Description Martin Taal 2011-11-01 16:57:21 EDT

In the following case the EMFTuplizer will determine an incorrect entityname:

See description by user:

Today I tried to create a mapping that uses single table per hierarchy that have a concrete EMF class as a base and then all subclasses are dynamic EMF classes.

I found out that the hibernate treated all instances as of they were from the base class and not from the subclasses - e.g. all properties that are set in the subclasses are not persisted and the discriminator value that is used is from the base (root) class. Digging more into this issue I found out that the following method on EMFTuplizer class

public String determineConcreteSubclassEntityName(Object entityInstance, SessionFactoryImplementor factory) {
final Class<?> concreteEntityClass = entityInstance.getClass();
if (concreteEntityClass == getMappedClass()) {
return getEntityName();
} else {
String entityName = getEntityMetamodel().findEntityNameByEntityClass(concreteEntityClass);
if (entityName == null) {
throw new HibernateException("Unable to resolve entity name from Class ["
+ concreteEntityClass.getName() + "]" + " expected instance/subclass of [" + getEntityName()
+ "]");
}
return entityName;
}
}


returns always the entity name for the root EMF class because the getMappedClass() is always equal to the concreteEntityClass ( note that when I create a objects from subclasses the actual base class will be the implementation class of the root EMF class (the one that is generated - not dynamic))