GenRunInfoProduct.h

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#ifndef SimDataFormats_GeneratorProducts_GenRunInfoProduct_h
#define SimDataFormats_GeneratorProducts_GenRunInfoProduct_h

class GenRunInfoProduct {
    public:
    // a few forward declarations
    struct XSec;

    // constructors, destructors
    GenRunInfoProduct();
    GenRunInfoProduct(const GenRunInfoProduct &other);

    // getters

    const XSec &internalXSec() const { return internalXSec_; }
    const XSec &externalXSecLO() const { return externalXSecLO_; }
    const XSec &externalXSecNLO() const { return externalXSecNLO_; }
    double filterEfficiency() const { return externalFilterEfficiency_; }

    // setters

    void setInternalXSec(const XSec &xsec) { internalXSec_ = xsec; }
    void setExternalXSecLO(const XSec &xsec) { externalXSecLO_ = xsec; }
    void setExternalXSecNLO(const XSec &xsec) { externalXSecNLO_ = xsec; }
    void setFilterEfficiency(double effic) { externalFilterEfficiency_ = effic; }

    // struct definitions
    struct XSec {
        public:
        XSec() : value_(-1.), error_(-1.) {}
        XSec(double value, double error = -1.) :
            value_(value), error_(error) {}
        XSec(const XSec &other) :
            value_(other.value_), error_(other.error_) {}

        double value() const { return value_; }
        double error() const { return error_; }

        bool isSet() const { return value_ >= 0.; }
        bool hasError() const { return error_ >= 0.; }

        operator double() const { return value_; }
        operator bool() const { return isSet(); }

        bool operator == (const XSec &other) const
        { return value_ == other.value_ && error_ == other.error_; }
        bool operator != (const XSec &other) const { return !(*this == other); }

        private:
        double value_, error_;
    };

    // convenience (return the value, prefer externally specified over internal one)
    double crossSection() const
    { return externalXSecLO_ ? externalXSecLO_.value() : internalXSec_.value(); }

    // methods used by EDM
    bool isProductEqual(const GenRunInfoProduct &other) const;

    private:
    // cross sections
    XSec    internalXSec_;  // the one computed during cmsRun
    XSec    externalXSecLO_, externalXSecNLO_;  // from config file
    double  externalFilterEfficiency_;      // from config file
};

#endif // SimDataFormats_GeneratorProducts_GenRunInfoProduct_h