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From "Tim Kaltenbrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-602) NullPointerException at org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrategy.map
Date Wed, 04 Jun 2008 12:45:45 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602263#action_12602263
] 

Tim Kaltenbrunner commented on OPENJPA-602:
-------------------------------------------

Hi,

I have the same problem at my current project. I have an existing database structure created
with Kodo JDO. Now I want to use OpenJPA but keep the old database structure. Will someone
fix this problem or will you only throw an exception. I am also not sure if the specification
specifies that this case should be possible but JDO implementation do support it and therefore
it would be nice to have it in OpenJPA . 

Cheers Tim


> 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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