugSetLinksDetailed)
              cout << "PFElectronAlgo::REJECTED_RES totenergy " << totenergy << " Pin_gsf " << Pin_gsf << " cluster to secondary " <<  eneclust 
                   << " Res before " <<  res_before << " res_after " << res_after << endl;
            continue;
              }
            }
            
            if (DebugSetLinksDetailed)
              cout << "PFElectronAlgo:: conv brem found asso to ECAL linked to a secondary KF " << endl;
            convBremKFTrack.push_back(itkf->second);
            GsfElemIndex.push_back(ecalConvElems.begin()->second);
            EcalIndex.push_back(ecalConvElems.begin()->second);
            localactive[(ecalConvElems.begin()->second)] = false;
            localactive[(itkf->second)] = false;
          }
        }
          }
        }
      }
    }
      }
 
      // 4May import EG supercluster
      if(EcalIndex.size() > 0 && useEGammaSupercluster_) {
    double sumEtEcalInTheCone  = 0.;
    
    // Position of the first cluster
    const reco::PFBlockElementCluster * clust =  
      dynamic_cast<const reco::PFBlockElementCluster*>((&elements[EcalIndex[0]])); 
    double PhiFC  = clust->clusterRef()->position().Phi();
    double EtaFC =  clust->clusterRef()->position().Eta();

    // Compute ECAL isolation ->
    for(unsigned int iEcal=0; iEcal<ecalIs.size(); iEcal++) {
      bool foundcluster = false;
      for(unsigned int ikeyecal = 0; 
          ikeyecal<EcalIndex.size(); ikeyecal++){
        if(ecalIs[iEcal] == EcalIndex[ikeyecal])
          foundcluster = true;
      }
      
      // -> only for clusters not already in the PFSCCluster
      if(foundcluster == false) {
        const reco::PFBlockElementCluster * clustExt =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[ecalIs[iEcal]])); 
        double eta_clust =  clustExt->clusterRef()->position().Eta();
        double phi_clust =  clustExt->clusterRef()->position().Phi();
        double theta_clust =  clustExt->clusterRef()->position().Theta();
        double deta_clust = eta_clust - EtaFC;
        double dphi_clust = phi_clust - PhiFC;
        if ( dphi_clust < -M_PI ) 
          dphi_clust = dphi_clust + 2.*M_PI;
        else if ( dphi_clust > M_PI ) 
          dphi_clust = dphi_clust - 2.*M_PI;
        double  DR = sqrt(deta_clust*deta_clust+
                  dphi_clust*dphi_clust);         
        
        //Jurassic veto in deta
        if(fabs(deta_clust) > 0.05 && DR < coneEcalIsoForEgammaSC_) {
          vector<double> ps1Ene(0);
          vector<double> ps2Ene(0);
          double ps1,ps2;
          ps1=ps2=0.;
          double EE_calib = thePFEnergyCalibration_->energyEm(*(clustExt->clusterRef()),ps1Ene,ps2Ene,ps1,ps2,applyCrackCorrections_);
          double ET_calib = EE_calib*sin(theta_clust);
          sumEtEcalInTheCone += ET_calib;
        }
      }
    } //EndLoop Additional ECAL clusters in the block
    
    // Compute track isolation: number of tracks && sumPt
    unsigned int sumNTracksInTheCone = 0;
    double sumPtTracksInTheCone = 0.;
    for(unsigned int iTrack=0; iTrack<trackIs.size(); iTrack++) {
      // the track from the electron are already locked at this stage
      if(localactive[(trackIs[iTrack])]==true) {
        const reco::PFBlockElementTrack * kfEle =  
          dynamic_cast<const reco::PFBlockElementTrack*>((&elements[(trackIs[iTrack])]));   
        reco::TrackRef trkref = kfEle->trackRef();
        if (trkref.isNonnull()) {
          double deta_trk =  trkref->eta() - RefGSF->etaMode();
          double dphi_trk =  trkref->phi() - RefGSF->phiMode();
          if ( dphi_trk < -M_PI ) 
        dphi_trk = dphi_trk + 2.*M_PI;
          else if ( dphi_trk > M_PI ) 
        dphi_trk = dphi_trk - 2.*M_PI;
          double  DR = sqrt(deta_trk*deta_trk+
                dphi_trk*dphi_trk);
          
          int NValPixelHit = trkref->hitPattern().numberOfValidPixelHits();
          
          if(DR < coneTrackIsoForEgammaSC_ && NValPixelHit >=3) {
        sumNTracksInTheCone++;
        sumPtTracksInTheCone+=trkref->pt();
          }
        }
      }
    }

    
    bool isBarrelIsolated = false;
    if( fabs(EtaFC < 1.478) && 
        (sumEtEcalInTheCone < sumEtEcalIsoForEgammaSC_barrel_ && 
         (sumNTracksInTheCone < nTrackIsoForEgammaSC_  || sumPtTracksInTheCone < sumPtTrackIsoForEgammaSC_barrel_)))
      isBarrelIsolated = true;
    
    
    bool isEndcapIsolated = false;
    if( fabs(EtaFC >= 1.478) && 
        (sumEtEcalInTheCone < sumEtEcalIsoForEgammaSC_endcap_ &&  
         (sumNTracksInTheCone < nTrackIsoForEgammaSC_  || sumPtTracksInTheCone < sumPtTrackIsoForEgammaSC_endcap_)))
      isEndcapIsolated = true;
    

    // only print out
    if(DebugSetLinksDetailed) {
      if(fabs(EtaFC < 1.478) && isBarrelIsolated == false) {
        cout << "**** PFElectronAlgo:: SUPERCLUSTER FOUND BUT FAILS ISOLATION:BARREL *** " 
         << " sumEtEcalInTheCone " <<sumEtEcalInTheCone 
         << " sumNTracksInTheCone " << sumNTracksInTheCone 
         << " sumPtTracksInTheCone " << sumPtTracksInTheCone << endl;
      }
      if(fabs(EtaFC >= 1.478) && isEndcapIsolated == false) {
        cout << "**** PFElectronAlgo:: SUPERCLUSTER FOUND BUT FAILS ISOLATION:ENDCAP *** " 
         << " sumEtEcalInTheCone " <<sumEtEcalInTheCone 
         << " sumNTracksInTheCone " << sumNTracksInTheCone 
         << " sumPtTracksInTheCone " << sumPtTracksInTheCone << endl;
      }
    }



    
    if(isBarrelIsolated || isEndcapIsolated ) {
      
      
      // Compute TotEnergy
      double totenergy = 0.;
      for(unsigned int ikeyecal = 0; 
          ikeyecal<EcalIndex.size(); ikeyecal++){
        // EcalIndex can have the same cluster save twice (because of the late brem cluster).
        bool foundcluster = false;
        if(ikeyecal > 0) {
          for(unsigned int i2 = 0; i2<ikeyecal-1; i2++) {
        if(EcalIndex[ikeyecal] == EcalIndex[i2]) 
          foundcluster = true;;
          }
        }
        if(foundcluster) continue;
        const reco::PFBlockElementCluster * clusasso =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(EcalIndex[ikeyecal])])); 
        totenergy += clusasso->clusterRef()->energy();
      }
      // End copute TotEnergy


      // Find extra cluster from e/g importing
      for(unsigned int ikeyecal = 0; 
          ikeyecal<EcalIndex.size(); ikeyecal++){
        // EcalIndex can have the same cluster save twice (because of the late brem cluster).
        bool foundcluster = false;
        if(ikeyecal > 0) {
          for(unsigned int i2 = 0; i2<ikeyecal-1; i2++) {
        if(EcalIndex[ikeyecal] == EcalIndex[i2]) 
          foundcluster = true;
          }
        }     
        if(foundcluster) continue;
        
        
        std::multimap<double, unsigned int> ecalFromSuperClusterElems;
        block.associatedElements( EcalIndex[ikeyecal],linkData,
                      ecalFromSuperClusterElems,
                      reco::PFBlockElement::ECAL,
                      reco::PFBlock::LINKTEST_ALL);
        if(ecalFromSuperClusterElems.size() > 0) {
          for(std::multimap<double, unsigned int>::iterator itsc = ecalFromSuperClusterElems.begin();
          itsc != ecalFromSuperClusterElems.end(); ++itsc) {
        if(localactive[itsc->second] == false) {
          continue;
        }
        
        std::multimap<double, unsigned int> ecalOtherKFPrimElems;
        block.associatedElements( itsc->second,linkData,
                      ecalOtherKFPrimElems,
                      reco::PFBlockElement::TRACK,
                      reco::PFBlock::LINKTEST_ALL);
        if(ecalOtherKFPrimElems.size() > 0) {
          if(localactive[ecalOtherKFPrimElems.begin()->second] == true) {
            if (DebugSetLinksDetailed)
              cout << "**** PFElectronAlgo:: SUPERCLUSTER FOUND BUT FAILS KF VETO *** " << endl;
            continue;
          }
        }
        bool isInTheEtaRange = false;
        const reco::PFBlockElementCluster * clustToAdd =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[itsc->second])); 
        double deta_clustToAdd = clustToAdd->clusterRef()->position().Eta() - EtaFC;
        double ene_clustToAdd = clustToAdd->clusterRef()->energy();
        
        if(fabs(deta_clustToAdd) < 0.05)
          isInTheEtaRange = true;
        
        // check for both KF and GSF
        bool isBetterEpin = false;
        if(isInTheEtaRange == false ) {
          if (DebugSetLinksDetailed)
            cout << "**** PFElectronAlgo:: SUPERCLUSTER FOUND BUT FAILS GAMMA DETA RANGE  *** " 
             << fabs(deta_clustToAdd) << endl;
          
          if(KfGsf_index < CutIndex) {          
            //GSF
            double res_before_gsf = fabs((totenergy-Pin_gsf)/Pin_gsf);
            double res_after_gsf = fabs(((totenergy+ene_clustToAdd)-Pin_gsf)/Pin_gsf);

            //KF
            const reco::PFBlockElementTrack * trackEl =  
              dynamic_cast<const reco::PFBlockElementTrack*>((&elements[KfGsf_index])); 
            double Pin_kf = trackEl->trackRef()->p();
            double res_before_kf = fabs((totenergy-Pin_kf)/Pin_kf);
            double res_after_kf = fabs(((totenergy+ene_clustToAdd)-Pin_kf)/Pin_kf);               
            
