/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/RecoTauTag/HLTProducers/src/L1HLTTauMatching.cc

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#include "RecoTauTag/HLTProducers/interface/L1HLTTauMatching.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"
#include "DataFormats/TauReco/interface/PFTau.h"

//
// class decleration
//
using namespace reco;
using namespace std;
using namespace edm;
using namespace l1extra;

L1HLTTauMatching::L1HLTTauMatching(const edm::ParameterSet& iConfig)
{
  jetSrc = iConfig.getParameter<InputTag>("JetSrc");
  tauTrigger = iConfig.getParameter<InputTag>("L1TauTrigger");
  mEt_Min = iConfig.getParameter<double>("EtMin");
  
  produces<PFTauCollection>();
}
L1HLTTauMatching::~L1HLTTauMatching(){ }

void L1HLTTauMatching::produce(edm::Event& iEvent, const edm::EventSetup& iES)
{
        
        using namespace edm;
        using namespace std;
        using namespace reco;
        using namespace trigger;
        using namespace l1extra;
        
          auto_ptr<PFTauCollection> tauL2jets(new PFTauCollection);
        
        double deltaR = 1.0;
        double matchingR = 0.5;
        //Getting HLT jets to be matched
        edm::Handle<PFTauCollection > tauJets;
        iEvent.getByLabel( jetSrc, tauJets );

//              std::cout <<"Size of input jet collection "<<tauJets->size()<<std::endl;
                
        edm::Handle<trigger::TriggerFilterObjectWithRefs> l1TriggeredTaus;
    iEvent.getByLabel(tauTrigger,l1TriggeredTaus);
                
                
                tauCandRefVec.clear();
                jetCandRefVec.clear();
                
                l1TriggeredTaus->getObjects( trigger::TriggerL1TauJet,tauCandRefVec);
                l1TriggeredTaus->getObjects( trigger::TriggerL1CenJet,jetCandRefVec);
                math::XYZPoint a(0.,0.,0.);
                CaloJet::Specific f;
                
                for( unsigned int iL1Tau=0; iL1Tau <tauCandRefVec.size();iL1Tau++)
                {  
                        for(unsigned int iJet=0;iJet<tauJets->size();iJet++)
                        {
                                //Find the relative L2TauJets, to see if it has been reconstructed
                                const PFTau &  myJet = (*tauJets)[iJet];
                                deltaR = ROOT::Math::VectorUtil::DeltaR(myJet.p4().Vect(), (tauCandRefVec[iL1Tau]->p4()).Vect());
                                if(deltaR < matchingR ) {
                                        //               LeafCandidate myLC(myJet);
                    if(myJet.leadPFChargedHadrCand().isNonnull()){
                        a =  myJet.leadPFChargedHadrCand()->vertex();  
                    }
                                  PFTau myPFTau(std::numeric_limits<int>::quiet_NaN(), myJet.p4(), a);
                                        if(myJet.pt() > mEt_Min) {
                                                //                tauL2LC->push_back(myLC);
                                                tauL2jets->push_back(myPFTau);
                                        }
                                        break;
                                }
                        }
                }  
                
                for(unsigned int iL1Tau=0; iL1Tau <jetCandRefVec.size();iL1Tau++)
                {  
                        for(unsigned int iJet=0;iJet<tauJets->size();iJet++)
                        {
                                const PFTau &  myJet = (*tauJets)[iJet];
                                //Find the relative L2TauJets, to see if it has been reconstructed
                                deltaR = ROOT::Math::VectorUtil::DeltaR(myJet.p4().Vect(), (jetCandRefVec[iL1Tau]->p4()).Vect());
                                if(deltaR < matchingR ) {
                                        //               LeafCandidate myLC(myJet);
                    if(myJet.leadPFChargedHadrCand().isNonnull()){
                        a =  myJet.leadPFChargedHadrCand()->vertex();  
                    }
                    
                                  PFTau myPFTau(std::numeric_limits<int>::quiet_NaN(), myJet.p4(),a);
                                        if(myJet.pt() > mEt_Min) {
                                                //tauL2LC->push_back(myLC);
                                                tauL2jets->push_back(myPFTau);
                                        }
                                        break;
                                }
                        }
                }
        

//std::cout <<"Size of L1HLT matched jets "<<tauL2jets->size()<<std::endl;

iEvent.put(tauL2jets);
// iEvent.put(tauL2LC);
}