[geotk] CQL filter - error parsing geometry operation

[sorel johann]

Hello,

I'm not the most familiar with cql, cedric should know more.
But by looking at the test cases, there are a few examples like :
CONTAINS(ATTR1, POINT(1 2))
DISJOINT(the_geom, POINT(1 2))

I made a try an it seems the first parameter must be the attribute you 
refer to.


More usually I write them in full java. it's a bit longer but it's more 
efficient too.
         final GeometryFactory GF = new GeometryFactory();
         final FilterFactory2 FF = (FilterFactory2) 
FactoryFinder.getFilterFactory(null);

         final Polygon poly = GF.createPolygon(GF.createLinearRing(new 
Coordinate[]{
             new Coordinate(2,64),
             new Coordinate(2,73),
             new Coordinate(4,68),
             new Coordinate(2,64)}),
             new LinearRing[0]);
         final Point point = GF.createPoint(new Coordinate(3, 68));
         final Filter filter = FF.contains(FF.literal(poly), 
FF.literal(point));

         System.out.println(filter);
         System.out.println(filter.evaluate(null));

hope this helps

johann


Le 16/02/2011 15:35, Westgård Trond a écrit :
>
> I tried to test examples using the CQL and the FilterFactory.
>
> It works OK for me for features attributes that are date, string and 
> numbers.
>
> I then selects the features I should expect (examples of filter text: 
> "employee_no BETWEEN 1000 AND 8000" etc.)
>
> Now I wanted to use some geometry operations. I started out using an 
> expression that should be true always:
>
> myfilter = CQL.toFilter("contains(polygon((2 64,2 73,4 68, 2,64)), 
> point(3 68))");
>
> The exception states that this expression lacks an operator and is an 
> invalid filterexpression. (I also tried with st_contains instead of 
> contains).
>
> Any of the experts that could give me a hint -- ideally a link to 
> examples/documentation ???
>
> Trond Westgård
>
> Senior Engineer
>
> Institute of Marine Research
>
> Bergen, Norway
>
> trondwe at imr.no
>
>
> _______________________________________________
> Geotoolkit mailing list
> Geotoolkit at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/geotoolkit

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