HiEgammaSCCorrectionMaker.cc

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#include "RecoHI/HiEgammaAlgos/plugins/HiEgammaSCCorrectionMaker.h"
#include "DataFormats/EgammaReco/interface/SuperCluster.h"
#include "DataFormats/EcalRecHit/interface/EcalRecHit.h"

#include "FWCore/PluginManager/interface/ModuleDef.h"
#include "FWCore/Framework/interface/MakerMacros.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "DataFormats/Common/interface/Handle.h"

#include "Geometry/Records/interface/CaloGeometryRecord.h"
#include "Geometry/CaloGeometry/interface/CaloSubdetectorGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloCellGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/CaloTopology/interface/EcalBarrelTopology.h"
#include "Geometry/CaloTopology/interface/EcalEndcapTopology.h"
#include "Geometry/CaloTopology/interface/EcalPreshowerTopology.h"
#include "Geometry/CaloTopology/interface/CaloTopology.h"
#include "Geometry/CaloEventSetup/interface/CaloTopologyRecord.h"

#include "RecoEcal/EgammaCoreTools/interface/EcalClusterFunctionBaseClass.h" 
#include "RecoEcal/EgammaCoreTools/interface/EcalClusterFunctionFactory.h" 


#include <string>

HiEgammaSCCorrectionMaker::HiEgammaSCCorrectionMaker(const edm::ParameterSet& ps)
{
 
  // The verbosity level
  std::string debugString = ps.getParameter<std::string>("VerbosityLevel");
  if      (debugString == "DEBUG")   verbosity_ = HiEgammaSCEnergyCorrectionAlgo::pDEBUG;
  else if (debugString == "INFO")    verbosity_ = HiEgammaSCEnergyCorrectionAlgo::pINFO;
  else                               verbosity_ = HiEgammaSCEnergyCorrectionAlgo::pERROR;

  // the input producers
  rHInputProducerTag_ = ps.getParameter<edm::InputTag>("recHitProducer");
  sCInputProducerTag_ = ps.getParameter<edm::InputTag>("rawSuperClusterProducer");
  rHInputProducer_ = consumes<EcalRecHitCollection>(rHInputProducerTag_);
  sCInputProducer_ = consumes<reco::SuperClusterCollection>(sCInputProducerTag_);
  std::string sCAlgo_str = ps.getParameter<std::string>("superClusterAlgo");

  // determine which BasicCluster algo we are correcting for
  //And obtain forrection parameters form cfg file
  edm::ParameterSet fCorrPset;
  if (sCAlgo_str=="Hybrid") {
    sCAlgo_= reco::CaloCluster::hybrid;
    fCorrPset = ps.getParameter<edm::ParameterSet>("hyb_fCorrPset"); 
  } else if (sCAlgo_str=="Island") {
    sCAlgo_= reco::CaloCluster::island;
    fCorrPset = ps.getParameter<edm::ParameterSet>("isl_fCorrPset");
  } else if (sCAlgo_str=="DynamicHybrid") {
    sCAlgo_ = reco::CaloCluster::dynamicHybrid;
    fCorrPset = ps.getParameter<edm::ParameterSet>("dyn_fCorrPset"); 
  } else if (sCAlgo_str=="Multi5x5") {
    sCAlgo_ = reco::CaloCluster::multi5x5;
    fCorrPset = ps.getParameter<edm::ParameterSet>("fix_fCorrPset");
  } else {
    edm::LogError("HiEgammaSCCorrectionMakerError") 
      << "Error! SuperClusterAlgo in config file must be Hybrid or Island: " 
      << sCAlgo_str << "  Using Hybrid by default";
    sCAlgo_=reco::CaloCluster::hybrid;
  }
  
  // set correction algo parameters
  applyEnergyCorrection_ = ps.getParameter<bool>("applyEnergyCorrection");
  sigmaElectronicNoise_ =  ps.getParameter<double>("sigmaElectronicNoise");

  etThresh_ =  ps.getParameter<double>("etThresh");

  // set the producer parameters
  outputCollection_ = ps.getParameter<std::string>("corectedSuperClusterCollection");
  produces<reco::SuperClusterCollection>(outputCollection_);

