static PolygonBuilder mutatePolygonBuilder(PolygonBuilder pb) {
if (randomBoolean()) {
pb = polyWithOposingOrientation(pb);
} else {
// change either point in shell or in random hole
LineStringBuilder lineToChange;
if (randomBoolean() || pb.holes().size() == 0) {
lineToChange = pb.shell();
} else {
lineToChange = randomFrom(pb.holes());
}
Coordinate coordinate = randomFrom(lineToChange.coordinates(false));
if (randomBoolean()) {
if (coordinate.x != 0.0) {
coordinate.x = coordinate.x / 2;
} else {
coordinate.x = randomDoubleBetween(-180.0, 180.0, true);
}
} else {
if (coordinate.y != 0.0) {
coordinate.y = coordinate.y / 2;
} else {
coordinate.y = randomDoubleBetween(-90.0, 90.0, true);
}
}
}
return pb;
}
public void testCoerceShell() {
try {
new PolygonBuilder(
new LineStringBuilder(
new CoordinatesBuilder()
.coordinate(0.0, 0.0)
.coordinate(1.0, 0.0)
.coordinate(1.0, 1.0)
.build()),
Orientation.RIGHT);
fail("should raise validation exception");
} catch (IllegalArgumentException e) {
assertEquals(
"invalid number of points in LinearRing (found [3] - must be >= 4)", e.getMessage());
}
PolygonBuilder pb =
new PolygonBuilder(
new LineStringBuilder(
new CoordinatesBuilder()
.coordinate(0.0, 0.0)
.coordinate(1.0, 0.0)
.coordinate(1.0, 1.0)
.build()),
Orientation.RIGHT,
true);
assertThat(
"Shell should have been closed via coerce",
pb.shell().coordinates(false).length,
equalTo(4));
}
/**
* Takes an input polygon and returns an identical one, only with opposing orientation setting.
* This is done so we don't have to expose a setter for orientation in the actual class
*/
private static PolygonBuilder polyWithOposingOrientation(PolygonBuilder pb) {
PolygonBuilder mutation =
new PolygonBuilder(
pb.shell(),
pb.orientation() == Orientation.LEFT ? Orientation.RIGHT : Orientation.LEFT);
for (LineStringBuilder hole : pb.holes()) {
mutation.hole(hole);
}
return mutation;
}
