Hi shivaken, did you read the tutorial on mapping inheritance hierarchies with OJB already? http://db.apache.org/ojb/tutorial3.html#mapping%20inheritance%20hierarchies
and in particular: http://db.apache.org/ojb/tutorial3.html#mapping%20all%20classes%20on%20the%2 0same%20table cheers, Thomas > -----Original Message----- > From: shivaken [mailto:[EMAIL PROTECTED]] > Sent: Thursday, February 20, 2003 10:33 AM > To: OJB Users List > Subject: newbie question: OJB cannot treat subclass as superclass? > > > I'm using polymorphism around my business classes in order to add new > subclasses dose not have unique attribute. > So, I want to add persistence them with OJB > and want to store in the same table. But, it seems to be difficult. > # All subclasses don't have own field. > > I created a abstract Call class, and LocalCall class as a > subclass of it. > > Then broker.store(localCall) causes > org.apache.ojb.broker.metadata.ClassNotPersistenceCapableException: > com.mydomain.LocalCall not found in OJB Repository > > I know persistent classes has to have default (no parameter) > constructor. > # They seem to be constructed with that. Then, abstract class > cannot be used > # with OJB. > > Are there any good ways? > > -- shivaken > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
