/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/RecoParticleFlow/PFProducer/src/PFEGammaAlgo.cc

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//
// Original Authors: Fabian Stoeckli: fabian.stoeckli@cern.ch
//                   Nicholas Wardle: nckw@cern.ch
//                   Rishi Patel rpatel@cern.ch(ongoing developer and maintainer)
//

#include "RecoParticleFlow/PFProducer/interface/PFEGammaAlgo.h"
#include "RecoParticleFlow/PFProducer/interface/PFMuonAlgo.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementBrem.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFraction.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFwd.h" 
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
#include "DataFormats/ParticleFlowReco/interface/PFClusterFwd.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementSuperCluster.h"
#include "DataFormats/EgammaReco/interface/ElectronSeed.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/EcalDetId/interface/EBDetId.h"
#include "DataFormats/EcalDetId/interface/EEDetId.h"
#include "DataFormats/EgammaCandidates/interface/Photon.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFEnergyCalibration.h"
#include "RecoParticleFlow/PFClusterTools/interface/PFPhotonClusters.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 "RecoParticleFlow/PFProducer/interface/PFElectronExtraEqual.h"
#include "RecoEcal/EgammaCoreTools/interface/Mustache.h"
#include "DataFormats/Math/interface/deltaPhi.h"
#include "DataFormats/Math/interface/deltaR.h"
#include <TFile.h>
#include <iomanip>
#include <algorithm>
#include <TMath.h>
using namespace std;
using namespace reco;


PFEGammaAlgo::PFEGammaAlgo(const double mvaEleCut,
                           std::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,
                           std::string mvaweightfile,  
                           double mvaConvCut, 
                           bool useReg, 
                           std::string X0_Map,
                           const reco::Vertex& primary,
                           double sumPtTrackIsoForPhoton,
                           double sumPtTrackIsoSlopeForPhoton
                           ) : 
  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),  
  isvalid_(false), 
  verbosityLevel_(Silent), 
  MVACUT(mvaConvCut),
  useReg_(useReg),
  sumPtTrackIsoForPhoton_(sumPtTrackIsoForPhoton),
  sumPtTrackIsoSlopeForPhoton_(sumPtTrackIsoSlopeForPhoton),
  nlost(0.0), nlayers(0.0),
  chi2(0.0), STIP(0.0), del_phi(0.0),HoverPt(0.0), EoverPt(0.0), track_pt(0.0),
  mvaValue(0.0),
  CrysPhi_(0.0), CrysEta_(0.0),  VtxZ_(0.0), ClusPhi_(0.0), ClusEta_(0.0),
  ClusR9_(0.0), Clus5x5ratio_(0.0),  PFCrysEtaCrack_(0.0), logPFClusE_(0.0), e3x3_(0.0),
  CrysIPhi_(0), CrysIEta_(0),
  CrysX_(0.0), CrysY_(0.0),
  EB(0.0),
  eSeed_(0.0), e1x3_(0.0),e3x1_(0.0), e1x5_(0.0), e2x5Top_(0.0),  e2x5Bottom_(0.0), e2x5Left_(0.0),  e2x5Right_(0.0),
  etop_(0.0), ebottom_(0.0), eleft_(0.0), eright_(0.0),
  e2x5Max_(0.0),
  PFPhoEta_(0.0), PFPhoPhi_(0.0), PFPhoR9_(0.0), PFPhoR9Corr_(0.0), SCPhiWidth_(0.0), SCEtaWidth_(0.0), 
  PFPhoEt_(0.0), RConv_(0.0), PFPhoEtCorr_(0.0), PFPhoE_(0.0), PFPhoECorr_(0.0), MustE_(0.0), E3x3_(0.0),
  dEta_(0.0), dPhi_(0.0), LowClusE_(0.0), RMSAll_(0.0), RMSMust_(0.0), nPFClus_(0.0),
  TotPS1_(0.0), TotPS2_(0.0),
  nVtx_(0.0),
  x0inner_(0.0), x0middle_(0.0), x0outer_(0.0),
  excluded_(0.0), Mustache_EtRatio_(0.0), Mustache_Et_out_(0.0)
{  

  
  // Set the tmva reader for electrons
  tmvaReaderEle_ = new TMVA::Reader("!Color:Silent");
  tmvaReaderEle_->AddVariable("lnPt_gsf",&lnPt_gsf);
  tmvaReaderEle_->AddVariable("Eta_gsf",&Eta_gsf);
  tmvaReaderEle_->AddVariable("dPtOverPt_gsf",&dPtOverPt_gsf);
  tmvaReaderEle_->AddVariable("DPtOverPt_gsf",&DPtOverPt_gsf);
  //tmvaReaderEle_->AddVariable("nhit_gsf",&nhit_gsf);
  tmvaReaderEle_->AddVariable("chi2_gsf",&chi2_gsf);
  //tmvaReaderEle_->AddVariable("DPtOverPt_kf",&DPtOverPt_kf);
  tmvaReaderEle_->AddVariable("nhit_kf",&nhit_kf);
  tmvaReaderEle_->AddVariable("chi2_kf",&chi2_kf);
  tmvaReaderEle_->AddVariable("EtotPinMode",&EtotPinMode);
  tmvaReaderEle_->AddVariable("EGsfPoutMode",&EGsfPoutMode);
  tmvaReaderEle_->AddVariable("EtotBremPinPoutMode",&EtotBremPinPoutMode);
  tmvaReaderEle_->AddVariable("DEtaGsfEcalClust",&DEtaGsfEcalClust);
  tmvaReaderEle_->AddVariable("SigmaEtaEta",&SigmaEtaEta);
  tmvaReaderEle_->AddVariable("HOverHE",&HOverHE);
//   tmvaReaderEle_->AddVariable("HOverPin",&HOverPin);
  tmvaReaderEle_->AddVariable("lateBrem",&lateBrem);
  tmvaReaderEle_->AddVariable("firstBrem",&firstBrem);
  tmvaReaderEle_->BookMVA("BDT",mvaWeightFileEleID.c_str());
  
  
    //Book MVA  
    tmvaReader_ = new TMVA::Reader("!Color:Silent");  
    tmvaReader_->AddVariable("del_phi",&del_phi);  
    tmvaReader_->AddVariable("nlayers", &nlayers);  
    tmvaReader_->AddVariable("chi2",&chi2);  
    tmvaReader_->AddVariable("EoverPt",&EoverPt);  
    tmvaReader_->AddVariable("HoverPt",&HoverPt);  
    tmvaReader_->AddVariable("track_pt", &track_pt);  
    tmvaReader_->AddVariable("STIP",&STIP);  
    tmvaReader_->AddVariable("nlost", &nlost);  
    tmvaReader_->BookMVA("BDT",mvaweightfile.c_str());  

    //Material Map
    TFile *XO_File = new TFile(X0_Map.c_str(),"READ");
    X0_sum=(TH2D*)XO_File->Get("TrackerSum");
    X0_inner = (TH2D*)XO_File->Get("Inner");
    X0_middle = (TH2D*)XO_File->Get("Middle");
    X0_outer = (TH2D*)XO_File->Get("Outer");
    
}

void PFEGammaAlgo::RunPFEG(const reco::PFBlockRef&  blockRef,
                               std::vector<bool>& active
){
  
  // should be cleaned as often as often as possible
//   elCandidate_.clear();
//   electronExtra_.clear();
//   allElCandidate_.clear();
  //electronConstituents_.clear();
  fifthStepKfTrack_.clear();
  convGsfTrack_.clear();
  
  egCandidate_.clear();
  egExtra_.clear();
  
  //std::cout<<" calling RunPFPhoton "<<std::endl;
  
  /*      For now we construct the PhotonCandidate simply from 
          a) adding the CORRECTED energies of each participating ECAL cluster
          b) build the energy-weighted direction for the Photon
  */


  // define how much is printed out for debugging.
  // ... will be setable via CFG file parameter
  verbosityLevel_ = Chatty;          // Chatty mode.
  

