Hi, The cited example [1] does demonstrate an use case where a second-level derived identity I2 (PageId) is composed of another identity I1 (BookId) which itself is a non-primitive or non-String composite key derived from another entity (Library).
If you have access to OpenJPA source tree then you can find the test cases of similar usage with Page/Book/Library entity classes. -- View this message in context: http://n2.nabble.com/Enterprise-JavaBeans---HowTo%3A-construct-Composite-key-using-other-composite-key--tp788926p789876.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
