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https://issues.apache.org/jira/browse/OPENJPA-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12596698#action_12596698
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Michael Vorburger commented on OPENJPA-602:
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-----Original Message-----
From: Michael Vorburger [mailto:[EMAIL PROTECTED]
Sent: mercredi, 30. avril 2008 17:07
To: [EMAIL PROTECTED]; dev@openjpa.apache.org
Subject: NPE at RelationToManyInverseKeyFieldStrategy when using mappedBy
inverse
Hello,
I'm running into an NPE in RelationToManyInverseKeyFieldStrategy
(copy/pasted below) when using an OneToMany inverse relation with mappedBy and
InheritanceType.TABLE_PER_CLASS in 1.1.0-SNAPSHOT...
Test summary: A common abstract superclass Translatable which has a
@OneToManySet<Translation>, and many subclasses of that like e.g. a
SomethingTranslatable, and many more. The idea is that mapping should lead to
a Translation table holding the items for SomethingTranslatable and all other
superclasses. Then SomethingTranslatable and many other tables (no physical
Translatable table). There shouldn't be a join table for each
SomethingTranslatable, as it's a OneToManySet, it doesn't make sense, so the
owning side is a @ManyToOne in Translation back to Translatable. Granted a
physical FK will not be possible in such a schema - accepted, but it should
still be possible to map this? It works until I use @Inheritance(strategy =
InheritanceType.TABLE_PER_CLASS) on Translatable, with it - boum, NPE.
> NullPointerException at
> org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrategy.map
> -----------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-602
> URL: https://issues.apache.org/jira/browse/OPENJPA-602
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc
> Affects Versions: 1.1.0
> Reporter: Michael Vorburger
> Priority: Minor
> Attachments: FullStackTrace-OPENJPA-602.txt, OneToMany-test.zip
>
>
> The example I'll attach crashes with an NPE when running the mappingtool.
> Caused by: java.lang.NullPointerException
> at
> org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrategy.map(RelationToManyInverseKeyFieldStrategy.java:136)
> at
> org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy.map(RelationCollectionInverseKeyFieldStrategy.java:95)
> at
> org.apache.openjpa.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:120)
> at
> org.apache.openjpa.jdbc.meta.RuntimeStrategyInstaller.installStrategy(RuntimeStrategyInstaller.java:80)
> at
> org.apache.openjpa.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.java:438)
> at
> org.apache.openjpa.jdbc.meta.FieldMapping.resolve(FieldMapping.java:403)
> at
> org.apache.openjpa.jdbc.meta.ClassMapping.resolveMapping(ClassMapping.java:812)
> The goal of this JIRA is not (neccessarily) to support the kind of mapping
> that would be required for this (which may be hard), but to at least print a
> clear error and not an NPE...
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