On Mon, Jul 4, 2011 at 7:35 PM, Andrea Aime <[email protected]>wrote:
> Hi,
> in GeoServer land we use extensively DataUtilities.mixQueries() to merge
> queries that
> are coming from two different places.
> Tipical scenario is having a layer definition query and a user provided
> query, or a
> user provided query and one coming from the security subsystem.
>
> Now, the issue here is, that mixQueries() loses too much information while
> mixing:
> sorting, forced/reprojected crs, hints and the like.
> The javadoc says so, but I guess we never paid attention to that.
>
> What I need is a mixQueries in which there is a notion of primary and
> secondary
> query, and everything that cannot be mixed should be taken from the primary
> query
> (the stuff listed above).
> This new method would then replace almost all usages of mixQueries in
> GeoServer,
> since we almost always have this primary/secondary setup
>
> Thus, I'm wondering, should I:
> a) roll a new method in DataUtilities?
> b) Make one in GeoServer?
> c) Modify the existing one so that firstQuery is taken as the primary?
>
> I'm a bit in a hurry on this one unfortunately, I guess worst case I can
> choose
> b) and switch back on either a) or c) during a weekend.
>
Actually, thinking about it the security case is a bit different, in that
mixing
two attribute lists I need to have the security one act as the only possible
set of values, thus pick the intersection, not the sum, so I need to roll
some custom bits anyways.
But... reprojection stuff, sorting, hints and the like could be shared in
a Geotools method if anyone else sees the value in something like that
Cheers
Andrea
--
-------------------------------------------------------
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf
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