/**
* {@inheritDoc}
*
* @param params a {@code Double} value for the search radius to use with point or line features
* @return the features that lie within the search radius of {@code pos}; if this helper is not
* valid an empty collection will be returned
* @throws IOException if the feature source for the layer cannot be accessed
*/
public FeatureCollection getInfo(DirectPosition2D pos, Object... params) throws IOException {
FeatureCollection<? extends FeatureType, ? extends Feature> collection = null;
MapLayer layer = layerRef.get();
if (layer != null) {
Filter filter = null;
if (isPolygonGeometry) {
/*
* Polygon features - use an intersects filter
*/
Geometry posGeom = createSearchPos(pos);
filter =
filterFactory.intersects(
filterFactory.property(attrName), filterFactory.literal(posGeom));
} else {
/*
* Line or point features - use a bounding box filter
*/
double radius = ((Number) params[0]).doubleValue();
ReferencedEnvelope env = createSearchEnv(pos, radius);
filter = filterFactory.bbox(filterFactory.property(attrName), env);
}
DefaultQuery query = new DefaultQuery(null, filter);
query.setCoordinateSystemReproject(getMapContext().getCoordinateReferenceSystem());
collection = layer.getFeatureSource().getFeatures(query);
}
return collection;
}
