[ https://issues.apache.org/jira/browse/OPENJPA-1912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661057#comment-13661057 ]
ASF subversion and git services commented on OPENJPA-1912:
----------------------------------------------------------
Commit 1483996 from hthomann
[ https://svn.apache.org/r1483996 ]
OPENJPA-1912: Generate externalizable methods correctly for super and subclasses - back ported to 2.1.x Mark Struberg's trunk changes.
> 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
> Assignee: Michael Dick
> Priority: Critical
> Fix For: 2.2.0
>
> 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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