            // The new cluster improve both the E/pin?
            if(res_after_gsf < res_before_gsf && res_after_kf < res_before_kf ) {
              isBetterEpin = true;
            }
            else {
              if (DebugSetLinksDetailed)
            cout << "**** PFElectronAlgo:: SUPERCLUSTER FOUND AND FAILS ALSO RES_EPIN" 
                 << " tot energy " << totenergy 
                 << " Pin_gsf " << Pin_gsf 
                 << " Pin_kf " << Pin_kf 
                 << " cluster from SC to ADD " <<  ene_clustToAdd 
                 << " Res before GSF " <<  res_before_gsf << " res_after_gsf " << res_after_gsf 
                 << " Res before KF " <<  res_before_kf << " res_after_kf " << res_after_kf  << endl;
            }
          }
        }
        
        if(isInTheEtaRange || isBetterEpin) {       
          if (DebugSetLinksDetailed)
            cout << "!!!! PFElectronAlgo:: ECAL from SUPERCLUSTER FOUND !!!!! " << endl;
          GsfElemIndex.push_back(itsc->second);
          EcalIndex.push_back(itsc->second);
          localactive[(itsc->second)] = false;
        }
          }
        }
      }
    } // END ISOLATION IF
      }


      if(KfGsf_index < CutIndex) 
    GsfElemIndex.push_back(KfGsf_index);
      else if(KfGsf_secondIndex < CutIndex) 
    GsfElemIndex.push_back(KfGsf_secondIndex);
      
      // insert the secondary KF tracks
      GsfElemIndex.insert(GsfElemIndex.end(),convBremKFTrack.begin(),convBremKFTrack.end());
      GsfElemIndex.insert(GsfElemIndex.end(),keyBremIndex.begin(),keyBremIndex.end());
      associatedToGsf_.insert(pair<unsigned int, vector<unsigned int> >(gsfIs[iEle],GsfElemIndex));

      // The EcalMap
      for(unsigned int ikeyecal = 0; 
      ikeyecal<EcalIndex.size(); ikeyecal++){
    

    vector<unsigned int> EcalElemsIndex(0);

    std::multimap<double, unsigned int> PS1Elems;
    block.associatedElements( EcalIndex[ikeyecal],linkData,
                  PS1Elems,
                  reco::PFBlockElement::PS1,
                  reco::PFBlock::LINKTEST_ALL );
    for( std::multimap<double, unsigned int>::iterator it = PS1Elems.begin();
         it != PS1Elems.end();it++) {
      unsigned int index = it->second;
      if(localactive[index] == true) {
        
        // Check that this cluster is not closer to another ECAL cluster
        std::multimap<double, unsigned> sortedECAL;
        block.associatedElements( index,  linkData,
                      sortedECAL,
                      reco::PFBlockElement::ECAL,
                      reco::PFBlock::LINKTEST_ALL );
        unsigned jEcal = sortedECAL.begin()->second;
        if ( jEcal != EcalIndex[ikeyecal]) continue; 


        EcalElemsIndex.push_back(index);
        localactive[index] = false;
      }
    }
    
    std::multimap<double, unsigned int> PS2Elems;
    block.associatedElements( EcalIndex[ikeyecal],linkData,
                  PS2Elems,
                  reco::PFBlockElement::PS2,
                  reco::PFBlock::LINKTEST_ALL );
    for( std::multimap<double, unsigned int>::iterator it = PS2Elems.begin();
         it != PS2Elems.end();it++) {
      unsigned int index = it->second;
      if(localactive[index] == true) {
        // Check that this cluster is not closer to another ECAL cluster
        std::multimap<double, unsigned> sortedECAL;
        block.associatedElements( index,  linkData,
                      sortedECAL,
                      reco::PFBlockElement::ECAL,
                      reco::PFBlock::LINKTEST_ALL );
        unsigned jEcal = sortedECAL.begin()->second;
        if ( jEcal != EcalIndex[ikeyecal]) continue; 
        
        EcalElemsIndex.push_back(index);
        localactive[index] = false;
      }
    }
    if(ikeyecal == 0) {
      // The first cluster is that one coming from the Gsf. 
      // Only for this one is found the HCAL cluster using the Track-HCAL link
      // and not the Ecal-Hcal not well tested yet.
      std::multimap<double, unsigned int> hcalGsfElems;
      block.associatedElements( gsfIs[iEle],linkData,
                    hcalGsfElems,
                    reco::PFBlockElement::HCAL,
                    reco::PFBlock::LINKTEST_ALL );  
      for( std::multimap<double, unsigned int>::iterator it = hcalGsfElems.begin();
           it != hcalGsfElems.end();it++) {
        unsigned int index = it->second;
        //  if(localactive[index] == true) {

          // Check that this cluster is not closer to another GSF
          // remove in high energetic jets this is dangerous. 
//        std::multimap<double, unsigned> sortedGsf;
//        block.associatedElements( index,  linkData,
//                  sortedGsf,
//                  reco::PFBlockElement::GSF,
//                  reco::PFBlock::LINKTEST_ALL );
//        unsigned jGsf = sortedGsf.begin()->second;
//        if ( jGsf != gsfIs[iEle]) continue; 

          EcalElemsIndex.push_back(index);
          localactive[index] = false;
          
          // }
      }
      // if the closest ecal cluster has been link with the KF, check KF - HCAL link
      if(hcalGsfElems.size() == 0 && ClosestEcalWithKf == true) {
        std::multimap<double, unsigned int> hcalKfElems;
        block.associatedElements( KfGsf_index,linkData,
                      hcalKfElems,
                      reco::PFBlockElement::HCAL,
                      reco::PFBlock::LINKTEST_ALL );    
        for( std::multimap<double, unsigned int>::iterator it = hcalKfElems.begin();
         it != hcalKfElems.end();it++) {
          unsigned int index = it->second;
          if(localactive[index] == true) {
        
        // Check that this cluster is not closer to another KF
        std::multimap<double, unsigned> sortedKf;
        block.associatedElements( index,  linkData,
                      sortedKf,
                      reco::PFBlockElement::TRACK,
                      reco::PFBlock::LINKTEST_ALL );
        unsigned jKf = sortedKf.begin()->second;
        if ( jKf != KfGsf_index) continue; 
        EcalElemsIndex.push_back(index);
        localactive[index] = false;
          }
        }
      }
      // Find Other Primary Tracks Associated to the same Gsf Clusters
      std::multimap<double, unsigned int> kfEtraElems;
      block.associatedElements( EcalIndex[ikeyecal],linkData,
                    kfEtraElems,
                    reco::PFBlockElement::TRACK,
                    reco::PFBlock::LINKTEST_ALL );
      if(kfEtraElems.size() > 0) {
        for( std::multimap<double, unsigned int>::iterator it = kfEtraElems.begin();
         it != kfEtraElems.end();it++) {
          unsigned int index = it->second;

          // 19 Mar 2010 do not consider here tracks from gamma conv
         //  const reco::PFBlockElementTrack * kfTk =  
             //  dynamic_cast<const reco::PFBlockElementTrack*>((&elements[index]));         
          // DANIELE ?  It is not need because of the local locking 
          //   if(kfTk->isLinkedToDisplacedVertex()) continue;

          bool thisIsAMuon = false;
          thisIsAMuon =  PFMuonAlgo::isMuon(elements[index]);
          if (DebugSetLinksDetailed && thisIsAMuon)
        cout << " This is a Muon: index " << index << endl;
          if(localactive[index] == true && !thisIsAMuon) {
        if(index != KfGsf_index) {
          // Check that this track is not closer to another ECAL cluster
          // Not Sure here I need this step
          std::multimap<double, unsigned> sortedECAL;
          block.associatedElements( index,  linkData,
                        sortedECAL,
                        reco::PFBlockElement::ECAL,
                        reco::PFBlock::LINKTEST_ALL );
          unsigned jEcal = sortedECAL.begin()->second;
          if ( jEcal != EcalIndex[ikeyecal]) continue; 
          EcalElemsIndex.push_back(index);
          localactive[index] = false;
        }
          }
        }
      }   

    }
    associatedToEcal_.insert(pair<unsigned int,vector<unsigned int> >(EcalIndex[ikeyecal],EcalElemsIndex));
      }
    }// end type GSF
  } // endis there a gsf track
  
  // ******************* End Link *****************************

  // 
  // Below is only for debugging printout 
  if (DebugSetLinksSummary) {
    if(IsThereAGoodGSFTrack) {
      if (DebugSetLinksSummary) cout << " -- The Link Summary --" << endl;
      for(map<unsigned int,vector<unsigned int> >::iterator it = associatedToGsf_.begin();
      it != associatedToGsf_.end(); it++) {
    
    if (DebugSetLinksSummary) cout << " AssoGsf " << it->first << endl;
    vector<unsigned int> eleasso = it->second;
    for(unsigned int i=0;i<eleasso.size();i++) {
      PFBlockElement::Type type = elements[eleasso[i]].type();
      if(type == reco::PFBlockElement::BREM) {
        if (DebugSetLinksSummary) 
          cout << " AssoGsfElements BREM " <<  eleasso[i] <<  endl;
      }
      else if(type == reco::PFBlockElement::ECAL) {
        if (DebugSetLinksSummary) 
          cout << " AssoGsfElements ECAL " <<  eleasso[i] <<  endl;
      }
      else if(type == reco::PFBlockElement::TRACK) {
        if (DebugSetLinksSummary) 
          cout << " AssoGsfElements KF " <<  eleasso[i] <<  endl;
      }
      else {
        if (DebugSetLinksSummary) 
          cout << " AssoGsfElements ????? " <<  eleasso[i] <<  endl;
      }
    }
      }
      
      for(map<unsigned int,vector<unsigned int> >::iterator it = associatedToBrems_.begin();
      it != associatedToBrems_.end(); it++) {
    if (DebugSetLinksSummary) cout << " AssoBrem " << it->first << endl;
    vector<unsigned int> eleasso = it->second;
    for(unsigned int i=0;i<eleasso.size();i++) {
      PFBlockElement::Type type = elements[eleasso[i]].type();
      if(type == reco::PFBlockElement::ECAL) {
        if (DebugSetLinksSummary) 
          cout << " AssoBremElements ECAL " <<  eleasso[i] <<  endl;
      }
      else {
        if (DebugSetLinksSummary) 
          cout << " AssoBremElements ????? " <<  eleasso[i] <<  endl;
      }
    }
      }
      
