Java Code Examples for org.locationtech.jts.geom.Polygon#getInteriorRingN()

/**
 * Creates simple arrow polygons in the direction of the coordinates.
 * 
 * @param geometries the geometries (lines and polygons) for which to create the arrows.
 * @return the list of polygon arrows.
 */
public static List<Polygon> createSimpleDirectionArrow( Geometry... geometries ) {
    List<Polygon> polygons = new ArrayList<>();
    for( Geometry geometry : geometries ) {
        for( int i = 0; i < geometry.getNumGeometries(); i++ ) {
            Geometry geometryN = geometry.getGeometryN(i);
            if (geometryN instanceof LineString) {
                LineString line = (LineString) geometryN;
                polygons.addAll(makeArrows(line));
            } else if (geometryN instanceof Polygon) {
                Polygon polygonGeom = (Polygon) geometryN;
                LineString exteriorRing = polygonGeom.getExteriorRing();
                polygons.addAll(makeArrows(exteriorRing));
                int numInteriorRing = polygonGeom.getNumInteriorRing();
                for( int j = 0; j < numInteriorRing; j++ ) {
                    LineString interiorRingN = polygonGeom.getInteriorRingN(j);
                    polygons.addAll(makeArrows(interiorRingN));
                }
            }
        }
    }
    return polygons;
}
 

/**
 * Return the number of points of a polygon in the format
 * E+I0+I1+...+In
 * where E is the number of points of the exterior ring and I0..In are
 * the number of points of the Internal rings.
 */
public static String getPoints(final Polygon p)
{
    final StringBuilder sb = new StringBuilder();
    sb.append(p.getExteriorRing().getNumPoints());
    for (int i = 0; i < p.getNumInteriorRing(); i++)
    {
        LineString ir = p.getInteriorRingN(i);
        sb.append('+').append(ir.getNumPoints());
    }

    return sb.toString();
}
 

public static JtsLineStringIterable forHolesOf(final Polygon src) {
    return new JtsLineStringIterable(new LineStringProvider() {
        @Override
        public int getNumLineStrings() {
            return src.getNumInteriorRing();
        }

        @Override
        public LineString getLineStringN(int n) {
            return src.getInteriorRingN(n);
        }
    });
}
 

/**
 * Creates a XML Polygon from a SOS Polygon.
 *
 * @param jtsPolygon
 *            SOS Polygon
 * @param xbPolType
 *            XML Polygon
 */
private void createPolygonFromJtsGeometry(Polygon jtsPolygon, PolygonType xbPolType) {
    List<?> jtsPolygons = PolygonExtracter.getPolygons(jtsPolygon);
    String srsName = getSrsName(jtsPolygon);

    for (int i = 0; i < jtsPolygons.size(); i++) {

        Polygon pol = (Polygon) jtsPolygons.get(i);

        AbstractRingPropertyType xbArpt = xbPolType.addNewExterior();
        AbstractRingType xbArt = xbArpt.addNewAbstractRing();

        LinearRingType xbLrt = LinearRingType.Factory.newInstance();

        // Exterior ring
        LineString ring = pol.getExteriorRing();
        DirectPositionListType xbPosList = xbLrt.addNewPosList();

        xbPosList.setSrsName(srsName);
        xbPosList.setStringValue(JTSHelper.getCoordinatesString(ring));
        xbArt.set(xbLrt);

        // Rename element name for output
        XmlCursor cursor = xbArpt.newCursor();
        if (cursor.toChild(GmlConstants.QN_ABSTRACT_RING_32)) {
            cursor.setName(GmlConstants.QN_LINEAR_RING_32);
        }
        cursor.dispose();

        // Interior ring
        int numberOfInteriorRings = pol.getNumInteriorRing();
        for (int ringNumber = 0; ringNumber < numberOfInteriorRings; ringNumber++) {
            xbArpt = xbPolType.addNewInterior();
            xbArt = xbArpt.addNewAbstractRing();

            xbLrt = LinearRingType.Factory.newInstance();

            ring = pol.getInteriorRingN(ringNumber);

            xbPosList = xbLrt.addNewPosList();
            xbPosList.setSrsName(srsName);
            xbPosList.setStringValue(JTSHelper.getCoordinatesString(ring));
            xbArt.set(xbLrt);

            // Rename element name for output
            cursor = xbArpt.newCursor();
            if (cursor.toChild(GmlConstants.QN_ABSTRACT_RING_32)) {
                cursor.setName(GmlConstants.QN_LINEAR_RING_32);
            }
            cursor.dispose();
        }
    }
}
 

/**
 * Creates a XML Polygon from a SOS Polygon.
 *
 * @param jtsPolygon
 *            SOS Polygon
 * @param xbPolType
 *            XML Polygon
 */
private void createPolygonFromJtsGeometry(Polygon jtsPolygon, PolygonType xbPolType) {
    List<?> jtsPolygons = PolygonExtracter.getPolygons(jtsPolygon);
    for (int i = 0; i < jtsPolygons.size(); i++) {

        Polygon pol = (Polygon) jtsPolygons.get(i);

        AbstractRingPropertyType xbArpt = xbPolType.addNewExterior();
        AbstractRingType xbArt = xbArpt.addNewRing();

        LinearRingType xbLrt = LinearRingType.Factory.newInstance(getXmlOptions());

        // Exterior ring
        LineString ring = pol.getExteriorRing();
        String coords = JTSHelper.getCoordinatesString(ring);
        DirectPositionListType xbPosList = xbLrt.addNewPosList();
        xbPosList.setSrsName(getSrsName(jtsPolygon));
        // switch coordinates
        xbPosList.setStringValue(coords);
        xbArt.set(xbLrt);

        // Rename element name for output
        XmlCursor cursor = xbArpt.newCursor();
        if (cursor.toChild(GmlConstants.QN_ABSTRACT_RING)) {
            cursor.setName(GmlConstants.QN_LINEAR_RING);
        }
        cursor.dispose();

        // Interior ring
        int numberOfInteriorRings = pol.getNumInteriorRing();
        for (int ringNumber = 0; ringNumber < numberOfInteriorRings; ringNumber++) {
            xbArpt = xbPolType.addNewInterior();
            xbArt = xbArpt.addNewRing();

            xbLrt = LinearRingType.Factory.newInstance(getXmlOptions());

            ring = pol.getInteriorRingN(ringNumber);

            xbPosList = xbLrt.addNewPosList();
            xbPosList.setSrsName(getSrsName(jtsPolygon));
            xbPosList.setStringValue(JTSHelper.getCoordinatesString(ring));
            xbArt.set(xbLrt);

            // Rename element name for output
            cursor = xbArpt.newCursor();
            if (cursor.toChild(GmlConstants.QN_ABSTRACT_RING)) {
                cursor.setName(GmlConstants.QN_LINEAR_RING);
            }
            cursor.dispose();
        }
    }
}