EvtItgAbsFunction.hh

Go to the documentation of this file.

//--------------------------------------------------------------------------
//
//
// 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