      for(map<unsigned int,vector<unsigned int> >::iterator it = associatedToEcal_.begin();
      it != associatedToEcal_.end(); it++) {
    if (DebugSetLinksSummary) cout << " AssoECAL " << it->first << endl;
    vector<unsigned int> eleasso = it->second;
    for(unsigned int i=0;i<eleasso.size();i++) {
      PFBlockElement::Type type = elements[eleasso[i]].type();
      if(type == reco::PFBlockElement::PS1) {
        if (DebugSetLinksSummary) 
          cout << " AssoECALElements PS1  " <<  eleasso[i] <<  endl;
      }
      else if(type == reco::PFBlockElement::PS2) {
        if (DebugSetLinksSummary) 
          cout << " AssoECALElements PS2  " <<  eleasso[i] <<  endl;
      }
      else if(type == reco::PFBlockElement::HCAL) {
        if (DebugSetLinksSummary) 
          cout << " AssoECALElements HCAL  " <<  eleasso[i] <<  endl;
      }
      else {
        if (DebugSetLinksSummary) 
          cout << " AssoHCALElements ????? " <<  eleasso[i] <<  endl;
      }
    }
      }
      if (DebugSetLinksSummary) 
    cout << "-- End Summary --" <<  endl;
    }
    
  }
  // EndPrintOut
  return IsThereAGoodGSFTrack;
}
// This function get the associatedToGsf and associatedToBrems maps and run the final electronID. 
void PFElectronAlgo::SetIDOutputs(const reco::PFBlockRef&  blockRef,
                    AssMap& associatedToGsf_,
                    AssMap& associatedToBrems_,
                    AssMap& associatedToEcal_,
                    const reco::Vertex & primaryVertex){
  //PFEnergyCalibration pfcalib_;  
  const reco::PFBlock& block = *blockRef;
  PFBlock::LinkData linkData =  block.linkData();     
  const edm::OwnVector< reco::PFBlockElement >&  elements = block.elements();
  bool DebugIDOutputs = false;
  if(DebugIDOutputs) cout << " ######## Enter in SetIDOutputs #########" << endl;
  
  unsigned int cgsf=0;
  for (map<unsigned int,vector<unsigned int> >::iterator igsf = associatedToGsf_.begin();
       igsf != associatedToGsf_.end(); igsf++,cgsf++) {

    float Ene_ecalgsf = 0.;
    float Ene_hcalgsf = 0.;
    double sigmaEtaEta = 0.;
    float deta_gsfecal = 0.;
    float Ene_ecalbrem = 0.;
    float Ene_extraecalgsf = 0.;
    bool LateBrem = false;
    // bool EarlyBrem = false;
    int FirstBrem = 1000;
    unsigned int ecalGsf_index = 100000;
    unsigned int kf_index = 100000;
    // unsigned int nhits_gsf = 0;
    int NumBrem = 0;
    reco::TrackRef RefKF;  
    double posX=0.;
    double posY=0.;
    double posZ=0.;

    unsigned int gsf_index =  igsf->first;
    const reco::PFBlockElementGsfTrack * GsfEl  =  
      dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[gsf_index]));
    reco::GsfTrackRef RefGSF = GsfEl->GsftrackRef();
    float Ein_gsf   = 0.;
    if (RefGSF.isNonnull()) {
      float m_el=0.00051;
      Ein_gsf =sqrt(RefGSF->pMode()*
            RefGSF->pMode()+m_el*m_el);
      // nhits_gsf = RefGSF->hitPattern().trackerLayersWithMeasurement();
    }
    float Eout_gsf = GsfEl->Pout().t();
    float Etaout_gsf = GsfEl->positionAtECALEntrance().eta();


    if (DebugIDOutputs)  
      cout << " setIdOutput! GSF Track: Ein " <<  Ein_gsf 
       << " eta,phi " <<  Etaout_gsf
       <<", " << GsfEl->positionAtECALEntrance().phi() << endl;
    

    vector<unsigned int> assogsf_index = igsf->second;
    bool FirstEcalGsf = true;
    for  (unsigned int ielegsf=0;ielegsf<assogsf_index.size();ielegsf++) {
      PFBlockElement::Type assoele_type = elements[(assogsf_index[ielegsf])].type();
      
      
      // The RefKf is needed to build pure tracking observables
      if(assoele_type == reco::PFBlockElement::TRACK) {
    const reco::PFBlockElementTrack * KfTk =  
      dynamic_cast<const reco::PFBlockElementTrack*>((&elements[(assogsf_index[ielegsf])]));
    // 19 Mar 2010 do not consider here track from gamma conv
    
    bool isPrim = isPrimaryTrack(*KfTk,*GsfEl);
    if(!isPrim) continue;
    RefKF = KfTk->trackRef();
    kf_index = assogsf_index[ielegsf];
      }
      
   
      if  (assoele_type == reco::PFBlockElement::ECAL) {
    unsigned int keyecalgsf = assogsf_index[ielegsf];
    vector<unsigned int> assoecalgsf_index = associatedToEcal_.find(keyecalgsf)->second;
    
    vector<double> ps1Ene(0);
    vector<double> ps2Ene(0);
    for(unsigned int ips =0; ips<assoecalgsf_index.size();ips++) {
      PFBlockElement::Type typeassoecal = elements[(assoecalgsf_index[ips])].type();
      if  (typeassoecal == reco::PFBlockElement::PS1) {  
        PFClusterRef  psref = elements[(assoecalgsf_index[ips])].clusterRef();
        ps1Ene.push_back(psref->energy());
      }
      if  (typeassoecal == reco::PFBlockElement::PS2) {  
        PFClusterRef  psref = elements[(assoecalgsf_index[ips])].clusterRef();
        ps2Ene.push_back(psref->energy());
      }
      if  (typeassoecal == reco::PFBlockElement::HCAL) {
        const reco::PFBlockElementCluster * clust =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(assoecalgsf_index[ips])])); 
        Ene_hcalgsf+=clust->clusterRef()->energy();
      }
    }
    if (FirstEcalGsf) {
      FirstEcalGsf = false;
      ecalGsf_index = assogsf_index[ielegsf];
      reco::PFClusterRef clusterRef = elements[(assogsf_index[ielegsf])].clusterRef();    
      double ps1,ps2;
      ps1=ps2=0.;
      //      Ene_ecalgsf = pfcalib_.energyEm(*clusterRef,ps1Ene,ps2Ene);     
      Ene_ecalgsf = thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,ps1,ps2,applyCrackCorrections_);      
      //      std::cout << "Test " << Ene_ecalgsf <<  " PS1 / PS2 " << ps1 << " " << ps2 << std::endl;
      posX += Ene_ecalgsf * clusterRef->position().X();
      posY += Ene_ecalgsf * clusterRef->position().Y();
      posZ += Ene_ecalgsf * clusterRef->position().Z();

      if (DebugIDOutputs)  
        cout << " setIdOutput! GSF ECAL Cluster E " << Ene_ecalgsf
         << " eta,phi " << clusterRef->position().eta()
         <<", " <<  clusterRef->position().phi() << endl;
      
      deta_gsfecal = clusterRef->position().eta() - Etaout_gsf;
      
      vector< const reco::PFCluster * > pfClust_vec(0);
      pfClust_vec.clear();
      pfClust_vec.push_back(&(*clusterRef));
      
      PFClusterWidthAlgo pfwidth(pfClust_vec);
      sigmaEtaEta = pfwidth.pflowSigmaEtaEta();


    }
    else {
      reco::PFClusterRef clusterRef = elements[(assogsf_index[ielegsf])].clusterRef();        
      float TempClus_energy = thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,applyCrackCorrections_);   
      Ene_extraecalgsf += TempClus_energy;
      posX += TempClus_energy * clusterRef->position().X();
      posY += TempClus_energy * clusterRef->position().Y();
      posZ += TempClus_energy * clusterRef->position().Z();   

      if (DebugIDOutputs)
        cout << " setIdOutput! Extra ECAL Cluster E " 
         << TempClus_energy << " Tot " <<  Ene_extraecalgsf << endl;
    }
      } // end type Ecal

      
      if  (assoele_type == reco::PFBlockElement::BREM) {
    unsigned int brem_index = assogsf_index[ielegsf];
    const reco::PFBlockElementBrem * BremEl  =  
      dynamic_cast<const reco::PFBlockElementBrem*>((&elements[brem_index]));
    int TrajPos = (BremEl->indTrajPoint())-2;
    //if (TrajPos <= 3) EarlyBrem = true;
    if (TrajPos < FirstBrem) FirstBrem = TrajPos;

    vector<unsigned int> assobrem_index = associatedToBrems_.find(brem_index)->second;
    for (unsigned int ibrem = 0; ibrem < assobrem_index.size(); ibrem++){
      if (elements[(assobrem_index[ibrem])].type() == reco::PFBlockElement::ECAL) {
        unsigned int keyecalbrem = assobrem_index[ibrem];
        vector<unsigned int> assoelebrem_index = associatedToEcal_.find(keyecalbrem)->second;
        vector<double> ps1EneFromBrem(0);
        vector<double> ps2EneFromBrem(0);
        for (unsigned int ielebrem=0; ielebrem<assoelebrem_index.size();ielebrem++) {
          if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS1) {
        PFClusterRef  psref = elements[(assoelebrem_index[ielebrem])].clusterRef();
        ps1EneFromBrem.push_back(psref->energy());
          }
          if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS2) {
        PFClusterRef  psref = elements[(assoelebrem_index[ielebrem])].clusterRef();
        ps2EneFromBrem.push_back(psref->energy());
          }        
        }
        // check if it is a compatible cluster also with the gsf track
        if( assobrem_index[ibrem] !=  ecalGsf_index) {
          reco::PFClusterRef clusterRef = 
        elements[(assobrem_index[ibrem])].clusterRef();
          float BremClus_energy = thePFEnergyCalibration_->energyEm(*clusterRef,ps1EneFromBrem,ps2EneFromBrem,applyCrackCorrections_);
          Ene_ecalbrem += BremClus_energy;
          posX +=  BremClus_energy * clusterRef->position().X();
          posY +=  BremClus_energy * clusterRef->position().Y();
          posZ +=  BremClus_energy * clusterRef->position().Z();      
          
