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Unknown Id.generator: hibernate-increment

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simon.void

Post subject: Unknown Id.generator: hibernate-increment

Posted: Wed Apr 01, 2009 11:01 am

Newbie

Joined: Tue Aug 19, 2008 9:30 am
Posts: 10

hi,

i have a problem with the GenericGenerator-GeneratedValue-annotations.
When using this simple class

Code:

import javax.persistence.*;
import org.hibernate.annotations.GenericGenerator;

@MappedSuperclass
@GenericGenerator( name="hibernate-increment",strategy="increment")
public abstract class IDobject
{
  protected Long id;

  @Id @GeneratedValue(generator="hibernate-increment")
  public Long getID()
  {
    return id;
  }

  final public void setID( Long id )
  {
    if( this.id!=null ){
      throw new IllegalStateException( "id already set" );
    }
      
    this.id = id;
  }
}

i get this exception
Caused by: org.hibernate.AnnotationException: Unknown Id.generator: hibernate-increment
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.buildSessionFactory(Configuration.java:1319)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)
at server.persistence.init.AnnotatedConfigurationWrapper.init(AnnotatedConfigurationWrapper.java:52)
at server.persistence.init.AnnotatedConfigurationWrapper.<init>(AnnotatedConfigurationWrapper.java:39)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:84)
... 34 more

Is this problem, that the class is not an @Entity?

Regards,
Stephan

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simon.void

Post subject: Re: Unknown Id.generator: hibernate-increment

Posted: Thu Apr 02, 2009 9:30 am

Newbie

Joined: Tue Aug 19, 2008 9:30 am
Posts: 10

simon.void wrote:

Is this problem, that the class is not an @Entity?

Seems that way. When i insert

Code:

@org.hibernate.annotations.GenericGenerator( name="hibernate-increment",strategy="increment")

in every @Entity-class that extends IdObject, the Id.generator hibernate-increment is found. But it would be really nice if that wouldn't be neccessary.

I tried to write the @GernericGenerator-Tag in an package-info.java file

Code:

@org.hibernate.annotations.GenericGenerator( name="hibernate-increment",strategy="increment")

package server.domainobjects;

which is located in the package where IdObject and all it's subclasses are in. Then i added this package to the AnnotatedConfiguration

Code:

annotationConfiguration.addPackage( "server.domainobjects" );

but this didn't work. Doing it in hibernate.cfg.xml via <mapping package="server.domainobjects"/> didn't cut it either.

Am i missing something?

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