On Sat, Oct 2, 2010 at 10:28 PM, Frank Gasdorf
<[email protected]> wrote:
> Hello,
> I would like to get support for complete dynamic URL's for external graphics
> read from feature attribute(s). But the applied patch for issue
> http://jira.codehaus.org/browse/GEOT-3137 changes the API a bit and
> therefore I would like to discuss it.
> I'm not sure, there could be other ways to solve the problem, probably you
> have one !
> Please have a look at the patch, it's self-explained.
Frank, I don't believe people will have time to look into the patch, we live in
a condition where time is extremely scarce, so let me
try to sum it up (I'll do my best, you'll correct me if I'm
misunderstanding your patch).
Frank wants to have dynamic symbolizers in external graphics work even in
the case where the full url is an expression:
<ExternalGraphic>
<OnlineResource xlink:type="simple" xlink:href="${attributeImageURL}"/>
<Format>image/png</Format>
</ExternalGraphic>
However there is a catch, the ExternalGraphic interface has:
URL getLocation() throws MalformedURLException;
as the only way to get to the location. However ${attributeImageURL} is
not a valid URL, so trying to access the location like that will throw an
exception.
Internally the location is stored as a string anyways and we already have
a setURI() method, so Frank is proposing to add to the GeoTools externalGraphic
interface a:
public String getURI()
method.
A possible variant could be to use getOnlineResource().getLinkage(), but
that path a complete dead end at the moment (not really implemented and
used).
Cheers
Andrea
-----------------------------------------------------
Ing. Andrea Aime
Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584962313
fax: +39 0584962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf
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