collection « jdo « Java Enterprise Q&A

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1. Problem persisting collection of interfaces in JDO/Datanucleus. "unable to assign an object of type.."    stackoverflow.com

I am getting below error whilst trying to persist an object that has a collection of interfaces which I want to hold a couple of different types of objects. Seems to ...

2. JDO best practice: Store objects as a collection under their parent or independently?    stackoverflow.com

I have a User and Transaction class Each Transaction logically belongs to a User. But I may need to query for some subset of Transactions (ex: return all Transactions for User A ...