本文整理了Java中org.locationtech.jts.geom.Polygon.isEmpty()方法的一些代码示例，展示了Polygon.isEmpty()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Polygon.isEmpty()方法的具体详情如下：
包路径：org.locationtech.jts.geom.Polygon
类名称：Polygon
方法名：isEmpty

Polygon.isEmpty介绍

暂无

代码示例

代码示例来源：origin: geotools/geotools

public boolean isEmpty() {
  return polygon.isEmpty();
}

代码示例来源：origin: geotools/geotools

/**
 * Converts a <code>Polygon</code> to &lt;Polygon Text&gt; format, then appends it to the
 * writer.
 *
 * @param polygon the <code>Polygon</code> to process
 * @param writer the output writer to append to
 */
private void appendPolygonText(Polygon polygon, int level, boolean indentFirst, Writer writer)
    throws IOException {
  if (polygon.isEmpty()) {
    writer.write("EMPTY");
  } else {
    if (indentFirst) indent(level, writer);
    writer.write("(");
    appendLineStringText(polygon.getExteriorRing(), level, false, writer);
    for (int i = 0; i < polygon.getNumInteriorRing(); i++) {
      writer.write(", ");
      appendLineStringText(polygon.getInteriorRingN(i), level + 1, true, writer);
    }
    writer.write(")");
  }
}

代码示例来源：origin: geotools/geotools

private static void addElemInfo(
    List elemInfoList, MultiPolygon polys, final int STARTING_OFFSET, final int GTYPE) {
  Polygon poly;
  int offset = STARTING_OFFSET;
  int LEN = D(GTYPE) + L(GTYPE);
  for (int i = 0; i < polys.getNumGeometries(); i++) {
    poly = (Polygon) polys.getGeometryN(i);
    if (poly != null && !poly.isEmpty()) {
      addElemInfo(elemInfoList, poly, offset, GTYPE);
      if (isRectangle(poly)) {
        offset += (2 * LEN);
      } else {
        offset += (poly.getNumPoints() * LEN);
      }
    }
  }
}

代码示例来源：origin: geotools/geotools

/**
 * Add ordinates for polygon - with hole support.
 *
 * <p>Ensure ordinates are added in the correct orientation as External or Internal polygons.
 *
 * @param list List to add coordiantes to
 * @param polygon Polygon to be encoded
 */
private static void addCoordinatesInterpretation1(List list, Polygon polygon) {
  int holes = polygon.getNumInteriorRing();
  if (!polygon.isEmpty()) {
    addCoordinates(
        list,
        counterClockWise(
            polygon.getFactory().getCoordinateSequenceFactory(),
            polygon.getExteriorRing().getCoordinateSequence()));
    for (int i = 0; i < holes; i++) {
      addCoordinates(
          list,
          clockWise(
              polygon.getFactory().getCoordinateSequenceFactory(),
              polygon.getInteriorRingN(i).getCoordinateSequence()));
    }
  }
}

代码示例来源：origin: locationtech/jts

/**
 * Simplifies a polygon, fixing it if required.
 */
protected Geometry transformPolygon(Polygon geom, Geometry parent) {
 // empty geometries are simply removed
 if (geom.isEmpty())
  return null;
 Geometry rawGeom = super.transformPolygon(geom, parent);
 // don't try and correct if the parent is going to do this
 if (parent instanceof MultiPolygon) {
  return rawGeom;
 }
 return createValidArea(rawGeom);
}

代码示例来源：origin: locationtech/jts

/**
 * Simplifies a polygon, fixing it if required.
 */
protected Geometry transformPolygon(Polygon geom, Geometry parent)
{
 // empty geometries are simply removed
 if (geom.isEmpty())
  return null;
 Geometry rawGeom = super.transformPolygon(geom, parent);
 // don't try and correct if the parent is going to do this
 if (parent instanceof MultiPolygon) {
  return rawGeom;
 }
 return createValidArea(rawGeom);
}

代码示例来源：origin: locationtech/jts

public Coordinate[] getCoordinates() {
 if (isEmpty()) {
  return new Coordinate[]{};
 }
 Coordinate[] coordinates = new Coordinate[getNumPoints()];
 int k = -1;
 Coordinate[] shellCoordinates = shell.getCoordinates();
 for (int x = 0; x < shellCoordinates.length; x++) {
  k++;
  coordinates[k] = shellCoordinates[x];
 }
 for (int i = 0; i < holes.length; i++) {
  Coordinate[] childCoordinates = holes[i].getCoordinates();
  for (int j = 0; j < childCoordinates.length; j++) {
   k++;
   coordinates[k] = childCoordinates[j];
  }
 }
 return coordinates;
}

代码示例来源：origin: locationtech/jts

throws IOException
if (polygon.isEmpty()) {
 writer.write("EMPTY");

代码示例来源：origin: locationtech/jts

private int locateInPolygon(Coordinate p, Polygon poly)
{
 if (poly.isEmpty()) return Location.EXTERIOR;
 LinearRing shell = poly.getExteriorRing();
 int shellLoc = locateInPolygonRing(p, shell);
 if (shellLoc == Location.EXTERIOR) return Location.EXTERIOR;
 if (shellLoc == Location.BOUNDARY) return Location.BOUNDARY;
 // now test if the point lies in or on the holes
 for (int i = 0; i < poly.getNumInteriorRing(); i++) {
  LinearRing hole = poly.getInteriorRingN(i);
  int holeLoc = locateInPolygonRing(p, hole);
  if (holeLoc == Location.INTERIOR) return Location.EXTERIOR;
  if (holeLoc == Location.BOUNDARY) return Location.BOUNDARY;
 }
 return Location.INTERIOR;
}

