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EvtItgAbsFunction.hh
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EvtItgAbsFunction.hh
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//--------------------------------------------------------------------------
//
//
// Copyright Information: See EvtGen/COPYRIGHT
//
// Environment:
// This software is part of the EvtGen package developed jointly
// for the BaBar and CLEO collaborations. If you use all or part
// of it, please give an appropriate acknowledgement.
//
// Module: EvtItgAbsFunction.hh
//
// Description:
// Abstraction of a generic function for use in integration methods elsewhere
// in this package. (Stolen and modified from the BaBar IntegrationUtils package
// - author: Phil Strother).
//
// Modification history:
//
// Jane Tinslay March 21, 2001 Module adapted for use in
// EvtGen
//
//------------------------------------------------------------------------
#ifndef EVTITGABSFUNCTION_HH
#define EVTITGABSFUNCTION_HH
//-------------
// C Headers --
//-------------
extern "C" {
}
class EvtItgAbsFunction {
public:
// Constructors
EvtItgAbsFunction(double lowerRange, double upperRange);
// Destructor
virtual ~EvtItgAbsFunction( );
virtual double value( double x) const;
virtual double operator()(double x) const;
// Selectors (const)
inline double upperRange() const {return _upperRange;}
inline double lowerRange() const {return _lowerRange;}
inline void getRange(double &lower,double &upper) const { lower = _lowerRange; upper = _upperRange; }
virtual void setCoeff(int, int, double)=0;
virtual double getCoeff(int, int)=0;
protected:
virtual double myFunction(double x) const=0;
void setRange(double x1,double x2) { _lowerRange=x1; _upperRange=x2; };
private:
double _upperRange;
double _lowerRange;
EvtItgAbsFunction( const EvtItgAbsFunction& ); // Copy Constructor
EvtItgAbsFunction& operator= ( const EvtItgAbsFunction& ); // Assignment op
};
#endif // EVTITGABSFUNCTION_HH

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