JDO 3 now has the ability to declare meta-data programmatically. Part of this feature is the ability to ask the PersistenceManagerFactory via the method getMetadata(java.lang.String) for the meta-data of one single class. But there is no way to list all known classes.
I therefore kindly ask for a new method in PersistenceManagerFactory like this:
Btw., this is Andy's suggestion posted here: http://www.datanucleus.org/servlet/forum/viewthread_thread,6379#33224
I'd greatly appreciate, if this method became a part of JDO 3.1.
Edit 1: I just saw the various overloaded methods getManagedObjects(...) in PersistenceManager - maybe the alternative method name "getManagedClasses()" would be more consistent?