          NumBrem++;
          if (DebugIDOutputs) cout << " setIdOutput::BREM Cluster " 
                       <<  BremClus_energy << " eta,phi " 
                       <<  clusterRef->position().eta()  <<", " 
                       << clusterRef->position().phi() << endl;
        }
        else {
          LateBrem = true;
        }
      }
    }
      }    
    } 
    if (Ene_ecalgsf > 0.) {
      // here build the new BDT observables
      
      //  ***** Normalization observables ****
      if(RefGSF.isNonnull()) {
    PFCandidateElectronExtra myExtra(RefGSF) ;
    myExtra.setGsfTrackPout(GsfEl->Pout());
    myExtra.setKfTrackRef(RefKF);
    float Pt_gsf = RefGSF->ptMode();
    lnPt_gsf = log(Pt_gsf);
    Eta_gsf = RefGSF->etaMode();
    
    // **** Pure tracking observables. 
    if(RefGSF->ptModeError() > 0.)
      dPtOverPt_gsf = RefGSF->ptModeError()/Pt_gsf;
    
    nhit_gsf= RefGSF->hitPattern().trackerLayersWithMeasurement();
    chi2_gsf = RefGSF->normalizedChi2();
    // change GsfEl->Pout().pt() as soon the PoutMode is on the GsfTrack DataFormat
    DPtOverPt_gsf =  (RefGSF->ptMode() - GsfEl->Pout().pt())/RefGSF->ptMode();
    
    
    nhit_kf = 0;
    chi2_kf = -0.01;
    DPtOverPt_kf = -0.01;
    if (RefKF.isNonnull()) {
      nhit_kf= RefKF->hitPattern().trackerLayersWithMeasurement();
      chi2_kf = RefKF->normalizedChi2();
      // Not used, strange behaviour to be checked. And Kf->OuterPt is 
      // in track extra. 
      //DPtOverPt_kf = 
      //  (RefKF->pt() - RefKF->outerPt())/RefKF->pt();
      
    }
    
    // **** Tracker-Ecal-Hcal observables 
    EtotPinMode        =  (Ene_ecalgsf + Ene_ecalbrem + Ene_extraecalgsf) / Ein_gsf; 
    EGsfPoutMode       =  Ene_ecalgsf/Eout_gsf;
    EtotBremPinPoutMode = Ene_ecalbrem /(Ein_gsf - Eout_gsf);
    DEtaGsfEcalClust  = fabs(deta_gsfecal);
    myExtra.setSigmaEtaEta(sigmaEtaEta);
    myExtra.setDeltaEta(DEtaGsfEcalClust);
    SigmaEtaEta = log(sigmaEtaEta);
    
    lateBrem = -1;
    firstBrem = -1;
    earlyBrem = -1;
    if(NumBrem > 0) {
      if (LateBrem) lateBrem = 1;
      else lateBrem = 0;
      firstBrem = FirstBrem;
      if(FirstBrem < 4) earlyBrem = 1;
      else earlyBrem = 0;
    }      
    
    HOverHE = Ene_hcalgsf/(Ene_hcalgsf + Ene_ecalgsf);
    HOverPin = Ene_hcalgsf / Ein_gsf;
    myExtra.setHadEnergy(Ene_hcalgsf);
    myExtra.setEarlyBrem(earlyBrem);
    myExtra.setLateBrem(lateBrem);
    //  std::cout<< " Inserting in extra " << electronExtra_.size() << std::endl;

    // Put cuts and access the BDT output
    if(DPtOverPt_gsf < -0.2) DPtOverPt_gsf = -0.2;
    if(DPtOverPt_gsf > 1.) DPtOverPt_gsf = 1.;
    
    if(dPtOverPt_gsf > 0.3) dPtOverPt_gsf = 0.3;
    
    if(chi2_gsf > 10.) chi2_gsf = 10.;
    
    if(DPtOverPt_kf < -0.2) DPtOverPt_kf = -0.2;
    if(DPtOverPt_kf > 1.) DPtOverPt_kf = 1.;
    
    if(chi2_kf > 10.) chi2_kf = 10.;
    
    if(EtotPinMode < 0.) EtotPinMode = 0.;
    if(EtotPinMode > 5.) EtotPinMode = 5.;
    
    if(EGsfPoutMode < 0.) EGsfPoutMode = 0.;
    if(EGsfPoutMode > 5.) EGsfPoutMode = 5.;
    
    if(EtotBremPinPoutMode < 0.) EtotBremPinPoutMode = 0.01;
    if(EtotBremPinPoutMode > 5.) EtotBremPinPoutMode = 5.;
    
    if(DEtaGsfEcalClust > 0.1) DEtaGsfEcalClust = 0.1;
    
    if(SigmaEtaEta < -14) SigmaEtaEta = -14;
    
    if(HOverPin < 0.) HOverPin = 0.;
    if(HOverPin > 5.) HOverPin = 5.;
    double mvaValue = tmvaReader_->EvaluateMVA("BDT");
    
    // add output observables 
    BDToutput_[cgsf] = mvaValue;
    myExtra.setMVA(mvaValue);
    electronExtra_.push_back(myExtra);


    // IMPORTANT Additional conditions
    if(mvaValue > mvaEleCut_) {
      // Check if the ecal cluster is isolated. 
      //
      // If there is at least one extra track and H/H+E > 0.05 or SumP(ExtraKf)/EGsf or  
      // #Tracks > 3 I leave this job to PFAlgo, otherwise I lock those extra tracks. 
      // Note:
      // The tracks coming from the 4 step of the iterative tracking are not considered, 
      // because they can come from secondary converted brems. 
      // They are locked to avoid double counting.
      // The lock is done in SetActivate function. 
      // All this can improved but it is already a good step. 
      
      
      // Find if the cluster is isolated. 
      unsigned int iextratrack = 0;
      unsigned int itrackHcalLinked = 0;
      float SumExtraKfP = 0.;


      double Etotal = Ene_ecalgsf + Ene_ecalbrem + Ene_extraecalgsf;
      posX /=Etotal;
      posY /=Etotal;
      posZ /=Etotal;
      math::XYZPoint sc_pflow(posX,posY,posZ);
      double ETtotal = Etotal*sin(sc_pflow.Theta());
      double phiTrack = RefGSF->phiMode();
      double dphi_normalsc = sc_pflow.Phi() - phiTrack;
      if ( dphi_normalsc < -M_PI ) 
        dphi_normalsc = dphi_normalsc + 2.*M_PI;
      else if ( dphi_normalsc > M_PI ) 
        dphi_normalsc = dphi_normalsc - 2.*M_PI;
      dphi_normalsc = fabs(dphi_normalsc);
    
      
      if(ecalGsf_index < 100000) {
        vector<unsigned int> assoecalgsf_index = associatedToEcal_.find(ecalGsf_index)->second;
        for(unsigned int itrk =0; itrk<assoecalgsf_index.size();itrk++) {
          PFBlockElement::Type typeassoecal = elements[(assoecalgsf_index[itrk])].type();
          if(typeassoecal == reco::PFBlockElement::TRACK) {
        const reco::PFBlockElementTrack * kfTk =  
          dynamic_cast<const reco::PFBlockElementTrack*>((&elements[(assoecalgsf_index[itrk])]));
        // 19 Mar 2010 do not consider here tracks from gamma conv
        // This should be not needed because the seleted extra tracks from GammaConv
        // will be locked and can not be associated to the ecal elements 
        //if(kfTk->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)) continue;
        
        
        reco::TrackRef trackref =  kfTk->trackRef();
        unsigned int Algo = whichTrackAlgo(trackref);
        // iter0, iter1, iter2, iter3 = Algo < 3
        // algo 4,5,6,7
        int nexhits = trackref->hitPattern().numberOfLostHits(HitPattern::MISSING_INNER_HITS);
        
        bool trackIsFromPrimaryVertex = false;
        for (Vertex::trackRef_iterator trackIt = primaryVertex.tracks_begin(); trackIt != primaryVertex.tracks_end(); ++trackIt) {
          if ( (*trackIt).castTo<TrackRef>() == trackref ) {
            trackIsFromPrimaryVertex = true;
            break;
          }
        }
        
        // probably we could now remove the algo request?? 
        if(Algo < 3 && nexhits == 0 && trackIsFromPrimaryVertex) {
          //if(Algo < 3) 
          if(DebugIDOutputs) 
            cout << " The ecalGsf cluster is not isolated: >0 KF extra with algo < 3" << endl;
          
          float p_trk = trackref->p();
          
          // expected number of inner hits
          
          if(DebugIDOutputs) 
            cout << "  p_trk " <<  p_trk
             << " nexhits " << nexhits << endl;
          
          SumExtraKfP += p_trk;
          iextratrack++;
          // Check if these extra tracks are HCAL linked
          std::multimap<double, unsigned int> hcalKfElems;
          block.associatedElements( assoecalgsf_index[itrk],linkData,
                        hcalKfElems,
                        reco::PFBlockElement::HCAL,
                        reco::PFBlock::LINKTEST_ALL );
          if(hcalKfElems.size() > 0) {
            itrackHcalLinked++;
          }
        }
          } 
        }
      }
      if( iextratrack > 0) {
        //if(iextratrack > 3 || HOverHE > 0.05 || (SumExtraKfP/Ene_ecalgsf) > 1. 
        if(iextratrack > 3 || Ene_hcalgsf > 10 || (SumExtraKfP/Ene_ecalgsf) > 1. 
           || (ETtotal > 50. && iextratrack > 1 && (Ene_hcalgsf/Ene_ecalgsf) > 0.1) ) {
          if(DebugIDOutputs) 
        cout << " *****This electron candidate is discarded: Non isolated  # tracks "       
             << iextratrack << " HOverHE " << HOverHE 
             << " SumExtraKfP/Ene_ecalgsf " << SumExtraKfP/Ene_ecalgsf 
             << " SumExtraKfP " << SumExtraKfP 
             << " Ene_ecalgsf " << Ene_ecalgsf
             << " ETtotal " << ETtotal
             << " Ene_hcalgsf/Ene_ecalgsf " << Ene_hcalgsf/Ene_ecalgsf
             << endl;
          
