/data/refman/pasoursint/CMSSW_5_2_9/src/RecoBTag/SoftLepton/plugins/SoftElectronCandProducer.cc

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#include "RecoBTag/SoftLepton/plugins/SoftElectronCandProducer.h"
#include "DataFormats/EgammaCandidates/interface/GsfElectronFwd.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrackFwd.h"
#include "DataFormats/Math/interface/deltaR.h"
#include "DataFormats/Math/interface/Vector3D.h"
#include "DataFormats/Math/interface/Point3D.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "DataFormats/Common/interface/ValueMap.h"

#include <cmath>

SoftElectronCandProducer::SoftElectronCandProducer (const edm::ParameterSet& conf) :
    gsfElectronTag_                  (conf.getParameter<edm::InputTag>("electrons")),

    barrelPtCuts_                    (conf.getParameter<std::vector<double> >("BarrelPtCuts")),
    barreldRGsfTrackElectronCuts_    (conf.getParameter<std::vector<double> >("BarreldRGsfTrackElectronCuts")),
    barrelEemPinRatioCuts_           (conf.getParameter<std::vector<double> >("BarrelEemPinRatioCuts")),
    barrelMVACuts_                   (conf.getParameter<std::vector<double> >("BarrelMVACuts")),

    forwardPtCuts_                   (conf.getParameter<std::vector<double> >("ForwardPtCuts")),
    forwardInverseFBremCuts_         (conf.getParameter<std::vector<double> >("ForwardInverseFBremCuts")),
    forwarddRGsfTrackElectronCuts_   (conf.getParameter<std::vector<double> >("ForwarddRGsfTrackElectronCuts")),
    forwardMVACuts_                  (conf.getParameter<std::vector<double> >("ForwardMVACuts"))
{
    produces< edm::ValueMap<float> >();
}

SoftElectronCandProducer::~SoftElectronCandProducer()
{

}

void SoftElectronCandProducer::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  edm::Handle<reco::GsfElectronCollection> gsfCandidates;
  iEvent.getByLabel(gsfElectronTag_, gsfCandidates);

  std::vector<float> values;
  values.reserve(gsfCandidates->size());

  for(reco::GsfElectronCollection::const_iterator iter = gsfCandidates->begin();
      iter != gsfCandidates->end(); ++iter)
    values.push_back(isClean(*iter) ? 1.0 : 0.0);

  std::auto_ptr< edm::ValueMap<float> > output(new edm::ValueMap<float>);
  edm::ValueMap<float>::Filler filler(*output);
  filler.insert(gsfCandidates, values.begin(), values.end());
  filler.fill();
  iEvent.put(output);
}

bool SoftElectronCandProducer::isClean(const reco::GsfElectron& gsfcandidate)
{
  const reco::HitPattern& hitPattern = gsfcandidate.gsfTrack()->hitPattern();
  //check that the first hit is a pixel hit
  uint32_t hit = hitPattern.getHitPattern(0);
  if( !(hitPattern.validHitFilter(hit) && ( (hitPattern.pixelBarrelHitFilter(hit) && hitPattern.getLayer(hit) < 3) || hitPattern.pixelEndcapHitFilter(hit))) )
    return false;

  const double EemPinRatio           = (gsfcandidate.eSuperClusterOverP() - 1.0)/(gsfcandidate.eSuperClusterOverP() + 1.0);
  const double pt                    = gsfcandidate.pt();
  const double fbrem                 = gsfcandidate.fbrem();
  const double dRGsfTrackElectron    = deltaR(gsfcandidate.gsfTrack()->eta(), gsfcandidate.gsfTrack()->phi(), gsfcandidate.eta(), gsfcandidate.phi());
  const double mva                   = gsfcandidate.mva();

  if(fabs(gsfcandidate.eta()) < 1.5)
  {
    // use barrel cuts
    if( barrelPtCuts_.front()                    > pt                    || barrelPtCuts_.back()                    < pt)                    return false;
    if( barreldRGsfTrackElectronCuts_.front()    > dRGsfTrackElectron    || barreldRGsfTrackElectronCuts_.back()    < dRGsfTrackElectron)    return false;
    if( barrelEemPinRatioCuts_.front()           > EemPinRatio           || barrelEemPinRatioCuts_.back()           < EemPinRatio)           return false;
    if( barrelMVACuts_.front()                   > mva                   || barrelMVACuts_.back()                   < mva)                   return false;
  }
  else
  {
    // use endcap cuts
    if( forwardPtCuts_.front()                 > pt                 || forwardPtCuts_.back()                 < pt)                 return false;
    if( forwardInverseFBremCuts_.front()       > 1.0/fbrem          || forwardInverseFBremCuts_.back()       < 1.0/fbrem)          return false;
    if( forwarddRGsfTrackElectronCuts_.front() > dRGsfTrackElectron || forwarddRGsfTrackElectronCuts_.back() < dRGsfTrackElectron) return false;
    if( forwardMVACuts_.front()                > mva                || forwardMVACuts_.back()                < mva)                return false;
  }

  return true;
}