/**
* make sure outer ring is CCW and holes are CW
*
* @param p polygon to check
*/
Polygon makeGoodSHAPEPolygon(Polygon p) {
LinearRing outer;
LinearRing[] holes = new LinearRing[p.getNumInteriorRing()];
Coordinate[] coords;
coords = p.getExteriorRing().getCoordinates();
if (cga.isCCW(coords)) {
outer = reverseRing((LinearRing) p.getExteriorRing());
} else {
outer = (LinearRing) p.getExteriorRing();
}
for (int t = 0; t < p.getNumInteriorRing(); t++) {
coords = p.getInteriorRingN(t).getCoordinates();
if (!(cga.isCCW(coords))) {
holes[t] = reverseRing((LinearRing) p.getInteriorRingN(t));
} else {
holes[t] = (LinearRing) p.getInteriorRingN(t);
}
}
return new Polygon(outer, holes, new PrecisionModel(), 0);
}
protected Geometry transformPolygon(Polygon geom, Geometry parent) {
boolean isAllValidLinearRings = true;
Geometry shell = transformLinearRing((LinearRing) geom.getExteriorRing(), geom);
if (shell == null || !(shell instanceof LinearRing) || shell.isEmpty())
isAllValidLinearRings = false;
// return factory.createPolygon(null, null);
ArrayList holes = new ArrayList();
for (int i = 0; i < geom.getNumInteriorRing(); i++) {
Geometry hole = transformLinearRing((LinearRing) geom.getInteriorRingN(i), geom);
if (hole == null || hole.isEmpty()) {
continue;
}
if (!(hole instanceof LinearRing)) isAllValidLinearRings = false;
holes.add(hole);
}
if (isAllValidLinearRings)
return factory.createPolygon(
(LinearRing) shell, (LinearRing[]) holes.toArray(new LinearRing[] {}));
else {
List components = new ArrayList();
if (shell != null) components.add(shell);
components.addAll(holes);
return factory.buildGeometry(components);
}
}
public Polygon addHole(Polygon poly, LinearRing hole) {
int nOrigHoles = poly.getNumInteriorRing();
LinearRing[] newHoles = new LinearRing[nOrigHoles + 1];
for (int i = 0; i < nOrigHoles; i++) {
newHoles[i] = (LinearRing) poly.getInteriorRingN(i);
}
newHoles[nOrigHoles] = hole;
return geomFactory.createPolygon((LinearRing) poly.getExteriorRing(), newHoles);
}
/**
* Tests whether a geometry consists of a single polygon with no holes.
*
* @return true if the geometry is a single polygon with no holes
*/
private boolean isSingleShell(Geometry geom) {
// handles single-element MultiPolygons, as well as Polygons
if (geom.getNumGeometries() != 1) return false;
Polygon poly = (Polygon) geom.getGeometryN(0);
int numHoles = poly.getNumInteriorRing();
if (numHoles == 0) return true;
return false;
}
public Geobuf.Data.Geometry polyToGeobuf(Polygon poly) {
Geobuf.Data.Geometry.Builder builder =
Geobuf.Data.Geometry.newBuilder().setType(Geobuf.Data.Geometry.Type.POLYGON);
Stream<LineString> interiorRings =
IntStream.range(0, poly.getNumInteriorRing()).mapToObj(poly::getInteriorRingN);
Stream.concat(Stream.of(poly.getExteriorRing()), interiorRings)
.forEach(r -> addRing(r, builder));
return builder.build();
}
public Geobuf.Data.Geometry multiPolyToGeobuf(MultiPolygon poly) {
Geobuf.Data.Geometry.Builder builder =
Geobuf.Data.Geometry.newBuilder().setType(Geobuf.Data.Geometry.Type.MULTIPOLYGON);
// first we specify the number of polygons
builder.addLengths(poly.getNumGeometries());
for (int i = 0; i < poly.getNumGeometries(); i++) {
Polygon p = (Polygon) poly.getGeometryN(i);
// how many rings there are
builder.addLengths(p.getNumInteriorRing() + 1);
Stream<LineString> interiorRings =
IntStream.range(0, p.getNumInteriorRing()).<LineString>mapToObj(p::getInteriorRingN);
Stream.concat(Stream.of(p.getExteriorRing()), interiorRings)
.forEach(r -> addRing(r, builder));
}
return builder.build();
}
