instance not of expected entity type, polymorphism

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

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http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>3.2.6.ga</version>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-annotations</artifactId>
<version>3.3.1.ga</version>
</dependency>

<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.3.2.ga</version>
</dependency>

Mapping documents:
JPA
Code between sessionFactory.openSession() and session.close():
Spring
Full stack trace of any exception that occurs:

Name and version of the database you are using:
mySQL 5.05
The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

If have the following class hierachy:
trainingscheme has trainingSet
trainingSet has trainingRepetitionBase

trainingRepetitionBase
|
|-TrainingRepetitionDistance
|-TrainingRepetitionRepetitive
|-TrainingRepetitionWeight

So when I change the trainingRepettion from one thing(TrainingRepetitionWeight) to another (TrainingRepetitionDistance
) I get this error:

org.hibernate.HibernateException: instance not of expected entity type: zeuzgroup.core.trainingscheme.TrainingRepetitionDistance is not a: zeuzgroup.core.trainingscheme.TrainingRepetitionBase
at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(AbstractEntityPersister.java:3635)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1347)
at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:180)
at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:512)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:70)
at org.hibernate.impl.SessionImpl.firePersistOnFlush(SessionImpl.java:644)
at org.hibernate.impl.SessionImpl.persistOnFlush(SessionImpl.java:636)
at org.hibernate.engine.CascadingAction$9.cascade(CascadingAction.java:323)
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:456)
at org.hibernate.event.def.DefaultPersistEventListener.entityIsPersistent(DefaultPersistEventListener.java:111)

I looked at http://opensource.atlassian.com/project ... se/HHH-667 , which could be related but are already fixed...???

hardy.ferentschik · **Posted:** Sun Mar 30, 2008 1:40 pm

Hi,

what inheritance strategy are you using? How does your db schema look like? And can you post how TrainingRepetitionBase and its subclasses are annotated?

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

Im using Joined strategy here they come:

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class TrainingRepetitionBase extends BaseEntity {
....}

@Entity
public class TrainingRepetitionWeight extends TrainingRepetitionBase {
...}

@Entity
public class TrainingRepetitionDuration extends TrainingRepetitionBase {
..}

@Entity
public class TrainingRepetitionDistance extends TrainingRepetitionDuration {
..}
@Entity
public class TrainingRepetitionRepetitive extends TrainingRepetitionDuration {
..}

hardy.ferentschik · **Posted:** Sun Mar 30, 2008 3:46 pm

Looks ok. I assume TrainingRepetitionBase has a @Id annotation as well. What's the deal with BaseEntity though? how is this class mapped? Have you tried a different inheritance strategy?

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

hardy.ferentschik wrote:

Looks ok. I assume TrainingRepetitionBase has a @Id annotation as well. What's the deal with BaseEntity though? how is this class mapped? Have you tried a different inheritance strategy?

here comes the content of baseEntity(which contains the id):

@MappedSuperclass
public abstract class BaseEntity implements Serializable {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
/**
* The version number for optimistic locking.
*/
@Version
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer version;
..
}

I have previously tried the different strategies, and found that joined or single were the only ones working, if you refered to to the parent from in a collection(http://opensource.atlassian.com/project ... se/ANN-720

)...

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

Could it be something regarding the levels of polymorphism?

parent
|
|-sub1
|
|-sub2
| |-sub2A

Because I only get the error when I use sub2A, not when using sub1 or sub2. Does this shed any lights?

schauder · **Joined:** Thu Jul 05, 2007 9:38 am **Posts:** 287

What exactly do you mean by this:

ninomartinez wrote:

Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

So when I change the trainingRepettion from one thing to another

Can you post some code including the part, that causes the exception?

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

schauder wrote:

What exactly do you mean by this:

ninomartinez wrote:

Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

So when I change the trainingRepettion from one thing to another

Can you post some code including the part, that causes the exception?

I'll post the code which causes the exception:

Code:

@Entity
public class TrainingSet extends BaseEntity {

   /**
    * Holds Training information, whether its durative distance or reptition
    * and weight based
    */
   @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
   @OneToMany(cascade = { CascadeType.ALL }, mappedBy = "trainingSet")
   private List<TrainingRepetitionBase> trainingRepetitions = new ArrayList<TrainingRepetitionBase>();

   @ManyToOne
   private Exercise exercise;

   @ManyToOne
   private TrainingSchemeAbstract trainingScheme;

   public Exercise getExercise() {
      return exercise;
   }

   public void setExercise(Exercise exercise) {
      // manually fix if exercisetype changes
      if (this.exercise==null || this.exercise.getExerciseType().compareTo(
            exercise.getExerciseType()) != 0) {
         TrainingRepetitionBase rep = null;
         // clear always!
         // TODO watchout for orphans!
         trainingRepetitions.clear();
         boolean shouldAdd = false;

         switch (exercise.getExerciseType()) {
         case Distance:
            shouldAdd = true;
[b]            rep = new TrainingRepetitionDistance(new Duration(0, 0, 0), 0,
                  this);[/b]
            break;
         case Repetitive:
            shouldAdd = true;
            [b]rep = new TrainingRepetitionRepetitive(new Duration(0, 0, 0),
                  0, this);[/b]
            break;
         case Weight:
            // shoud do nothing, let the user add reps..!
            break;
         default:
            break;
         }
         if (shouldAdd) {
            [b]trainingRepetitions.add(rep);[/b]
         }

      }
      this.exercise = exercise;
   }

   public List<TrainingRepetitionBase> getTrainingRepetitons() {

      return trainingRepetitions;
   }

   public TrainingSchemeAbstract getTrainingScheme() {
      return trainingScheme;
   }

   public void setTrainingScheme(TrainingScheme trainingScheme) {
      this.trainingScheme = trainingScheme;
   }

   public TrainingSet(Exercise exercise, TrainingSchemeAbstract trainingScheme) {
      super();
      setExercise(exercise);
      this.trainingScheme = trainingScheme;
      trainingScheme.getTrainingSets().add(this);
   }

   public TrainingSet() {
      super();
   }

It's the part in bold that makes the exception..

ninomartinez · **Joined:** Thu Jan 31, 2008 7:09 am **Posts:** 34

At it turns out this error were actually caused by the fact that I did not have and embedded class, and the class declared in persistance xml... So it was actually an class that where unmapped...