/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/PhysicsTools/PatAlgos/interface/KinResolutionsLoader.h

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#ifndef PhysicsTools_PatAlgos_KinResolutionsLoader_h
#define PhysicsTools_PatAlgos_KinResolutionsLoader_h

#include "DataFormats/PatCandidates/interface/PATObject.h"

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"

#include "PhysicsTools/PatAlgos/interface/KinematicResolutionProvider.h"


namespace pat { namespace helper {
class KinResolutionsLoader {
    public:
        KinResolutionsLoader() {}

        KinResolutionsLoader(const edm::ParameterSet &iConfig) ;

        bool enabled() const { return !patlabels_.empty(); }
     
        void newEvent(const edm::Event &event, const edm::EventSetup &setup) const ;

        template<typename T>
        void setResolutions( pat::PATObject<T> &obj ) const ;

        static void fillDescription(edm::ParameterSetDescription & iDesc);
    private:
        std::vector<std::string>   patlabels_;
        std::vector<std::string>   eslabels_;
        mutable std::vector<edm::ESHandle<KinematicResolutionProvider> > handles_;
}; // class

template<typename T>
void
KinResolutionsLoader::setResolutions( pat::PATObject<T> &obj ) const
{
    for (size_t i = 0, n = patlabels_.size(); i < n; ++i) {
        obj.setKinResolution( handles_[i]->getResolution(obj), patlabels_[i]);
    }
}

} }

#endif