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Re: [eclipselink-users] Exceptions when using generics (was Upgrade from 1.1.0-M5 to 2.0.2)

Hi, I could find no relationship to the MyClass entity in the MyGeneric mappedSuperclass.
   If MyClass would actually be MyField - then the code should validate ok.
Could you supply the code for the MyField class (F in this case should be a concrete entity subclass in your client code). Normally relationships out of MappedSuperclasses must be only to entities.

For example I get the following expected exception when i target a MappedSuperclass as the target of a OneToOne

Internal Exception: Exception [EclipseLink-7250] (Eclipse Persistence Services - org.eclipse.persistence.exceptions.ValidationException Exception Description: [class org.eclipse.persistence.example.dataparallel.model.ScalarProcessingUnit] uses a non-entity [class org.eclipse.persistence.example.dataparallel.model.ProcessingUnit] as target entity in the relationship attribute [field westUnit]. at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(

public abstract class Core {}

public abstract class ProcessingUnit<P extends Core> implements Serializable {
   private ProcessingUnit<P> westUnit;

public class ScalarProcessingUnit extends ProcessingUnit implements Serializable {}

If I instead reference the entity subclass for the @OneToOne (virtually the same as a @ManyToOne) - I no longer get a validation exception.

   private ScalarProcessingUnit westUnit;

   thank you

Frank von Daak wrote:
Hello again,

after searching the whole day for a solution, I try to get a little help on the list.

After upgrading from Eclipselink 1.1.0 to 2.0.2, I always get Exceptions, when starting up the application:

Caused by: Exception [EclipseLink-7250] (Eclipse Persistence Services - 2.0.2.v20100323-r6872): org.eclipse.persistence.exceptions.ValidationException Exception Description: [class de.myapp.domain.MyClass] uses a non-entity [class java.lang.String] as target entity in the relationship attribute [field myfield].

I am using Generics - mabye, this causes the problem!?

The classes look like this:
public class MyClass extends MyGeneric<MyGenericType>{
}  --------------------------------------------

@Cache(type=CacheType.NONE, alwaysRefresh=true)
public abstract class MyGeneric <F extends MyField > implements MyInterface {
private F myfield; ....

What is wrong with this code?
Who can give me a little help?

Thank you very much!

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