How to test whether lazy loaded JPA collection is initialized?

Question

I have a service that gets a JPA entity from outside code. In this service I would like to iterate over a lazily loaded collection that is an attribute of this entity to see

Answer 1

For eclipselink, users cast the collection you are trying to access to an org.eclipse.persistence.indirection.IndirectList, and then call its isInstantiated() method. The following link has more information:

http://www.eclipse.org/eclipselink/api/1.1/org/eclipse/persistence/indirection/IndirectList.html#isInstantiated.