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// @(#)root/mathcore:$Id$
// Author: L. Moneta Fri Aug 15 2008
/**********************************************************************
* *
* Copyright (c) 2008 LCG ROOT Math Team, CERN/PH-SFT *
* *
* *
**********************************************************************/
#ifndef ROOT_Math_IOptions
#define ROOT_Math_IOptions
#include "Math/Error.h"
#include <iostream>
namespace ROOT {
namespace Math {
//_______________________________________________________________________________
/**
Generic interface for defining configuration options of a numerical algorithm
@ingroup NumAlgo
*/
class IOptions {
public:
IOptions() /* : fExtraOptions(0) */ {}
virtual ~IOptions() {}// { if (fExtraOptions) delete fExtraOptions; }
// copy the options
virtual IOptions * Clone() const = 0;
/** generic methods for retrivieng options */
/// set option value
void SetValue(const char * name, double val) { SetRealValue(name,val);}
void SetValue(const char * name, int val) { SetIntValue(name,val);}
void SetValue(const char * name, const char * val) { SetNamedValue(name,val);}
double RValue(const char * name) const {
double val = 0;
bool ret = GetRealValue(name,val);
if (!ret ) MATH_ERROR_MSGVAL("IOptions::RValue"," return 0 - real option not found",name);
return val;
}
int IValue(const char * name) const {
int val = 0;
bool ret = GetIntValue(name,val);
if (!ret ) MATH_ERROR_MSGVAL("IOptions::IValue"," return 0 - integer option not found",name);
return val;
}
std::string NamedValue(const char * name) const {
std::string val;
bool ret = GetNamedValue(name,val);
if (!ret ) MATH_ERROR_MSGVAL("IOptions::NamedValue"," return empty string - named option not found",name);
return val;
}
// generic method to retrieve a type
template <typename T>
bool GetValue(const char * name, T & t) const {
bool ret = DoGetValue(name, t);
//if (!ret ) MATH_ERROR_MSG("IOptions::GetValue","option is not existing - returns 0");
return ret;
}
// methods to be re-implemented in the derived classes
virtual bool GetRealValue(const char *, double &) const { return false; }
virtual bool GetIntValue(const char *, int &) const { return false; }
virtual bool GetNamedValue(const char *, std::string &) const { return false; }
/// method wich need to be re-implemented by the derived classes
virtual void SetRealValue(const char * , double ) {MATH_ERROR_MSG("IOptions::SetRealValue","Invalid setter method called"); }
virtual void SetIntValue(const char * , int ) {MATH_ERROR_MSG("IOptions::SetIntValue","Invalid setter method called"); }
virtual void SetNamedValue(const char * , const char * ) {MATH_ERROR_MSG("IOptions::SetNamedValue","Invalid setter method called"); }
/// print options
virtual void Print(std::ostream & = std::cout ) const {MATH_INFO_MSG("IOptions::Print","it is not implemented");}
private:
bool DoGetValue(const char *name, double &val) const { return GetRealValue(name,val); }
bool DoGetValue(const char *name, int &val) const { return GetIntValue(name,val); }
bool DoGetValue(const char *name, std::string &val) const { return GetNamedValue(name,val); }
};
} // end namespace Math
} // end namespace ROOT
#endif
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