[Figleaf-developer] Validation and Observable support

[Greg S. <ste...@on...>]

I was working on the drag-and-drop support and thought of another case 
to handle with the validation framework: a property is a collection, and 
an element gets added to the collection. The property setter isn't 
called. Only "get" is needed to get the collection, then the collection 
add method is used. This also applies to the Observable interface - 
intercepting the set call alone won't work.

One solution would be to add "addElement" and "deleteElement" methods to 
the PropertyDescriptor. This gets more complicated when you start to 
consider what if the type is actually a Map, or some unknown custom 
aggregate type, etc.

Greg