/**
* It retrieves the features falling into the query condition. If the filter is not changed from
* the previous filter and the layer is not marked to be forcibly refreshed, it does not ask for
* features from the server, but it returns the former ones
*
* @param query The query (geotools) used to filter features
* @return
* @throws IOException
*/
@Override
public PojoFeatureCollection getFeatures(Query query) throws IOException {
Filter filter = query.getFilter();
if (filter == null) {
throw new UnsupportedOperationException(GisMessage.GENERAL_EXCEPTION_FILTER_NOTFOUND);
}
if (!(filter instanceof org.opengis.filter.spatial.BBOX)) {
throw new UnsupportedOperationException(GisMessage.GENERAL_EXCEPTION_TYPE_NOTSUPPORTED);
}
org.opengis.filter.spatial.BBOX bboxFilter = (org.opengis.filter.spatial.BBOX) filter;
org.geotools.filter.LiteralExpressionImpl literalExpression =
(org.geotools.filter.LiteralExpressionImpl) bboxFilter.getExpression2();
Geometry filteringGeometry = (Geometry) literalExpression.getValue();
Envelope boundingBox = (Envelope) filteringGeometry.getEnvelopeInternal();
double west = boundingBox.getMinX();
double east = boundingBox.getMaxX();
double south = boundingBox.getMinY();
double north = boundingBox.getMaxY();
this.ModifyFeatureCollection(west, south, east, north);
return this.collection;
}
/**
* Set the bbox for this expression
*
* @param env The envelope to set as the bounds.
* @throws IllegalFilterException If the box can not be created.
* @task HACK: currently sets the SRID to null, which can cause problems with JTS when it comes to
* doing spatial tests
*/
public final void setBounds(Envelope env) throws IllegalFilterException {
Coordinate[] coords = new Coordinate[5];
coords[0] = new Coordinate(env.getMinX(), env.getMinY());
coords[1] = new Coordinate(env.getMinX(), env.getMaxY());
coords[2] = new Coordinate(env.getMaxX(), env.getMaxY());
coords[3] = new Coordinate(env.getMaxX(), env.getMinY());
coords[4] = new Coordinate(env.getMinX(), env.getMinY());
LinearRing ring = null;
try {
ring = gfac.createLinearRing(coords);
} catch (TopologyException tex) {
throw new IllegalFilterException(tex.toString());
}
Polygon polygon = gfac.createPolygon(ring, null);
if (env instanceof ReferencedEnvelope) {
ReferencedEnvelope refEnv = (ReferencedEnvelope) env;
polygon.setUserData(refEnv.getCoordinateReferenceSystem());
}
super.setValue(polygon);
}