This is a little demo of how you can (and can't) use polymorphic queries in Objectify for Google AppEngine. I wrote a detailed writeup on my blog.

I created this based on the help I got from Jeff Schnitzer in the objectify-appengine Google group.

appengine-api-labs.jar

appengine-api-stubs.jar

appengine-api.jar

appengine-testing.jar

junit-4.10.jar

objectify-4.0b1.jar