  // loop over all elements in the Block
  const edm::OwnVector< reco::PFBlockElement >&          elements         = blockRef->elements();
  edm::OwnVector< reco::PFBlockElement >::const_iterator ele              = elements.begin();
  std::vector<bool>::const_iterator                      actIter          = active.begin();
  PFBlock::LinkData                                      linkData         = blockRef->linkData();
  bool                                                   isActive         = true;


  if(elements.size() != active.size()) {
    // throw excpetion...
    //std::cout<<" WARNING: Size of collection and active-vectro don't agree!"<<std::endl;
    return;
  }
  
  //build large set of association maps between gsf/kf tracks, PFClusters and SuperClusters
  //this function originally came from the PFElectronAlgo
  // the maps are initialized 
  AssMap associatedToGsf;
  AssMap associatedToBrems;
  AssMap associatedToEcal;  
  
  //bool blockHasGSF =  
  SetLinks(blockRef,associatedToGsf,
                            associatedToBrems,associatedToEcal,
                            active, *primaryVertex_);
  
  //printf("blockHasGsf = %i\n",int(blockHasGSF));
  
  
  // local vecotr to keep track of the indices of the 'elements' for the Photon candidate
  // once we decide to keep the candidate, the 'active' entriesd for them must be set to false
  std::vector<unsigned int> elemsToLock;
  elemsToLock.resize(0);
  
  for( ; ele != elements.end(); ++ele, ++actIter ) {

    // if it's not a SuperCluster, go to the next element
    if( !( ele->type() == reco::PFBlockElement::SC ) ) continue;
    
    //printf("supercluster\n");
    
    // Photon kienmatics, will be updated for each identified participating element
    float photonEnergy_        =   0.;
    float photonX_             =   0.;
    float photonY_             =   0.;
    float photonZ_             =   0.;
    float RawEcalEne           =   0.;

    // Total pre-shower energy
    float ps1TotEne      = 0.;
    float ps2TotEne      = 0.;
    
    bool hasConvTrack=false;  
    bool hasSingleleg=false;  
    std::vector<unsigned int> AddClusters(0);  
    std::vector<unsigned int> IsoTracks(0);  
    std::multimap<unsigned int, unsigned int>ClusterAddPS1;  
    std::multimap<unsigned int, unsigned int>ClusterAddPS2;
    std::vector<reco::TrackRef>singleLegRef;
    std::vector<float>MVA_values(0);
    std::vector<float>MVALCorr;
    std::vector<CaloCluster>PFClusters;
    reco::ConversionRefVector ConversionsRef_;
    isActive = *(actIter);
    //cout << " Found a SuperCluster.  Energy " ;
    const reco::PFBlockElementSuperCluster *sc = dynamic_cast<const reco::PFBlockElementSuperCluster*>(&(*ele));
    //std::cout << sc->superClusterRef()->energy () << " Track/Ecal/Hcal Iso " << sc->trackIso()<< " " << sc->ecalIso() ;
    //std::cout << " " << sc->hcalIso() <<std::endl;
    //if (!(sc->fromPhoton()))continue;
    
    // check the status of the SC Element... 
    // ..... I understand it should *always* be active, since PFElectronAlgo does not touch this (yet?) RISHI: YES
    if( !isActive ) {
      //std::cout<<" SuperCluster is NOT active.... "<<std::endl;
      continue;
    }
    elemsToLock.push_back(ele-elements.begin()); //add SC to elements to lock
    // loop over its constituent ECAL cluster
    std::multimap<double, unsigned int> ecalAssoPFClusters;
    blockRef->associatedElements( ele-elements.begin(), 
                                  linkData,
                                  ecalAssoPFClusters,
                                  reco::PFBlockElement::ECAL,
                                  reco::PFBlock::LINKTEST_ALL );
    //R9 of SuperCluster and RawE
    //PFPhoR9_=sc->photonRef()->r9();
    PFPhoR9_=1.0;
    E3x3_=PFPhoR9_*(sc->superClusterRef()->rawEnergy());
    // loop over the ECAL clusters linked to the iEle 
    if( ! ecalAssoPFClusters.size() ) {
      // This SC element has NO ECAL elements asigned... *SHOULD NOT HAPPEN*
      //std::cout<<" Found SC element with no ECAL assigned "<<std::endl;
      continue;
    }
    
    //list of matched gsf tracks associated to this supercluster through
    //a shared PFCluster
    //std::set<unsigned int> matchedGsf;
    std::vector<unsigned int> matchedGsf;
    for (map<unsigned int,vector<unsigned int> >::iterator igsf = associatedToGsf.begin();
       igsf != associatedToGsf.end(); igsf++) {    
      
      bool matched = false;
      if( !( active[igsf->first] ) ) continue;
    
      vector<unsigned int> assogsf_index = igsf->second;
      for  (unsigned int ielegsf=0;ielegsf<assogsf_index.size();ielegsf++) {
        unsigned int associdx = assogsf_index[ielegsf];
        
        if( !( active[associdx] ) ) continue;
        
        PFBlockElement::Type assoele_type = elements[associdx].type();
        
        if(assoele_type == reco::PFBlockElement::ECAL) {
          for(std::multimap<double, unsigned int>::iterator itecal = ecalAssoPFClusters.begin(); 
            itecal != ecalAssoPFClusters.end(); ++itecal) {
            
            if (itecal->second==associdx) {
              matchedGsf.push_back(igsf->first);
              matched = true;
              break;
            }
          }
        }
          
        if (matched) break;
      }
      
    }
    
   //printf("matchedGsf size = %i\n",int(matchedGsf.size()));

      
    // This is basically CASE 2
    // .... we loop over all ECAL cluster linked to each other by this SC
    for(std::multimap<double, unsigned int>::iterator itecal = ecalAssoPFClusters.begin(); 
        itecal != ecalAssoPFClusters.end(); ++itecal) { 
      
      //printf("ecal cluster\n");
      
      //loop over associated elements to check for gsf
      
//       std::map<unsigned int, std::vector<unsigned int> >::const_iterator assoc_ecal_it = associatedToEcal.find(itecal->second);
//       if (assoc_ecal_it!=associatedToEcal.end()) {
//      const std::vector<unsigned int> &assoecal_index = assoc_ecal_it->second;
//      for  (unsigned int iecalassoc=0;iecalassoc<assoecal_index.size();iecalassoc++) {
//        int associdx = assoecal_index[iecalassoc];
//        PFBlockElement::Type assoele_type = elements[associdx].type();
//        // lock the elements associated to the gsf: ECAL, Brems
//        //active[(assogsf_index[ielegsf])] = false;  
//        printf("matched element to ecal cluster, type = %i\n",int(assoele_type));
//        
//        if (assoele_type == reco::PFBlockElement::GSF) {      
//          printf("matched gsf\n");
//          if (!matchedGsf.count(associdx)) {
//            matchedGsf.insert(associdx);
//          }
//        }
//      }
//       }
      

      
      // to get the reference to the PF clusters, this is needed.
      reco::PFClusterRef clusterRef = elements[itecal->second].clusterRef();    
      
    
    
    
      // from the clusterRef get the energy, direction, etc
      //      float ClustRawEnergy = clusterRef->energy();
      //      float ClustEta = clusterRef->position().eta();
      //      float ClustPhi = clusterRef->position().phi();
      
      // initialize the vectors for the PS energies
      vector<double> ps1Ene(0);
      vector<double> ps2Ene(0);
      double ps1=0;  
      double ps2=0;  
      hasSingleleg=false;  
      hasConvTrack=false;
      
      /*
        cout << " My cluster index " << itecal->second 
        << " energy " <<  ClustRawEnergy
           << " eta " << ClustEta
           << " phi " << ClustPhi << endl;
      */
      // check if this ECAL element is still active (could have been eaten by PFElectronAlgo)
      // ......for now we give the PFElectron Algo *ALWAYS* Shot-Gun on the ECAL elements to the PFElectronAlgo
      
      if( !( active[itecal->second] ) ) {
        //std::cout<< "  .... this ECAL element is NOT active anymore. Is skipped. "<<std::endl;
        continue;
      }
      
      // ------------------------------------------------------------------------------------------
      // TODO: do some tests on the ECAL cluster itself, deciding to use it or not for the Photons
      // ..... ??? Do we need this?
      if ( false ) {
        // Check if there are a large number tracks that do not pass pre-ID around this ECAL cluster
        bool useIt = true;
        int mva_reject=0;  
        bool isClosest=false;  
        std::multimap<double, unsigned int> Trackscheck;  
        blockRef->associatedElements( itecal->second,  
                                      linkData,  
                                      Trackscheck,  
                                      reco::PFBlockElement::TRACK,  
                                      reco::PFBlock::LINKTEST_ALL);  
        for(std::multimap<double, unsigned int>::iterator track = Trackscheck.begin();  
            track != Trackscheck.end(); ++track) {  
           
          // first check if is it's still active  
          if( ! (active[track->second]) ) continue;  
          hasSingleleg=EvaluateSingleLegMVA(blockRef,  *primaryVertex_, track->second);  
          //check if it is the closest linked track  
          std::multimap<double, unsigned int> closecheck;  
          blockRef->associatedElements(track->second,  
                                       linkData,  
                                       closecheck,  
                                       reco::PFBlockElement::ECAL,  
                                       reco::PFBlock::LINKTEST_ALL);  
          if(closecheck.begin()->second ==itecal->second)isClosest=true;  
          if(!hasSingleleg)mva_reject++;  
        }  
        
        if(mva_reject>0 &&  isClosest)useIt=false;  
        //if(mva_reject==1 && isClosest)useIt=false;
        if( !useIt ) continue;    // Go to next ECAL cluster within SC
      }
      // ------------------------------------------------------------------------------------------
      
      // We decided to keep the ECAL cluster for this Photon Candidate ...
      elemsToLock.push_back(itecal->second);
      
      // look for PS in this Block linked to this ECAL cluster      
      std::multimap<double, unsigned int> PS1Elems;
      std::multimap<double, unsigned int> PS2Elems;
      //PS Layer 1 linked to ECAL cluster
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    PS1Elems,
                                    reco::PFBlockElement::PS1,
                                    reco::PFBlock::LINKTEST_ALL );
      //PS Layer 2 linked to the ECAL cluster
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    PS2Elems,
                                    reco::PFBlockElement::PS2,
                                    reco::PFBlock::LINKTEST_ALL );
      
      // loop over all PS1 and compute energy
      for(std::multimap<double, unsigned int>::iterator iteps = PS1Elems.begin();
          iteps != PS1Elems.end(); ++iteps) {