          BDToutput_[cgsf] = mvaValue-2.;
          lockExtraKf_[cgsf] = false;
        }
        // if the Ecluster ~ Ptrack and the extra tracks are HCAL linked 
        // the electron is retained and the kf tracks are not locked
        if( (fabs(1.-EtotPinMode) < 0.2 && (fabs(Eta_gsf) < 1.0 || fabs(Eta_gsf) > 2.0)) ||
        ((EtotPinMode < 1.1 && EtotPinMode > 0.6) && (fabs(Eta_gsf) >= 1.0 && fabs(Eta_gsf) <= 2.0))) {
          if( fabs(1.-EGsfPoutMode) < 0.5 && 
          (itrackHcalLinked == iextratrack) && 
          kf_index < 100000 ) {
        
        BDToutput_[cgsf] = mvaValue;
        lockExtraKf_[cgsf] = false;
        if(DebugIDOutputs)
          cout << " *****This electron is reactivated  # tracks "       
               << iextratrack << " #tracks hcal linked " << itrackHcalLinked 
               << " SumExtraKfP/Ene_ecalgsf " << SumExtraKfP/Ene_ecalgsf  
               << " EtotPinMode " << EtotPinMode << " EGsfPoutMode " << EGsfPoutMode 
               << " eta gsf " << fabs(Eta_gsf) << " kf index " << kf_index <<endl;
          }
        }
      }
      // This is a pion:
      if (HOverPin > 1. && HOverHE > 0.1 && EtotPinMode < 0.5) {
        if(DebugIDOutputs) 
          cout << " *****This electron candidate is discarded  HCAL ENERGY "    
           << " HOverPin " << HOverPin << " HOverHE " << HOverHE  << " EtotPinMode" << EtotPinMode << endl;
        BDToutput_[cgsf] = mvaValue-4.;
        lockExtraKf_[cgsf] = false;
      }
      
      // Reject Crazy E/p values... to be understood in the future how to train a 
      // BDT in order to avoid to select this bad electron candidates. 
    
      if( EtotPinMode < 0.2 && EGsfPoutMode < 0.2 ) {
        if(DebugIDOutputs) 
          cout << " *****This electron candidate is discarded  Low ETOTPIN "
           << " EtotPinMode " << EtotPinMode << " EGsfPoutMode " << EGsfPoutMode << endl;
        BDToutput_[cgsf] = mvaValue-6.;
      }
      
      // For not-preselected Gsf Tracks ET > 50 GeV, apply dphi preselection
      if(ETtotal > 50. && dphi_normalsc > 0.1 ) {
        if(DebugIDOutputs) 
          cout << " *****This electron candidate is discarded  Large ANGLE "
           << " ETtotal " << ETtotal << " EGsfPoutMode " << dphi_normalsc << endl;
        BDToutput_[cgsf] =  mvaValue-6.;
      }
    }


    if (DebugIDOutputs) {
      cout << " **** BDT observables ****" << endl;
      cout << " < Normalization > " << endl;
      cout << " Pt_gsf " << Pt_gsf << " Pin " << Ein_gsf  << " Pout " << Eout_gsf
           << " Eta_gsf " << Eta_gsf << endl;
      cout << " < PureTracking > " << endl;
      cout << " dPtOverPt_gsf " << dPtOverPt_gsf 
           << " DPtOverPt_gsf " << DPtOverPt_gsf
           << " chi2_gsf " << chi2_gsf
           << " nhit_gsf " << nhit_gsf
           << " DPtOverPt_kf " << DPtOverPt_kf
           << " chi2_kf " << chi2_kf 
           << " nhit_kf " << nhit_kf <<  endl;
      cout << " < track-ecal-hcal-ps " << endl;
      cout << " EtotPinMode " << EtotPinMode 
           << " EGsfPoutMode " << EGsfPoutMode
           << " EtotBremPinPoutMode " << EtotBremPinPoutMode
           << " DEtaGsfEcalClust " << DEtaGsfEcalClust 
           << " SigmaEtaEta " << SigmaEtaEta
           << " HOverHE " << HOverHE << " Hcal energy " << Ene_hcalgsf
           << " HOverPin " << HOverPin 
           << " lateBrem " << lateBrem
           << " firstBrem " << firstBrem << endl;
      cout << " !!!!!!!!!!!!!!!! the BDT output !!!!!!!!!!!!!!!!!: direct " << mvaValue 
           << " corrected " << BDToutput_[cgsf] <<  endl; 
      
    }
      }
      else {
    if (DebugIDOutputs) 
      cout << " Gsf Ref isNULL " << endl;
    BDToutput_[cgsf] = -2.;
      }
    } else {
      if (DebugIDOutputs) 
    cout << " No clusters associated to the gsf " << endl;
      BDToutput_[cgsf] = -2.;      
    }  
    DebugIDOutputs = false;
  } // End Loop on Map1   
  return;
}
// This function get the associatedToGsf and associatedToBrems maps and  
// compute the electron 4-mom and set the pf candidate, for
// the gsf track with a BDTcut > mvaEleCut_
void PFElectronAlgo::SetCandidates(const reco::PFBlockRef&  blockRef,
                     AssMap& associatedToGsf_,
                     AssMap& associatedToBrems_,
                     AssMap& associatedToEcal_){
  
  const reco::PFBlock& block = *blockRef;
  PFBlock::LinkData linkData =  block.linkData();     
  const edm::OwnVector< reco::PFBlockElement >&  elements = block.elements();
  PFEnergyResolution pfresol_;
  //PFEnergyCalibration pfcalib_;

  bool DebugIDCandidates = false;
//   vector<reco::PFCluster> pfClust_vec(0);
//   pfClust_vec.clear();

  unsigned int cgsf=0;
  for (map<unsigned int,vector<unsigned int> >::iterator igsf = associatedToGsf_.begin();
       igsf != associatedToGsf_.end(); igsf++,cgsf++) {
    unsigned int gsf_index =  igsf->first;
           
    

    // They should be reset for each gsf track
    int eecal=0;
    int hcal=0;
    int charge =0; 
    // bool goodphi=true;
    math::XYZTLorentzVector momentum_kf,momentum_gsf,momentum,momentum_mean;
    float dpt=0; float dpt_gsf=0;
    float Eene=0; float dene=0; float Hene=0.;
    float RawEene = 0.;
    double posX=0.;
    double posY=0.;
    double posZ=0.;
    std::vector<float> bremEnergyVec;

    std::vector<const PFCluster*> pfSC_Clust_vec; 

    float de_gs = 0., de_me = 0., de_kf = 0.; 
    float m_el=0.00051;
    int nhit_kf=0; int nhit_gsf=0;
    bool has_gsf=false;
    bool has_kf=false;
    math::XYZTLorentzVector newmomentum;
    float ps1TotEne = 0;
    float ps2TotEne = 0;
    vector<unsigned int> elementsToAdd(0);
    reco::TrackRef RefKF;  



    elementsToAdd.push_back(gsf_index);
    const reco::PFBlockElementGsfTrack * GsfEl  =  
      dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[gsf_index]));
    const math::XYZPointF& posGsfEcalEntrance = GsfEl->positionAtECALEntrance();
    reco::GsfTrackRef RefGSF = GsfEl->GsftrackRef();
    if (RefGSF.isNonnull()) {
      
      has_gsf=true;
     
      charge= RefGSF->chargeMode();
      nhit_gsf= RefGSF->hitPattern().trackerLayersWithMeasurement();
      
      momentum_gsf.SetPx(RefGSF->pxMode());
      momentum_gsf.SetPy(RefGSF->pyMode());
      momentum_gsf.SetPz(RefGSF->pzMode());
      float ENE=sqrt(RefGSF->pMode()*
             RefGSF->pMode()+m_el*m_el);
      
      if( DebugIDCandidates ) 
    cout << "SetCandidates:: GsfTrackRef: Ene " << ENE 
         << " charge " << charge << " nhits " << nhit_gsf <<endl;
      
      momentum_gsf.SetE(ENE);       
      dpt_gsf=RefGSF->ptModeError()*
    (RefGSF->pMode()/RefGSF->ptMode());
      
      momentum_mean.SetPx(RefGSF->px());
      momentum_mean.SetPy(RefGSF->py());
      momentum_mean.SetPz(RefGSF->pz());
      float ENEm=sqrt(RefGSF->p()*
              RefGSF->p()+m_el*m_el);
      momentum_mean.SetE(ENEm);       
      //       dpt_mean=RefGSF->ptError()*
      //    (RefGSF->p()/RefGSF->pt());  
    }
    else {
      if( DebugIDCandidates ) 
    cout <<  "SetCandidates:: !!!!  NULL GSF Track Ref " << endl;   
    } 

    //    vector<unsigned int> assogsf_index =  associatedToGsf_[igsf].second;
    vector<unsigned int> assogsf_index = igsf->second;
    unsigned int ecalGsf_index = 100000;
    bool FirstEcalGsf = true;
    for  (unsigned int ielegsf=0;ielegsf<assogsf_index.size();ielegsf++) {
      PFBlockElement::Type assoele_type = elements[(assogsf_index[ielegsf])].type();
      if  (assoele_type == reco::PFBlockElement::TRACK) {
    elementsToAdd.push_back((assogsf_index[ielegsf])); // Daniele
    const reco::PFBlockElementTrack * KfTk =  
      dynamic_cast<const reco::PFBlockElementTrack*>((&elements[(assogsf_index[ielegsf])]));
    // 19 Mar 2010 do not consider here track from gamam conv
    bool isPrim = isPrimaryTrack(*KfTk,*GsfEl);
    if(!isPrim) continue;
    
