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https://issues.apache.org/jira/browse/JDO-517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12519809
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Craig Russell commented on JDO-517:
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>Why are classes annotated with @NotPersistent on fields and @Persistent on
>properties ? I would expect (from other persistence specifications) to have
>one or the other annotated.
If a class is persistence-capable, by default fields of a particular type are
persistent. Therefore, to use properties, fields must be marked not persistent.
> Annotating fields (with any annotation) implies that fields are used for
> persistence
I sure didn't read that anywhere in the specification.
>, yet then it encounters properties with more annotations.
> NPE on enhancement of classes with persistent properties
> --------------------------------------------------------
>
> Key: JDO-517
> URL: https://issues.apache.org/jira/browse/JDO-517
> Project: JDO
> Issue Type: Bug
> Components: tck2
> Affects Versions: JDO 2 maintenance release 1
> Reporter: Michelle Caisse
> Assignee: Andy Jefferson
>
> To reproduce, edit project.propeties, go to the end of the file, and edit out
> the comment and blank lines so that the classes in the companyAnnotatedPC
> package are included in the argument list to the enhancer.
> 11:39:16,031 (main) ERROR [JPOX.Enhancer] - An error was encountered reading
> the specified input files. Please consult the log for details. The following
> may help : Errors were encountered when loading the specified MetaData files
> and classes. See the nested exceptions for details
> Errors were encountered when loading the specified MetaData files and
> classes. See the nested exceptions for details
> org.jpox.exceptions.JPOXUserException: Errors were encountered when loading
> the specified MetaData files and classes. See the nested exceptions for
> details
> at
> org.jpox.metadata.MetaDataManager.initialise(MetaDataManager.java:299)
> at
> org.jpox.enhancer.JPOXEnhancer.getFileMetaDataForInput(JPOXEnhancer.java:724)
> at org.jpox.enhancer.JPOXEnhancer.main(JPOXEnhancer.java:533)
> Caused by: java.lang.NullPointerException
> at
> org.jpox.metadata.annotations.JDOAnnotationReader.processFieldAnnotations(JDOAnnotationReader.java:1594)
> at
> org.jpox.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:211)
> at
> org.jpox.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:133)
> at
> org.jpox.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:1729)
> at
> org.jpox.metadata.MetaDataManager.initialise(MetaDataManager.java:265)
> ... 2 more
> Nested Throwables StackTrace:
> java.lang.NullPointerException
> at
> org.jpox.metadata.annotations.JDOAnnotationReader.processFieldAnnotations(JDOAnnotationReader.java:1594)
> at
> org.jpox.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:211)
> at
> org.jpox.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:133)
> at
> org.jpox.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:1729)
> at
> org.jpox.metadata.MetaDataManager.initialise(MetaDataManager.java:265)
> at
> org.jpox.enhancer.JPOXEnhancer.getFileMetaDataForInput(JPOXEnhancer.java:724)
> at org.jpox.enhancer.JPOXEnhancer.main(JPOXEnhancer.java:533)
> java.lang.NullPointerException
> at
> org.jpox.metadata.annotations.JDOAnnotationReader.processFieldAnnotations(JDOAnnotationReader.java:1594)
> at
> org.jpox.metadata.annotations.AbstractAnnotationReader.getMetaDataForClass(AbstractAnnotationReader.java:211)
> at
> org.jpox.metadata.annotations.AnnotationManagerImpl.getMetaDataForClass(AnnotationManagerImpl.java:133)
> at
> org.jpox.metadata.MetaDataManager.loadAnnotationsForClass(MetaDataManager.java:1729)
> at
> org.jpox.metadata.MetaDataManager.initialise(MetaDataManager.java:265)
> at
> org.jpox.enhancer.JPOXEnhancer.getFileMetaDataForInput(JPOXEnhancer.java:724)
> at org.jpox.enhancer.JPOXEnhancer.main(JPOXEnhancer.java:533)
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