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// config_data.tcc
// marvin - programme du robot 2006. {{{
//
// Copyright (C) 2006 Nicolas Schodet
//
// Robot APB Team/Efrei 2006.
//        Web: http://assos.efrei.fr/robot/
//      Email: robot AT efrei DOT fr
//
// This program 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.
// 
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// }}}

#include <stdexcept>

/// R�cup�re une valeur de configuration, fonction g�n�rique.
template<typename T>
const T &
ConfigData::get (const std::string &id) const
{
    const any &a = get (id);
    const T *v = any_cast<T> (&a);
    if (!v)
	throw std::runtime_error (id + ": config item with bad type");
    return *v;
}

/// R�cup�re une valeur de configuration, fonction g�n�rique avec valeur
/// par d�faut. Cette fonction ne renvoie d'exception que si il y a un
/// probl�me de type et non de valeur non existante.
template<typename T>
const T &
ConfigData::get (const std::string &id, const T &defaut) const
{
    // Construct an empty any
    any empty;
    // Get the value with an empty one by default
    const any &a = get (id, empty);
    // Empty value returned, not found
    if (a.empty ())
	return defaut;
    const T *v = any_cast<T> (&a);
    if (!v)
	throw std::runtime_error (id + ": config item with bad type");
    return *v;
}