How to implement GWT editors for subclasses of a type?

Question

Let\'s say I have an object hierarchy like this:

Account > Site > Supply

An Account is an actual company, a Site is a building they have, an

Answer 1

You can have your SupplyEditor implement ValueAwareEditor.

This way, the editor framework will pass you the actual value being edited in the setValue(Supply supply); In the implementation of setValue(Supply supply) you can inspect the type of Supply and choose to show/hide any additional relevant fields.