Actionscript 3 :: AIR ReadObject() From Socket - Check All Data Has Been Received?

If you write a simple object to a socket:

var o:Object = new Object();
o.type = e.type;
o.params = e.params;
_socket.writeObject(o);
_socket.flush();

Then on the client do you simply use:

private function onData(e:ProgressEvent):void
{
var o:Object = _clientSocket.readObject();
}

Or do you have to implement some way of checking all of the data has been received recieved before calling .readObject()