Yeah, what Paul described is single table inheritance that Cayenne
supports pretty well. What Cayenne doesn't support is dynamically
instantiating unmapped classes...
So whenever you create a new subclass in Java, just map it as an inherited
ObjEntity in the Modeler with "qualifier" expression field matching on
class name (e.g. "db:CLASSNAME = 'com.xyz.MySubclass'"). It shouldn't be a
big deal.
Andrus
>>
>> When I do a query or anything that accesses the rows, I would like
>> Cayenne to return the specific implementation of CayenneDataObject
>> listed in the table for that row, instead of the class listed in the
>> xml map file.
>>
>> I've tried various means of getting Cayenne to recognize the child
>> objects without any luck. I don't want to have to edit the xml map
>> file each time we add a new row implementation. Is this sort of thing
>> possible in Cayenne, or totally out of scope of the way it works?
>>
>
> Check out the inheritence support:
>
> http://objectstyle.org/cayenne/userguide/dataobjects/dataobjects-inheritance.html
>
> It's not 100% automatic, but it should work for you.
>
> Cris
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