        // first chekc if it's still active
        if( !(active[iteps->second]) ) continue;
        
        //Check if this PS1 is not closer to another ECAL cluster in this Block          
        std::multimap<double, unsigned int> ECALPS1check;  
        blockRef->associatedElements( iteps->second,  
                                      linkData,  
                                      ECALPS1check,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL );  
        if(itecal->second==ECALPS1check.begin()->second)//then it is closest linked  
          {
            reco::PFClusterRef ps1ClusterRef = elements[iteps->second].clusterRef();
            ps1Ene.push_back( ps1ClusterRef->energy() );
            ps1=ps1+ps1ClusterRef->energy(); //add to total PS1
            // incativate this PS1 Element
            elemsToLock.push_back(iteps->second);
          }
      }
      for(std::multimap<double, unsigned int>::iterator iteps = PS2Elems.begin();
          iteps != PS2Elems.end(); ++iteps) {

        // first chekc if it's still active
        if( !(active[iteps->second]) ) continue;
        
        // Check if this PS2 is not closer to another ECAL cluster in this Block:
        std::multimap<double, unsigned int> ECALPS2check;  
        blockRef->associatedElements( iteps->second,  
                                      linkData,  
                                      ECALPS2check,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL );  
        if(itecal->second==ECALPS2check.begin()->second)//is closest linked  
          {
            reco::PFClusterRef ps2ClusterRef = elements[iteps->second].clusterRef();
            ps2Ene.push_back( ps2ClusterRef->energy() );
            ps2=ps2ClusterRef->energy()+ps2; //add to total PS2
            // incativate this PS2 Element
            elemsToLock.push_back(iteps->second);
          }
      }
            
      // loop over the HCAL Clusters linked to the ECAL cluster (CASE 6)
      std::multimap<double, unsigned int> hcalElems;
      blockRef->associatedElements( itecal->second,linkData,
                                    hcalElems,
                                    reco::PFBlockElement::HCAL,
                                    reco::PFBlock::LINKTEST_ALL );

      for(std::multimap<double, unsigned int>::iterator ithcal = hcalElems.begin();
          ithcal != hcalElems.end(); ++ithcal) {

        if ( ! (active[ithcal->second] ) ) continue; // HCAL Cluster already used....
        
        // TODO: Decide if this HCAL cluster is to be used
        // .... based on some Physics
        // .... To we need to check if it's closer to any other ECAL/TRACK?

        bool useHcal = false;
        if ( !useHcal ) continue;
        //not locked
        //elemsToLock.push_back(ithcal->second);
      }

      // This is entry point for CASE 3.
      // .... we loop over all Tracks linked to this ECAL and check if it's labeled as conversion
      // This is the part for looping over all 'Conversion' Tracks
      std::multimap<double, unsigned int> convTracks;
      blockRef->associatedElements( itecal->second,
                                    linkData,
                                    convTracks,
                                    reco::PFBlockElement::TRACK,
                                    reco::PFBlock::LINKTEST_ALL);
      for(std::multimap<double, unsigned int>::iterator track = convTracks.begin();
          track != convTracks.end(); ++track) {

        // first check if is it's still active
        if( ! (active[track->second]) ) continue;
        
        // check if it's a CONV track
        const reco::PFBlockElementTrack * trackRef = dynamic_cast<const reco::PFBlockElementTrack*>((&elements[track->second]));        
        
        //Check if track is a Single leg from a Conversion  
        mvaValue=-999;  
        hasSingleleg=EvaluateSingleLegMVA(blockRef,  *primaryVertex_, track->second);

        // Daniele; example for mvaValues, do the same for single leg trackRef and convRef
        //          
        //      if(hasSingleleg)
        //        mvaValues.push_back(mvaValue);

        //If it is not then it will be used to check Track Isolation at the end  
        if(!hasSingleleg)  
          {  
            bool included=false;  
            //check if this track is already included in the vector so it is linked to an ECAL cluster that is already examined  
            for(unsigned int i=0; i<IsoTracks.size(); i++)  
              {if(IsoTracks[i]==track->second)included=true;}  
            if(!included)IsoTracks.push_back(track->second);  
          }  
        //For now only Pre-ID tracks that are not already identified as Conversions  
        if(hasSingleleg &&!(trackRef->trackType(reco::PFBlockElement::T_FROM_GAMMACONV)))  
          {  
            elemsToLock.push_back(track->second);
            
            reco::TrackRef t_ref=elements[track->second].trackRef();
            bool matched=false;
            for(unsigned int ic=0; ic<singleLegRef.size(); ic++)
              if(singleLegRef[ic]==t_ref)matched=true;
            
            if(!matched){
              singleLegRef.push_back(t_ref);
              MVA_values.push_back(mvaValue);
            }
            //find all the clusters linked to this track  
            std::multimap<double, unsigned int> moreClusters;  
            blockRef->associatedElements( track->second,  
                                          linkData,  
                                          moreClusters,  
                                          reco::PFBlockElement::ECAL,  
                                          reco::PFBlock::LINKTEST_ALL);  
             
            float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x() * elements[track->second].trackRef()->innerMomentum().x() +  
                            elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                            elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
            float linked_E=0;  
            for(std::multimap<double, unsigned int>::iterator clust = moreClusters.begin();  
                clust != moreClusters.end(); ++clust)  
              {  
                if(!active[clust->second])continue;  
                //running sum of linked energy  
                linked_E=linked_E+elements[clust->second].clusterRef()->energy();  
                //prevent too much energy from being added  
                if(linked_E/p_in>1.5)break;  
                bool included=false;  
                //check if these ecal clusters are already included with the supercluster  
                for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                    cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
                  {  
                    if(cluscheck->second==clust->second)included=true;  
                  }  
                if(!included)AddClusters.push_back(clust->second);//Add to a container of clusters to be Added to the Photon candidate  
              }  
          }

        // Possibly need to be more smart about them (CASE 5)
        // .... for now we simply skip non id'ed tracks
        if( ! (trackRef->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) ) ) continue;  
        hasConvTrack=true;  
        elemsToLock.push_back(track->second);
        //again look at the clusters linked to this track  
        //if(elements[track->second].convRef().isNonnull())
        //{         
        //  ConversionsRef_.push_back(elements[track->second].convRef());
        //}
        std::multimap<double, unsigned int> moreClusters;  
        blockRef->associatedElements( track->second,  
                                      linkData,  
                                      moreClusters,  
                                      reco::PFBlockElement::ECAL,  
                                      reco::PFBlock::LINKTEST_ALL);
        
        float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x() * elements[track->second].trackRef()->innerMomentum().x() +  
                        elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                        elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
        float linked_E=0;  
        for(std::multimap<double, unsigned int>::iterator clust = moreClusters.begin();  
            clust != moreClusters.end(); ++clust)  
          {  
            if(!active[clust->second])continue;  
            linked_E=linked_E+elements[clust->second].clusterRef()->energy();  
            if(linked_E/p_in>1.5)break;  
            bool included=false;  
            for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
              {  
                if(cluscheck->second==clust->second)included=true;  
              }  
            if(!included)AddClusters.push_back(clust->second);//again only add if it is not already included with the supercluster  
          }
        
        // we need to check for other TRACKS linked to this conversion track, that point possibly no an ECAL cluster not included in the SC
        // .... This is basically CASE 4.
        
        std::multimap<double, unsigned int> moreTracks;
        blockRef->associatedElements( track->second,
                                      linkData,
                                      moreTracks,
                                      reco::PFBlockElement::TRACK,
                                      reco::PFBlock::LINKTEST_ALL);
        
        for(std::multimap<double, unsigned int>::iterator track2 = moreTracks.begin();
            track2 != moreTracks.end(); ++track2) {
          
          // first check if is it's still active
          if( ! (active[track2->second]) ) continue;
          //skip over the 1st leg already found above  
          if(track->second==track2->second)continue;      
          // check if it's a CONV track
          const reco::PFBlockElementTrack * track2Ref = dynamic_cast<const reco::PFBlockElementTrack*>((&elements[track2->second]));    
          if( ! (track2Ref->trackType(reco::PFBlockElement::T_FROM_GAMMACONV) ) ) continue;  // Possibly need to be more smart about them (CASE 5)
          elemsToLock.push_back(track2->second);
          // so it's another active conversion track, that is in the Block and linked to the conversion track we already found
          // find the ECAL cluster linked to it...
          std::multimap<double, unsigned int> convEcalAll;
          blockRef->associatedElements( track2->second,
                                        linkData,
                                        convEcalAll,
                                        reco::PFBlockElement::ECAL,
                                        reco::PFBlock::LINKTEST_ALL);
          
          //create cleaned collection of associated ecal clusters restricted to subdetector of the seeding supercluster
          //This cleaning is needed since poorly reconstructed conversions can occasionally have the second track pointing
          //to the wrong subdetector
          std::multimap<double, unsigned int> convEcal;
          for(std::multimap<double, unsigned int>::iterator itecal = convEcalAll.begin(); 
              itecal != convEcalAll.end(); ++itecal) { 
                  
