Re: [Geotools-gt2-users] how to use "Contains" filter

[Mauricio P. <mau...@ax...>]

On Wednesday 04 November 2009 04:13:35 am Michael Bedward wrote:
> No, that doesn't look quite right. With CQL the second geometry has to
> be expressed as a WKT string such as POINT(12 34) or LINESTRING(10 10,
> 20 10, 20 20).  You could do it like this...
> 
>         WKTWriter writer = new WKTWriter();
>         Geometry geom2 = ...
>         String cqlPredicate = "CONTAIMS(the_geom, " + writer.write(geom2) +
>  ")"; Filter filter = CQL.toFilter(cqlPredicate);
> 
Exactly! from http://docs.codehaus.org/display/GEOTOOLS/CQL+Parser+Design 

<georoutine argument list> ::=  <left paren><attribute name><comma><geometry 
literal><right paren>
<geometry literal> := ...

The extended syntax implemented in ECQL accepts expressions as arguments:
<georoutine argument list> ::=  "(" <expression> "," <expression> ")" 
 
You could write something like

ECQL.toFilter("CONTAINS(buffer(the_geom, 10) , POINT(1 2))") 


cheers
-- 
Mauricio Pazos
www.axios.es