Re: [eclipselink-users] NullPointerException for ManyToOne ingenericEmbe

["Guy Pelletier" <guy.pelletier@xxxxxxxxxx>]

Yes, please enter a bug for this.

Thanks,
Guy

----- Original Message ----- 
From: "jml83" <jeffrey.m.leong@xxxxxxxxx>
To: <eclipselink-users@xxxxxxxxxxx>
Sent: Friday, July 17, 2009 5:01 PM
Subject: Re: [eclipselink-users] NullPointerException for ManyToOne 
ingenericEmbeddable


> Here is a paraphrase of the code:
>
> @Embeddable
> public class Value  implements Serializable {
> @ManyToOne
> private A asset;
>
> @Basic
> private double value;
> }
>
> @Entity
> @Inheritance(strategy=InheritanceStrategy.Joined)
> public Asset{
> @Id
> private String name;
> }
>
> @Entity
> public Stock extends Asset{
> private String ticker;
> }
>
> @Entity
> public ValueHolder{
> @Id
> String name;
>
> @Embedded
> private Value<Stock> value;
> }
>
> The same exact
> EntityAccessor.discoverMappedSuperclassesAndInheritanceParents() method 
> may
> not work, but wouldn't it make sense to have a similar method that 
> discovers
> the TypeVariables for Embedded classes and populates m_genericTypes?
>
>
> Guy Pelletier wrote:
> > That likely won't fix it.
> >
> > What does your embeddable mapping look like?
> >
> > Cheers,
> > Guy
> > ----- Original Message ----- 
> > From: "jml83" <jeffrey.m.leong@xxxxxxxxx>
> > To: <eclipselink-users@xxxxxxxxxxx>
> > Sent: Friday, July 17, 2009 1:12 PM
> > Subject: [eclipselink-users] NullPointerException for ManyToOne in
> > genericEmbeddable
> >
> >
> > > I get the following exception when trying to process an Embeddable with 
> > > a
> > > generic ManyToOne relationship using the built in
> > > org.eclipse.jpt.eclipselink.core.ddlgen.Main class in Eclipse Galileo:
> > >
> > > Caused by: java.lang.NullPointerException
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotatedElement.setAnnotatedElement(MetadataAnnotatedElement.java:559)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotatedElement.<init>(MetadataAnnotatedElement.java:90)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataClass.<init>(MetadataClass.java:32)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotatedElement.isEmbedded(MetadataAnnotatedElement.java:359)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.buildAccessor(ClassAccessor.java:261)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processAccessorFields(ClassAccessor.java:577)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.addAccessors(ClassAccessor.java:239)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processAccessors(ClassAccessor.java:633)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EmbeddableAccessor.process(EmbeddableAccessor.java:85)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.processEmbeddableClass(EmbeddedAccessor.java:345)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.EmbeddedAccessor.process(EmbeddedAccessor.java:134)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor.processAccessors(MetadataDescriptor.java:1082)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processAccessors(ClassAccessor.java:636)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processAccessors(EntityAccessor.java:611)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.process(EntityAccessor.java:530)
> > > at
> > > org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:446)
> > > at
> > > org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:303)
> > > at
> > > org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:838)
> > > ... 8 more
> > >
> > > I took the liberty of debugging the stack a lil bit, and it seems the
> > > m_rawClass doesn't get set properly in the method
> > > MetadataAnnotatedElement.getRawClass() because the m_genericTypes
> > > variable
> > > never gets populated for EmbeddableAccessor.
> > >
> > > It does however get populated properly for Entites by the
> > > EntityAccessor.discoverMappedSuperclassesAndInheritanceParents() method.
> > > At
> > > the risk of sounding presumptuous, it would seem calling a similar 
> > > method
> > > in
> > > the process() method of the EmbeddableAccessor might fix this...
> > > Apologies
> > > for the amateur diagnosis, but this has been really jamming up my work.
> > >
> > > Could this be fixed for generics on Embeddables?
> > >
> > > p.s. should I be sending this to the DEV list?
> > >
> > > --
> > > View this message in context:
> > > http://www.nabble.com/NullPointerException-for-ManyToOne-in-generic-Embeddable-tp24535000p24535000.html
> > > Sent from the EclipseLink - Users mailing list archive at Nabble.com.
> > >
> > > _______________________________________________
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> > > eclipselink-users@xxxxxxxxxxx
> > > https://dev.eclipse.org/mailman/listinfo/eclipselink-users
> >
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> > eclipselink-users@xxxxxxxxxxx
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>
> --
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> Sent from the EclipseLink - Users mailing list archive at Nabble.com.
>
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