                  // to get the reference to the PF clusters, this is needed.
            reco::PFClusterRef clusterRef = elements[itecal->second].clusterRef();
            
            if (clusterRef->hitsAndFractions().at(0).first.subdetId()==sc->superClusterRef()->seed()->hitsAndFractions().at(0).first.subdetId()) {
              convEcal.insert(*itecal);
            }
          }
          
          float p_in=sqrt(elements[track->second].trackRef()->innerMomentum().x()*elements[track->second].trackRef()->innerMomentum().x()+
                          elements[track->second].trackRef()->innerMomentum().y()*elements[track->second].trackRef()->innerMomentum().y()+  
                          elements[track->second].trackRef()->innerMomentum().z()*elements[track->second].trackRef()->innerMomentum().z());  
          
          
          float linked_E=0;
          for(std::multimap<double, unsigned int>::iterator itConvEcal = convEcal.begin();
              itConvEcal != convEcal.end(); ++itConvEcal) {
            
            if( ! (active[itConvEcal->second]) ) continue;
            bool included=false;  
            for(std::multimap<double, unsigned int>::iterator cluscheck = ecalAssoPFClusters.begin();  
                cluscheck != ecalAssoPFClusters.end(); ++cluscheck)  
              {  
                if(cluscheck->second==itConvEcal->second)included=true;  
              }
            linked_E=linked_E+elements[itConvEcal->second].clusterRef()->energy();
            if(linked_E/p_in>1.5)break;
            if(!included){AddClusters.push_back(itConvEcal->second);
            }
            
            // it's still active, so we have to add it.
            // CAUTION: we don't care here if it's part of the SC or not, we include it anyways
            
            // loop over the HCAL Clusters linked to the ECAL cluster (CASE 6)
            std::multimap<double, unsigned int> hcalElems_conv;
            blockRef->associatedElements( itecal->second,linkData,
                                          hcalElems_conv,
                                          reco::PFBlockElement::HCAL,
                                          reco::PFBlock::LINKTEST_ALL );
            
            for(std::multimap<double, unsigned int>::iterator ithcal2 = hcalElems_conv.begin();
                ithcal2 != hcalElems_conv.end(); ++ithcal2) {
              
              if ( ! (active[ithcal2->second] ) ) continue; // HCAL Cluster already used....
              
              // TODO: Decide if this HCAL cluster is to be used
              // .... based on some Physics
              // .... To we need to check if it's closer to any other ECAL/TRACK?
              
              bool useHcal = true;
              if ( !useHcal ) continue;
              
              //elemsToLock.push_back(ithcal2->second);

            } // end of loop over HCAL clusters linked to the ECAL cluster from second CONVERSION leg
            
          } // end of loop over ECALs linked to second T_FROM_GAMMACONV
          
        } // end of loop over SECOND conversion leg

        // TODO: Do we need to check separatly if there are HCAL cluster linked to the track?
        
      } // end of loop over tracks
      
            
      // Calibrate the Added ECAL energy
      float addedCalibEne=0;
      float addedRawEne=0;
      std::vector<double>AddedPS1(0);
      std::vector<double>AddedPS2(0);  
      double addedps1=0;  
      double addedps2=0;  
      for(unsigned int i=0; i<AddClusters.size(); i++)  
        {  
          std::multimap<double, unsigned int> PS1Elems_conv;  
          std::multimap<double, unsigned int> PS2Elems_conv;  
          blockRef->associatedElements(AddClusters[i],  
                                       linkData,  
                                       PS1Elems_conv,  
                                       reco::PFBlockElement::PS1,  
                                       reco::PFBlock::LINKTEST_ALL );  
          blockRef->associatedElements( AddClusters[i],  
                                        linkData,  
                                        PS2Elems_conv,  
                                        reco::PFBlockElement::PS2,  
                                        reco::PFBlock::LINKTEST_ALL );  
           
          for(std::multimap<double, unsigned int>::iterator iteps = PS1Elems_conv.begin();  
              iteps != PS1Elems_conv.end(); ++iteps)  
            {  
              if(!active[iteps->second])continue;  
              std::multimap<double, unsigned int> PS1Elems_check;  
              blockRef->associatedElements(iteps->second,  
                                           linkData,  
                                           PS1Elems_check,  
                                           reco::PFBlockElement::ECAL,  
                                           reco::PFBlock::LINKTEST_ALL );  
              if(PS1Elems_check.begin()->second==AddClusters[i])  
                {  
                   
                  reco::PFClusterRef ps1ClusterRef = elements[iteps->second].clusterRef();  
                  AddedPS1.push_back(ps1ClusterRef->energy());  
                  addedps1=addedps1+ps1ClusterRef->energy();  
                  elemsToLock.push_back(iteps->second);  
                }  
            }  
           
          for(std::multimap<double, unsigned int>::iterator iteps = PS2Elems_conv.begin();  
              iteps != PS2Elems_conv.end(); ++iteps) {  
            if(!active[iteps->second])continue;  
            std::multimap<double, unsigned int> PS2Elems_check;  
            blockRef->associatedElements(iteps->second,  
                                         linkData,  
                                         PS2Elems_check,  
                                         reco::PFBlockElement::ECAL,  
                                         reco::PFBlock::LINKTEST_ALL );  
             
            if(PS2Elems_check.begin()->second==AddClusters[i])  
              {  
                reco::PFClusterRef ps2ClusterRef = elements[iteps->second].clusterRef();  
                AddedPS2.push_back(ps2ClusterRef->energy());  
                addedps2=addedps2+ps2ClusterRef->energy();  
                elemsToLock.push_back(iteps->second);  
              }  
          }  
          reco::PFClusterRef AddclusterRef = elements[AddClusters[i]].clusterRef();  
          addedRawEne = AddclusterRef->energy()+addedRawEne;  
          addedCalibEne = thePFEnergyCalibration_->energyEm(*AddclusterRef,AddedPS1,AddedPS2,false)+addedCalibEne;  
          AddedPS2.clear(); 
          AddedPS1.clear();  
          elemsToLock.push_back(AddClusters[i]);  
        }  
      AddClusters.clear();
      float EE=thePFEnergyCalibration_->energyEm(*clusterRef,ps1Ene,ps2Ene,false)+addedCalibEne;
      PFClusters.push_back(*clusterRef);
      if(useReg_){
        float LocCorr=EvaluateLCorrMVA(clusterRef);
        EE=LocCorr*clusterRef->energy()+addedCalibEne;
      }
      else{
        float LocCorr=EvaluateLCorrMVA(clusterRef);
        MVALCorr.push_back(LocCorr*clusterRef->energy());
      }
      
      //cout<<"Original Energy "<<EE<<"Added Energy "<<addedCalibEne<<endl;
      
      photonEnergy_ +=  EE;
      RawEcalEne    +=  clusterRef->energy()+addedRawEne;
      photonX_      +=  EE * clusterRef->position().X();
      photonY_      +=  EE * clusterRef->position().Y();
      photonZ_      +=  EE * clusterRef->position().Z();                
      ps1TotEne     +=  ps1+addedps1;
      ps2TotEne     +=  ps2+addedps2;
    } // end of loop over all ECAL cluster within this SC

    
    //add elements from electron candidates
    bool goodelectron = false;
    if (matchedGsf.size()>0) {
      //printf("making electron, candsize = %i\n",int(egCandidate_.size()));
      int eleidx = matchedGsf.front();
      AddElectronElements(eleidx, elemsToLock, blockRef, associatedToGsf, associatedToBrems, associatedToEcal);
      goodelectron = AddElectronCandidate(eleidx, sc->superClusterRef(), elemsToLock, blockRef, associatedToGsf, associatedToBrems, associatedToEcal, active);
      //printf("goodelectron = %i, candsize = %i\n",int(goodelectron),int(egCandidate_.size()));
    }    
    
    if (goodelectron) continue;
    
    //printf("making photon\n");
    
    // we've looped over all ECAL clusters, ready to generate PhotonCandidate
    if( ! (photonEnergy_ > 0.) ) continue;    // This SC is not a Photon Candidate
    float sum_track_pt=0;
    //Now check if there are tracks failing isolation outside of the Jurassic isolation region  
    for(unsigned int i=0; i<IsoTracks.size(); i++)sum_track_pt=sum_track_pt+elements[IsoTracks[i]].trackRef()->pt();  
    


    math::XYZVector photonPosition(photonX_,
                                   photonY_,
                                   photonZ_);
    math::XYZVector photonPositionwrtVtx(
                                         photonX_- primaryVertex_->x(),
                                         photonY_-primaryVertex_->y(),
                                         photonZ_-primaryVertex_->z()
                                         );
    math::XYZVector photonDirection=photonPositionwrtVtx.Unit();
    
    math::XYZTLorentzVector photonMomentum(photonEnergy_* photonDirection.X(),
                                           photonEnergy_* photonDirection.Y(),
                                           photonEnergy_* photonDirection.Z(),
                                           photonEnergy_           );

//     if(sum_track_pt>(sumPtTrackIsoForPhoton_ + sumPtTrackIsoSlopeForPhoton_ * photonMomentum.pt()) && AddFromElectron_.size()==0)
//       {
//      elemsToLock.resize(0);
//      continue;
//      
//       }

        //THIS SC is not a Photon it fails track Isolation
    //if(sum_track_pt>(2+ 0.001* photonMomentum.pt()))
    //continue;//THIS SC is not a Photon it fails track Isolation

