JetResolution.h

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#ifndef Analysis_Tools_JetResolution_h
#define Analysis_Tools_JetResolution_h

// Original code: CMSSW_10_2_22 - JetMETCorrections/Modules/interface/JetResolution.h

// If you want to use the JER code in standalone mode, you'll need to create a new define named 'STANDALONE'. If you use gcc for compiling, you'll need to add
// -DSTANDALONE to the command line
// In standalone mode, no reference to CMSSW exists, so the only way to retrieve resolutions and scale factors are from text files.

#include  "Analysis/Tools/interface/JetResolutionObject.h" 

namespace JME {
    class JetResolution {
        public:
            JetResolution(const std::string& filename);
            JetResolution(const JetResolutionObject& object);
            JetResolution() {
                // Empty
            }

            float getResolution(const JetParameters& parameters) const;

            void dump() const {
                m_object->dump();
            }

            // Advanced usage
            const JetResolutionObject* getResolutionObject() const {
                return m_object.get();
            }

        private:
            std::shared_ptr<JetResolutionObject> m_object;
    };

    class JetResolutionScaleFactor {
        public:
            JetResolutionScaleFactor(const std::string& filename);
            JetResolutionScaleFactor(const JetResolutionObject& object);
            JetResolutionScaleFactor() {
                // Empty
            }

            float getScaleFactor(const JetParameters& parameters,
                                 Variation variation = Variation::NOMINAL,
                                 std::string uncertaintySource = "") const;

            void dump() const {
                m_object->dump();
            }

            // Advanced usage
            const JetResolutionObject* getResolutionObject() const {
                return m_object.get();
            }

        private:
            std::shared_ptr<JetResolutionObject> m_object;
    };

};

#endif