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#ifndef PhysicsTools_PatAlgos_interface_VertexingHelper_h
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#define PhysicsTools_PatAlgos_interface_VertexingHelper_h
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/**
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\class pat::helper::VertexingHelper VertexingHelper.h "PhysicsTools/PatAlgos/interface/VertexingHelper.h"
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\brief Produces and/or checks pat::VertexAssociation's
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The VertexingHelper produces pat::VertexAssociation, or reads them from the event,
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and can use them to select if a candidate is good or not.
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\author Giovanni Petrucciani
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\version $Id: VertexingHelper.h,v 1.1 2008/07/22 12:47:01 gpetrucc Exp $
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*/
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#include "DataFormats/PatCandidates/interface/Vertexing.h"
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#include "DataFormats/Common/interface/ValueMap.h"
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#include "PhysicsTools/PatUtils/interface/VertexAssociationSelector.h"
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#include "FWCore/ParameterSet/interface/ParameterSet.h"
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#include "FWCore/Framework/interface/Event.h"
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#include "FWCore/Framework/interface/EventSetup.h"
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#include "FWCore/Framework/interface/ESHandle.h"
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#include "TrackingTools/TransientTrack/interface/TransientTrackBuilder.h"
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#include "PhysicsTools/UtilAlgos/interface/ParameterAdapter.h"
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namespace reco {
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namespace modules {
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/// Helper struct to convert from ParameterSet to ElectronSelection
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template<>
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struct ParameterAdapter<pat::VertexAssociationSelector> {
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static pat::VertexAssociationSelector make(const edm::ParameterSet & iConfig) {
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pat::VertexAssociationSelector::Config assoconf;
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if (iConfig.existsAs<double>("deltaZ")) assoconf.dZ = iConfig.getParameter<double>("deltaZ");
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if (iConfig.existsAs<double>("deltaR")) assoconf.dR = iConfig.getParameter<double>("deltaR");
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if (iConfig.existsAs<double>("sigmasZ")) assoconf.sigmasZ = iConfig.getParameter<double>("sigmasZ");
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if (iConfig.existsAs<double>("sigmasR")) assoconf.sigmasR = iConfig.getParameter<double>("sigmasR");
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return pat::VertexAssociationSelector(assoconf);
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}
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};
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}
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}
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namespace pat { namespace helper {
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class VertexingHelper {
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public:
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VertexingHelper() : enabled_(false) {}
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VertexingHelper(const edm::ParameterSet &iConfig) ;
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/// returns true if this was given a non dummy configuration
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bool enabled() const { return enabled_; }
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/// To be called for each new event, reads in the vertex collection
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void newEvent(const edm::Event &event) ;
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/// To be called for each new event, reads in the vertex collection and the tracking info
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/// You need this if 'useTrack' is true
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void newEvent(const edm::Event &event, const edm::EventSetup & setup) ;
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/// Return true if this candidate is associated to a valid vertex
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/// AnyCandRef should be a Ref<>, RefToBase<> or Ptr to a Candidate object
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template<typename AnyCandRef>
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pat::VertexAssociation operator()(const AnyCandRef &) const ;
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private:
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/// true if it has non null configuration
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bool enabled_;
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/// true if it's just reading the associations from the event
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bool playback_;
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/// selector of associations
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pat::VertexAssociationSelector assoSelector_;
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//-------- Tools for production of vertex associations -------
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edm::InputTag vertices_;
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edm::Handle<reco::VertexCollection > vertexHandle_;
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/// use tracks inside candidates
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bool useTracks_;
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edm::ESHandle<TransientTrackBuilder> ttBuilder_;
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//--------- Tools for reading vertex associations (playback mode) -----
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edm::InputTag vertexAssociations_;
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edm::Handle<edm::ValueMap<pat::VertexAssociation> > vertexAssoMap_;
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/// Get out the track from the Candidate / RecoCandidate / PFCandidate
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reco::TrackBaseRef getTrack_(const reco::Candidate &c) const ;
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/// Try to associated this candidate to a vertex.
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/// If no association is found passing all cuts, return a null association
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pat::VertexAssociation associate(const reco::Candidate &) const ;
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}; // class
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template<typename AnyCandRef>
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pat::VertexAssociation
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pat::helper::VertexingHelper::operator()(const AnyCandRef &cand) const
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{
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if (playback_) {
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const pat::VertexAssociation &assoc = (*vertexAssoMap_)[cand];
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return assoSelector_(assoc) ? assoc : pat::VertexAssociation();
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} else {
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return associate( *cand );
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}
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}
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} }
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#endif
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