Justin Deoliveira ha scritto:
> It is currently unclear how to proceed on the valid KML issue. The issue 
> can be summed up in this jira issue:
> 
> http://jira.codehaus.org/browse/GEOS-2447
> 
> But basically it boils down to that with the patch as written, we can't 
> generate KML from datastores which do not provide reliable fids. The 
> most common case of this is a db table with a primary key.
> 
> However i am told from arne that if we do not produce valid KML then 
> there are issues with GeoSearch.
> 
> Dwins came up with the idea to use a temp file approach. David can you 
> expand on this? I am not 100% sure what the plan is there.

I would like to throw in one detail. For most maps it's not like
we really need to generate a style per feature. If all the styles
are attribute independent, we actually need just to generate
a proper combination of them based on the existing rules and
feature type styles (the possible combinations on how the
filters and the like make them up).

Yet you're right, if a style is dynamic, that is, actually
depends on feature attributes, then we need a style per feature,
and that may require a double scan.
Wondering if assuming the iteration order will be the same is
too much... it will break if a transaction occurs between
the two scans.

Cheers
Andrea

-- 
Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.

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