Hi! I'm trying to use inheritance within entity beans. The superclass defines a set of CMR methods which should be used in the subclass without the need to declare them in the subclasses again. 1xN relations don't make any trouble i think, but NxM relations will do.
To make my problem a little more concrete: I have a entity bean called "DeviceBean" and to subclasses "FTPDeviceBean" and "FTAMDeviceBean". Each subclass has a set of additional attributes. All entity beans are mapped in different tables. All entries have a unique id (Integer) which is unique within all device tables. Next, the "DeviceBean" defines a bidirectional relation to a "PollingCycleBean" which will be mapped in a relation table. (I hope may bad "ASCII arts" makes my problem clear :) DeviceBean n<------------------>m PolingCycleBean |-- FTPDeviceBean -------------------^ should also use relation |-- FTAMDeviceBean -----------------^ should also use relation Relation table: ______________________ |device_id (pk)| pc_id (pk)| ______________________ To use the relation in my subclasses I have to declare the relation in the ejb-jar.xml for each subclass with a unique name. But next step will make trouble i think. Associating a FTP-device with a new polling cycle will add an entry to the relation table. But can the container make an inverse lookup and return the associated devices (FTP- and FTAM-devices) which are stored in different tables ? Can I use bidirectional NxM CMR in subclasses with JBoss 3.2 ? Thanks a lot for bringing some more light in my understanding of the abilities of CMR. Regards, Marcel View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3842505#3842505 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3842505 ------------------------------------------------------- This SF.Net email is sponsored by BEA Weblogic Workshop FREE Java Enterprise J2EE developer tools! Get your free copy of BEA WebLogic Workshop 8.1 today. http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
