// src/backend/policy_parameters.hh - Copyright 2005, 2006, University
//               of Padova, dept. of Pure and Applied
//               Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

#ifndef POLICY_PARAMETERS_HH
#define POLICY_PARAMETERS_HH 1

#include "config.h"

#include <map>
#include <stdexcept>

#include "glibmm/ustring.h"

namespace sgpem
{
	class PolicyParametersException : public std::runtime_error {
	public:
		PolicyParametersException(char* msg): std::runtime_error(msg) {}
	};
	class PolicyParameters;
	
	
  /**	\brief 
		Represents all configurable parameters of a single scheduling algorithm. Is is used by the user
  		interface: it's useful to know which parameters the user will be asked for.		  
  		Each Policy object owns only one instance of this class. 
  */			   
	class SG_DLLEXPORT PolicyParameters 
	{
	public:
		template<typename T>
		class Parameter;
	
				
		//methods to CREATE PARAMETERS
		void	register_int(Glib::ustring name,const int& lower_bound, const int& upper_bound, const bool& required, const int& default_value = 0);
		void	register_float(Glib::ustring name,const float& lower_bound, const float& upper_bound, const bool& required, const float& default_value = 0.0f);
		void	register_string(Glib::ustring name, const bool& required, const Glib::ustring& default_value = "");
		
		void	clear();
		
		//methods to RETRIEVE CREATED PARAMETERS
		std::map<Glib::ustring, Parameter<int> > 			get_registered_int_parameters() const;
		std::map<Glib::ustring, Parameter<float> > 			get_registered_float_parameters() const;
		std::map<Glib::ustring, Parameter<Glib::ustring> > 	get_registered_string_parameters() const;
		
		//methods to SET the VALUE of PARAMETERS
		
		bool 	set_int(Glib::ustring name, const int& value);
		bool 	set_float(Glib::ustring name, const float& value);
		bool 	set_string(Glib::ustring name, const Glib::ustring& value);
		
		//methods to GET the VALUE of PARAMETERS
		
		int					get_int(Glib::ustring name) const;
		float 				get_float(Glib::ustring name) const;
		Glib::ustring 		get_string(Glib::ustring name) const;

		
		
	private:
		std::map<Glib::ustring, Parameter<int> >			int_map;
		std::map<Glib::ustring, Parameter<float> >			float_map;
		std::map<Glib::ustring, Parameter<Glib::ustring> >	string_map;
	};
	
	
	/**
		This class is useful only to store informations about each parameter. No checks 
		on the values entered are done.
	*/			   
	template<typename T>
	class PolicyParameters::Parameter
	{
		public:
			Parameter(Glib::ustring name, const T& value, const T& lower_bound, const T& upper_bound, const bool& required,  const T& default_value = 0);
			Glib::ustring	get_name() const;
			T				get_lower_bound() const;
			T				get_upper_bound() const;
			bool			is_required() const;
			T				get_default() const;
			T				get_value() const;
		
			void 			set_value(const T&);
		
		private:
			Glib::ustring	_name;
			T				_value;
			T				_lower_bound;
			T				_upper_bound;		
			bool			_is_required;
			T				_default;
	};
	
	
}//~ namespace sgpem

#include "../templates/parameter.tcc"

#endif