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https://issues.apache.org/jira/browse/OPENJPA-1912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992441#comment-12992441
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Mark Struberg edited comment on OPENJPA-1912 at 2/9/11 12:11 PM:
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oops comment should have gone to OPENJPA-1933
was (Author: struberg):
omg, pretty heavy to find this issue.
The reason why it used to work in the openjpa-persistence-jdbc test was due to
the old persistende_1.0 schema!
And in my regression test (as in my real world project) I use the version="2.0"
of the persistence.xml schema
I was able to run the regression test after adding
<property name="openjpa.Compatibility"
value="IgnoreDetachedStateFieldForProxySerialization=true"/>
Conclusio: there is a fish in our deserialisation logic because the
DetachedStateManager doesn't create proxies for Collections, Maps, etc
anymore...
Question: which side effects does using
IgnoreDetachedStateFieldForProxySerialization=true have? *shudder*
> enhancer generates invalid code if fetch-groups is activated
> ------------------------------------------------------------
>
> Key: OPENJPA-1912
> URL: https://issues.apache.org/jira/browse/OPENJPA-1912
> Project: OpenJPA
> Issue Type: Bug
> Components: Enhance
> Affects Versions: 2.0.0, 2.0.1, 2.1.0
> Reporter: Mark Struberg
> Priority: Critical
> Attachments: OPENJPA-1912-enhancer.patch,
> OPENJPA-1912-fix-wo_cleanup-2.patch, OPENJPA-1912-fix-wo_cleanup.patch,
> OPENJPA-1912-mdd.diff.txt, OPENJPA-1912-test.patch
>
>
> If openjpa.DetachState =fetch-groups is used, the enhancer will add a
> 'implements Externalizable' + writeExternal + readExternal.
> The problem is, that writeExternal and readExternal will also try to
> externalize the private members of any given superclass. Thus we get a
> runtime Exception that we are not allowed to access those fields.
> Example:
> @Entity
> public abstract class AbstractGroup {
> ...
> @Temporal(TemporalType.TIMESTAMP)
> @TrackChanges
> private Date applicationBegin;
> ...
> }
> and
> @Entity
> public class Group extends AbstractGroup {
> ...
> }
> will result in the following code (decompiled with jad):
> public void writeExternal(ObjectOutput objectoutput)
> throws IOException
> {
> pcWriteUnmanaged(objectoutput);
> if(pcStateManager != null)
> {
> if(pcStateManager.writeDetached(objectoutput))
> return;
> } else
> {
> objectoutput.writeObject(pcGetDetachedState());
> objectoutput.writeObject(null);
> }
> objectoutput.writeObject(applicationBegin);
> objectoutput.writeObject(applicationEnd);
> objectoutput.writeObject(applicationLocked);
> objectoutput.writeObject(approvalRequired);
> ...
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