Chiming in late... another way to add a simple filter function is the python
community module.
http://docs.geoserver.org/latest/en/user/community/python/hooks.html#filter
Only available on trunk, and probably a bit unstable at this point but
something to look for in the future. Or now for the brave :)
-Justin
On Tue, Nov 23, 2010 at 6:32 AM, Jeremy HANOUN
<[email protected]>wrote:
> -----Message d'origine-----
> De : [email protected] [mailto:[email protected]] De la part de
> Andrea Aime
> Envoyé : Tuesday, November 23, 2010 2:23 PM
> À : Jeremy HANOUN
> Cc : [email protected]
> Objet : Re: [Geoserver-users] How to add a function
>
> On Tue, Nov 23, 2010 at 2:08 PM, Jeremy HANOUN
> <[email protected]> wrote:
> > -----Message d'origine-----
> > De : [email protected] [mailto:[email protected]] De la part de
> Andrea Aime
> > Envoyé : Tuesday, November 23, 2010 10:57 AM
> > À : Jeremy HANOUN
> > Cc : [email protected]
> > Objet : Re: [Geoserver-users] How to add a function
> >
> > On Tue, Nov 23, 2010 at 8:56 AM, Jeremy HANOUN
> > <[email protected]> wrote:
> >> Guys,
> >>
> >>
> >>
> >> I may need your help on the following point.
> >>
> >>
> >>
> >> I need to add a function to apply on Geometry and wanted to know if this
> is
> >> doable as a plugin.
> >
> > It is
> >
> >> If so, I'll be very pleased to have some information on how to do that.
> >
> > We don't have a guide but adding a function is easy enough that you can
> just
> > see how it's done and replicate.
> >
> > Look at the GeoTools main module:
> > http://svn.osgeo.org/geotools/trunk/modules/library/main/src/
> > this is where most of the function code is:
> >
> http://svn.osgeo.org/geotools/trunk/modules/library/main/src/main/java/org/geotools/filter/function/
> > this is a simple date formatting function:
> >
> http://svn.osgeo.org/geotools/trunk/modules/library/main/src/main/java/org/geotools/filter/function/FilterFunction_dateFormat.java
> >
> > To have them plug into GeoTools/GeoServer you also need to add a file
> > in META-INF declaring the existance of the function,
> > like this one:
> >
> http://svn.osgeo.org/geotools/trunk/modules/library/main/src/main/resources/META-INF/services/org.opengis.filter.expression.Function
> >
> > Hi Andrea,
> >
> > Thanks for the answer.
> >
> > I think that i've missed something...
> > I made a new project with the code for a class named
> FilterFunction_padding that extends FunctionExpressionImpl. The aim is to
> transform some geometries a little.
> > My tree looks like :
> > /src
> > /perso
> > /plugin
> > /filter
> > /function
> > FilterFunction_padding.java
> > /META-INF
> > org.opengis.filter.expression.Function
>
> Should have been /META-INF/services/org.opengis.filter.expression.Function
>
> Look at the location of the geotools file:
>
>
> http://svn.osgeo.org/geotools/trunk/modules/library/main/src/main/resources/META-INF/services/org.opengis.filter.expression.Function
>
> Thanks again Andrea,
>
> It worked, I sometime have my head in the clouds :)
>
> I'll tell you more soon about this function (when I'll have remove the
> bugs), I think this one could be helpful sometime and then I'll ask more
> questions on how to contribute to those projects (geotools and geoserver).
>
> Btw I finished the "parametric" functionality for the Env_Function.
>
> Cheers,
>
> --
> Jeremy Hanoun
>
>
>
>
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--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.
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