EasyPacket.java

    public static <T extends IModPacket> void registerPacket(SimpleChannel channel, int discriminator, PacketHandler<T> handler)
    {        
        channel.registerMessage(discriminator, handler.getPacketClass(), handler::encode, handler::decode, handler::handle);
    }
    
    public static abstract class PacketHandler<T extends IModPacket>
    {
        private final Class<T> tClass;

        protected PacketHandler(Class<T> tClass)
        {
            this.tClass = tClass;
        }

        public Class<T> getPacketClass()
        {
            return tClass;
        }

        public final void encode(T packet, PacketBuffer buffer)
        {
            packet.encode(buffer);
        }
        
        public final T decode(PacketBuffer buffer)
        {
            T obj;
            try
            {
                obj = tClass.newInstance();
            }
            catch (InstantiationException | IllegalAccessException e)
            {
                throw new RuntimeException("Problem instantiating packet", e);
            }
            obj.decode(buffer);
            return obj;
        }
        
        public final void handle(T packet, Supplier<NetworkEvent.Context> context)
        {
            handleInternal(packet, context);
            context.get().setPacketHandled(true);
        }

        public abstract void handleInternal(T packet, Supplier<NetworkEvent.Context> context);
    }
    
    public interface IModPacket
    {
        void encode(PacketBuffer buffer);
        void decode(PacketBuffer buffer);
    }