JMinimizer.hh

Go to the documentation of this file.

#ifndef __JROOT__JMINIMIZER__
#define __JROOT__JMINIMIZER__
 
#include <string>
#include <istream>
#include <ostream>
 
#include "Math/MinimizerOptions.h"
 
 
/**
 * Auxiliary data structure to define ROOT minimizer.
 */
struct JMinimizer {
  /**
   * Default constructor.
   */
  JMinimizer() :
    type     ("Minuit"),
    algorithm("Migrad"),
    debug    (0)
  {
    configure();
  }
 
 
  /**
   * Configure ROOT minimizer.
   */
  void configure()
  {
    ROOT::Math::MinimizerOptions::SetDefaultMinimizer(type.c_str(), algorithm.c_str());
    ROOT::Math::MinimizerOptions::SetDefaultPrintLevel(debug);
  }
 
 
  /**
   * Stream input of ROOT minimzer.
   *
   * \param  in                      input stream
   * \param  object                  ROOT minimzer
   * \return                         input stream
   */
  friend inline std::istream& operator>>(std::istream& in, JMinimizer& object)
  {
    if (in >> object.type >> object.algorithm) {
 
      in >> object.debug;
 
      in.clear();
 
      object.configure();
    }
 
    return in;
  }
 
 
  /**
   * Stream output of ROOT minimzer.
   *
   * \param  out                     output stream
   * \param  object                  ROOT minimzer
   * \return                         output stream
   */
  friend inline std::ostream& operator<<(std::ostream& out, const JMinimizer& object)
  {
    return out << object.type << ' ' << object.algorithm;
  }
  
  std::string type;
  std::string algorithm;
  int         debug;
};
 
 
/**
 * ROOT minimizer.
 */
static JMinimizer minimizer;
 
#endif