On Fri, Jan 28, 2011 at 12:59 PM, Jody Garnett <[email protected]> wrote:
> Hi Andrea; I just lurked last during the last conversation. The idea is a
> sensible one; a couple questions. Do we need to be able to check this out
> when making a function (Is it information that should be available as part of
> FunctionFactory interface; or as part of FunctionName?)
As I suggested in my previous mail, it would be a interface the
function implements.
So the filter simplifier would do
if(!(function instanceof DynamicFunction)) {
...
}
to guard the simplification procedure.
> Or are you content to just have the marker interface VolitileFunction so you
> can check the result at runtime. I also note that marker interfaces have
> fallen a bit out of use in favour of annotations. Not sure we would care.
That works for me because the simplification happens against a already
created filter,
which has the function interfaces in place already.
I'd go for the marker interface, but it's just habit, having a @VolatileFunction
would work just as good I guess (err... or maybe not... are
annotations preserved
when one uses dynamic proxies and the like?)
Cheers
Andrea
--
Ing. Andrea Aime
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
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