plugin.h

/* Copyright (c) 2013-2016, EPFL/Blue Brain Project
 *                          Raphael Dumusc <raphael.dumusc@epfl.ch>
 *                          Stefan.Eilemann@epfl.ch
 *
 * This file is part of Lunchbox <https://github.com/Eyescale/Lunchbox>
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *
 * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef LUNCHBOX_PLUGIN_H
#define LUNCHBOX_PLUGIN_H

#include <servus/uint128_t.h> // member
#include <functional>

namespace lunchbox
{
template< class T > class Plugin
{
public:
    typedef std::function< T* ( const typename T::InitDataT& )> Constructor;

    typedef std::function< bool ( const typename T::InitDataT& )> HandlesFunc;

    Plugin( const Constructor& constructor, const HandlesFunc& handles_ )
        : _constructor( constructor ), _handles( handles_ )
        , tag( servus::make_UUID( )) {}

    bool operator == ( const Plugin& rhs ) const
        { return tag == rhs.tag; }

    bool operator != ( const Plugin& rhs ) const { return !(*this == rhs); }

    T* construct( const typename T::InitDataT& data )
        { return _constructor( data ); }

    bool handles( const typename T::InitDataT& data )
        { return _handles( data ); }

private:
    Constructor _constructor;
    HandlesFunc _handles;

    // Makes Plugin comparable. See http://stackoverflow.com/questions/18665515
    servus::uint128_t tag;
};

}

#endif