JPA 2.0 specifies canonical memtamodel classes for persistent entities. Currently this generation process is uncontrolled.
Every time the compiler is invoked with
$ java -processor openjpa.AnnotationProcessor6 my.PObject
we generate my.PObject_.java.
We should be able to control this process. In fact, current limitation of being non-selective stops us from activating the service discovery mechanism.
One suggestion (by Jeremy) is to add a annotation attribute in the @Entity class.
Another suggestion (by Albert) is to bring this generation process closer to PCEnhancer.
Can we also make use of the has @Generated annotation timestamp in PObject_.java to make some decisions?