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Hibernate version: 3.0 final with annotations 3.0 beta 1

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I have an interface class that I use to implement several concrete entities. For exaple:

As you can see from above, the implementation method getAgreement returns a concrete implementation of the Agreement interface but hibernate keeps asking for the interface:



How do I successfully use Abstract classes or Interface because it seems like hibernate keeps referring to them instead of the concrete entity classes.? I'm not using the inheritence annotations since I don't really need a main table for the parent class/interface.

I'm currently investigating the same issue and the understanding I have at this point is the @ManyToOne (and if required the @OneToMany) has an optional attribute called targetEntity which is a fully qualified name of the implementation class.

I belive if you augment the implementation class with

@ManyToOne (targetEntity="com.xxx.EmploymentAgreement")

this will then allow Hibernate to correctly identify that the mapped class is not the interface but is rather the implementation class.

I found from another thread http://forum.hibernate.org/viewtopic.php?t=940942&highlight=targetentity that the targetEntity might be the way to go when using interfaces or subclasses. So I did the following:



But it's still giving the same error asking for the Agreement interface so I'm at a loss.

Looks like we posted at the same time, jlowcock. Another thing I tried was to convert the interface into an abstract class like this:


The implementation/overriding of the method is fine but I get a different error saying that the agreement property is being defined twice even though I said Transient in the abstract class:

I finally found the problem and it seems to be the fact that the implementation method getAgreement() was returning the concrete class instead of the interface:


So when I changed it to the following it worked: