From: Mitesh Meswani <Mitesh.Meswani_at_Sun.COM>
Date: Thu, 10 Jul 2008 19:10:01 -0700

Toplink stores descriptors inside a map in Project
(http://fisheye5.cenqua.com/browse/~raw,r=1.11/glassfish/entity-persistence/src/java/oracle/toplink/essentials/sessions/Project.java).
The map is from .class object to actual descriptors. It should be easy
to debug this issue with sources. You can get source bundles from here
(https://glassfish.dev.java.net/downloads/persistence/JavaPersistence.html)