Not unless you can deserialize the object using a SQLCLR object to review its properties, which I highly doubt. There is no native Java capability in SQL Server that would allow you to inspect that BLOB inside the database as if it were an object again, that I know of. You might be able to shoehorn the instantiation of a Java object into the scope of a SQLCLR object somehow by making an external call. Maybe you could have a SQLCLR object pass the BLOB to an external web service or executable for deserialization and inspection, but that would be terribly slow I would venture, if its even technically feasible. What you might want to start doing is storing the parent-child indicators in a separate column(s) next to the BLOB but you still have the problem of inspecting the existing data to initialize the new column(s).
There are no special teachers of virtue, because virtue is taught by the whole community. --Plato