HLTHcalPFClusterIsolationProducer.cc

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#include <iostream>
#include <vector>
#include <memory>

#include "RecoEgamma/EgammaHLTProducers/interface/HLTHcalPFClusterIsolationProducer.h"

// Framework
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"

#include "RecoEgamma/EgammaIsolationAlgos/interface/HcalPFClusterIsolation.h"
#include "HLTrigger/HLTcore/interface/defaultModuleLabel.h"

template<typename T1>
HLTHcalPFClusterIsolationProducer<T1>::HLTHcalPFClusterIsolationProducer(const edm::ParameterSet& config) :
  pfClusterProducerHCAL_  ( consumes<reco::PFClusterCollection>(config.getParameter<edm::InputTag>("pfClusterProducerHCAL"))),
  rhoProducer_            ( consumes<double>(config.getParameter<edm::InputTag>("rhoProducer"))),
  pfClusterProducerHFEM_  ( consumes<reco::PFClusterCollection>(config.getParameter<edm::InputTag>("pfClusterProducerHFEM"))),
  pfClusterProducerHFHAD_ ( consumes<reco::PFClusterCollection>(config.getParameter<edm::InputTag>("pfClusterProducerHFHAD"))),
  useHF_                  ( config.getParameter<bool>("useHF")),
  drMax_                  ( config.getParameter<double>("drMax")),
  drVetoBarrel_           ( config.getParameter<double>("drVetoBarrel")),
  drVetoEndcap_           ( config.getParameter<double>("drVetoEndcap")),
  etaStripBarrel_         ( config.getParameter<double>("etaStripBarrel")),
  etaStripEndcap_         ( config.getParameter<double>("etaStripEndcap")),
  energyBarrel_           ( config.getParameter<double>("energyBarrel")),
  energyEndcap_           ( config.getParameter<double>("energyEndcap")),
  useEt_                  ( config.getParameter<bool>("useEt")),
  doRhoCorrection_        ( config.getParameter<bool>("doRhoCorrection")),
  rhoMax_                 ( config.getParameter<double>("rhoMax")),
  rhoScale_               ( config.getParameter<double>("rhoScale")),
  effectiveAreas_         ( config.getParameter<std::vector<double> >("effectiveAreas")) ,
  absEtaLowEdges_         ( config.getParameter<std::vector<double> >("absEtaLowEdges")) {

  if (doRhoCorrection_) {
    if (absEtaLowEdges_.size() != effectiveAreas_.size())
      throw cms::Exception("IncompatibleVects") << "absEtaLowEdges and effectiveAreas should be of the same size. \n";

    if (absEtaLowEdges_.at(0) != 0.0)
      throw cms::Exception("IncompleteCoverage") << "absEtaLowEdges should start from 0. \n";

    for (unsigned int aIt = 0; aIt < absEtaLowEdges_.size() - 1; aIt++) {
      if ( !(absEtaLowEdges_.at( aIt ) < absEtaLowEdges_.at( aIt + 1 )) )
        throw cms::Exception("ImproperBinning") << "absEtaLowEdges entries should be in increasing order. \n";
    }
  }
  
  std::string recoCandidateProducerName = "recoCandidateProducer";
  if ((typeid(HLTHcalPFClusterIsolationProducer<T1>) == typeid(HLTHcalPFClusterIsolationProducer<reco::RecoEcalCandidate>))) recoCandidateProducerName = "recoEcalCandidateProducer";
  recoCandidateProducer_ = consumes<T1Collection>(config.getParameter<edm::InputTag>(recoCandidateProducerName));
  
  produces <T1IsolationMap >();
}

template<typename T1>
HLTHcalPFClusterIsolationProducer<T1>::~HLTHcalPFClusterIsolationProducer()
{}

template<typename T1>
void HLTHcalPFClusterIsolationProducer<T1>::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
 
  std::string recoCandidateProducerName = "recoCandidateProducer";
  if ((typeid(HLTHcalPFClusterIsolationProducer<T1>) == typeid(HLTHcalPFClusterIsolationProducer<reco::RecoEcalCandidate>))) recoCandidateProducerName = "recoEcalCandidateProducer";

