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From "Michael Dick (JIRA)" <>
Subject [jira] Commented: (OPENJPA-1933) @ElementCollection loose proxytype after serialisation
Date Wed, 23 Feb 2011 03:19:38 GMT


Michael Dick commented on OPENJPA-1933:

I took a look through the documentation, here's my take. 

If you have a persistence.xml file with version=2.0. The proxies will be removed if DetachedStateManager=true
and (IgnoreDetachedStateFieldForProxySerialization=false or is unset). Otherwise the proxies
will not be removed. 

If you have a persistence.xml file with version=1.0. The proxies should be serialized if you
call EntityManager.clear() prior to serializing. Otherwise (e.g. if you call detach() or detachAll(),
or find() ) the proxies will be removed. 

This seems to be the opposite of what you've found (but I haven't thoroughly looked at the
tests) - so you're right - we have a fish in our deserialization logic. 

This is a very confusing set of options and we should try to make it clearer in a future release,
but for now I think we've at least identified the issue. 

> @ElementCollection loose proxytype after serialisation
> ------------------------------------------------------
>                 Key: OPENJPA-1933
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 2.0.0, 2.0.1
>            Reporter: Mark Struberg
>            Priority: Critical
>             Fix For: 2.2.0
>         Attachments: OPENJPA-1933-test-2.patch, OPENJPA-1933-test.patch, openjpa-reg-tests.tar.gz
> usually an @ElementCollection field loaded from the database will be created as a$.util$.ArrayListProxy.
> After serialisation/deserialisation (with DetachedStateField=true) the List will be recreated
as standard java.util.ArrayList.
> This has the bad side effect, that any subsequent add to this ElementCollection will
not set the _dirty field in the DetachedStateManager and any changes in the ElementCollection
will not get saved to the database.

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