[eclipselink-users] Embeddable Id class and GeneratedValue annotation

[Christopher Schmidt <fakod666@xxxxxxxxxxxxxx>]

Hi James,
since I am using it like that:
public class User {  @EmbeddedId  public UserId user = new UserId();}

It works fine, thanks.

And BTW the SequenceGenerator annotation is ignored... A new sequence
is generated, but with name "XXX" not "XXXseq"?

Christopher

On Wed, Mar 2, 2011 at 4:51 PM, James Sutherland <jamesssss@xxxxxxxxx> wrote:

What object are you persisting?  Does it have a UserId or is it null?  You
must initialize it to have a UserId, it can't be null.

Also log a bug, a null pointer should not be occurring.


Christopher Schmidt-5 wrote:
>
> Hi, where do I have to place the @GeneratedValue Annotation when I use a
> EmbeddedId class.
>
> Like this?
>
> @Embeddable
> @SequenceGenerator(name = "XXX", sequenceName = "XXXseq")
> class UserId implements Serializable {
>
>    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "XXX")
>    BigInteger id;
> }
>
> Does not work, thats why I'm asking ;-) I'm getting a NPE (think field id
> is
> null):
>
> org.specs.runner.UserError: java.lang.NullPointerException: null
> at
> org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:92)
> at
> org.eclipse.persistence.internal.descriptors.MethodAttributeAccessor.getAttributeValueFromObject(MethodAttributeAccessor.java:61)
> at
> org.eclipse.persistence.mappings.DatabaseMapping.getAttributeValueFromObject(DatabaseMapping.java:523)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.getBaseValueForField(ObjectBuilder.java:2484)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.assignSequenceNumber(ObjectBuilder.java:284)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.assignSequenceNumber(UnitOfWorkImpl.java:454)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNotRegisteredNewObjectForPersist(UnitOfWorkImpl.java:4190)
> at
> org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.registerNotRegisteredNewObjectForPersist(RepeatableWriteUnitOfWork.java:493)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:4135)
> at
> org.eclipse.persistence.internal.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:406)
> at
> org.jpaextension.manager.EntityManagerWrapper$class.persistAndFlush(EntityManagerWrapper.scala:114)
> at
> org.jpaextension.test.OrgStructEmbeddedIdTest.persistAndFlush(OrgStructEmbeddedIdTest.scala:9)
>
> What is wrong?
>
> using EclipseLink 2.2.0
>
> --
> Christopher
> twitter: @fakod
> blog: http://blog.fakod.eu
>
>
>


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