On Thu, 14 Aug 2003, Stephen Colebourne wrote:
> <snip>
>
> The biggest problem with all this is that the collection returned by
> getSource() on the event. If the observed collection is wrapped (eg. by a
> SyncronizedCollection) then getSource() SHOULD return the wrapped
> collection, but it can't as it doesn't know about it. This problem applies
> to all designs so far.
Is this also a problem? It's general to all of the delegation
implementations.
private boolean heardChange = false;
public void testChangeToBackingCollection()
{
Collection c = new ArrayList();
ObservableCollection oc = CollectionUtils.observableCollection(c);
oc.addListener(new CollectionListener()
{
public void changed(CollectionEvent e) { heardChange = true; }
});
c.add("hello");
assertTrue("heardChange == true", heardChange == true);
}
I don't think it's possible to make this test pass -- just a
shortcoming of the wrapper design. That's why I was looking into
aspect-based implementations.
michael
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