    RefKF = KfTk->trackRef();
    if (RefKF.isNonnull()) {
      has_kf = true;
      // dpt_kf=(RefKF->ptError()*RefKF->ptError());
      nhit_kf=RefKF->hitPattern().trackerLayersWithMeasurement();
      momentum_kf.SetPx(RefKF->px());
      momentum_kf.SetPy(RefKF->py());
      momentum_kf.SetPz(RefKF->pz());
      float ENE=sqrt(RefKF->p()*RefKF->p()+m_el*m_el);
      if( DebugIDCandidates ) 
        cout << "SetCandidates:: KFTrackRef: Ene " << ENE << " nhits " << nhit_kf << endl;
      
      momentum_kf.SetE(ENE);
    }
    else {
      if( DebugIDCandidates ) 
        cout <<  "SetCandidates:: !!!! NULL KF Track Ref " << endl;
    }
      } 

      if  (assoele_type == reco::PFBlockElement::ECAL) {
    unsigned int keyecalgsf = assogsf_index[ielegsf];
    vector<unsigned int> assoecalgsf_index = associatedToEcal_.find(keyecalgsf)->second;
    vector<double> ps1Ene(0);
    vector<double> ps2Ene(0);
    // Important is the PS clusters are not saved before the ecal one, these
    // energy are not correctly assigned 
    // For the moment I get only the closest PS clusters: this has to be changed
    for(unsigned int ips =0; ips<assoecalgsf_index.size();ips++) {
      PFBlockElement::Type typeassoecal = elements[(assoecalgsf_index[ips])].type();
      if  (typeassoecal == reco::PFBlockElement::PS1) {  
        PFClusterRef  psref = elements[(assoecalgsf_index[ips])].clusterRef();
        ps1Ene.push_back(psref->energy());
        elementsToAdd.push_back((assoecalgsf_index[ips]));
      }
      if  (typeassoecal == reco::PFBlockElement::PS2) {  
        PFClusterRef  psref = elements[(assoecalgsf_index[ips])].clusterRef();
        ps2Ene.push_back(psref->energy());
        elementsToAdd.push_back((assoecalgsf_index[ips]));
      }
      if  (typeassoecal == reco::PFBlockElement::HCAL) {
        const reco::PFBlockElementCluster * clust =  
          dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(assoecalgsf_index[ips])])); 
        elementsToAdd.push_back((assoecalgsf_index[ips])); 
        Hene+=clust->clusterRef()->energy();
        hcal++;
      }
    }
    elementsToAdd.push_back((assogsf_index[ielegsf]));


    const reco::PFBlockElementCluster * clust =  
      dynamic_cast<const reco::PFBlockElementCluster*>((&elements[(assogsf_index[ielegsf])]));
    
    eecal++;
    
    const reco::PFCluster& cl(*clust->clusterRef());
    //pfClust_vec.push_back((*clust->clusterRef()));

    // The electron RAW energy is the energy of the corrected GSF cluster   
    double ps1,ps2;
    ps1=ps2=0.;
    //  float EE=pfcalib_.energyEm(cl,ps1Ene,ps2Ene);
    float EE = thePFEnergyCalibration_->energyEm(cl,ps1Ene,ps2Ene,ps1,ps2,applyCrackCorrections_);    
    //  float RawEE = cl.energy();

    float ceta=cl.position().eta();
    float cphi=cl.position().phi();
    
    /*
      float mphi=-2.97025;
      if (ceta<0) mphi+=0.00638;
      
      for (int ip=1; ip<19; ip++){
      float df= cphi - (mphi+(ip*6.283185/18));
      if (fabs(df)<0.01) goodphi=false;
      }
    */

    float dE=pfresol_.getEnergyResolutionEm(EE,cl.position().eta());
    if( DebugIDCandidates ) 
      cout << "SetCandidates:: EcalCluster: EneNoCalib " << clust->clusterRef()->energy()  
           << " eta,phi " << ceta << "," << cphi << " Calib " <<  EE << " dE " <<  dE <<endl;

    bool elecCluster=false;
    if (FirstEcalGsf) {
      FirstEcalGsf = false;
      elecCluster=true;
      ecalGsf_index = assogsf_index[ielegsf];
      //      std::cout << " PFElectronAlgo / Seed " << EE << std::endl;
      RawEene += EE;
    }
    
    // create a photon/electron candidate
    math::XYZTLorentzVector clusterMomentum;
    math::XYZPoint direction=cl.position()/cl.position().R();
    clusterMomentum.SetPxPyPzE(EE*direction.x(),
                   EE*direction.y(),
                   EE*direction.z(),
                   EE);
    reco::PFCandidate cluster_Candidate((elecCluster)?charge:0,
                        clusterMomentum, 
                        (elecCluster)? reco::PFCandidate::e : reco::PFCandidate::gamma);
    
    cluster_Candidate.setPs1Energy(ps1);
    cluster_Candidate.setPs2Energy(ps2);
    // The Raw Ecal energy will be the energy of the basic cluster. 
    // It will be the corrected energy without the preshower
    cluster_Candidate.setEcalEnergy(EE-ps1-ps2,EE);
    //        std::cout << " PFElectronAlgo, adding Brem (1) " << EE << std::endl;
    cluster_Candidate.setPositionAtECALEntrance(math::XYZPointF(cl.position()));
    cluster_Candidate.addElementInBlock(blockRef,assogsf_index[ielegsf]);
    // store the photon candidate
    std::map<unsigned int,std::vector<reco::PFCandidate> >::iterator itcheck=
      electronConstituents_.find(cgsf);
    if(itcheck==electronConstituents_.end())
      {       
        // beurk
        std::vector<reco::PFCandidate> tmpVec;
        tmpVec.push_back(cluster_Candidate);
        electronConstituents_.insert(std::pair<unsigned int, std::vector<reco::PFCandidate> >
                     (cgsf,tmpVec));
      }
    else
      {
        itcheck->second.push_back(cluster_Candidate);
      }
    
    Eene+=EE;
    posX +=  EE * cl.position().X();
    posY +=  EE * cl.position().Y();
    posZ +=  EE * cl.position().Z();      
    ps1TotEne+=ps1;
    ps2TotEne+=ps2;
    dene+=dE*dE;
    
    //MM Add cluster to the vector pfSC_Clust_vec needed for brem corrections
    pfSC_Clust_vec.push_back( &cl );

      }
      


      // Important: Add energy from the brems
      if  (assoele_type == reco::PFBlockElement::BREM) {
    unsigned int brem_index = assogsf_index[ielegsf];
    vector<unsigned int> assobrem_index = associatedToBrems_.find(brem_index)->second;
    elementsToAdd.push_back(brem_index);
    for (unsigned int ibrem = 0; ibrem < assobrem_index.size(); ibrem++){
      if (elements[(assobrem_index[ibrem])].type() == reco::PFBlockElement::ECAL) {
        // brem emission is from the considered gsf track
        if( assobrem_index[ibrem] !=  ecalGsf_index) {
          unsigned int keyecalbrem = assobrem_index[ibrem];
          const vector<unsigned int>& assoelebrem_index = associatedToEcal_.find(keyecalbrem)->second;
          vector<double> ps1EneFromBrem(0);
          vector<double> ps2EneFromBrem(0);
          for (unsigned int ielebrem=0; ielebrem<assoelebrem_index.size();ielebrem++) {
        if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS1) {
          PFClusterRef  psref = elements[(assoelebrem_index[ielebrem])].clusterRef();
          ps1EneFromBrem.push_back(psref->energy());
          elementsToAdd.push_back(assoelebrem_index[ielebrem]);
        }
        if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS2) {
          PFClusterRef  psref = elements[(assoelebrem_index[ielebrem])].clusterRef();
          ps2EneFromBrem.push_back(psref->energy());
          elementsToAdd.push_back(assoelebrem_index[ielebrem]);
        }     
          }
          elementsToAdd.push_back(assobrem_index[ibrem]);
          reco::PFClusterRef clusterRef = elements[(assobrem_index[ibrem])].clusterRef();
          //pfClust_vec.push_back(*clusterRef);
          // to get a calibrated PS energy 
          double ps1=0;
          double ps2=0;
          float EE = thePFEnergyCalibration_->energyEm(*clusterRef,ps1EneFromBrem,ps2EneFromBrem,ps1,ps2,applyCrackCorrections_);
          bremEnergyVec.push_back(EE);
          // float RawEE  = clusterRef->energy();
          float ceta = clusterRef->position().eta();
          // float cphi = clusterRef->position().phi();
          float dE=pfresol_.getEnergyResolutionEm(EE,ceta);
          if( DebugIDCandidates ) 
        cout << "SetCandidates:: BremCluster: Ene " << EE << " dE " <<  dE <<endl;    

          Eene+=EE;
          posX +=  EE * clusterRef->position().X();
          posY +=  EE * clusterRef->position().Y();
          posZ +=  EE * clusterRef->position().Z();   
          ps1TotEne+=ps1;
          ps2TotEne+=ps2;
          // Removed 4 March 2009. Florian. The Raw energy is the (corrected) one of the GSF cluster only
          //          RawEene += RawEE;
          dene+=dE*dE;

          //MM Add cluster to the vector pfSC_Clust_vec needed for brem corrections
          pfSC_Clust_vec.push_back( clusterRef.get() );

          // create a PFCandidate out of it. Watch out, it is for the e/gamma and tau only
          // not to be used by the PFAlgo
          math::XYZTLorentzVector photonMomentum;
          math::XYZPoint direction=clusterRef->position()/clusterRef->position().R();
          
          photonMomentum.SetPxPyPzE(EE*direction.x(),
                    EE*direction.y(),
                    EE*direction.z(),
                    EE);
          reco::PFCandidate photon_Candidate(0,photonMomentum, reco::PFCandidate::gamma);
          
          photon_Candidate.setPs1Energy(ps1);
          photon_Candidate.setPs2Energy(ps2);
          // yes, EE, we want the raw ecal energy of the daugther to have the same definition
          // as the GSF cluster
          photon_Candidate.setEcalEnergy(EE-ps1-ps2,EE);
          //          std::cout << " PFElectronAlgo, adding Brem " << EE << std::endl;
          photon_Candidate.setPositionAtECALEntrance(math::XYZPointF(clusterRef->position()));
          photon_Candidate.addElementInBlock(blockRef,assobrem_index[ibrem]);

          // store the photon candidate
          std::map<unsigned int,std::vector<reco::PFCandidate> >::iterator itcheck=
        electronConstituents_.find(cgsf);
          if(itcheck==electronConstituents_.end())
        {         
          // beurk
          std::vector<reco::PFCandidate> tmpVec;
          tmpVec.push_back(photon_Candidate);
          electronConstituents_.insert(std::pair<unsigned int, std::vector<reco::PFCandidate> >
                       (cgsf,tmpVec));
        }
          else
        {
          itcheck->second.push_back(photon_Candidate);
        }
        }
      } 
    }
      }
    } // End Loop On element associated to the GSF tracks
    if (has_gsf) {
      
