mapnik/include/params.hpp

/*****************************************************************************
 * 
 * This file is part of Mapnik (c++ mapping toolkit)
 *
 * Copyright (C) 2006 Artem Pavlenko
 *
 * 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, or (at your option) any later version.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *****************************************************************************/
//$Id: params.hpp 39 2005-04-10 20:39:53Z pavlenko $

#ifndef PARAMS_HPP
#define PARAMS_HPP

#include <map>
#include <boost/serialization/split_member.hpp>
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/nvp.hpp>
#include <boost/serialization/utility.hpp>
#include <boost/serialization/vector.hpp>
#include <boost/serialization/map.hpp>
#include <boost/serialization/string.hpp>
#include <boost/serialization/level.hpp>
#include <boost/serialization/tracking.hpp>
#include <boost/serialization/base_object.hpp>

namespace mapnik
{

    typedef std::pair<const std::string,std::string> parameter;
    typedef std::map<const std::string,std::string> param_map;

    class parameters : public param_map
    {
        friend class boost::serialization::access;
        
        template <typename Archive>
        void save(Archive & ar, const unsigned int /*version*/) const
        {
            const size_t size = param_map::size();
            ar & boost::serialization::make_nvp("count",size);
            param_map::const_iterator itr;
            for (itr=param_map::begin();itr!=param_map::end();++itr)
            {
                ar & boost::serialization::make_nvp("name",itr->first);
                ar & boost::serialization::make_nvp("value",itr->second);
            }
        }
	
        template <typename Archive>
        void load(Archive & ar, const unsigned int /*version*/)
        {	    
            size_t size;
            ar & boost::serialization::make_nvp("size",size);
            for (size_t i=0;i<size;++i)
            {
                std::string name;
                std::string value;
                ar & boost::serialization::make_nvp("name",name);
                ar & boost::serialization::make_nvp("value",value);
                param_map::insert(make_pair(name,value));
            }
        }
        BOOST_SERIALIZATION_SPLIT_MEMBER()
     public:

        parameters() {}
        const std::string get(std::string const& key) const
        {
            param_map::const_iterator itr=find(key);
            if (itr != end())
            {
                return itr->second;
            }
            return std::string();
        }
    };
}

BOOST_CLASS_IMPLEMENTATION(mapnik::parameter, boost::serialization::object_serializable)
BOOST_CLASS_TRACKING(mapnik::parameter, boost::serialization::track_never)

BOOST_CLASS_IMPLEMENTATION(mapnik::parameters, boost::serialization::object_serializable)
BOOST_CLASS_TRACKING(mapnik::parameters, boost::serialization::track_never)

#endif //PARAMS_HPP