List editing with Editor/RequestFactory + GAE/Objectify

Hi,

to get accustomed to GAE as well as GWT 2.1, I am working on a pet
project for managing Recipes. A Recipe has multiple Ingredients, which
I want to display in a CellTable, each Ingredient having (editable)
columns for Amount and Type. New Ingredient lines in the table can be
added with a button, existing ingredients can be removed and reordered
by buttons (or DnD later).
So now I am trying to figure out how to wire this up with the Editor
framework and RequestFactory on the Client-side and the GAE datastore
and Objectify (or JDO, if that makes it any easier). I created some
dummy Recipe object with a getIngredients()-list with some dummy
Ingredients and managed to get the CellTable populated with these by
the Editor driver automatically.

What I do not understand however is how far this databinding goes? How
would I implement an "Add Ingredient" button, that would create a new
empty Ingredient, and would I have to create the CellTable row for
that manually or would the Editor driver do that for me?

My other question is related to the Server model. RequestFactory seems
to be tailored to JDO/JPA. Apparently, to enable the Editor framework
work, my Recipe class needs a getIngredients() method. How should I
implement this in an Objectify based persistence?

Thank you,
Tobias

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