Hello Jody, I'm so sorry, it was a simple copy and paste error. My AttributeExpression is "THE_GEOM", not "the_geom" as in my other featureCollection...
Regards, Kerstin -----Ursprüngliche Nachricht----- Von: Jody Garnett [mailto:[EMAIL PROTECTED] Gesendet: Dienstag, 28. November 2006 20:42 An: Kerstin Sälzer Cc: [email protected]; Geotools-devel Betreff: Implementations of featureCollection.subCollection(filter) I suspect the data provider has not implemented the subCollection( filter ) method yet - can you please tell me what DataStore you are testing with? Here is the summary thus far .... AbstractFeatureCollection - implemented - ForceCoordianteSystemFeatureResults - from super - MemoryFeatureCollection - from super - ReprojectFeatureResults - from super DataFeatureCollection - implemented - DefaultFeatureResults - from super -- JDBCFeatureCollection - from super (Please implemented this - anyone!) --- PostgisFeatureCollection - from super - EmptyFeatureCollection - from super - IndexedFeatureResults - from super DefaultFeatureCollection - implemented - GMLFeatureCollection FilteringFeatureCollection - unsupported MockFeatureCollection - not implemented, expected ReprojectingFeatureCollection - supported (best example yet) ReTypingFeatureCollection - unsupported SizeCappedFeatureCollection - unsupported SubFeatureCollection - supported - SubFeatureList - from super AbstractFeatureList - unsupported Jody > Hello, > > I'm still a bit new to geotools. I want to extract features out of one > Featurecollection into a new FeatureCollection. To do this, I use a > bounding box geometry filter. This filter is build like shown in the > tutorial. But the subcollection I get in return is empty. If I build > the new FeatureCollection manually, it contains two features. > > The following code snippet shows what I'm doing: > ... > FeatureIterator it = fc1.features(); > FeatureIterator it2 = fc2.features(); > Feature f = null; > Feature f2 = null; > FeatureCollection includes = null; > > while(it.hasNext()){ > f = it.next(); > > //build filter > Envelope envelope = f.getBounds(); > //envelope = f.getDefaultGeometry().getEnvelopeInternal(); > FilterFactory ff = FilterFactoryFinder.createFilterFactory(); > Expression bbox; > Expression geometry = ff.createAttributeExpression( "the_geom" > ); > GeometryFilter bboxFilter; > try { > bbox = ff.createBBoxExpression( envelope ); > bboxFilter = > ff.createGeometryFilter(AbstractFilter.GEOMETRY_BBOX); > bboxFilter.addLeftGeometry( geometry ); > bboxFilter.addRightGeometry( bbox ); > } catch (IllegalFilterException e) { > throw (RuntimeException) new RuntimeException( > ).initCause( e ); > } > //build new featureCollection using filter > includes = fc2.subCollection(bboxFilter); > //now the collection is empty > System.out.println(includes.size()); > > //build new featureCollection manually: > DefaultFeatureCollections dfc = new DefaultFeatureCollections(); > includes = dfc.newCollection(); > while (it2.hasNext()) { > f2 = it2.next(); > > //if(f.getDefaultGeometry().intersects(f2.getDefaultGeometry())){ > if(f.getBounds().intersects(f2.getBounds())){ > includes.add(f2); > } > } > it2.close(); > //now the collection contains two features > System.out.println(includes.size()); > } > it.close(); > ... > > Has someone ideas, why the results differ? Your help would be much > appreciated! > > Regards, > Kerstin Sälzer > > > > ---------------------------------------------------------------------- > --- Take Surveys. Earn Cash. Influence the Future of IT Join > SourceForge.net's Techsay panel and you'll get the chance to share > your opinions on IT & business topics through brief surveys - and earn > cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEV > DEV _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
