[Geotools-devel] How to create BBOX Filter with FilterFactory2

[Frank G. <fg...@us...>]

Hallo gt- and gs- developers,

Sorry for cross posting!

I'm using geoserver 2.x (means 2.0.x and 2.1-beta2) and try to connect with
geotools gt-wfs client to query features from different types with a bbox
filter. This should be an alternative way to the WMS getFeature requests.

I defined a query using the DEMO request on the geoserver home, the URL
request looks like this:

http://localhost:8080/geoserver/wfs?request=GetFeature&version=1.1.0&typeName=naturalEarth:ne-10m-populated-places,naturalEarth:ne-10m-admin-0-countries&BBOX=-75.102613,40.212597,-72.361859,41.512517,EPSG:4326

Note: the value for typeName parameter is a comma separated list of feature
type names. The result I got for this request is what I expected : features
are returned from more than one feature type.

Now I'd like to query using the filterFactory2.bbox method to define the
filter. How can I create a request like described before with the GT API?
The bbox method expects an expression or a string for geometry attribute
name. How can I gain it with GT API?

Any suggestions?

Thanks a lot,
Frank

code snippet:

        Map<String, String> connectionParameters = new HashMap<String,
String>();
        connectionParameters.put(
        "WFSDataStoreFactory:GET_CAPABILITIES_URL", connectionURL);
//$NON-NLS-1$
        DataStore dataStore =
DataStoreFinder.getDataStore(connectionParameters);

        String[] typeNames = dataStore.getTypeNames();
        FilterFactory2 filterFactory = CommonFactoryFinder
        .getFilterFactory2(GeoTools.getDefaultHints());
        // berlin 13.40 52.48
        String nullString = null;
        BBOX bbox = filterFactory.bbox(nullString, 13.35, 52.43, 13.45,
52.53, "4326"); //$NON-NLS-1$
        FeatureSource<SimpleFeatureType, SimpleFeature> view =
dataStore.getView(new DefaultQuery(null, bbox));
        FeatureCollection<SimpleFeatureType, SimpleFeature> features =
view.getFeatures();

        Iterator<SimpleFeature> iterator = features.iterator();

        while (iterator != null && iterator.hasNext()) {
            SimpleFeature next = iterator.next();
            SimpleFeatureType type = next.getType();
            System.out.println(type.getTypeName() + "\n\t" +
next.getDefaultGeometry());
        }