Hi All.
I'm afraid I have another annoying question for you. I have a WFS layer
on my map and I want to be able to filter what features are returned
from the server by applying a Filter to the layer. The filter will be
built up based on some input fields in a form. I guess I am trying to
achieve the same as this:
http://www.geotools.org/display/GEOTOOLS/Filters
DataStore store = new ShapefileDataStore("citiesx020.shp");
FeatureSource features = store.getFeatureSource(store.getTypeNames()[0]);
FeatureCollection col = features.getFeatures().collection();
System.out.println("# cities (no filter)= "+col.size());
// Create the filter
FilterFactory filterFactory = FilterFactory.createFilterFactory();
CompareFilter filter = null;
try {
filter =
filterFactory.createCompareFilter(CompareFilter.COMPARE_GREATER_THAN);
FeatureType featureType = features.getFeatures().getSchema();
filter.addLeftValue(filterFactory.createAttributeExpression(featureType,"POP_2000"));
filter.addRightValue(filterFactory.createLiteralExpression(100000));
} catch (IllegalFilterException e) {
e.printStackTrace();
}
col = features.getFeatures(filter).collection();
System.out.println("# cities (after filter)= "+col.size());
The only difference is that I want the BasicFeatureRenderer to do that
for me when I supply the layer/renderer/whatever a filter to use. I'm
not actually trying to search for Features myself, I just want them
displayed on the map as the Filter provides. Can this be done?
Thanks,
Mark
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