I decided that it would be a valuable way to migrate existing CMP2.1 EJBs to OpenJPA, as this should also work
OUTSIDE a Java EE 5 (and therefore inside EJB2.1) container. The problem I see is that I have to provide the OpenJPA
mappings as Java5 annotations, and EJB2.1 projects are bound to Java 1.4 – without having annotations.
Is there a way of providing the mapping via XML-descriptor too?
Does anybody see other possible failures when running OpenJPA within a Java EE 1.4 container?