Hi,
i need an indexed DataSource, therefore i tried the following:
FeatureSource<SimpleFeatureType,SimpleFeature> roads =
pgDataStore.getFeatureSource("roads");
SpatialIndexFeatureCollection rFc = new SpatialIndexFeatureCollection();
rFc.addAll( roads.getFeatures( filter ) );
log.debug("roads schema: "+roads.getSchema());
log.debug("rfc schema: "+rFc.getSchema());
roads = DataUtilities.source( rFc );
log.debug("roads schema: "+roads.getSchema() );
log.debug(roads.getFeatures().size());
log.debug(roads.getFeatures(filter).size());
The output, when i run the program is:
2010-08-09 11:49:11,165 DEBUG [main] urban.DataAggregation: roads schema:
SimpleFeatureTypeImpl roads identified extends
Feature(osm_id:osm_id,name:name,type:type,layer:layer,tunnel:tunnel,bridge:bridge,oneway:oneway,trackType:trackType,bicycle:bicycle,foot:foot,horse:horse,motorcycle:motorcycle,motorcar:motorcar,motor_vehicle:motor_vehicle,agricultural:agricultural,the_geom:the_geom)
2010-08-09 11:49:11,165 DEBUG [main] urban.DataAggregation: rfc schema: null
2010-08-09 11:49:11,168 DEBUG [main] urban.DataAggregation: roads schema: null
2010-08-09 11:49:11,212 DEBUG [main] urban.DataAggregation: 3595
java.lang.NullPointerException
at
org.geotools.data.collection.SpatialIndexFeatureSource.getFeatures(SpatialIndexFeatureSource.java:106)
at
org.geotools.data.collection.SpatialIndexFeatureSource.getFeatures(SpatialIndexFeatureSource.java:62)
at urban.DataAggregation.buildSample(DataAggregation.java:419)
at urban.DataAggregation.main(DataAggregation.java:474)
The NPE-exception occurs during the getFeatures(filter) call, but i don't
really have a clue why, because without the filter-argument, the methode gets
called without problems.
Am i doing something that is not intended by the developers? Is this a bug? Why
does the SpatialIndexFeatureCollection does not have a Schema?
Thank you,
Julian
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