/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/EgammaAnalysis/CSA07Skims/src/EgammaProbeSelector.cc

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#include "EgammaAnalysis/CSA07Skims/interface/EgammaProbeSelector.h"
#include "DataFormats/JetReco/interface/Jet.h"
#include "DataFormats/JetReco/interface/CaloJetCollection.h"
#include "DataFormats/EgammaReco/interface/SuperCluster.h"
#include "DataFormats/EgammaReco/interface/SuperClusterFwd.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <iostream> 
#include <TMath.h>

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


EgammaProbeSelector::EgammaProbeSelector(const edm::ParameterSet& iConfig) {
  
  jetLabel        = iConfig.getParameter<InputTag>("JetCollection");
  minNumberOfjets = iConfig.getParameter<int>("MinNumberOfJets");
  jetEtMin        = iConfig.getParameter<double>("JetEtMin");
  jetEtaMin       = iConfig.getParameter<double>("JetEtaMin");
  jetEtaMax       = iConfig.getParameter<double>("JetEtaMax");
  
  nEvents         = 0;
  nSelectedEvents = 0;
  
  scLabel          = iConfig.getParameter<InputTag>("SuperClusterBarrelCollection");
  scEELabel        = iConfig.getParameter<InputTag>("SuperClusterEndCapCollection");
  minNumberOfSuperClusters = iConfig.getParameter<int>("MinNumberOfSuperClusters");
  scEtMin          = iConfig.getParameter<double>("ScEtMin");
  scEtaMin         = iConfig.getParameter<double>("ScEtaMin");
  scEtaMax         = iConfig.getParameter<double>("ScEtaMax");
}


EgammaProbeSelector::~EgammaProbeSelector(){
  edm::LogVerbatim("EgammaProbeSelector") 
    << " Number_events_read " << nEvents
    << " Number_events_kept " << nSelectedEvents
    << " Efficiency         " << ((double)nSelectedEvents)/((double) nEvents + 0.01) << std::endl;
  
}


bool EgammaProbeSelector::filter(edm::Event& iEvent, const edm::EventSetup& iSetup ){
  int nSC   = 0;
  int nJets = 0;  
  nEvents++;
  
  // Get reconstructed Jets, check their Et and eta, and count their number
  Handle<CaloJetCollection> jetHandle;
  iEvent.getByLabel(jetLabel,jetHandle);
  
  if(jetHandle.isValid()){
    const reco::CaloJetCollection & jets = *(jetHandle.product());
    CaloJetCollection::const_iterator ijet;
    for(ijet = jets.begin(); ijet!= jets.end(); ijet++){
      if(ijet->pt()  > jetEtMin  && 
         ijet->eta() > jetEtaMin &&
         ijet->eta() < jetEtaMax ) 
        nJets++;                
    }
  }
  
  // Get Super Clusters, check their Et and eta, and count their number
  // EB
  Handle<reco::SuperClusterCollection> scHandle;
  iEvent.getByLabel(scLabel,scHandle);
  
  if(scHandle.isValid()){
    const reco::SuperClusterCollection & SCs = *(scHandle.product());
    
    for(reco::SuperClusterCollection::const_iterator scIt = SCs.begin(); 
        scIt!= SCs.end(); scIt++){

      double scEt   = scIt->energy() * TMath::Sin(scIt->position().theta());
      double _eta = scIt->position().eta();
      if(scEt  > scEtMin && _eta > scEtaMin && _eta < scEtaMax) nSC++;          
    }
  }

  // EE
  Handle<reco::SuperClusterCollection> scEEHandle;
  iEvent.getByLabel(scEELabel,scEEHandle);
  
  if(scEEHandle.isValid()){
    const reco::SuperClusterCollection & SCs = *(scEEHandle.product());
    for(reco::SuperClusterCollection::const_iterator scIt = SCs.begin(); 
        scIt!= SCs.end(); scIt++){
      
      double scEt   = scIt->energy() * TMath::Sin(scIt->position().theta()); 
      double _eta = scIt->position().eta();
      if(scEt  > scEtMin && _eta > scEtaMin && _eta < scEtaMax) nSC++; 
    }
  } 
  
  // Make final desicion on passed events
  bool accepted = false;
  if(nJets >= minNumberOfjets || nSC >=minNumberOfSuperClusters) {
    accepted = true;
    nSelectedEvents++;
  }
  
  return accepted;
}