      // SuperCluster energy corrections
      double unCorrEene = Eene;
      double absEta = fabs(momentum_gsf.Eta());
      double emTheta = momentum_gsf.Theta();
      PFClusterWidthAlgo pfSCwidth(pfSC_Clust_vec); 
      double brLinear = pfSCwidth.pflowPhiWidth()/pfSCwidth.pflowEtaWidth(); 
      pfSC_Clust_vec.clear();
      
      if( DebugIDCandidates ) 
    cout << "PFEelectronAlgo:: absEta " << absEta  << " theta " << emTheta 
         << " EneRaw " << Eene << " Err " << dene;
      
      // The calibrations are provided till ET = 200 GeV //No longer a such cut MM
      // Protection on at least 1 GeV energy...avoid possible divergencies at very low energy.
      if(usePFSCEleCalib_ && unCorrEene > 0.) { 
    if( absEta < 1.5) {
      double Etene = Eene*sin(emTheta);
      double emBR_e = thePFSCEnergyCalibration_->SCCorrFBremBarrel(Eene, Etene, brLinear); 
      double emBR_et = emBR_e*sin(emTheta); 
      double emCorrFull_et = thePFSCEnergyCalibration_->SCCorrEtEtaBarrel(emBR_et, absEta); 
      Eene = emCorrFull_et/sin(emTheta);
    }
    else {
      //  double Etene = Eene*sin(emTheta); //not needed anymore for endcaps MM
      double emBR_e = thePFSCEnergyCalibration_->SCCorrFBremEndcap(Eene, absEta, brLinear); 
      double emBR_et = emBR_e*sin(emTheta); 
      double emCorrFull_et = thePFSCEnergyCalibration_->SCCorrEtEtaEndcap(emBR_et, absEta); 
      Eene = emCorrFull_et/sin(emTheta);
    }
    dene = sqrt(dene)*(Eene/unCorrEene);
    dene = dene*dene;
      }

      if( DebugIDCandidates ) 
    cout << " EneCorrected " << Eene << " Err " << dene  << endl;

      // charge determination with the majority method
      // if the kf track exists: 2 among 3 of supercluster barycenter position
      // gsf track and kf track
      if(has_kf && unCorrEene > 0.) {
    posX /=unCorrEene;
    posY /=unCorrEene;
    posZ /=unCorrEene;
    math::XYZPoint sc_pflow(posX,posY,posZ);

    std::multimap<double, unsigned int> bremElems;
    block.associatedElements( gsf_index,linkData,
                  bremElems,
                  reco::PFBlockElement::BREM,
                  reco::PFBlock::LINKTEST_ALL );

    double phiTrack = RefGSF->phiMode();
    if(bremElems.size()>0) {
      unsigned int brem_index =  bremElems.begin()->second;
      const reco::PFBlockElementBrem * BremEl  =  
        dynamic_cast<const reco::PFBlockElementBrem*>((&elements[brem_index]));
      phiTrack = BremEl->positionAtECALEntrance().phi();
    }

    double dphi_normalsc = sc_pflow.Phi() - phiTrack;
    if ( dphi_normalsc < -M_PI ) 
      dphi_normalsc = dphi_normalsc + 2.*M_PI;
    else if ( dphi_normalsc > M_PI ) 
      dphi_normalsc = dphi_normalsc - 2.*M_PI;
    
    int chargeGsf = RefGSF->chargeMode();
    int chargeKf = RefKF->charge();

    int chargeSC = 0;
    if(dphi_normalsc < 0.) 
      chargeSC = 1;
    else 
      chargeSC = -1;
    
    if(chargeKf == chargeGsf) 
      charge = chargeGsf;
    else if(chargeGsf == chargeSC)
      charge = chargeGsf;
    else 
      charge = chargeKf;

    if( DebugIDCandidates ) 
      cout << "PFElectronAlgo:: charge determination " 
           << " charge GSF " << chargeGsf 
           << " charge KF " << chargeKf 
           << " charge SC " << chargeSC
           << " Final Charge " << charge << endl;
    
      }
       
      // Think about this... 
      if ((nhit_gsf<8) && (has_kf)){
    
    // Use Hene if some condition.... 
    
    momentum=momentum_kf;
    float Fe=Eene;
    float scale= Fe/momentum.E();
    
    // Daniele Changed
    if (Eene < 0.0001) {
      Fe = momentum.E();
      scale = 1.;
    }


    newmomentum.SetPxPyPzE(scale*momentum.Px(),
                   scale*momentum.Py(),
                   scale*momentum.Pz(),Fe);
    if( DebugIDCandidates ) 
      cout << "SetCandidates:: (nhit_gsf<8) && (has_kf):: pt " << newmomentum.pt() << " Ene " <<  Fe <<endl;

    
      } 
      if ((nhit_gsf>7) || (has_kf==false)){
    if(Eene > 0.0001) {
      de_gs=1-momentum_gsf.E()/Eene;
      de_me=1-momentum_mean.E()/Eene;
      de_kf=1-momentum_kf.E()/Eene;
    }

    momentum=momentum_gsf;
    dpt=1/(dpt_gsf*dpt_gsf);
    
    if(dene > 0.)
      dene= 1./dene;
    
    float Fe = 0.;
    if(Eene > 0.0001) {
      Fe =((dene*Eene) +(dpt*momentum.E()))/(dene+dpt);
    }
    else {
      Fe=momentum.E();
    }
    
    if ((de_gs>0.05)&&(de_kf>0.05)){
      Fe=Eene;
    }
    if ((de_gs<-0.1)&&(de_me<-0.1) &&(de_kf<0.) && 
        (momentum.E()/dpt_gsf) > 5. && momentum_gsf.pt() < 30.){
      Fe=momentum.E();
    }
    float scale= Fe/momentum.E();
    
    newmomentum.SetPxPyPzE(scale*momentum.Px(),
                   scale*momentum.Py(),
                   scale*momentum.Pz(),Fe);
    if( DebugIDCandidates ) 
      cout << "SetCandidates::(nhit_gsf>7) || (has_kf==false)  " << newmomentum.pt() << " Ene " <<  Fe <<endl;
    
    
      }
      if (newmomentum.pt()>0.5){
    
    // the pf candidate are created: we need to set something more? 
    // IMPORTANT -> We need the gsftrackRef, not only the TrackRef??

    if( DebugIDCandidates )
      cout << "SetCandidates:: I am before doing candidate " <<endl;
    
    //vector with the cluster energies (for the extra)
    std::vector<float> clusterEnergyVec;
    clusterEnergyVec.push_back(RawEene);
    clusterEnergyVec.insert(clusterEnergyVec.end(),bremEnergyVec.begin(),bremEnergyVec.end());

    // add the information in the extra
    std::vector<reco::PFCandidateElectronExtra>::iterator itextra;
    PFElectronExtraEqual myExtraEqual(RefGSF);
    itextra=find_if(electronExtra_.begin(),electronExtra_.end(),myExtraEqual);
    if(itextra!=electronExtra_.end()) {
      itextra->setClusterEnergies(clusterEnergyVec);
    }
    else {
      if(RawEene>0.) 
        std::cout << " There is a big problem with the electron extra, PFElectronAlgo should crash soon " << RawEene << std::endl;
    }

    reco::PFCandidate::ParticleType particleType 
      = reco::PFCandidate::e;
    reco::PFCandidate temp_Candidate;
    temp_Candidate = PFCandidate(charge,newmomentum,particleType);
    temp_Candidate.set_mva_e_pi(BDToutput_[cgsf]);
    temp_Candidate.setEcalEnergy(RawEene,Eene);
    // Note the Hcal energy is set but the element is never locked 
    temp_Candidate.setHcalEnergy(Hene,Hene);  
    temp_Candidate.setPs1Energy(ps1TotEne);
    temp_Candidate.setPs2Energy(ps2TotEne);
    temp_Candidate.setTrackRef(RefKF);   
    // This reference could be NULL it is needed a protection? 
    temp_Candidate.setGsfTrackRef(RefGSF);
    temp_Candidate.setPositionAtECALEntrance(posGsfEcalEntrance);
    // Add Vertex
    temp_Candidate.setVertexSource(PFCandidate::kGSFVertex);
    
    // save the superclusterRef when available
    if(RefGSF->extra().isAvailable() && RefGSF->extra()->seedRef().isAvailable()) {
      reco::ElectronSeedRef seedRef=  RefGSF->extra()->seedRef().castTo<reco::ElectronSeedRef>();
      if(seedRef.isAvailable() && seedRef->isEcalDriven()) {
        reco::SuperClusterRef scRef = seedRef->caloCluster().castTo<reco::SuperClusterRef>();
        if(scRef.isNonnull())  
          temp_Candidate.setSuperClusterRef(scRef);
      }
    }

    if( DebugIDCandidates ) 
      cout << "SetCandidates:: I am after doing candidate " <<endl;
    
    for (unsigned int elad=0; elad<elementsToAdd.size();elad++){
      temp_Candidate.addElementInBlock(blockRef,elementsToAdd[elad]);
    }

    // now add the photons to this candidate
    std::map<unsigned int, std::vector<reco::PFCandidate> >::const_iterator itcluster=
      electronConstituents_.find(cgsf);
    if(itcluster!=electronConstituents_.end())
      {
        const std::vector<reco::PFCandidate> & theClusters=itcluster->second;
        unsigned nclus=theClusters.size();
        //      std::cout << " PFElectronAlgo " << nclus << " daugthers to add" << std::endl;
        for(unsigned iclus=0;iclus<nclus;++iclus)
          {
        temp_Candidate.addDaughter(theClusters[iclus]);
          }
      }

