Hi,
I'm looking into extending <af:table>, and had a question about the use
of "final" on several protected methods- notably the
"renderRegularHeaders" method in DesktopTableRenderer. All I need to do
is stick javascript onmouseover/onmouseout events (a feature the
Tomahawk table has in the form of "rowOnMouseover/rowOnMouseout") on the
TR element, which gets written there, but because the method is marked
"final," I'm stuck overriding a method way higher up the stack (haven't
figured out exactly how high yet) and copying a bunch of code verbatim.
I ran into a similar issue adding the defaultSortOrder feature I
submitted a JIRA issue about earlier; some "final" method of
ColumnGroupRenderer necessitated my extending XhtmlRenderer directly
with lots of copied code, rather than extending ColumnGroupRenderer and
overriding a method or two. (by the way, will provide working
defaultSortOrder code when I get a sec)
My question--and this is an honest question, I'm a relatively new and
self-taught Java developer--is what does marking these methods "final"
buy you? If they're marked "protected," it seems like they're designed
to be overriden. A lot of the features I'd like to add--little
Javascript here and there, maybe inline CSS on child table elements,
etc--is piddly stuff that would be great to be able to implement with
polymorphism.
Thanks in advance,
Rogers
