/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_13_patch3/src/RecoTauTag/HLTProducers/src/L2TauJetsProvider.cc

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#include "RecoTauTag/HLTProducers/interface/L2TauJetsProvider.h"
#include "Math/GenVector/VectorUtil.h"
#include "DataFormats/L1Trigger/interface/L1JetParticle.h"
#include "DataFormats/L1Trigger/interface/L1JetParticleFwd.h"
#include "DataFormats/HLTReco/interface/TriggerTypeDefs.h"
#include "FWCore/Utilities/interface/EDMException.h"
//
// class decleration
//
using namespace reco;
using namespace std;
using namespace edm;
using namespace l1extra;

L2TauJetsProvider::L2TauJetsProvider(const edm::ParameterSet& iConfig)
{
  jetSrc = iConfig.getParameter<vtag>("JetSrc");
  l1ParticlesTau = iConfig.getParameter<InputTag>("L1ParticlesTau");
  l1ParticlesJet = iConfig.getParameter<InputTag>("L1ParticlesJet");
  tauTrigger = iConfig.getParameter<InputTag>("L1TauTrigger");
  mEt_Min = iConfig.getParameter<double>("EtMin");
  
  produces<CaloJetCollection>();
}

L2TauJetsProvider::~L2TauJetsProvider(){ }

void L2TauJetsProvider::produce(edm::Event& iEvent, const edm::EventSetup& iES)
{

 using namespace edm;
 using namespace std;
 using namespace reco;
 using namespace trigger;
 using namespace l1extra;


 //Getting all the L1Seeds

 
 //Getting the Collections of L2ReconstructedJets from L1Seeds
 //and removing the collinear jets
 myL2L1JetsMap.clear();
 int iL1Jet = 0;
 for( vtag::const_iterator s = jetSrc.begin(); s != jetSrc.end(); ++ s ) {
   edm::Handle<CaloJetCollection> tauJets;
   iEvent.getByLabel( * s, tauJets );
   CaloJetCollection::const_iterator iTau = tauJets->begin();
   if(iTau != tauJets->end()){
     //Create a Map to associate to every Jet its L1SeedId, i.e. 0,1,2 or 3
     myL2L1JetsMap.insert(std::pair<int, const CaloJet>(iL1Jet, *(iTau)));
   }
   iL1Jet++;
 }
 std::auto_ptr<CaloJetCollection> tauL2jets(new CaloJetCollection);

 //Loop over the jetSrc to select the proper jets
  
  double deltaR = 0.1;
  double matchingR = 0.01;
  //Loop over the Map to find which jets has fired the trigger
  //myL1Tau is the Collection of L1TauCandidates (from 0 to max  4 elements)
  //get the list of trigger candidates from the HLTL1SeedGT filter
  edm::Handle< L1JetParticleCollection > tauColl ; 
  edm::Handle< L1JetParticleCollection > jetColl ; 
  
  iEvent.getByLabel( l1ParticlesTau, tauColl );
  iEvent.getByLabel(l1ParticlesJet, jetColl);

  const L1JetParticleCollection  myL1Tau = *(tauColl.product());

  const L1JetParticleCollection  myL1Jet = *(jetColl.product());  

    L1JetParticleCollection myL1Obj;
    myL1Obj.reserve(8);
    
    for(unsigned int i=0;i<myL1Tau.size();i++)
      {
        myL1Obj.push_back(myL1Tau[i]);
      }
    for(unsigned int j=0;j<myL1Jet.size();j++)
      {
        myL1Obj.push_back(myL1Jet[j]);
      }


    edm::Handle<trigger::TriggerFilterObjectWithRefs> l1TriggeredTaus;
    if(iEvent.getByLabel(tauTrigger,l1TriggeredTaus)){
    
      
      tauCandRefVec.clear();
      jetCandRefVec.clear();
      
      l1TriggeredTaus->getObjects( trigger::TriggerL1TauJet,tauCandRefVec);
      l1TriggeredTaus->getObjects( trigger::TriggerL1CenJet,jetCandRefVec);
      
      for( unsigned int iL1Tau=0; iL1Tau <tauCandRefVec.size();iL1Tau++)
        {  
          for(unsigned int iJet=0;iJet<myL1Obj.size();iJet++)
            {
              //Find the relative L2TauJets, to see if it has been reconstructed
            std::map<int, const reco::CaloJet>::const_iterator myL2itr = myL2L1JetsMap.find(iJet);
            if(myL2itr!=myL2L1JetsMap.end()){
              //Calculate the DeltaR between L1TauCandidate and L1Tau which fired the trigger
              if(&tauCandRefVec[iL1Tau]) 
                deltaR = ROOT::Math::VectorUtil::DeltaR(myL1Obj[iJet].p4().Vect(), (tauCandRefVec[iL1Tau]->p4()).Vect());
              if(deltaR < matchingR ) {
              //              Getting back from the map the L2TauJet
                const CaloJet myL2TauJet = myL2itr->second;
                if(myL2TauJet.pt() > mEt_Min) tauL2jets->push_back(myL2TauJet);
                myL2L1JetsMap.erase(myL2itr->first);
                break;
                
              }
            }
            
          }
      }
      
    for(unsigned int iL1Tau=0; iL1Tau <jetCandRefVec.size();iL1Tau++)
      {  
        for(unsigned int iJet=0;iJet<myL1Obj.size();iJet++)
          {
            //Find the relative L2TauJets, to see if it has been reconstructed
            std::map<int, const reco::CaloJet>::const_iterator myL2itr = myL2L1JetsMap.find(iJet);
            if(myL2itr!=myL2L1JetsMap.end()){
              //Calculate the DeltaR between L1TauCandidate and L1Tau which fired the trigger
              if(&jetCandRefVec[iL1Tau])
                deltaR = ROOT::Math::VectorUtil::DeltaR(myL1Obj[iJet].p4().Vect(), (jetCandRefVec[iL1Tau]->p4()).Vect());
              if(deltaR < matchingR) {
                // Getting back from the map the L2TauJet
                const CaloJet myL2TauJet = myL2itr->second;
                
                if(myL2TauJet.pt() > mEt_Min) tauL2jets->push_back(myL2TauJet);
                myL2L1JetsMap.erase(myL2itr->first);
                break;
                
              }
            }
            
          }
      }
    
  }
  //  std::cout <<"Size of L2 jets "<<tauL2jets->size()<<std::endl;

  iEvent.put(tauL2jets);

}