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#ifndef PhysicsTools_PatAlgos_EfficiencyLoader_h
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#define PhysicsTools_PatAlgos_EfficiencyLoader_h
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#include "DataFormats/PatCandidates/interface/PATObject.h"
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#include "DataFormats/PatCandidates/interface/LookupTableRecord.h"
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#include "DataFormats/Common/interface/Handle.h"
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#include "DataFormats/Common/interface/ValueMap.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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namespace pat { namespace helper {
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class EfficiencyLoader {
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public:
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/// Empty constructor
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EfficiencyLoader() {}
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/// Constructor from a PSet
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EfficiencyLoader(const edm::ParameterSet &iConfig) ;
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/// 'true' if this there is at least one efficiency configured
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bool enabled() const { return !names_.empty(); }
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/// To be called for each new event, reads in the ValueMaps for efficiencies
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void newEvent(const edm::Event &event) const ;
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/// Sets the efficiencies for this object, using the reference to the original objects
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template<typename T, typename R>
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void setEfficiencies( pat::PATObject<T> &obj, const R & originalRef ) const ;
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private:
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std::vector<std::string> names_;
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std::vector<edm::InputTag> tags_;
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mutable std::vector<edm::Handle< edm::ValueMap<pat::LookupTableRecord> > > handles_;
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}; // class
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template<typename T, typename R>
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void
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EfficiencyLoader::setEfficiencies( pat::PATObject<T> &obj, const R & originalRef ) const
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{
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for (size_t i = 0, n = names_.size(); i < n; ++i) {
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obj.setEfficiency(names_[i], (* handles_[i])[originalRef] );
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}
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}
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} }
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#endif
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