/data/refman/pasoursint/CMSSW_4_1_8_patch13/src/RecoEgamma/EgammaIsolationAlgos/plugins/EgammaTowerIsolationProducer.cc

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//*****************************************************************************
// File:      EgammaTowerIsolationProducer.cc
// ----------------------------------------------------------------------------
// OrigAuth:  Matthias Mozer
// Institute: IIHE-VUB
//=============================================================================
//*****************************************************************************


#include "RecoEgamma/EgammaIsolationAlgos/plugins/EgammaTowerIsolationProducer.h"

// Framework
#include "DataFormats/Common/interface/Handle.h"

#include "DataFormats/Candidate/interface/Candidate.h"
#include "DataFormats/Candidate/interface/CandAssociation.h"
#include "DataFormats/RecoCandidate/interface/RecoCandidate.h"
#include "DataFormats/EgammaReco/interface/SuperCluster.h"
#include "DataFormats/EgammaReco/interface/SuperClusterFwd.h"

#include "DataFormats/CaloTowers/interface/CaloTowerCollection.h"


EgammaTowerIsolationProducer::EgammaTowerIsolationProducer(const edm::ParameterSet& config) : conf_(config)
{
 // use configuration file to setup input/output collection names
  emObjectProducer_               = conf_.getParameter<edm::InputTag>("emObjectProducer");

  towerProducer_           = conf_.getParameter<edm::InputTag>("towerProducer");

  egHcalIsoPtMin_               = conf_.getParameter<double>("etMin");
  egHcalIsoConeSizeIn_          = conf_.getParameter<double>("intRadius");
  egHcalIsoConeSizeOut_         = conf_.getParameter<double>("extRadius");
  egHcalDepth_                  = conf_.getParameter<int>("Depth");


  //register your products
  produces < edm::ValueMap<double> >();
}


EgammaTowerIsolationProducer::~EgammaTowerIsolationProducer(){}


//
// member functions
//

// ------------ method called to produce the data  ------------
void
EgammaTowerIsolationProducer::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  
  // Get the  filtered objects
  edm::Handle< edm::View<reco::Candidate> > emObjectHandle;
  iEvent.getByLabel(emObjectProducer_,emObjectHandle);
  
  // Get the barrel hcal hits
  edm::Handle<CaloTowerCollection> towerHandle;
  iEvent.getByLabel(towerProducer_, towerHandle);
  const CaloTowerCollection* towers = towerHandle.product();

  std::auto_ptr<edm::ValueMap<double> > isoMap(new edm::ValueMap<double>());
  edm::ValueMap<double>::Filler filler(*isoMap);
  std::vector<double> retV(emObjectHandle->size(),0);

  EgammaTowerIsolation myHadIsolation(egHcalIsoConeSizeOut_,
                              egHcalIsoConeSizeIn_,
                              egHcalIsoPtMin_,
                              egHcalDepth_,           
                              towers) ;

  
  for( size_t i = 0 ; i < emObjectHandle->size(); ++i) {
    double isoValue = myHadIsolation.getTowerEtSum(&(emObjectHandle->at(i)));
    retV[i]=isoValue;
  }

  filler.insert(emObjectHandle,retV.begin(),retV.end());
  filler.fill();
  iEvent.put(isoMap);

}

//define this as a plug-in
//DEFINE_FWK_MODULE(EgammaTowerIsolationProducer);