src/MEDMEM/MEDMEM_OptionManager.hxx

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// Copyright (C) 2007-2011  CEA/DEN, EDF R&D, OPEN CASCADE
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//

#ifndef _OPTION_MANAGER_HXX
#define _OPTION_MANAGER_HXX

#include <string>
#include <map>
#include "MEDMEM_Exception.hxx"
namespace MEDMEM
{
  class OptionGeneric
  {
    //dummy method to have some polymorphism...
    virtual void dummy()=0;
  };
  
  template < class T > 
  class Option : public OptionGeneric
  {
  private:
    T * _var;
  public:
    Option( T defaut, T * var):
      _var(var)
    {
      *_var= defaut;
    }
    void setValue(T value)
    {
      *_var=value;
    }
    T getValue()
    {
      return  * _var;
    }

    //dummy method to have some polymorphism...
    void dummy(){}
  };
    
  class OptionManager
  {
  private:
    std::map< std::string, OptionGeneric* > _optionList;

  public:
  
    ~OptionManager()
    {
                        std::map< std::string, OptionGeneric*>::iterator mi;
      for(mi = _optionList.begin() ; mi != _optionList.end() ; mi++) delete (*mi).second;
    }
    
    template <class T> void  registerOption( T * var, const std::string& name, T defaut)
    {
      OptionGeneric  * newoption = new Option<T>( defaut, var);
      _optionList.insert(make_pair(name, newoption));                   
    }

    template <class T> void getOption(const std::string& name, T& var)
    {
      if(_optionList.find(name) != _optionList.end())  
                                {
                                        Option<T>* option_ptr = dynamic_cast<Option<T>*>(_optionList.find(name)->second);
                                        var= option_ptr->getValue();
                                }
                        else throw MEDEXCEPTION 
                                ("Option is not listed, please register the option before using the getOption command");
    }
                
    template <class T> void setOption(const std::string& name, T value)
    {
      if(_optionList.find(name) != _optionList.end())
                                {
                                        Option<T>* option_ptr = dynamic_cast<Option<T>*>(_optionList.find(name)->second);
                                        if (option_ptr != 0 )
                                                option_ptr->setValue(value);
                                        else throw MEDEXCEPTION ("Error setOption: Option is registered with a different type");
                                }
      else throw MEDEXCEPTION 
                                ("Option is not listed, please register the option before using the setOption command");
    }
    
    void setOption(const std::string& name, int value)
    {
      if(_optionList.find(name) != _optionList.end())
                                {
                                        Option<double>* option_double_ptr = dynamic_cast<Option<double>*> (_optionList.find(name)->second);
                                        if (option_double_ptr!=0)
                                                setOption(name,(double) value);
                                        else
                                                {
                                                        Option<int>* option_ptr =dynamic_cast<Option<int>*>(_optionList.find(name)->second);
                                                        if (option_ptr != 0 )
                                                                option_ptr->setValue(value);
                                                        else throw MEDEXCEPTION ("Error setOption: Option is registered with a different type");
                                                }
                                }
      else throw MEDEXCEPTION 
                                ("Option is not listed, please register the option before using the setOption command");
    }
    
  };
}

#endif