yuriks

// PacketFactory.cpp

template<class T> Packet *makePacket()
{
    return static_cast<Packet *>(new T());
}

PacketFactory::PacketFactory()
{
    // Register packet types here
    idMap[PacketFactory::PACKET_ACKNOWLEDGE] = makePacket<PacketAcknowledge>;
}

Packet *PacketFactory::createFromId(PacketIds id)
{
    IdMapType::const_iterator mapping = idMap.find(id);

    if (mapping == idMap.end())
        throw UnknownPacketException();

    return mapping->second();
}

PacketFactory globalPacketFactory;