FMLIndexedMessageToMessageCodec.java 文件源码

@Override
protected final void decode(ChannelHandlerContext ctx, FMLProxyPacket msg, List<Object> out) throws Exception
{
    testMessageValidity(msg);
    ByteBuf payload = msg.payload().duplicate();
    if (payload.readableBytes() < 1)
    {
        FMLLog.log(Level.ERROR, "The FMLIndexedCodec has received an empty buffer on channel %s, likely a result of a LAN server issue. Pipeline parts : %s", ctx.channel().attr(NetworkRegistry.FML_CHANNEL), ctx.pipeline().toString());
    }
    byte discriminator = payload.readByte();
    Class<? extends A> clazz = discriminators.get(discriminator);
    if(clazz == null)
    {
        throw new NullPointerException("Undefined message for discriminator " + discriminator + " in channel " + msg.channel());
    }
    A newMsg = clazz.newInstance();
    ctx.attr(INBOUNDPACKETTRACKER).get().set(new WeakReference<FMLProxyPacket>(msg));
    decodeInto(ctx, payload.slice(), newMsg);
    out.add(newMsg);
}