    /*
    std::cout<<" Created Photon with energy = "<<photonEnergy_<<std::endl;
    std::cout<<"                         pT = "<<photonMomentum.pt()<<std::endl;
    std::cout<<"                     RawEne = "<<RawEcalEne<<std::endl;
    std::cout<<"                          E = "<<photonMomentum.e()<<std::endl;
    std::cout<<"                        eta = "<<photonMomentum.eta()<<std::endl;
    std::cout<<"             TrackIsolation = "<< sum_track_pt <<std::endl;
    */

    reco::PFCandidate photonCand(0,photonMomentum, reco::PFCandidate::gamma);
    photonCand.setPs1Energy(ps1TotEne);
    photonCand.setPs2Energy(ps2TotEne);
    photonCand.setEcalEnergy(RawEcalEne,photonEnergy_);
    photonCand.setHcalEnergy(0.,0.);
    photonCand.set_mva_nothing_gamma(1.);  
    photonCand.setSuperClusterRef(sc->superClusterRef());
    math::XYZPoint v(primaryVertex_->x(), primaryVertex_->y(), primaryVertex_->z());
    photonCand.setVertex( v  );
    if(hasConvTrack || hasSingleleg)photonCand.setFlag( reco::PFCandidate::GAMMA_TO_GAMMACONV, true);
//     int matches=match_ind.size();
//     int count=0;
//     for ( std::vector<reco::PFCandidate>::const_iterator ec=tempElectronCandidates.begin();   ec != tempElectronCandidates.end(); ++ec ){
//       for(int i=0; i<matches; i++)
//      {
//        if(count==match_ind[i])photonCand.addDaughter(*ec);
//        count++;
//      }
//     }
    // set isvalid_ to TRUE since we've found at least one photon candidate
    isvalid_ = true;
    // push back the candidate into the collection ...
    //Add Elements from Electron
    for(std::vector<unsigned int>::const_iterator it = 
          AddFromElectron_.begin();
        it != AddFromElectron_.end(); ++it)photonCand.addElementInBlock(blockRef,*it);
    
    // ... and lock all elemts used
    for(std::vector<unsigned int>::const_iterator it = elemsToLock.begin();
        it != elemsToLock.end(); ++it)
      {
        if(active[*it])
          {
            photonCand.addElementInBlock(blockRef,*it);
            if( elements[*it].type() == reco::PFBlockElement::TRACK  )
              {
                if(elements[*it].convRef().isNonnull())
                  {
                    //make sure it is not stored already as the partner track
                    bool matched=false;
                    for(unsigned int ic = 0; ic < ConversionsRef_.size(); ic++)
                      {
                        if(ConversionsRef_[ic]==elements[*it].convRef())matched=true;
                      }
                    if(!matched)ConversionsRef_.push_back(elements[*it].convRef());
                  }
              }
          }
        active[*it] = false;    
      }
    PFPhoECorr_=0;
    // here add the extra information
    //PFCandidateEGammaExtra myExtra(sc->superClusterRef());
    PFCandidateEGammaExtra myExtra;
    //myExtra.setSuperClusterRef(sc->superClusterRef());
    myExtra.setSuperClusterBoxRef(sc->superClusterRef());
    //myExtra.setClusterEnergies(MVALCorr);
    //Store Locally Contained PF Cluster regressed energy
    for(unsigned int l=0; l<MVALCorr.size(); ++l)
      {
        //myExtra.addLCorrClusEnergy(MVALCorr[l]);
        PFPhoECorr_=PFPhoECorr_+MVALCorr[l];//total Locally corrected energy
      }
    TotPS1_=ps1TotEne;
    TotPS2_=ps2TotEne;
    //Do Global Corrections here:
    float GCorr=EvaluateGCorrMVA(photonCand, PFClusters);
    if(useReg_){
      math::XYZTLorentzVector photonCorrMomentum(GCorr*PFPhoECorr_* photonDirection.X(),
                                                 GCorr*PFPhoECorr_* photonDirection.Y(),
                                                 GCorr*PFPhoECorr_* photonDirection.Z(),
                                                 GCorr * photonEnergy_           );
      photonCand.setP4(photonCorrMomentum);
    }
    
    std::multimap<float, unsigned int>OrderedClust;
    for(unsigned int i=0; i<PFClusters.size(); ++i){  
      float et=PFClusters[i].energy()*sin(PFClusters[i].position().theta());
      OrderedClust.insert(make_pair(et, i));
    }
    std::multimap<float, unsigned int>::reverse_iterator rit;
    rit=OrderedClust.rbegin();
    unsigned int highEindex=(*rit).second;
    //store Position at ECAL Entrance as Position of Max Et PFCluster
    photonCand.setPositionAtECALEntrance(math::XYZPointF(PFClusters[highEindex].position()));
    
    //Mustache ID variables
//     Mustache Must;
//     Must.FillMustacheVar(PFClusters);
//     int excluded= Must.OutsideMust();
//     float MustacheEt=Must.MustacheEtOut();
    //myExtra.setMustache_Et(MustacheEt);
    //myExtra.setExcludedClust(excluded);
//     if(fabs(photonCand.eta()<1.4446))
//       myExtra.setMVAGlobalCorrE(GCorr * PFPhoECorr_);
//     else if(PFPhoR9_>0.94)
//       myExtra.setMVAGlobalCorrE(GCorr * PFPhoECorr_);
//     else myExtra.setMVAGlobalCorrE(GCorr * photonEnergy_);
//     float Res=EvaluateResMVA(photonCand, PFClusters);
//     myExtra.SetPFPhotonRes(Res);
    
    //    Daniele example for mvaValues
    //    do the same for single leg trackRef and convRef
    for(unsigned int ic = 0; ic < MVA_values.size(); ic++)
      {
        myExtra.addSingleLegConvMva(MVA_values[ic]);
        myExtra.addSingleLegConvTrackRef(singleLegRef[ic]);
        //cout<<"Single Leg Tracks "<<singleLegRef[ic]->pt()<<" MVA "<<MVA_values[ic]<<endl;
      }
    for(unsigned int ic = 0; ic < ConversionsRef_.size(); ic++)
      {
        myExtra.addConversionRef(ConversionsRef_[ic]);
        //cout<<"Conversion Pairs "<<ConversionsRef_[ic]->pairMomentum()<<endl;
      }
    egExtra_.push_back(myExtra);
    egCandidate_.push_back(photonCand);
    // ... and reset the vector
    elemsToLock.resize(0);
    hasConvTrack=false;
    hasSingleleg=false;
  } // end of loops over all elements in block
  
  return;
}

float PFEGammaAlgo::EvaluateResMVA(reco::PFCandidate photon, std::vector<reco::CaloCluster>PFClusters){
  float BDTG=1;
  PFPhoEta_=photon.eta();
  PFPhoPhi_=photon.phi();
  PFPhoE_=photon.energy();
  //fill Material Map:
  int ix = X0_sum->GetXaxis()->FindBin(PFPhoEta_);
  int iy = X0_sum->GetYaxis()->FindBin(PFPhoPhi_);
  x0inner_= X0_inner->GetBinContent(ix,iy);
  x0middle_=X0_middle->GetBinContent(ix,iy);
  x0outer_=X0_outer->GetBinContent(ix,iy);
  SCPhiWidth_=photon.superClusterRef()->phiWidth();
  SCEtaWidth_=photon.superClusterRef()->etaWidth();
  Mustache Must;
  std::vector<unsigned int>insideMust;
  std::vector<unsigned int>outsideMust;
  std::multimap<float, unsigned int>OrderedClust;
  Must.FillMustacheVar(PFClusters);
  MustE_=Must.MustacheE();
  LowClusE_=Must.LowestMustClust();
  PFPhoR9Corr_=E3x3_/MustE_;
  Must.MustacheClust(PFClusters,insideMust, outsideMust );
  for(unsigned int i=0; i<insideMust.size(); ++i){
    int index=insideMust[i];
    OrderedClust.insert(make_pair(PFClusters[index].energy(),index));
  }
  std::multimap<float, unsigned int>::iterator it;
  it=OrderedClust.begin();
  unsigned int lowEindex=(*it).second;
  std::multimap<float, unsigned int>::reverse_iterator rit;
  rit=OrderedClust.rbegin();
  unsigned int highEindex=(*rit).second;
  if(insideMust.size()>1){
    dEta_=fabs(PFClusters[highEindex].eta()-PFClusters[lowEindex].eta());
    dPhi_=asin(PFClusters[highEindex].phi()-PFClusters[lowEindex].phi());
  }
  else{
    dEta_=0;
    dPhi_=0;
    LowClusE_=0;
  }
  //calculate RMS for All clusters and up until the Next to Lowest inside the Mustache
  RMSAll_=ClustersPhiRMS(PFClusters, PFPhoPhi_);
  std::vector<reco::CaloCluster>PFMustClusters;
  if(insideMust.size()>2){
    for(unsigned int i=0; i<insideMust.size(); ++i){
      unsigned int index=insideMust[i];
      if(index==lowEindex)continue;
      PFMustClusters.push_back(PFClusters[index]);
    }
  }
  else{
    for(unsigned int i=0; i<insideMust.size(); ++i){
      unsigned int index=insideMust[i];
      PFMustClusters.push_back(PFClusters[index]);
    }    
  }
  RMSMust_=ClustersPhiRMS(PFMustClusters, PFPhoPhi_);
  //then use cluster Width for just one PFCluster
  RConv_=310;
  PFCandidate::ElementsInBlocks eleInBlocks = photon.elementsInBlocks();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::TRACK){
        float R=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X()+element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        if(RConv_>R)RConv_=R;
      }
      else continue;
    }
  float GC_Var[17];
  GC_Var[0]=PFPhoEta_;
  GC_Var[1]=PFPhoEt_;
  GC_Var[2]=PFPhoR9Corr_;
  GC_Var[3]=PFPhoPhi_;
  GC_Var[4]=SCEtaWidth_;
  GC_Var[5]=SCPhiWidth_;
  GC_Var[6]=x0inner_;  
  GC_Var[7]=x0middle_;
  GC_Var[8]=x0outer_;
  GC_Var[9]=RConv_;
  GC_Var[10]=LowClusE_;
  GC_Var[11]=RMSMust_;
  GC_Var[12]=RMSAll_;
  GC_Var[13]=dEta_;
  GC_Var[14]=dPhi_;
  GC_Var[15]=nVtx_;
  GC_Var[16]=MustE_;
  
