private Polygon editPolygon(Polygon polygon, GeometryEditorOperation operation) {
Polygon newPolygon = (Polygon) operation.edit(polygon, factory);
// create one if needed
if (newPolygon == null) newPolygon = factory.createPolygon((CoordinateSequence) null);
if (newPolygon.isEmpty()) {
// RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
return newPolygon;
}
LinearRing shell = (LinearRing) edit(newPolygon.getExteriorRing(), operation);
if (shell == null || shell.isEmpty()) {
// RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
return factory.createPolygon(null, null);
}
ArrayList holes = new ArrayList();
for (int i = 0; i < newPolygon.getNumInteriorRing(); i++) {
LinearRing hole = (LinearRing) edit(newPolygon.getInteriorRingN(i), operation);
if (hole == null || hole.isEmpty()) {
continue;
}
holes.add(hole);
}
return factory.createPolygon(shell, (LinearRing[]) holes.toArray(new LinearRing[] {}));
}
private GeometryCollection editGeometryCollection(
GeometryCollection collection, GeometryEditorOperation operation) {
// first edit the entire collection
// MD - not sure why this is done - could just check original collection?
GeometryCollection collectionForType = (GeometryCollection) operation.edit(collection, factory);
// edit the component geometries
ArrayList geometries = new ArrayList();
for (int i = 0; i < collectionForType.getNumGeometries(); i++) {
Geometry geometry = edit(collectionForType.getGeometryN(i), operation);
if (geometry == null || geometry.isEmpty()) {
continue;
}
geometries.add(geometry);
}
if (collectionForType.getClass() == MultiPoint.class) {
return factory.createMultiPoint((Point[]) geometries.toArray(new Point[] {}));
}
if (collectionForType.getClass() == MultiLineString.class) {
return factory.createMultiLineString((LineString[]) geometries.toArray(new LineString[] {}));
}
if (collectionForType.getClass() == MultiPolygon.class) {
return factory.createMultiPolygon((Polygon[]) geometries.toArray(new Polygon[] {}));
}
return factory.createGeometryCollection((Geometry[]) geometries.toArray(new Geometry[] {}));
}
private Geometry editInternal(Geometry geometry, GeometryEditorOperation operation) {
// if client did not supply a GeometryFactory, use the one from the input Geometry
if (factory == null) factory = geometry.getFactory();
if (geometry instanceof GeometryCollection) {
return editGeometryCollection((GeometryCollection) geometry, operation);
}
if (geometry instanceof Polygon) {
return editPolygon((Polygon) geometry, operation);
}
if (geometry instanceof Point) {
return operation.edit(geometry, factory);
}
if (geometry instanceof LineString) {
return operation.edit(geometry, factory);
}
Assert.shouldNeverReachHere("Unsupported Geometry class: " + geometry.getClass().getName());
return null;
}
