Andrea,
This is a technical comment/question rather than a note about the main
proposal. (The proposal overall seems sensible to me.)
As you work with and store the ECQL filter, are you going to need
ECQL.toFilter/ECQL.toCQL to be inverses? I've seen a few cases where
that doesn't work out completely. (And I've tried to help submit
patches as I learn about them.)
Anyhow, maybe that's not necessary; figured I'd mention it.
Cheers,
Jim
On 05/20/2015 05:43 AM, Andrea Aime wrote:
Hi,
in this mail I'm proposing we resurrect an old functinality we had at
the 1.7.x times,
filtering layers by a user specified filter.
The FeatureTypeInfo filter field is indeed still there:
https://github.com/geoserver/geoserver/blob/master/src/main/src/main/java/org/geoserver/catalog/FeatureTypeInfo.java#L61
but the code around it is kind of lacking, and need some massaging and
deep testing to make
sure it actually works, since nothing in that area has been touched in
several years.
GUI wise we need a way to edit the filters, which I'm proposing is
going to be a simple text field for the moment,
that will show up below the attribute list, and which will validate
checking both syntax and proper usage of
existing attributes in the layer.
Persistence wise, we need to have XStream store the Filter (right now
there are no converters for them, which
would make for a non useful storage), which I'm proposing to store as
ECQL too.
We'll then have to verify that the filtering machinery works at the
GeoServerFeatureSource level, and that
it mixes well with user, style and security filters.
The impetus to work on this originates from simplifying and at the
same time generalizing the SORL store
usage (see related mail in GeoTools devel),
dropping the attribute based layer mapping, and replacing with a more
general CQL filter that
will also allow the same document to show up in multiple layers, but
the functionality is general and will
be useful in other cases too.
Cheers
Andrea
--
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Ing. Andrea Aime
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