  BDTG=ReaderRes_->GetResponse(GC_Var);
  //  cout<<"Res "<<BDTG<<endl;
  
  //  cout<<"BDTG Parameters X0"<<x0inner_<<", "<<x0middle_<<", "<<x0outer_<<endl;
  //  cout<<"Et, Eta, Phi "<<PFPhoEt_<<", "<<PFPhoEta_<<", "<<PFPhoPhi_<<endl;
  // cout<<"PFPhoR9 "<<PFPhoR9_<<endl;
  // cout<<"R "<<RConv_<<endl;
  
  return BDTG;
   
}

float PFEGammaAlgo::EvaluateGCorrMVA(reco::PFCandidate photon, std::vector<CaloCluster>PFClusters){
  float BDTG=1;
  PFPhoEta_=photon.eta();
  PFPhoPhi_=photon.phi();
  PFPhoE_=photon.energy();
    //fill Material Map:
  int ix = X0_sum->GetXaxis()->FindBin(PFPhoEta_);
  int iy = X0_sum->GetYaxis()->FindBin(PFPhoPhi_);
  x0inner_= X0_inner->GetBinContent(ix,iy);
  x0middle_=X0_middle->GetBinContent(ix,iy);
  x0outer_=X0_outer->GetBinContent(ix,iy);
  SCPhiWidth_=photon.superClusterRef()->phiWidth();
  SCEtaWidth_=photon.superClusterRef()->etaWidth();
  Mustache Must;
  std::vector<unsigned int>insideMust;
  std::vector<unsigned int>outsideMust;
  std::multimap<float, unsigned int>OrderedClust;
  Must.FillMustacheVar(PFClusters);
  MustE_=Must.MustacheE();
  LowClusE_=Must.LowestMustClust();
  PFPhoR9Corr_=E3x3_/MustE_;
  Must.MustacheClust(PFClusters,insideMust, outsideMust );
  for(unsigned int i=0; i<insideMust.size(); ++i){
    int index=insideMust[i];
    OrderedClust.insert(make_pair(PFClusters[index].energy(),index));
  }
  std::multimap<float, unsigned int>::iterator it;
  it=OrderedClust.begin();
  unsigned int lowEindex=(*it).second;
  std::multimap<float, unsigned int>::reverse_iterator rit;
  rit=OrderedClust.rbegin();
  unsigned int highEindex=(*rit).second;
  if(insideMust.size()>1){
    dEta_=fabs(PFClusters[highEindex].eta()-PFClusters[lowEindex].eta());
    dPhi_=asin(PFClusters[highEindex].phi()-PFClusters[lowEindex].phi());
  }
  else{
    dEta_=0;
    dPhi_=0;
    LowClusE_=0;
  }
  //calculate RMS for All clusters and up until the Next to Lowest inside the Mustache
  RMSAll_=ClustersPhiRMS(PFClusters, PFPhoPhi_);
  std::vector<reco::CaloCluster>PFMustClusters;
  if(insideMust.size()>2){
    for(unsigned int i=0; i<insideMust.size(); ++i){
      unsigned int index=insideMust[i];
      if(index==lowEindex)continue;
      PFMustClusters.push_back(PFClusters[index]);
    }
  }
  else{
    for(unsigned int i=0; i<insideMust.size(); ++i){
      unsigned int index=insideMust[i];
      PFMustClusters.push_back(PFClusters[index]);
    }    
  }
  RMSMust_=ClustersPhiRMS(PFMustClusters, PFPhoPhi_);
  //then use cluster Width for just one PFCluster
  RConv_=310;
  PFCandidate::ElementsInBlocks eleInBlocks = photon.elementsInBlocks();
  for(unsigned i=0; i<eleInBlocks.size(); i++)
    {
      PFBlockRef blockRef = eleInBlocks[i].first;
      unsigned indexInBlock = eleInBlocks[i].second;
      const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
      const reco::PFBlockElement& element = elements[indexInBlock];
      if(element.type()==reco::PFBlockElement::TRACK){
        float R=sqrt(element.trackRef()->innerPosition().X()*element.trackRef()->innerPosition().X()+element.trackRef()->innerPosition().Y()*element.trackRef()->innerPosition().Y());
        if(RConv_>R)RConv_=R;
      }
      else continue;
    }
  //cout<<"Nvtx "<<nVtx_<<endl;
  if(fabs(PFPhoEta_)<1.4446){
    float GC_Var[17];
    GC_Var[0]=PFPhoEta_;
    GC_Var[1]=PFPhoECorr_;
    GC_Var[2]=PFPhoR9Corr_;
    GC_Var[3]=SCEtaWidth_;
    GC_Var[4]=SCPhiWidth_;
    GC_Var[5]=PFPhoPhi_;
    GC_Var[6]=x0inner_;
    GC_Var[7]=x0middle_;
    GC_Var[8]=x0outer_;
    GC_Var[9]=RConv_;
    GC_Var[10]=LowClusE_;
    GC_Var[11]=RMSMust_;
    GC_Var[12]=RMSAll_;
    GC_Var[13]=dEta_;
    GC_Var[14]=dPhi_;
    GC_Var[15]=nVtx_;
    GC_Var[16]=MustE_;
    BDTG=ReaderGCEB_->GetResponse(GC_Var);
  }
  else if(PFPhoR9_>0.94){
    float GC_Var[19];
    GC_Var[0]=PFPhoEta_;
    GC_Var[1]=PFPhoECorr_;
    GC_Var[2]=PFPhoR9Corr_;
    GC_Var[3]=SCEtaWidth_;
    GC_Var[4]=SCPhiWidth_;
    GC_Var[5]=PFPhoPhi_;
    GC_Var[6]=x0inner_;
    GC_Var[7]=x0middle_;
    GC_Var[8]=x0outer_;
    GC_Var[9]=RConv_;
    GC_Var[10]=LowClusE_;
    GC_Var[11]=RMSMust_;
    GC_Var[12]=RMSAll_;
    GC_Var[13]=dEta_;
    GC_Var[14]=dPhi_;
    GC_Var[15]=nVtx_;
    GC_Var[16]=TotPS1_;
    GC_Var[17]=TotPS2_;
    GC_Var[18]=MustE_;
    BDTG=ReaderGCEEhR9_->GetResponse(GC_Var);
  }
  
  else{
    float GC_Var[19];
    GC_Var[0]=PFPhoEta_;
    GC_Var[1]=PFPhoE_;
    GC_Var[2]=PFPhoR9Corr_;
    GC_Var[3]=SCEtaWidth_;
    GC_Var[4]=SCPhiWidth_;
    GC_Var[5]=PFPhoPhi_;
    GC_Var[6]=x0inner_;
    GC_Var[7]=x0middle_;
    GC_Var[8]=x0outer_;
    GC_Var[9]=RConv_;
    GC_Var[10]=LowClusE_;
    GC_Var[11]=RMSMust_;
    GC_Var[12]=RMSAll_;
    GC_Var[13]=dEta_;
    GC_Var[14]=dPhi_;
    GC_Var[15]=nVtx_;
    GC_Var[16]=TotPS1_;
    GC_Var[17]=TotPS2_;
    GC_Var[18]=MustE_;
    BDTG=ReaderGCEElR9_->GetResponse(GC_Var);
  }
  //cout<<"GC "<<BDTG<<endl;

  return BDTG;
  
