Hi again Jody & all,
based on your hints I have made some progress (implementing a custom
FeatureCollection implementation with Filtering and some other features
based on the examples), but some FeatureImpl-related questions remain:
My main issue concerns the correct creation of FeatureImpls. I created
my SimpleFeatures in a simple ;) way:
target = SimpleFeatureBuilder.build(targetType, new Object[]{},
source.getIdentifier().getID());
Creating a FeatureImpl compared to that:
new FeatureImpl(new HashSet(), targetType, source.getIdentifier());
I assume this is not a good idea, leading me to my second issue...
...the later modification of the FeatureImpls. Is it intended to work
like this (example with setting the geometry)?
GeometryAttribute gattr = target.getDefaultGeometryProperty();
gattr.setValue(sourceGeom);
This doesn't work (since getDefaultGeometryProperty always looks up in
the set of attributes returned by value(), where it's obviously not yet
stored).
>> - Can the Geotools StreamingRenderer also work with FeatureImpl objects?
>
> Yes; it uses the same property accessor code and expressions as the
> filter implementation.
OK, I just had to use a different method in setting up the MapContext,
because the one using FeatureCollections was fixed to accepting
SimpleFeatures.
Thanks again & cheers,
Thorsten
--
Thorsten Reitz
Fraunhofer-Institut für Graphische Datenverarbeitung IGD
[email protected] | www.igd.fraunhofer.de
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