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@GeneratorIdentifier does not work

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dodopehoenix

Post subject: @GeneratorIdentifier does not work

Posted: Fri Sep 18, 2009 4:44 am

Newbie

Joined: Fri Sep 18, 2009 4:29 am
Posts: 3

Hi,

I tried to use a custom IdentifierGenerator for entity Id generation on Seam2.1.1.GA on JBoss5.0.1GA.(uses Hibernate 3.3.1.GA as default?)

Unfortunately I cannot apply the Generator using the @GenericGenerator annotation.

Code:

@javax.persistence.Entity
@org.hibernate.annotations.GenericGenerator(
      name="test",
      strategy="com.websein.wcrm.entity.util.MySQLKeyGenerator")
public class TestDing2 {

   @javax.persistence.Id
        @javax.persistence.GeneratedValue(generator="test")
   private Long id;

   public Long getId() {return id;}

   public void setId(Long id) {this.id = id;}
}

Applying it this way produces the following stacktrace.

Code:

org.hibernate.AnnotationException: Unknown Id.generator: test
   at org.hibernate.cfg.BinderHelper.makeIdGenerator(BinderHelper.java:428)
   at org.hibernate.cfg.AnnotationBinder.bindId(AnnotationBinder.java:1901)
   at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:1279)
   at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:754)
   at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:546)
   at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:291)
   at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1148)
        ...

Debugging leads me to the assumption that this annotation simply is not present on my Class at Runtime.

Im working on this Problem for about 2 days and now I have absolutely no more ideas how to solve it. Only thing that works is defining all entites using XML hibernate mapping files. :-(

So did I miss some configuration detail to get this annotation working ?

Any help is appreciated. Ben J.

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dodopehoenix

Post subject: Re: @GeneratorIdentifier does not work

Posted: Fri Sep 18, 2009 10:50 am

Newbie

Joined: Fri Sep 18, 2009 4:29 am
Posts: 3

...
Tracked it down some more, and found out that the

Code:

org.hibernate.cfg.AnnotationBinder

private static void bindGenericGenerators(XAnnotatedElement annotatedElement, ExtendedMappings mappings) {
      ...
                 GenericGenerator defAnn = annotatedElement.getAnnotation( GenericGenerator.class );
                ...
}

becomes always null.
No Matter if Annotation is present on Package Class Method Level.

Stepping deeper ends up in

Code:

org.hibernate.annotations.common.reflection.JavaAnnotationReader

public <T extends Annotation> T getAnnotation(Class<T> annotationType) {
      return element.getAnnotation( annotationType );
   }

The element has a DeclaredAnnotation of Type org.hibernate.annotations.GenericGenerator
and the given "annotationType" is of org.hibernate.annotations.GenericGenerator

It seems as:

Code:

org.hibernate.annotations.GenericGenerator!= org.hibernate.annotations.GenericGenerator

Might this be some kind of Classloader issue ?
Version Conflict .. ?

Is there a way to workaround by adding a GenericGenerator Programmatically at Startup ?

...

---

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dodopehoenix

Post subject: Re: @GeneratorIdentifier does not work

Posted: Fri Sep 18, 2009 12:36 pm

Newbie

Joined: Fri Sep 18, 2009 4:29 am
Posts: 3

Resolved:

Indeed a version problem
Found some older hibernate-annotation.jar in classpath.
An exception which is more related to the problem would be helpful.

cheers
ben

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