[hibernate-issues] [Hibernate-JIRA] Created: (EJB-213) throw "java.lang.IllegalStateException: Property parent has an unbound type and no explicit target entity." on generic type

[Zheng.Duan (JIRA)]

throw "java.lang.IllegalStateException: Property parent has an unbound type and no explicit target entity." on generic type
---------------------------------------------------------------------------------------------------------------------------

         Key: EJB-213
         URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-213
     Project: Hibernate Entity Manager
        Type: Bug

  Components: EntityManager  
    Versions: 3.2.0.cr1    
 Environment: Hibernate version: 3.2.0.cr2<br>
Mapping documents: Annotations 3.2.0.cr1 
    Reporter: Zheng.Duan
 Attachments: jira.zip

Classes and mapping code: <br>

<code>
@MappedSuperclass
public abstract class Child<P extends Parent> {

	@Id Long id;
	@ManyToOne P parent;
	...
}

@MappedSuperclass
public abstract class Parent<C extends Child> {

	@Id @GeneratedValue Long id;
	@MapKey @OneToMany(mappedBy="parent") Map<Long,C> children = new HashMap<Long,C>();
	...
}

@Entity
public class ChildHierarchy1 extends Child<ParentHierarchy1> {
	....
}

@Entity
public class ParentHierarchy1 extends Parent<ChildHierarchy1> {
	....
}

@MappedSuperclass
public class ChildHierarchy2<P extends ParentHierarchy2> extends Child<P> {
	....
}

@MappedSuperclass
public class ParentHierarchy2<C extends ChildHierarchy2> extends Parent<C> {
	....
}

@Entity
public class ChildHierarchy22 extends ChildHierarchy2<ParentHierarchy22> {
	....
}

@Entity
public class ParentHierarchy22 extends ParentHierarchy2<ChildHierarchy22> {
	....
}
</code>

Full stack trace of exception:
<code>
Caused by: java.lang.IllegalStateException: Property parent has an unbound type and no explicit target entity.
	at org.hibernate.cfg.AnnotationBinder.addElementsOfAClass(AnnotationBinder.java:938)
	at org.hibernate.cfg.AnnotationBinder.getElementsToProcess(AnnotationBinder.java:788)
	at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:615)
	at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:353)
	at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:265)
	at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1034)
	at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1015)
	at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:154)
	at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:751)
	at org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:151)
	at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:205)
	... 4 more
</code>

if let <code>org.hibernate.cfg.AnnotationBinder.hasExplicitTargetEntity(XProperty p)</code> return <code>true</code>(it return <code>false</code> actually) then throw:<br>

<code>
Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on zhengduan.entities.ChildHierarchy22.parent references an unknown entity: zhengduan.entities.ParentHierarchy2
	at org.hibernate.cfg.FkSecondPass.doSecondPass(FkSecondPass.java:40)
	at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:288)
	at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1034)
	at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1015)
	at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:154)
	at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:751)
	at org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:151)
	at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:205)
	... 4 more
</code>
But it's wrong, <code>zhengduan.entities.ChildHierarchy22.parent</code> references <code>zhengduan.entities.ParentHierarchy22</code>, not <code>zhengduan.entities.ParentHierarchy2</code>!

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