| da0e9ce3 |
1 | //-------------------------------------------------------------------------- |
| 2 | // |
| 3 | // |
| 4 | // Copyright Information: See EvtGen/COPYRIGHT |
| 5 | // |
| 6 | // Environment: |
| 7 | // This software is part of the EvtGen package developed jointly |
| 8 | // for the BaBar and CLEO collaborations. If you use all or part |
| 9 | // of it, please give an appropriate acknowledgement. |
| 10 | // |
| 11 | // Module: EvtItgAbsFunction.hh |
| 12 | // |
| 13 | // Description: |
| 14 | // Abstraction of a generic function for use in integration methods elsewhere |
| 15 | // in this package. (Stolen and modified from the BaBar IntegrationUtils package |
| 16 | // - author: Phil Strother). |
| 17 | // |
| 18 | // Modification history: |
| 19 | // |
| 20 | // Jane Tinslay March 21, 2001 Module adapted for use in |
| 21 | // EvtGen |
| 22 | // |
| 23 | //------------------------------------------------------------------------ |
| 24 | |
| 25 | #ifndef EVTITGABSFUNCTION_HH |
| 26 | #define EVTITGABSFUNCTION_HH |
| 27 | |
| 28 | //------------- |
| 29 | // C Headers -- |
| 30 | //------------- |
| 31 | extern "C" { |
| 32 | } |
| 33 | |
| 34 | class EvtItgAbsFunction { |
| 35 | |
| 36 | public: |
| 37 | |
| 38 | // Constructors |
| 39 | |
| 40 | EvtItgAbsFunction(double lowerRange, double upperRange); |
| 41 | |
| 42 | // Destructor |
| 43 | virtual ~EvtItgAbsFunction( ); |
| 44 | |
| 45 | virtual double value( double x) const; |
| 46 | |
| 47 | virtual double operator()(double x) const; |
| 48 | |
| 49 | // Selectors (const) |
| 50 | |
| 51 | inline double upperRange() const {return _upperRange;} |
| 52 | inline double lowerRange() const {return _lowerRange;} |
| 53 | inline void getRange(double &lower,double &upper) const { lower = _lowerRange; upper = _upperRange; } |
| 54 | virtual void setCoeff(int, int, double)=0; |
| 55 | virtual double getCoeff(int, int)=0; |
| 56 | |
| 57 | protected: |
| 58 | |
| 59 | virtual double myFunction(double x) const=0; |
| 60 | void setRange(double x1,double x2) { _lowerRange=x1; _upperRange=x2; }; |
| 61 | |
| 62 | private: |
| 63 | |
| 64 | double _upperRange; |
| 65 | double _lowerRange; |
| 66 | |
| 67 | EvtItgAbsFunction( const EvtItgAbsFunction& ); // Copy Constructor |
| 68 | EvtItgAbsFunction& operator= ( const EvtItgAbsFunction& ); // Assignment op |
| 69 | |
| 70 | }; |
| 71 | |
| 72 | #endif // EVTITGABSFUNCTION_HH |
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