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https://issues.apache.org/jira/browse/OPENJPA-386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568728#action_12568728
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Chris Arnett commented on OPENJPA-386:
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Any updates on this? We're having the same problem. These are legacy tables
and we don't have the luxury of changing the schema. We also can't use an
EmbeddedId (which seems to work in this case) because one of the fields is
generated while the other is not (an unsupported case for EmbeddedId).
Unless this is fixed in the Feb 15th release, we'll probably have to override
WL10's JPA implementation with Hibernate (if that's even possible).
> org.apache.openjpa.meta.ClassMetaData.validateAppIdClass() does not take
> @MappedSuperclass into account
> -------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-386
> URL: https://issues.apache.org/jira/browse/OPENJPA-386
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 0.9.7, 1.0.0
> Environment: BEA WebLogic 10.0 under Windows XP SP1
> Reporter: Matthew L. Schwickerath
>
> We have a @MappedSuperclass that is the base for all of our entity bean
> classes. This class contains the @Version (and @Column for the version
> field) that all of our entity beans use. But, in
> ClassMetaData.validateAppIdClass(), if an entity bean class has a superclass,
> and the entity bean has an @IdClass, it expects that superclass to have an
> @IdClass also. All of our entity beans have an @IdClass (even if they only
> have a single part key), but our @MappedSuperclass does not have an @IdClass.
> This scenario works under JBoss 4.2.0 and Sun AS 9, but produces a
> NullPointerException in OpenJPA at:
> if (_super != null) {
> // concrete superclass oids must match or be parent of ours
> ClassMetaData sup = getPCSuperclassMetaData();
> if (!sup.getObjectIdType().isAssignableFrom(_objectId)) // <---
> NullPointerException here
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