  // instanciate the correction algo object
  energyCorrector_ = std::make_unique<HiEgammaSCEnergyCorrectionAlgo>(sigmaElectronicNoise_, sCAlgo_, fCorrPset, verbosity_);
  

  // energy correction class
  if (applyEnergyCorrection_ )
    EnergyCorrection_ = std::unique_ptr<EcalClusterFunctionBaseClass>{EcalClusterFunctionFactory::get()->create("EcalClusterEnergyCorrection", ps)};
}

HiEgammaSCCorrectionMaker::~HiEgammaSCCorrectionMaker() = default;

void
HiEgammaSCCorrectionMaker::produce(edm::Event& evt, const edm::EventSetup& es)
{
  using namespace edm;

  // initialize energy correction class
  if(applyEnergyCorrection_) 
    EnergyCorrection_->init(es);

  // get the collection geometry:
  edm::ESHandle<CaloGeometry> geoHandle;
  es.get<CaloGeometryRecord>().get(geoHandle);
  const CaloGeometry& geometry = *geoHandle;
  const CaloSubdetectorGeometry *geometry_p;

  edm::ESHandle<CaloTopology> pTopology;
  es.get<CaloTopologyRecord>().get(theCaloTopo_);
  const CaloTopology *topology = theCaloTopo_.product();

  std::string rHInputCollection = rHInputProducerTag_.instance();
  if(rHInputCollection == "EcalRecHitsEB") {
    geometry_p = geometry.getSubdetectorGeometry(DetId::Ecal, EcalBarrel);
  } else if(rHInputCollection == "EcalRecHitsEE") {
    geometry_p = geometry.getSubdetectorGeometry(DetId::Ecal, EcalEndcap);
  } else if(rHInputCollection == "EcalRecHitsPS") {
    geometry_p = geometry.getSubdetectorGeometry(DetId::Ecal, EcalPreshower);
  } else {
          std::string str = "\n\nSCCorrectionMaker encountered invalied ecalhitcollection type: " + rHInputCollection + ".\n\n";
          throw(std::runtime_error( str.c_str() ));
  }
  
  // Get raw SuperClusters from the event    
  Handle<reco::SuperClusterCollection> pRawSuperClusters;
  try { 
    evt.getByToken(sCInputProducer_, pRawSuperClusters);
  } catch ( cms::Exception& ex ) {
    edm::LogError("HiEgammaSCCorrectionMakerError") 
      << "Error! can't get the rawSuperClusters " 
      << sCInputProducerTag_.label() ;
  }    
  
  // Get the RecHits from the event
  Handle<EcalRecHitCollection> pRecHits;
  try { 
    evt.getByToken(rHInputProducer_, pRecHits);
  } catch ( cms::Exception& ex ) {
    edm::LogError("HiEgammaSCCorrectionMakerError") 
      << "Error! can't get the RecHits " 
      << rHInputProducerTag_.label();
  }    
  
  // Create a pointer to the RecHits and raw SuperClusters
  const EcalRecHitCollection *hitCollection = pRecHits.product();
  const reco::SuperClusterCollection *rawClusters = pRawSuperClusters.product();
   
  // Define a collection of corrected SuperClusters to put back into the event
  auto corrClusters = std::make_unique<reco::SuperClusterCollection>();
  
  //  Loop over raw clusters and make corrected ones
  reco::SuperClusterCollection::const_iterator aClus;
  for(aClus = rawClusters->begin(); aClus != rawClusters->end(); aClus++)
  {
     reco::SuperCluster newClus;
     if(applyEnergyCorrection_) 
        newClus = energyCorrector_->applyCorrection(*aClus, *hitCollection, sCAlgo_, geometry_p, topology, EnergyCorrection_.get());
     else
    newClus=*aClus;

     if(newClus.energy()*sin(newClus.position().theta())>etThresh_) {
        corrClusters->push_back(newClus);
     }
  }
  // Put collection of corrected SuperClusters into the event
  evt.put(std::move(corrClusters), outputCollection_);   
}

DEFINE_FWK_MODULE(HiEgammaSCCorrectionMaker);