[news.eclipse.rt.eclipselink] Interface annotation?

[ana.oleski@xxxxxxxxxxxxxx (Ana Oleski)]

Hi,

In toplink/eclipselink native there is this advanced feature, where you 
can query on an interface. 

For instance if Cat and Dog both implement a common interface, say 
Lovable, but are mapped in different tables and don't even have a common 
superclass you can send a ReadAllQuery(Lovable.class) and get both cats 
and dogs. 

Can I define this with annotations? I know it's not JPA standard, but I 
looked in the JPA Extensions and found VariableOneToOneMapping, which is a 
mapping to an interface. So I was wondering if one can annotate an 
interface, maybe define its query keys in the annotation, and be able to 
query on them. With EJBQL?


In the native project.xml it's something like this

    <class-mapping-descriptor 
xsi:type="relational-class-mapping-descriptor">
        <class>pet.Lovable</class>
       ..
        <query-keys>
           <query-key name="sweetnessFactor" xsi:type="query-key"/>
            ..
        </query-keys>    
     </class-mapping-descriptor>

   <class-mapping-descriptor 
xsi:type="relational-class-mapping-descriptor">
        <class>pet.Cat</class>
         ..  
         <interfaces>
           <interface>pet.Lovable</interface>
        </interfaces>
    </class-mapping-descriptor>


Thanx,

Ana