ith no data. NOTE: this may be useful
 if for some reason the DataHandler that is passed in
 throws IOExceptions when this method attempts to
 access its InputStream. It will allow the caller to
 retrieve a reference to the bean if it can be
 instantiated.
 <p>
 If the bean does NOT implement the CommandObject interface,
 this method will check if it implements the
 java.io.Externalizable interface. If it does, the bean's
 readExternal method will be called if an InputStream
 can be acquired from the DataHa