/** {@inheritDoc} */
@Nullable
@Override
public Object decode(GridNioSession ses, ByteBuffer buf) throws IOException, GridException {
GridTcpCommunicationMessageAdapter msg = ses.removeMeta(MSG_META_KEY);
UUID nodeId = ses.meta(GridNioServer.DIFF_VER_NODE_ID_META_KEY);
if (msg == null && buf.hasRemaining())
msg = GridTcpCommunicationMessageFactory.create(buf.get());
boolean finished = false;
if (buf.hasRemaining()) finished = msgReader.read(nodeId, msg, buf);
if (finished) return msg;
else {
ses.addMeta(MSG_META_KEY, msg);
return null;
}
}