}

double PFEGammaAlgo::ClustersPhiRMS(std::vector<reco::CaloCluster>PFClusters, float PFPhoPhi){
  double PFClustPhiRMS=0;
  double delPhi2=0;
  double delPhiSum=0;
  double ClusSum=0;
  for(unsigned int c=0; c<PFClusters.size(); ++c){
    delPhi2=(acos(cos(PFPhoPhi-PFClusters[c].phi()))* acos(cos(PFPhoPhi-PFClusters[c].phi())) )+delPhi2;
    delPhiSum=delPhiSum+ acos(cos(PFPhoPhi-PFClusters[c].phi()))*PFClusters[c].energy();
    ClusSum=ClusSum+PFClusters[c].energy();
  }
  double meandPhi=delPhiSum/ClusSum;
  PFClustPhiRMS=sqrt(fabs(delPhi2/ClusSum - (meandPhi*meandPhi)));
  
  return PFClustPhiRMS;
}

float PFEGammaAlgo::EvaluateLCorrMVA(reco::PFClusterRef clusterRef ){
  float BDTG=1;
  PFPhotonClusters ClusterVar(clusterRef);
  std::pair<double, double>ClusCoor=ClusterVar.GetCrysCoor();
  std::pair<int, int>ClusIndex=ClusterVar.GetCrysIndex();
  //Local Coordinates:
  if(clusterRef->layer()==PFLayer:: ECAL_BARREL ){//is Barrel
    PFCrysEtaCrack_=ClusterVar.EtaCrack();
    CrysEta_=ClusCoor.first;
    CrysPhi_=ClusCoor.second;
    CrysIEta_=ClusIndex.first;
    CrysIPhi_=ClusIndex.second;
  }
  else{
    CrysX_=ClusCoor.first;
    CrysY_=ClusCoor.second;
  }
  //Shower Shape Variables:
  eSeed_= ClusterVar.E5x5Element(0, 0)/clusterRef->energy();
  etop_=ClusterVar.E5x5Element(0,1)/clusterRef->energy();
  ebottom_=ClusterVar.E5x5Element(0,-1)/clusterRef->energy();
  eleft_=ClusterVar.E5x5Element(-1,0)/clusterRef->energy();
  eright_=ClusterVar.E5x5Element(1,0)/clusterRef->energy();
  e1x3_=(ClusterVar.E5x5Element(0,0)+ClusterVar.E5x5Element(0,1)+ClusterVar.E5x5Element(0,-1))/clusterRef->energy();
  e3x1_=(ClusterVar.E5x5Element(0,0)+ClusterVar.E5x5Element(-1,0)+ClusterVar.E5x5Element(1,0))/clusterRef->energy();
  e1x5_=ClusterVar.E5x5Element(0,0)+ClusterVar.E5x5Element(0,-2)+ClusterVar.E5x5Element(0,-1)+ClusterVar.E5x5Element(0,1)+ClusterVar.E5x5Element(0,2);
  
  e2x5Top_=(ClusterVar.E5x5Element(-2,2)+ClusterVar.E5x5Element(-1, 2)+ClusterVar.E5x5Element(0, 2)
            +ClusterVar.E5x5Element(1, 2)+ClusterVar.E5x5Element(2, 2)
            +ClusterVar.E5x5Element(-2,1)+ClusterVar.E5x5Element(-1,1)+ClusterVar.E5x5Element(0,1)
            +ClusterVar.E5x5Element(1,1)+ClusterVar.E5x5Element(2,1))/clusterRef->energy();
  e2x5Bottom_=(ClusterVar.E5x5Element(-2,-2)+ClusterVar.E5x5Element(-1,-2)+ClusterVar.E5x5Element(0,-2)
               +ClusterVar.E5x5Element(1,-2)+ClusterVar.E5x5Element(2,-2)
               +ClusterVar.E5x5Element(-2,1)+ClusterVar.E5x5Element(-1,1)
               +ClusterVar.E5x5Element(0,1)+ClusterVar.E5x5Element(1,1)+ClusterVar.E5x5Element(2,1))/clusterRef->energy();
  e2x5Left_= (ClusterVar.E5x5Element(-2,-2)+ClusterVar.E5x5Element(-2,-1)
              +ClusterVar.E5x5Element(-2,0)
               +ClusterVar.E5x5Element(-2,1)+ClusterVar.E5x5Element(-2,2)
              +ClusterVar.E5x5Element(-1,-2)+ClusterVar.E5x5Element(-1,-1)+ClusterVar.E5x5Element(-1,0)
              +ClusterVar.E5x5Element(-1,1)+ClusterVar.E5x5Element(-1,2))/clusterRef->energy();
  
  e2x5Right_ =(ClusterVar.E5x5Element(2,-2)+ClusterVar.E5x5Element(2,-1)
               +ClusterVar.E5x5Element(2,0)+ClusterVar.E5x5Element(2,1)+ClusterVar.E5x5Element(2,2)
               +ClusterVar.E5x5Element(1,-2)+ClusterVar.E5x5Element(1,-1)+ClusterVar.E5x5Element(1,0)
               +ClusterVar.E5x5Element(1,1)+ClusterVar.E5x5Element(1,2))/clusterRef->energy();
  float centerstrip=ClusterVar.E5x5Element(0,0)+ClusterVar.E5x5Element(0, -2)
    +ClusterVar.E5x5Element(0,-1)+ClusterVar.E5x5Element(0,1)+ClusterVar.E5x5Element(0,2);
  float rightstrip=ClusterVar.E5x5Element(1, 0)+ClusterVar.E5x5Element(1,1)
    +ClusterVar.E5x5Element(1,2)+ClusterVar.E5x5Element(1,-1)+ClusterVar.E5x5Element(1,-2);
  float leftstrip=ClusterVar.E5x5Element(-1,0)+ClusterVar.E5x5Element(-1,-1)+ClusterVar.E5x5Element(-1,2)
    +ClusterVar.E5x5Element(-1,1)+ClusterVar.E5x5Element(-1,2);
  
  if(rightstrip>leftstrip)e2x5Max_=rightstrip+centerstrip;
  else e2x5Max_=leftstrip+centerstrip;
  e2x5Max_=e2x5Max_/clusterRef->energy();
  //GetCrysCoordinates(clusterRef);
  //fill5x5Map(clusterRef);
  VtxZ_=primaryVertex_->z();
  ClusPhi_=clusterRef->position().phi(); 
  ClusEta_=fabs(clusterRef->position().eta());
  EB=fabs(clusterRef->position().eta())/clusterRef->position().eta();
  logPFClusE_=log(clusterRef->energy());
  if(ClusEta_<1.4446){
    float LC_Var[26];
    LC_Var[0]=VtxZ_;
    LC_Var[1]=EB;
    LC_Var[2]=ClusEta_;
    LC_Var[3]=ClusPhi_;
    LC_Var[4]=logPFClusE_;
    LC_Var[5]=eSeed_;
    //top bottom left right
    LC_Var[6]=etop_;
    LC_Var[7]=ebottom_;
    LC_Var[8]=eleft_;
    LC_Var[9]=eright_;
    LC_Var[10]=ClusR9_;
    LC_Var[11]=e1x3_;
    LC_Var[12]=e3x1_;
    LC_Var[13]=Clus5x5ratio_;
    LC_Var[14]=e1x5_;
    LC_Var[15]=e2x5Max_;
    LC_Var[16]=e2x5Top_;
    LC_Var[17]=e2x5Bottom_;
    LC_Var[18]=e2x5Left_;
    LC_Var[19]=e2x5Right_;
    LC_Var[20]=CrysEta_;
    LC_Var[21]=CrysPhi_;
    float CrysIphiMod2=CrysIPhi_%2;
    float CrysIetaMod5=CrysIEta_%5;
    float CrysIphiMod20=CrysIPhi_%20;
    LC_Var[22]=CrysIphiMod2;
    LC_Var[23]=CrysIetaMod5;
    LC_Var[24]=CrysIphiMod20;   
    LC_Var[25]=PFCrysEtaCrack_;
    BDTG=ReaderLCEB_->GetResponse(LC_Var);   
    //cout<<"LC "<<BDTG<<endl;  
  }
  else{
    float LC_Var[22];
    LC_Var[0]=VtxZ_;
    LC_Var[1]=EB;
    LC_Var[2]=ClusEta_;
    LC_Var[3]=ClusPhi_;
    LC_Var[4]=logPFClusE_;
    LC_Var[5]=eSeed_;
    //top bottom left right
    LC_Var[6]=etop_;
    LC_Var[7]=ebottom_;
    LC_Var[8]=eleft_;
    LC_Var[9]=eright_;
    LC_Var[10]=ClusR9_;
    LC_Var[11]=e1x3_;
    LC_Var[12]=e3x1_;
    LC_Var[13]=Clus5x5ratio_;
    LC_Var[14]=e1x5_;
    LC_Var[15]=e2x5Max_;
    LC_Var[16]=e2x5Top_;
    LC_Var[17]=e2x5Bottom_;
    LC_Var[18]=e2x5Left_;
    LC_Var[19]=e2x5Right_;
    LC_Var[20]=CrysX_;
    LC_Var[21]=CrysY_;
    BDTG=ReaderLCEE_->GetResponse(LC_Var);   
    //cout<<"LC "<<BDTG<<endl;  
  }
   return BDTG;
  
