coordinate.h

/*
 * Copyright © 2012-2013 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by: Thomas Voß <thomas.voss@canonical.com>
 */
#ifndef LOCATION_SERVICE_COM_UBUNTU_LOCATION_WGS84_COORDINATE_H_
#define LOCATION_SERVICE_COM_UBUNTU_LOCATION_WGS84_COORDINATE_H_

#include "units.h"

#include <ostream>

namespace com
{
    namespace ubuntu
    {
        namespace location
        {
            namespace wgs84
            {
                template<typename Coordinate>
                struct CoordinateTraits
                {
                    static void check_and_throw_if_invalid(const typename Coordinate::Quantity& coordinate)
                    {
                    }
                };

                template<typename Tag, typename UnitType>
                class Coordinate
                {
                public:
                    typedef UnitType Unit;
                    typedef units::Quantity<Unit> Quantity;

                    explicit Coordinate(const Quantity& value = Quantity())
                        : value(value)
                    {
                        CoordinateTraits<Coordinate<Tag,UnitType>>::check_and_throw_if_invalid(value);
                    }

                    bool operator==(const Coordinate<Tag,UnitType>& rhs) const
                    {
                        return value == rhs.value;
                    }

                    bool operator!=(const Coordinate<Tag,UnitType>& rhs) const
                    {
                        return value != rhs.value;
                    }

                    Quantity value;
                };

                template<typename T, typename U>
                Coordinate<T,U> operator-(const Coordinate<T,U>& lhs, const Coordinate<T,U>& rhs)
                {
                    return Coordinate<T,U> {rhs.value - lhs.value};
                }

                template<typename T, typename U>
                std::ostream& operator<<(std::ostream& out, const Coordinate<T,U>& coord)
                {
                    out << "Coordinate(" << coord.value << ")";
                    return out;
                }
            }
        }
    }
}
#endif // LOCATION_SERVICE_COM_UBUNTU_LOCATION_WGS84_COORDINATE_H_