代码示例来源：origin: locationtech/jts

private Polygon editPolygon(Polygon polygon,
              GeometryEditorOperation operation) {
 Polygon newPolygon = (Polygon) operation.edit(polygon, factory);
 // create one if needed
 if (newPolygon == null)
  newPolygon = factory.createPolygon();
 if (newPolygon.isEmpty()) {
  //RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
  return newPolygon;
 }
 LinearRing shell = (LinearRing) edit(newPolygon.getExteriorRing(), operation);
 if (shell == null || shell.isEmpty()) {
  //RemoveSelectedPlugIn relies on this behaviour. [Jon Aquino]
  return factory.createPolygon();
 }
 ArrayList holes = new ArrayList();
 for (int i = 0; i < newPolygon.getNumInteriorRing(); i++) {
  LinearRing hole = (LinearRing) edit(newPolygon.getInteriorRingN(i), operation);
  if (hole == null || hole.isEmpty()) {
   continue;
  }
  holes.add(hole);
 }
 return factory.createPolygon(shell,
                (LinearRing[]) holes.toArray(new LinearRing[] {  }));
}

代码示例来源：origin: locationtech/jts

if (poly.isEmpty()) return Location.EXTERIOR;
LinearRing shell = poly.getExteriorRing();
int shellLoc = locatePointInRing(p, shell);

代码示例来源：origin: locationtech/jts

/**
 * Computes the boundary of this geometry
 *
 * @return a lineal geometry (which may be empty)
 * @see Geometry#getBoundary
 */
public Geometry getBoundary() {
 if (isEmpty()) {
  return getFactory().createMultiLineString();
 }
 LinearRing[] rings = new LinearRing[holes.length + 1];
 rings[0] = shell;
 for (int i = 0; i < holes.length; i++) {
  rings[i + 1] = holes[i];
 }
 // create LineString or MultiLineString as appropriate
 if (rings.length <= 1)
  return getFactory().createLinearRing(rings[0].getCoordinateSequence());
 return getFactory().createMultiLineString(rings);
}

代码示例来源：origin: org.geolatte/geolatte-geom

@SuppressWarnings("unchecked")
private static <P extends Position> org.geolatte.geom.Polygon<P> from(Polygon jtsGeometry,
                                   CoordinateReferenceSystem<P> crs) {
  if (jtsGeometry.isEmpty()) {
    return new org.geolatte.geom.Polygon<P>(crs);
  }
  org.geolatte.geom.LinearRing<P>[] rings = new org.geolatte.geom.LinearRing[jtsGeometry.getNumInteriorRing() +
      1];
  org.geolatte.geom.LineString<P> extRing = from(jtsGeometry.getExteriorRing(), crs);
  rings[0] = new org.geolatte.geom.LinearRing(extRing.getPositions(), extRing.getCoordinateReferenceSystem());
  for (int i = 1; i < rings.length; i++) {
    org.geolatte.geom.LineString intRing = from(jtsGeometry.getInteriorRingN(i - 1), crs);
    rings[i] = new org.geolatte.geom.LinearRing(intRing);
  }
  return new org.geolatte.geom.Polygon(rings);
}

代码示例来源：origin: locationtech/geowave

private void writeMultiPolygon(
  MultiPolygon multiPolygon,
  PrecisionWriter precision,
  DataOutput output) throws IOException {
 Varint.writeUnsignedVarInt(multiPolygon.getNumGeometries(), output);
 for (int i = 0; i < multiPolygon.getNumGeometries(); i++) {
  Polygon polygon = (Polygon) multiPolygon.getGeometryN(i);
  if (polygon.isEmpty()) {
   Varint.writeUnsignedVarInt(0, output);
   continue;
  }
  Varint.writeUnsignedVarInt(polygon.getNumInteriorRing() + 1, output);
  precision.writePointArray(polygon.getExteriorRing().getCoordinates(), output);
  for (int j = 0; j < polygon.getNumInteriorRing(); j++) {
   precision.writePointArray(polygon.getInteriorRingN(j).getCoordinates(), output);
  }
 }
}

代码示例来源：origin: locationtech/jts

assertTrue(geometryFactory.createLinearRing(new Coordinate[] { }).isEmpty());
assertTrue(geometryFactory.createLineString(new Coordinate[] { }).isEmpty());
assertTrue(geometryFactory.createPolygon(geometryFactory.createLinearRing(new Coordinate[] { }), new LinearRing[] { }).isEmpty());
assertTrue(geometryFactory.createMultiPolygon(new Polygon[] { }).isEmpty());
assertTrue(geometryFactory.createMultiLineString(new LineString[] { }).isEmpty());
assertTrue(geometryFactory.createPolygon(null, null).isEmpty());
assertTrue(geometryFactory.createMultiPolygon(null).isEmpty());
assertTrue(geometryFactory.createMultiLineString(null).isEmpty());