}

bool PFEGammaAlgo::EvaluateSingleLegMVA(const reco::PFBlockRef& blockref, const reco::Vertex& primaryvtx, unsigned int track_index)  
{  
  bool convtkfound=false;  
  const reco::PFBlock& block = *blockref;  
  const edm::OwnVector< reco::PFBlockElement >& elements = block.elements();  
  //use this to store linkdata in the associatedElements function below  
  PFBlock::LinkData linkData =  block.linkData();  
  //calculate MVA Variables  
  chi2=elements[track_index].trackRef()->chi2()/elements[track_index].trackRef()->ndof();  
  nlost=elements[track_index].trackRef()->trackerExpectedHitsInner().numberOfLostHits();  
  nlayers=elements[track_index].trackRef()->hitPattern().trackerLayersWithMeasurement();  
  track_pt=elements[track_index].trackRef()->pt();  
  STIP=elements[track_index].trackRefPF()->STIP();  
   
  float linked_e=0;  
  float linked_h=0;  
  std::multimap<double, unsigned int> ecalAssoTrack;  
  block.associatedElements( track_index,linkData,  
                            ecalAssoTrack,  
                            reco::PFBlockElement::ECAL,  
                            reco::PFBlock::LINKTEST_ALL );  
  std::multimap<double, unsigned int> hcalAssoTrack;  
  block.associatedElements( track_index,linkData,  
                            hcalAssoTrack,  
                            reco::PFBlockElement::HCAL,  
                            reco::PFBlock::LINKTEST_ALL );  
  if(ecalAssoTrack.size() > 0) {  
    for(std::multimap<double, unsigned int>::iterator itecal = ecalAssoTrack.begin();  
        itecal != ecalAssoTrack.end(); ++itecal) {  
      linked_e=linked_e+elements[itecal->second].clusterRef()->energy();  
    }  
  }  
  if(hcalAssoTrack.size() > 0) {  
    for(std::multimap<double, unsigned int>::iterator ithcal = hcalAssoTrack.begin();  
        ithcal != hcalAssoTrack.end(); ++ithcal) {  
      linked_h=linked_h+elements[ithcal->second].clusterRef()->energy();  
    }  
  }  
  EoverPt=linked_e/elements[track_index].trackRef()->pt();  
  HoverPt=linked_h/elements[track_index].trackRef()->pt();  
  GlobalVector rvtx(elements[track_index].trackRef()->innerPosition().X()-primaryvtx.x(),  
                    elements[track_index].trackRef()->innerPosition().Y()-primaryvtx.y(),  
                    elements[track_index].trackRef()->innerPosition().Z()-primaryvtx.z());  
  double vtx_phi=rvtx.phi();  
  //delta Phi between conversion vertex and track  
  del_phi=fabs(deltaPhi(vtx_phi, elements[track_index].trackRef()->innerMomentum().Phi()));  
  mvaValue = tmvaReader_->EvaluateMVA("BDT");  
  if(mvaValue > MVACUT)convtkfound=true;  
  return convtkfound;  
}

//Recover Early Conversions reconstructed as PFelectrons
void PFEGammaAlgo::EarlyConversion(    
                                   //std::auto_ptr< reco::PFCandidateCollection > 
                                   //&pfElectronCandidates_,
                                   std::vector<reco::PFCandidate>& 
                                   tempElectronCandidates,
                                   const reco::PFBlockElementSuperCluster* sc
                                   ){
  //step 1 check temp electrons for clusters that match Photon Supercluster:
  // permElectronCandidates->clear();
  int count=0;
  for ( std::vector<reco::PFCandidate>::const_iterator ec=tempElectronCandidates.begin();   ec != tempElectronCandidates.end(); ++ec ) 
    {
      //      bool matched=false;
      int mh=ec->gsfTrackRef()->trackerExpectedHitsInner().numberOfLostHits();
      //if(mh==0)continue;//Case where missing hits greater than zero
      
      reco::GsfTrackRef gsf=ec->gsfTrackRef();
      //some hoopla to get Electron SC ref
      
      if(gsf->extra().isAvailable() && gsf->extra()->seedRef().isAvailable() && mh>0) 
        {
          reco::ElectronSeedRef seedRef=  gsf->extra()->seedRef().castTo<reco::ElectronSeedRef>();
          if(seedRef.isAvailable() && seedRef->isEcalDriven()) 
            {
              reco::SuperClusterRef ElecscRef = seedRef->caloCluster().castTo<reco::SuperClusterRef>();
              
              if(ElecscRef.isNonnull()){
                //finally see if it matches:
                reco::SuperClusterRef PhotscRef=sc->superClusterRef();
                if(PhotscRef==ElecscRef)
                  {
                    match_ind.push_back(count);
                    //  matched=true; 
                    //cout<<"Matched Electron with Index "<<count<<" This is the electron "<<*ec<<endl;
                    //find that they have the same SC footprint start to collect Clusters and tracks and these will be passed to PFPhoton
                    reco::PFCandidate::ElementsInBlocks eleInBlocks = ec->elementsInBlocks();
                    for(unsigned i=0; i<eleInBlocks.size(); i++) 
                      {
                        reco::PFBlockRef blockRef = eleInBlocks[i].first;
                        unsigned indexInBlock = eleInBlocks[i].second;   
                        //const edm::OwnVector< reco::PFBlockElement >&  elements=eleInBlocks[i].first->elements();
                        //const reco::PFBlockElement& element = elements[indexInBlock];                 
                        
                        AddFromElectron_.push_back(indexInBlock);               
                      }             
                  }             
              }
            }     
        }           
      count++;
    }
}

bool PFEGammaAlgo::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->trackerExpectedHitsInner().numberOfLostHits();  
              
              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);
              
              reco::HitPattern kfHitPattern = trkref->hitPattern();
              int NValPixelHit = kfHitPattern.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;
}

unsigned int PFEGammaAlgo::whichTrackAlgo(const reco::TrackRef& trackRef) {
  unsigned int Algo = 0; 
  switch (trackRef->algo()) {
  case TrackBase::ctf:
  case TrackBase::iter0:
  case TrackBase::iter1:
  case TrackBase::iter2:
    Algo = 0;
    break;
  case TrackBase::iter3:
    Algo = 1;
    break;
  case TrackBase::iter4:
    Algo = 2;
    break;
  case TrackBase::iter5:
    Algo = 3;
    break;
  case TrackBase::iter6:
    Algo = 4;
    break;
  default:
    Algo = 5;
    break;
  }
  return Algo;
}
bool PFEGammaAlgo::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;
}

void PFEGammaAlgo::AddElectronElements(unsigned int gsf_index,
                                     std::vector<unsigned int> &elemsToLock,
                                     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();
  
  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;

  
  elemsToLock.push_back(gsf_index);
  vector<unsigned int> &assogsf_index = associatedToGsf_[gsf_index];
  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
    elemsToLock.push_back((assogsf_index[ielegsf]));
    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) {
            elemsToLock.push_back((fifthStepKfTrack_[itr].second));
          }
        }
      }

      // 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
            elemsToLock.push_back(convGsfTrack_[iconv].second);
            // 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) {
              elemsToLock.push_back(convKf.begin()->second);
            }
          }
        }
      }


      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) 
          elemsToLock.push_back((assoecalgsf_index[ips]));
        if  (elements[(assoecalgsf_index[ips])].type() == reco::PFBlockElement::PS2) 
          elemsToLock.push_back(assoecalgsf_index[ips]);
        if  (elements[(assoecalgsf_index[ips])].type() == reco::PFBlockElement::TRACK) {
          //FIXME: some extra input needed here which is not available yet
//        if(lockExtraKf_[cgsf] == true) {            
//          elemsToLock.push_back(assoecalgsf_index[ips])
//        }
        }
      }
    } // 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
          elemsToLock.push_back(assobrem_index[ibrem]);

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

          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) 
              elemsToLock.push_back(assoelebrem_index[ielebrem]);
            if (elements[(assoelebrem_index[ielebrem])].type() == reco::PFBlockElement::PS2) 
              elemsToLock.push_back(assoelebrem_index[ielebrem]);
          }
        }
      }
    } // End if BREM      
  } // End loop on elements from gsf track
  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_
bool PFEGammaAlgo::AddElectronCandidate(unsigned int gsf_index,
                                        reco::SuperClusterRef scref,
                                         std::vector<unsigned int> &elemsToLock,
                                         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();
  PFEnergyResolution pfresol_;
  //PFEnergyCalibration pfcalib_;

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

          
  // 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 = associatedToGsf_[gsf_index];
  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
            //FIXME: constituents needed?
//          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);
      PFCandidateEGammaExtra myExtraEqual(RefGSF);
      //myExtraEqual.setSuperClusterRef(scref);
      myExtraEqual.setSuperClusterBoxRef(scref);
      myExtraEqual.setClusterEnergies(clusterEnergyVec);
      //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;
      reco::PFCandidate temp_Candidate(charge,newmomentum,particleType);
      //FIXME: need bdt output
      //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);
      
      //supercluster ref is always available now and points to ecal-drive box/mustache supercluster
      temp_Candidate.setSuperClusterRef(scref);
      
      // save the superclusterRef when available
      //FIXME: Point back to ecal-driven supercluster ref, which is now always 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
//        }
//      }
//       }
      
      myExtraEqual.setStatus(PFCandidateEGammaExtra::Selected,true);
      
      // ... and lock all elemts used
      for(std::vector<unsigned int>::const_iterator it = elemsToLock.begin();
          it != elemsToLock.end(); ++it)
        {
          if(active[*it])
            {
              temp_Candidate.addElementInBlock(blockRef,*it);
            }
          active[*it] = false;  
        }      
      
      egCandidate_.push_back(temp_Candidate);
      egExtra_.push_back(myExtraEqual);
      
      return true;
      
//       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;
      return false;
    }
  } 
  else {
    //BDToutput_[cgsf] = -1.;  // if gsf ref does not exist
    if( DebugIDCandidates ) 
      cout << "SetCandidates:: No Candidate Produced because of No GSF Track Ref " <<endl;
    return false;
  }
  return false;
}