  edm::ParameterSetDescription desc;
  desc.add<edm::InputTag>(recoCandidateProducerName, edm::InputTag("hltL1SeededRecoEcalCandidatePF"));
  desc.add<edm::InputTag>("pfClusterProducerHCAL", edm::InputTag("hltParticleFlowClusterHCAL"));
  desc.ifValue(edm::ParameterDescription<bool>("useHF", false, true),
           true >> (edm::ParameterDescription<edm::InputTag>("pfClusterProducerHFEM", edm::InputTag("hltParticleFlowClusterHFEM"), true) and
            edm::ParameterDescription<edm::InputTag>("pfClusterProducerHFHAD", edm::InputTag("hltParticleFlowClusterHFHAD"), true)) or
           false >> (edm::ParameterDescription<edm::InputTag>("pfClusterProducerHFEM", edm::InputTag(""), true) and
             edm::ParameterDescription<edm::InputTag>("pfClusterProducerHFHAD", edm::InputTag(""), true)));
  desc.add<edm::InputTag>("rhoProducer", edm::InputTag("fixedGridRhoFastjetAllCalo"));
  desc.add<bool>("doRhoCorrection", false);
  desc.add<double>("rhoMax", 9.9999999E7); 
  desc.add<double>("rhoScale", 1.0); 
  desc.add<double>("drMax", 0.3);
  desc.add<double>("drVetoBarrel", 0.0);
  desc.add<double>("drVetoEndcap", 0.0);
  desc.add<double>("etaStripBarrel", 0.0);
  desc.add<double>("etaStripEndcap", 0.0);
  desc.add<double>("energyBarrel", 0.0);
  desc.add<double>("energyEndcap", 0.0);
  desc.add<bool>("useEt", true);
  desc.add<std::vector<double> >("effectiveAreas", {0.2, 0.25}); // 2016 post-ichep sinEle default
  desc.add<std::vector<double> >("absEtaLowEdges", {0.0, 1.479}); // Barrel, Endcap
  descriptions.add(defaultModuleLabel<HLTHcalPFClusterIsolationProducer<T1>>(), desc);
}

template<typename T1>
void HLTHcalPFClusterIsolationProducer<T1>::produce(edm::StreamID sid, edm::Event& iEvent, const edm::EventSetup& iSetup) const {
  
  edm::Handle<double> rhoHandle;
  double rho = 0.0;
  if (doRhoCorrection_) {
    iEvent.getByToken(rhoProducer_, rhoHandle);
    rho = *(rhoHandle.product());
  }
  
  if (rho > rhoMax_)
    rho = rhoMax_;
  
  rho = rho*rhoScale_;

  edm::Handle<T1Collection> recoCandHandle;

  std::vector<edm::Handle<reco::PFClusterCollection>> clusterHandles;  
  edm::Handle<reco::PFClusterCollection> clusterHcalHandle;
  edm::Handle<reco::PFClusterCollection> clusterHfemHandle;
  edm::Handle<reco::PFClusterCollection> clusterHfhadHandle;

  iEvent.getByToken(recoCandidateProducer_,recoCandHandle);
  iEvent.getByToken(pfClusterProducerHCAL_, clusterHcalHandle);
  //const reco::PFClusterCollection* forIsolationHcal = clusterHcalHandle.product();
  clusterHandles.push_back(clusterHcalHandle);

  if (useHF_) {
    iEvent.getByToken(pfClusterProducerHFEM_, clusterHfemHandle);
    clusterHandles.push_back(clusterHfemHandle);
    iEvent.getByToken(pfClusterProducerHFHAD_, clusterHfhadHandle);
    clusterHandles.push_back(clusterHfhadHandle);
  }

  T1IsolationMap recoCandMap(recoCandHandle);
  HcalPFClusterIsolation<T1> isoAlgo(drMax_, drVetoBarrel_, drVetoEndcap_, etaStripBarrel_, etaStripEndcap_, energyBarrel_, energyEndcap_, useEt_);
  
  for (unsigned int iReco = 0; iReco < recoCandHandle->size(); iReco++) {
    T1Ref candRef(recoCandHandle, iReco);
        
    float sum = isoAlgo.getSum(candRef, clusterHandles);
 
    if (doRhoCorrection_) {
      int iEA = -1;
      auto cEta = std::abs(candRef->eta());
      for (int bIt = absEtaLowEdges_.size() - 1; bIt > -1; bIt--) {
        if ( cEta > absEtaLowEdges_.at(bIt) ) {
          iEA = bIt;
          break;
        }
      }

      sum = sum - rho*effectiveAreas_.at(iEA);
    }

    recoCandMap.insert(candRef, sum);
  }
  
  std::auto_ptr<T1IsolationMap> mapForEvent(new T1IsolationMap(recoCandMap));
  iEvent.put(mapForEvent);
}

typedef HLTHcalPFClusterIsolationProducer<reco::RecoEcalCandidate> EgammaHLTHcalPFClusterIsolationProducer;
typedef HLTHcalPFClusterIsolationProducer<reco::RecoChargedCandidate> MuonHLTHcalPFClusterIsolationProducer;

DEFINE_FWK_MODULE(EgammaHLTHcalPFClusterIsolationProducer);
DEFINE_FWK_MODULE(MuonHLTHcalPFClusterIsolationProducer);