UnambiguousConverterMap.h

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/* ============================================================
 *
 * This file is part of the RSB project
 *
 * Copyright (C) 2011 Jan Moringen <jmoringe@techfak.uni-bielefeld.de>
 *
 * This file may be licensed under the terms of the
 * GNU Lesser General Public License Version 3 (the ``LGPL''),
 * or (at your option) any later version.
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the LGPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the LGPL along with this
 * program. If not, go to http://www.gnu.org/licenses/lgpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The development of this software was supported by:
 *   CoR-Lab, Research Institute for Cognition and Robotics
 *     Bielefeld University
 *
 * ============================================================ */

#pragma once

#include <stdexcept>
#include <map>
#include <string>

#include <boost/format.hpp>

#include <rsc/runtime/NoSuchObject.h>
#include <rsc/runtime/Printable.h>

#include "ConverterSelectionStrategy.h"

namespace rsb {
namespace converter {

template<typename WireType>
class UnambiguousConverterMap: public ConverterSelectionStrategy<WireType> {
public:
    typedef typename ConverterSelectionStrategy<WireType>::ConverterPtr ConverterPtr;

    ConverterPtr getConverter(const std::string& key) const {
        typename ConverterMap::const_iterator it = this->converters.find(key);
        if (it == this->converters.end()) {
            throw rsc::runtime::NoSuchObject(
                    boost::str(
                            boost::format(
                                    "No converter for wire-schema or data-type `%1%'.\nAvailable converters: %2%")
                                    % key % this->converters));
        }
        return it->second;
    }

    void addConverter(const std::string& key, ConverterPtr converter) {
        // TODO use RSB exception class, but do we have one for invalid argument?
        if (this->converters.find(key) != this->converters.end()) {
            throw std::invalid_argument(
                    boost::str(
                            boost::format(
                                    "A converter is already stored for the key `%1%'")
                                    % key));
        }
        this->converters.insert(std::make_pair(key, converter));
    }
private:
    typedef std::map<std::string, ConverterPtr> ConverterMap;

    ConverterMap converters;

    std::string getClassName() const {
        return "UnambiguousConverterMap";
    }

    void printContents(std::ostream& stream) const {
        stream << "converters = " << this->converters;
    }
};

}
}