I have serious problems with the CGLIB generated proxy classes in a 1:1 relationship.

The generated proxies implement all the business interfaces of the proxied class, but they don't inherit from it, i.e.

IPerson myPersonProxy = bean.getPerson();
System.out.println(myPersonProxy instanceof IPerson); // -> true
System.out.println(myPersonProxy instanceof Person); // -> false

The Hibernate book says that the CGLIB generated proxies both...
* implement all interfaces that the proxied class implements
* inherits from the proxied class (or it's parent ?)

Any hints ?

Be aware that proxied classes have problems with inheritance. If Person inherit from User and you have an association with a User, hibernate will create a User subclass and then cannot switch to a Person subclass

This is exactly the case. All my beans that are persisted by Hibernate are inherited from a common baseclass.

If it's true what you say then those CGLIB proxies are rather useless, IMHO.

No, the problems occurs only when you have an association to your base class.

If your assocation is to a Person instance then there is no problem. But if you association is to a IPerson instance then I think the proxy won't extends the Person class

Ok, now I get it.

Unfortunately I must implement the business interfaces which constrain the types of the associated objects to other business interfaces, not to business objects.

Is there any way to tell CGLIB to generate proxies that derive from a user provided class instead of only implementing a business interface ?

You need to tell it for hibernate using mappings, just use implementation name in mappings to extend class, if this class implements interfaces then generated class will implement them too.

I already use the implementation class name in the mapping, i.e.

This is my mapping:


These are the setters:


However I still get proxies that just implement the IBusinessReportInfo, but that don't inherit from the object BusinessReportInfoHPB.

My fault: The proxy class in the class section was still pointing to IBusinessRelationshipInfo.

Wrong:


Correct:


A thousand thanks to the forum members for pointing me into the right direction. You saved my day.