Hello again
I found problems when doing a very simple WFS query using the GeoTools
WFSDataStore (and GeoServer). When I try to retrieve features, I get a
nice exception of the kind "Authority 'URN' is unknown or doesn't match
the supplied hints."
I looked around on JIRA and found the following (scary) issue, where the
problem was related to using the forcexy hint.
http://jira.codehaus.org/browse/GEOT-1659
Indeed, over here we need to always use FORCE_LONGITUDE_FIRST_AXIS_ORDER
as default both in GeoTools and GeoServer, since our data always comes
that way even though the CRS sometimes states otherwise.
I admit, we have a very unorthodox solution here: we added a static code
"GLOBAL.put(FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE)" in our
version of Hints.java.
Anyway: I tested removing the hint from both GeoTools and GeoServer and
- yes! - then everything works. But problems show up if either the
GeoTools client or GeoServer are using the hint in the way shown above.
So, my question is:
- How can I have GeoTools with FORCE_LONGITUDE_FIRST_AXIS_ORDER always
on, and still be capable of using WFS?
I admit that our hack here was pretty brutal, since we didn't want all
our users here to always remember to set this hint. But to end up with a
bug like this was also quite awkward. So, I'm not sure if I should
reopen GEOT-1659 or not..
Just for you guys to see how I got here, I am sending as an attachment a
very simple program that I used to test this bug (it just reads the
FeatureTypes from the WFS server and writes them to local shapefiles)
Finally, below is the full exception stacktrace:
Authority "URN" is unknown or doesn't match the supplied hints. Maybe it
is defined in an unreachable JAR file?]]
at
org.geotools.data.store.NoContentIterator.next(NoContentIterator.java:56)
at
org.geotools.data.store.NoContentIterator.next(NoContentIterator.java:41)
at
org.geotools.data.AbstractFeatureStore.addFeatures(AbstractFeatureStore.java:261)
at org.tecgraf.tdk.example.geotools.spike.TestWFS.main(TestWFS.java:60)
Caused by: org.geotools.data.wfs.protocol.wfs.WFSException: WFS returned
an exception. Target URL: http://localhost:8080/geoserver/wfs.
Originating request is:
<?xml version="1.0" encoding="UTF-8"?>
<wfs:GetFeature handle="GeoTools 2.6.0 WFS DataStore"
outputFormat="text/xml; subtype=gml/3.1.1" resultType="results"
service="WFS" version="1.1.0" xmlns:ogc="http://www.opengis.net/ogc";
xmlns:gml="http://www.opengis.net/gml";
xmlns:xlink="http://www.w3.org/1999/xlink";
xmlns:ows="http://www.opengis.net/ows";
xmlns:wfs="http://www.opengis.net/wfs";>
<wfs:Query srsName="urn:x-ogc:def:crs:EPSG:4326"
typeName="topp:tasmania_water_bodies"/>
</wfs:GetFeature>
[[We have had issues trying to flip axis of GEOGCS["WGS 84",
DATUM["World Geodetic System 1984",
SPHEROID["WGS 84", 6378137.0, 298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4326"]]
Thanks!
Milton
--
Milton Jonathan
Grupo GIS e Meio Ambiente
Tecgraf/PUC-Rio
Tel: +55-21-3527-2502
package org.tecgraf.tdk.example.geotools.spike;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.FeatureSource;
import org.geotools.data.FeatureStore;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.data.wfs.WFSDataStoreFactory;
import org.geotools.feature.FeatureCollection;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
/**
* Hello world!
*
*/
public class TestWFS
{
public static void main( String[] args )
{
try
{
URL shapeUrlSrc = new URL("http://localhost:8080/geoserver/wfs?request=GetCapabilities&service=WFS&version=1.1.0";);
Map<Object,Object> connect = new HashMap<Object,Object>();
connect.put(WFSDataStoreFactory.URL.key, shapeUrlSrc);
DataStore dataStoreSrc = DataStoreFinder.getDataStore(connect);
String[] typeNames = dataStoreSrc.getTypeNames();
int i = 0;
for (String typeName : typeNames)
{
i++;
try {
FeatureSource<SimpleFeatureType,SimpleFeature> featSource = dataStoreSrc.getFeatureSource(typeName);
FeatureCollection<SimpleFeatureType,SimpleFeature> featSrcCollection = featSource.getFeatures();
File f = new File("wfs-" + i + ".shp");
URL shapeUrlDest = f.toURI().toURL();
DataStore dataStoreDest = new ShapefileDataStore(shapeUrlDest);
SimpleFeatureType schema = dataStoreSrc.getSchema(typeName);
dataStoreDest.createSchema(schema);
FeatureStore<SimpleFeatureType,SimpleFeature> featStore = (FeatureStore<SimpleFeatureType,SimpleFeature>) dataStoreDest.getFeatureSource(typeName);
featStore.addFeatures(featSrcCollection);
}
catch (Exception ex) {
ex.printStackTrace();
}
}
System.out.println( "DONE" );
}
catch (MalformedURLException e)
{
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
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