Inheritance is never truly with entity beans, entity beans are not meant to be domain objects. They are meant to be components. The EJB Clients can't down/up cast an entity beans EJBObject stub to a parent or subclass.
Albert Pi Corp IS System Delivery 516-803-3762 >>> "J. Matthew Pryor" <[EMAIL PROTECTED]> 07/29/02 09:46PM >>> Hi, I can think of a whole lot of reasons why I can't do this, but lets say I want to try. Does anyone have any thoughts on how to get CMP EJBs to participate in Polymorphic relationships. Lets say I have ContainerBean & ContaineeBean I have a relationship based on the fact that a Containee is contained in zero or one containers, but a container can contain 0..N Containees & Containers (i.e. a hierarchy) So the "containee" role may point to zero or more ContainerBeans or ContaineeBeans (or a combination of both which is actually what I want) Even if a have ContainerBean extend from ContaineeBean, I am not sure I can make this work. My guess is I have to spoof it by actually specifying to different relationships and then writing code to "merge" them at runtime. I have thought of ways I might use XDoclet or other template systems to help in generating the wrapper code, making them essentially bean managed relationships This is probably far too OO to try & do with EJB but I am interested in people's thoughts on the topic and possibly any other discussions people know of I imagine it is possible to do my simple example some other way to avoid the problem, but lets say that I really want the feature; mostly I want it to support code reuse & EJB implementation inheritance. Thanks, Matthew =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". ==========================================================================To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
