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PFJet.cc

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// PFJet.cc
// Fedor Ratnikov UMd
// $Id: PFJet.cc,v 1.14 2008/07/27 16:22:21 cbern Exp $
#include <sstream>
#include <typeinfo>

#include "FWCore/Utilities/interface/Exception.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlock.h"

//Own header file
#include "DataFormats/JetReco/interface/PFJet.h"

using namespace reco;

PFJet::PFJet (const LorentzVector& fP4, const Point& fVertex, 
                  const Specific& fSpecific, 
                  const Jet::Constituents& fConstituents)
  : Jet (fP4, fVertex, fConstituents),
    m_specific (fSpecific)
{}

PFJet::PFJet (const LorentzVector& fP4, const Point& fVertex, 
              const Specific& fSpecific)
  : Jet (fP4, fVertex),
    m_specific (fSpecific)
{}

PFJet::PFJet (const LorentzVector& fP4, 
                  const Specific& fSpecific, 
                  const Jet::Constituents& fConstituents)
  : Jet (fP4, Point(0,0,0), fConstituents),
    m_specific (fSpecific)
{}

const reco::PFCandidate* PFJet::getPFCandidate (const reco::Candidate* fConstituent) {
  if (!fConstituent) return 0;
  const reco::Candidate* base = fConstituent;
  if (fConstituent->hasMasterClone ()) base = fConstituent->masterClone().get();
  if (!base) return 0; // not in the event
  const PFCandidate* candidate = dynamic_cast <const PFCandidate*> (base);
  if (!candidate) {
    throw cms::Exception("Invalid Constituent") << "PFJet constituent is not of PFCandidate type."
                                                << "Actual type is " << typeid (*base).name();
  }
  return candidate;
}

const reco::PFCandidate* PFJet::getPFConstituent (unsigned fIndex) const {
  return getPFCandidate (daughter (fIndex));
}

std::vector <const reco::PFCandidate*> PFJet::getPFConstituents () const {
  std::vector <const reco::PFCandidate*> result;
  for (unsigned i = 0;  i <  numberOfDaughters (); i++) result.push_back (getPFConstituent (i));
  return result;
}


reco::TrackRefVector PFJet::getTrackRefs() const {
  // result will contain chargedMultiplicity() elements
  reco::TrackRefVector result;
  result.reserve( chargedMultiplicity() );
  for (unsigned i = 0;  i <  numberOfDaughters (); i++) {
    const reco::PFCandidate* pfcand = getPFConstituent (i);
    reco::TrackRef trackref = pfcand->trackRef();
    if( trackref.isNonnull() ) {
      result.push_back( trackref );
    }
  }

  return result;
}


PFJet* PFJet::clone () const {
  return new PFJet (*this);
}

bool PFJet::overlap( const Candidate & ) const {
  return false;
}

std::string PFJet::print () const {
  std::ostringstream out;
  out << Jet::print () // generic jet info
      << "    PFJet specific:" << std::endl
      << "      charged/neutral hadrons energy: " << chargedHadronEnergy () << '/' << neutralHadronEnergy () << std::endl
      << "      charged/neutral em energy: " << chargedEmEnergy () << '/' << neutralEmEnergy () << std::endl
      << "      charged muon energy: " << chargedMuEnergy () << '/' << std::endl
      << "      charged/neutral multiplicity: " << chargedMultiplicity () << '/' << neutralMultiplicity () << std::endl;
  out << "      PFCandidate constituents:" << std::endl;
  std::vector <const PFCandidate*> constituents = getPFConstituents ();
  for (unsigned i = 0; i < constituents.size (); ++i) {
    if (constituents[i]) {
      out << "      #" << i << " " << *(constituents[i]) << std::endl;
    }
    else {
      out << "      #" << i << " PFCandidate is not available in the event"  << std::endl;
    }
  }
  return out.str ();
}

std::ostream& reco::operator<<(std::ostream& out, const reco::PFJet& jet) {

  if(!out ) return out;
  out<<"PFJet "
     <<"(pt, eta, phi) = "<<jet.pt()<<","<<jet.eta()<<","<<jet.phi()
     <<"  (CHEF,NHEF,GEF) = "
     <<jet.chargedHadronEnergyFraction()<<","
     <<jet.neutralHadronEnergyFraction()<<","
     <<jet.neutralEmEnergyFraction();
  return out;
}

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