private static boolean polygonToLine(
Geometry geom, Class<? extends Geometry> targetType, Collection<Geometry> result) {
if (geom instanceof Polygon && LineString.class == targetType) {
Polygon polygon = (Polygon) geom;
result.add(
geomBuilder.safeCreateGeometry(
LineString.class, polygon.getExteriorRing().getCoordinates()));
int i = 0;
while (i < polygon.getNumInteriorRing()) {
result.add(
geomBuilder.safeCreateGeometry(
LineString.class, polygon.getInteriorRingN(i).getCoordinates()));
i++;
}
return true;
}
return false;
}
private static boolean simpleToMultiPolygon(
Geometry geom, Class<? extends Geometry> targetType, Collection<Geometry> result) {
if (!(geom instanceof Polygon)
&& !(geom instanceof GeometryCollection)
&& MultiPolygon.class == targetType) {
result.add(geomBuilder.safeCreateGeometry(targetType, geom.getCoordinates()));
return true;
}
return false;
}
private static boolean collectionToMultiPolygon(
Geometry geom, Class<? extends Geometry> targetType, Collection<Geometry> result) {
if (!(geom instanceof Polygon)
&& geom instanceof GeometryCollection
&& MultiPolygon.class == targetType) {
for (int i = 0; i < geom.getNumGeometries(); i++) {
result.add(
geomBuilder.safeCreateGeometry(targetType, geom.getGeometryN(i).getCoordinates()));
}
return true;
}
return false;
}
private static boolean collectionToMultiLine(
Geometry geom, Class<? extends Geometry> targetType, Collection<Geometry> result) {
if (!(geom instanceof Polygon)
&& !(geom instanceof MultiPolygon)
&& (geom instanceof GeometryCollection)
&& MultiLineString.class == targetType) {
LineString[] geoms = new LineString[geom.getNumGeometries()];
for (int i = 0; i < geom.getNumGeometries(); i++) {
geoms[i] =
geomBuilder.safeCreateGeometry(LineString.class, geom.getGeometryN(i).getCoordinates());
}
result.add(geomBuilder.factory.createMultiLineString(geoms));
return true;
}
return false;
}
private static boolean toLinearRing(
Geometry geom, Class<? extends Geometry> targetType, Collection<Geometry> result) {
if (!(targetType == LinearRing.class)) return false;
ArrayList<Geometry> tmp = new ArrayList<Geometry>();
if (!simpleToLine(geom, LineString.class, tmp)) {
if (!collectionToLine(geom, LineString.class, tmp)) {
if (!polygonToLine(geom, LineString.class, tmp)) {
if (!multiPolygonToLine(geom, LineString.class, tmp)) {
return false;
}
}
}
}
for (Geometry geometry : tmp) {
result.add(geomBuilder.safeCreateGeometry(targetType, geometry.getCoordinates()));
}
return true;
}
