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/**
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\class pat::PATVertexAssociationProducer PATVertexAssociationProducer.h "PhysicsTools/PatAlgos/interface/PATVertexAssociationProducer.h"
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\brief Produces VertexAssociation and a ValueMap to the originating
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reco jets
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The PATVertexAssociationProducer produces a set of vertex associations for one or more
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collection of Candidates, and saves them in a ValueMap in the event.
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These can be retrieved in PAT Layer 1 to be embedded in PAT Objects
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\author Giovanni Petrucciani
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\version $Id: VertexAssociationProducer.cc,v 1.1 2008/07/22 12:47:02 gpetrucc Exp $
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*/
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#include "FWCore/Framework/interface/EDProducer.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/ParameterSet/interface/InputTag.h"
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#include "DataFormats/Common/interface/ValueMap.h"
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#include "DataFormats/Common/interface/View.h"
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#include "DataFormats/PatCandidates/interface/Vertexing.h"
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#include "PhysicsTools/PatAlgos/interface/VertexingHelper.h"
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namespace pat {
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class PATVertexAssociationProducer : public edm::EDProducer {
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typedef edm::ValueMap<pat::VertexAssociation> VertexAssociationMap;
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public:
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explicit PATVertexAssociationProducer(const edm::ParameterSet & iConfig);
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~PATVertexAssociationProducer();
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virtual void produce(edm::Event & iEvent, const edm::EventSetup & iSetup);
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private:
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typedef std::vector<edm::InputTag> VInputTag;
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// configurables
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std::vector<edm::InputTag> particles_;
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pat::helper::VertexingHelper vertexing_;
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};
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}
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using pat::PATVertexAssociationProducer;
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PATVertexAssociationProducer::PATVertexAssociationProducer(const edm::ParameterSet& iConfig) :
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particles_( iConfig.existsAs<VInputTag>("candidates") ? // if it's a VInputTag
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iConfig.getParameter<VInputTag>("candidates") :
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VInputTag(1, iConfig.getParameter<edm::InputTag>("candidates")) ),
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vertexing_(iConfig)
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{
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produces<VertexAssociationMap>();
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}
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PATVertexAssociationProducer::~PATVertexAssociationProducer() {
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}
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void PATVertexAssociationProducer::produce(edm::Event & iEvent, const edm::EventSetup & iSetup) {
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using namespace edm; using namespace std;
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// read in vertices and EventSetup
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vertexing_.newEvent(iEvent, iSetup);
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// prepare room and tools for output
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auto_ptr<VertexAssociationMap> result(new VertexAssociationMap());
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VertexAssociationMap::Filler filler(*result);
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vector<pat::VertexAssociation> assos;
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// loop on input tags
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for (VInputTag::const_iterator it = particles_.begin(), end = particles_.end(); it != end; ++it) {
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// read candidates
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Handle<View<reco::Candidate> > cands;
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iEvent.getByLabel(*it, cands);
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assos.clear(); assos.reserve(cands->size());
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// loop on candidates
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for (size_t i = 0, n = cands->size(); i < n; ++i) {
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assos.push_back( vertexing_(cands->refAt(i)) );
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}
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// insert into ValueMap
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filler.insert(cands, assos.begin(), assos.end());
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}
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// do the real filling
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filler.fill();
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// put our produced stuff in the event
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iEvent.put(result);
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}
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#include "FWCore/Framework/interface/MakerMacros.h"
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DEFINE_FWK_MODULE(PATVertexAssociationProducer);
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