    // By-pass the mva is the electron has been pre-selected 
    bool bypassmva=false;
    if(useEGElectrons_) {
      GsfElectronEqual myEqual(RefGSF);
      std::vector<reco::GsfElectron>::const_iterator itcheck=find_if(theGsfElectrons_->begin(),theGsfElectrons_->end(),myEqual);
      if(itcheck!=theGsfElectrons_->end()) {
        if(BDToutput_[cgsf] >= -1.)  {
          // bypass the mva only if the reconstruction went fine
          bypassmva=true;

          if( DebugIDCandidates ) {
            if(BDToutput_[cgsf] < -0.1) {
          float esceg = itcheck->caloEnergy();      
          cout << " Attention By pass the mva " << BDToutput_[cgsf] 
               << " SuperClusterEnergy " << esceg
               << " PF Energy " << Eene << endl;
          
          cout << " hoe " << itcheck->hcalOverEcal()
               << " tkiso04 " << itcheck->dr04TkSumPt()
               << " ecaliso04 " << itcheck->dr04EcalRecHitSumEt()
               << " hcaliso04 " << itcheck->dr04HcalTowerSumEt()
               << " tkiso03 " << itcheck->dr03TkSumPt()
               << " ecaliso03 " << itcheck->dr03EcalRecHitSumEt()
               << " hcaliso03 " << itcheck->dr03HcalTowerSumEt() << endl;
        }
          } // end DebugIDCandidates
        }
      }
    }
    
    bool mvaSelected = (BDToutput_[cgsf] >=  mvaEleCut_);
    if( mvaSelected || bypassmva )    {
        elCandidate_.push_back(temp_Candidate);
        if(itextra!=electronExtra_.end()) 
          itextra->setStatus(PFCandidateElectronExtra::Selected,true);
      }
    else      {
      if(itextra!=electronExtra_.end()) 
        itextra->setStatus(PFCandidateElectronExtra::Rejected,true);
    }
    allElCandidate_.push_back(temp_Candidate);
    
    // save the status information
    if(itextra!=electronExtra_.end()) {
      itextra->setStatus(PFCandidateElectronExtra::ECALDrivenPreselected,bypassmva);
      itextra->setStatus(PFCandidateElectronExtra::MVASelected,mvaSelected);
    }
    

      }
      else {
    BDToutput_[cgsf] = -1.;   // if the momentum is < 0.5 ID = false, but not sure
    // it could be misleading. 
    if( DebugIDCandidates ) 
      cout << "SetCandidates:: No Candidate Produced because of Pt cut: 0.5 " <<endl;
      }
    } 
    else {
      BDToutput_[cgsf] = -1.;  // if gsf ref does not exist
      if( DebugIDCandidates ) 
    cout << "SetCandidates:: No Candidate Produced because of No GSF Track Ref " <<endl;
    }
  } // End Loop On GSF tracks
  return;
}
// // This function get the associatedToGsf and associatedToBrems maps and for each pfelectron candidate 
// // the element used are set active == false. 
// // note: the HCAL cluster are not used for the moments and also are not locked. 
void PFElectronAlgo::SetActive(const reco::PFBlockRef&  blockRef,
                     AssMap& associatedToGsf_,
                     AssMap& associatedToBrems_,
                     AssMap& associatedToEcal_,
                     std::vector<bool>& active){
  const reco::PFBlock& block = *blockRef;
  PFBlock::LinkData linkData =  block.linkData();  
   
  const edm::OwnVector< reco::PFBlockElement >&  elements = block.elements();
  
  unsigned int cgsf=0;
  for (map<unsigned int,vector<unsigned int> >::iterator igsf = associatedToGsf_.begin();
       igsf != associatedToGsf_.end(); igsf++,cgsf++) {

    unsigned int gsf_index =  igsf->first;
    const reco::PFBlockElementGsfTrack * GsfEl  =  
      dynamic_cast<const reco::PFBlockElementGsfTrack*>((&elements[gsf_index]));
    reco::GsfTrackRef RefGSF = GsfEl->GsftrackRef();

    // lock only the elements that pass the BDT cut
    bool bypassmva=false;
    if(useEGElectrons_) {
      GsfElectronEqual myEqual(RefGSF);
      std::vector<reco::GsfElectron>::const_iterator itcheck=find_if(theGsfElectrons_->begin(),theGsfElectrons_->end(),myEqual);
      if(itcheck!=theGsfElectrons_->end()) {
    if(BDToutput_[cgsf] >= -1.) 
      bypassmva=true;
      }
    }

    if(BDToutput_[cgsf] < mvaEleCut_ && bypassmva == false) continue;

    
    active[gsf_index] = false;  // lock the gsf
    vector<unsigned int> assogsf_index = igsf->second;
    for  (unsigned int ielegsf=0;ielegsf<assogsf_index.size();ielegsf++) {
      PFBlockElement::Type assoele_type = elements[(assogsf_index[ielegsf])].type();
      // lock the elements associated to the gsf: ECAL, Brems
      active[(assogsf_index[ielegsf])] = false;  
      if (assoele_type == reco::PFBlockElement::ECAL) {
    unsigned int keyecalgsf = assogsf_index[ielegsf];

    // added protection against fifth step
    if(fifthStepKfTrack_.size() > 0) {
      for(unsigned int itr = 0; itr < fifthStepKfTrack_.size(); itr++) {
        if(fifthStepKfTrack_[itr].first == keyecalgsf) {
          active[(fifthStepKfTrack_[itr].second)] = false;
        }
      }
    }

    // added locking for conv gsf tracks and kf tracks
    if(convGsfTrack_.size() > 0) {
      for(unsigned int iconv = 0; iconv < convGsfTrack_.size(); iconv++) {
        if(convGsfTrack_[iconv].first == keyecalgsf) {
          // lock the GSF track
          active[(convGsfTrack_[iconv].second)] = false;
          // lock also the KF track associated
          std::multimap<double, unsigned> convKf;
          block.associatedElements( convGsfTrack_[iconv].second,
                    linkData,
                    convKf,
                    reco::PFBlockElement::TRACK,
                    reco::PFBlock::LINKTEST_ALL );
          if(convKf.size() > 0) {
        active[convKf.begin()->second] = false;
          }
        }
      }
    }


    vector<unsigned int> assoecalgsf_index = associatedToEcal_.find(keyecalgsf)->second;
    for(unsigned int ips =0; ips<assoecalgsf_index.size();ips++) {
      // lock the elements associated to ECAL: PS1,PS2, for the moment not HCAL
      if  (elements[(assoecalgsf_index[ips])].type() == reco::PFBlockElement::PS1) 
        active[(assoecalgsf_index[ips])] = false;
      if  (elements[(assoecalgsf_index[ips])].type() == reco::PFBlockElement::PS2) 
        active[(assoecalgsf_index[ips])] = false;
      if  (elements[(assoecalgsf_index[ips])].type() == reco::PFBlockElement::TRACK) {
        if(lockExtraKf_[cgsf] == true) {          
          active[(assoecalgsf_index[ips])] = false;
        }
      }
    }
      } // End if ECAL
      if (assoele_type == reco::PFBlockElement::BREM) {
    unsigned int brem_index = assogsf_index[ielegsf];
    vector<unsigned int> assobrem_index = associatedToBrems_.find(brem_index)->second;
    for (unsigned int ibrem = 0; ibrem < assobrem_index.size(); ibrem++){
      if (elements[(assobrem_index[ibrem])].type() == reco::PFBlockElement::ECAL) {
        unsigned int keyecalbrem = assobrem_index[ibrem];
        // lock the ecal cluster associated to the brem
        active[(assobrem_index[ibrem])] = false;

        // add protection against fifth step
        if(fifthStepKfTrack_.size() > 0) {
          for(unsigned int itr = 0; itr < fifthStepKfTrack_.size(); itr++) {
        if(fifthStepKfTrack_[itr].first == keyecalbrem) {
          active[(fifthStepKfTrack_[itr].second)] = false;
        }
          }
        }

        vector<unsigned int> assoelebrem_index = associatedToEcal_.find(keyecalbrem)->second;
        // lock the elements associated to ECAL: PS1,PS2, for the moment not HCAL
        for (unsigned int ielebrem=0; ielebrem<assoelebrem_index.size();ielebrem++) {
          if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS1) 
        active[(assoelebrem_index[ielebrem])] = false;
          if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS2) 
        active[(assoelebrem_index[ielebrem])] = false;
        }
      }
    }
      } // End if BREM    
    } // End loop on elements from gsf track
  }  // End loop on gsf track  
  return;
}
void PFElectronAlgo::setEGElectronCollection(const reco::GsfElectronCollection & egelectrons) {
  theGsfElectrons_ = & egelectrons;
}
unsigned int PFElectronAlgo::whichTrackAlgo(const reco::TrackRef& trackRef) {
  unsigned int Algo = 0; 
  switch (trackRef->algo()) {
  case TrackBase::ctf:
  case TrackBase::initialStep:
  case TrackBase::lowPtTripletStep:
  case TrackBase::pixelPairStep:
  case TrackBase::jetCoreRegionalStep:
  case TrackBase::muonSeededStepInOut:
  case TrackBase::muonSeededStepOutIn:
    Algo = 0;
    break;
  case TrackBase::detachedTripletStep:
    Algo = 1;
    break;
  case TrackBase::mixedTripletStep:
    Algo = 2;
    break;
  case TrackBase::pixelLessStep:
    Algo = 3;
    break;
  case TrackBase::tobTecStep:
    Algo = 4;
    break;
  default:
    Algo = 5;
    break;
  }
  return Algo;
}
bool PFElectronAlgo::isPrimaryTrack(const reco::PFBlockElementTrack& KfEl,
                    const reco::PFBlockElementGsfTrack& GsfEl) {
  bool isPrimary = false;
  
  GsfPFRecTrackRef gsfPfRef = GsfEl.GsftrackRefPF();
  
  if(gsfPfRef.isNonnull()) {
    PFRecTrackRef  kfPfRef = KfEl.trackRefPF();
    PFRecTrackRef  kfPfRef_fromGsf = (*gsfPfRef).kfPFRecTrackRef();
    if(kfPfRef.isNonnull() && kfPfRef_fromGsf.isNonnull()) {
      reco::TrackRef kfref= (*kfPfRef).trackRef();
      reco::TrackRef kfref_fromGsf = (*kfPfRef_fromGsf).trackRef();
      if(kfref.isNonnull() && kfref_fromGsf.isNonnull()) {
    if(kfref ==  kfref_fromGsf)
      isPrimary = true;
      }
    }
  }

  return isPrimary;
}