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#ifndef ForwardAnalysis_Utilities_TrackMultiplicityEdmNtupleDumper_h
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#define ForwardAnalysis_Utilities_TrackMultiplicityEdmNtupleDumper_h
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#include "FWCore/Framework/interface/EDProducer.h"
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#include "FWCore/ParameterSet/interface/ParameterSet.h"
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class TrackMultiplicityEdmNtupleDumper : public edm::EDProducer {
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public:
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TrackMultiplicityEdmNtupleDumper( const edm::ParameterSet & );
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private:
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void produce( edm::Event &, const edm::EventSetup & );
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edm::InputTag tracksTag_;
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};
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#endif
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#include "DataFormats/Common/interface/Handle.h"
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#include "FWCore/Framework/interface/Event.h"
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#include "FWCore/ParameterSet/interface/ParameterSet.h"
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#include "FWCore/Framework/interface/MakerMacros.h"
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#include "DataFormats/TrackReco/interface/TrackFwd.h"
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#include "DataFormats/TrackReco/interface/Track.h"
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using namespace reco;
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TrackMultiplicityEdmNtupleDumper::TrackMultiplicityEdmNtupleDumper(const edm::ParameterSet& pset) {
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tracksTag_ = pset.getParameter<edm::InputTag>("src");
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std::string alias;
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produces<unsigned int>( alias = "trackMultiplicity" ).setBranchAlias( alias );
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produces<unsigned int>( alias = "trackMultiplicityEtaPlus" ).setBranchAlias( alias );
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produces<unsigned int>( alias = "trackMultiplicityEtaMinus" ).setBranchAlias( alias );
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}
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void TrackMultiplicityEdmNtupleDumper::produce(edm::Event& event, const edm::EventSetup& setup) {
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// Tracks
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edm::Handle<edm::View<Track> > trackCollectionH;
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event.getByLabel(tracksTag_,trackCollectionH);
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const edm::View<reco::Track>& trkColl = *(trackCollectionH.product());
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unsigned int ntracks = 0;
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unsigned int ntracks_plus = 0;
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unsigned int ntracks_minus = 0;
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for(edm::View<Track>::const_iterator track = trkColl.begin(); track != trkColl.end(); ++track){
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++ntracks;
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if(track->eta() >= 0.) ++ntracks_plus;
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else ++ntracks_minus;
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}
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std::auto_ptr<unsigned int> trackMultiplicity(new unsigned int(ntracks));
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std::auto_ptr<unsigned int> trackMultiplicityEtaPlus(new unsigned int(ntracks_plus));
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std::auto_ptr<unsigned int> trackMultiplicityEtaMinus(new unsigned int(ntracks_minus));
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event.put(trackMultiplicity,"trackMultiplicity");
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event.put(trackMultiplicityEtaPlus,"trackMultiplicityEtaPlus");
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event.put(trackMultiplicityEtaMinus,"trackMultiplicityEtaMinus");
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}
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DEFINE_FWK_MODULE(TrackMultiplicityEdmNtupleDumper);
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