[jboss-user] [EJB 3.0] - Re: help composite keys

anonymous wrote : | This is Database Theory but what can i do to this in EJB3? | This not about database theory nor about EJB 3 but about your data model. I think you should focus first on what you actually want to map. I assume the follwing is true: 1.) One Route consists of many ports. 2.) One port can be a destionation of many routes. 3.) Port and route are mapped correctly (e.g. have @Id, overriden equals(), hashCode() etc.) Questions: 1.) Is a port unique on each route? (Can a single port be twice on the iternary of a route?) 2.) What is the distance for? The distance of the total route? Or between two ports? Regards Felix View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4042998#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...