private void draw(
Object parentGroup, GeometryIndex parentIndex, Polygon polygon, GraphicsContext graphics) {
String groupName = baseName;
if (parentIndex != null) {
groupName += "." + editingService.getIndexService().format(parentIndex);
}
Composite bgGroup = getOrCreateGroup(parentGroup, groupName + ".background");
Composite geometryGroup = getOrCreateGroup(parentGroup, groupName + ".geometries");
// Draw the exterior ring:
GeometryIndex shellIndex =
editingService
.getIndexService()
.addChildren(parentIndex, GeometryIndexType.TYPE_GEOMETRY, 0);
if (!polygon.isEmpty()) {
if (styleService.getBackgroundStyle() != null
&& styleService.getBackgroundStyle().getFillOpacity() > 0) {
graphics.drawPolygon(bgGroup, "background", polygon, findGeometryStyle(shellIndex));
}
draw(geometryGroup, shellIndex, polygon.getExteriorRing(), graphics);
}
// Draw the interior rings:
for (int i = 0; i < polygon.getNumInteriorRing(); i++) {
GeometryIndex holeIndex =
editingService
.getIndexService()
.addChildren(parentIndex, GeometryIndexType.TYPE_GEOMETRY, i + 1);
draw(geometryGroup, holeIndex, polygon.getInteriorRingN(i), graphics);
}
}
@Test
public void testLineStringMiddleIndex() {
GeometryOperation op = new RemoveRingOperation(1);
Polygon result = (Polygon) op.execute(polygon);
Assert.assertEquals(polygon.getNumInteriorRing() - 1, result.getNumInteriorRing());
Assert.assertEquals(12.0, result.getInteriorRingN(0).getCoordinate().getX(), TOLERANCE);
}
private void execute(Polygon polygon) {
LinearRing ring = null;
if (index.isExteriorRing()) {
ring = polygon.getExteriorRing();
if (ring == null) {
ring = polygon.getGeometryFactory().createLinearRing(new Coordinate[] {coordinate});
setExteriorRing(polygon, ring);
} else {
setExteriorRing(polygon, (LinearRing) execute(ring));
}
} else if (index.getInteriorRingIndex() >= 0) {
if (index.getGeometryIndex() >= polygon.getNumInteriorRing()) {
LinearRing[] interiorRings = new LinearRing[polygon.getNumInteriorRing() + 1];
for (int i = 0; i < polygon.getNumInteriorRing(); i++) {
interiorRings[i] = polygon.getInteriorRingN(i);
}
interiorRings[polygon.getNumInteriorRing()] =
polygon.getGeometryFactory().createLinearRing(new Coordinate[] {coordinate});
setInteriorRings(polygon, interiorRings);
} else {
ring = polygon.getInteriorRingN(index.getInteriorRingIndex());
LineString lineString = execute(ring);
setInteriorRingN(polygon, (LinearRing) lineString, index.getInteriorRingIndex());
}
}
}
private void undo(Polygon polygon) {
LinearRing ring = null;
if (index.isExteriorRing()) {
ring = polygon.getExteriorRing();
LineString lineString = undo(ring);
setExteriorRing(polygon, (LinearRing) lineString);
} else if (index.getInteriorRingIndex() >= 0) {
ring = polygon.getInteriorRingN(index.getInteriorRingIndex());
LineString lineString = undo(ring);
setInteriorRingN(polygon, (LinearRing) lineString, index.getInteriorRingIndex());
}
}