org.locationtech.jts.geom.Geometry.getNumGeometries()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.locationtech.jts.geom.Geometry.getNumGeometries()方法的一些代码示例，展示了Geometry.getNumGeometries()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。Geometry.getNumGeometries()方法的具体详情如下：
包路径：org.locationtech.jts.geom.Geometry
类名称：Geometry
方法名：getNumGeometries

Geometry.getNumGeometries介绍

[英]Returns the number of Geometrys in a GeometryCollection(or 1, if the geometry is not a collection).
[中]返回GeometryCollection中的几何体数（如果几何体不是集合，则返回1）。

代码示例

代码示例来源：origin: graphhopper/graphhopper

for (int i = 0; i < jsonFeature.getGeometry().getNumGeometries(); i++) {
  Geometry poly = jsonFeature.getGeometry().getGeometryN(i);
  if (poly instanceof org.locationtech.jts.geom.Polygon)

代码示例来源：origin: prestodb/presto

private static void writeGeometryCollection(Geometry collection, DynamicSliceOutput output)
{
  output.appendByte(GeometrySerializationType.GEOMETRY_COLLECTION.code());
  for (int geometryIndex = 0; geometryIndex < collection.getNumGeometries(); geometryIndex++) {
    Geometry geometry = collection.getGeometryN(geometryIndex);
    int startPosition = output.size();
    // leave 4 bytes for the shape length
    output.appendInt(0);
    writeGeometry(geometry, output);
    int endPosition = output.size();
    int length = endPosition - startPosition - Integer.BYTES;
    output.getUnderlyingSlice().setInt(startPosition, length);
  }
}

代码示例来源：origin: hibernate/hibernate-orm

protected boolean testTypeAndVertexEquality(Geometry geom1, Geometry geom2) {
  if ( !geom1.getGeometryType().equals( geom2.getGeometryType() ) ) {
    return false;
  }
  if ( geom1.getNumGeometries() != geom2.getNumGeometries() ) {
    return false;
  }
  if ( geom1.getNumPoints() != geom2.getNumPoints() ) {
    return false;
  }
  Coordinate[] coordinates1 = geom1.getCoordinates();
  Coordinate[] coordinates2 = geom2.getCoordinates();
  for ( int i = 0; i < coordinates1.length; i++ ) {
    Coordinate c1 = coordinates1[i];
    Coordinate c2 = coordinates2[i];
    if ( !testCoordinateEquality( c1, c2 ) ) {
      return false;
    }
  }
  return true;
}

代码示例来源：origin: geotools/geotools

public int getNumGeometries() {
  return geometry.getNumGeometries();
}

代码示例来源：origin: prestodb/presto

private static void writePolyline(Geometry geometry, SliceOutput output, boolean multitype)
{
  int numParts;
  int numPoints = geometry.getNumPoints();
  if (multitype) {
    numParts = geometry.getNumGeometries();
    output.writeByte(GeometrySerializationType.MULTI_LINE_STRING.code());
  }
  else {
    numParts = numPoints > 0 ? 1 : 0;
    output.writeByte(GeometrySerializationType.LINE_STRING.code());
  }
  output.writeInt(EsriShapeType.POLYLINE.code);
  writeEnvelope(geometry, output);
  output.writeInt(numParts);
  output.writeInt(numPoints);
  int partIndex = 0;
  for (int i = 0; i < numParts; i++) {
    output.writeInt(partIndex);
    partIndex += geometry.getGeometryN(i).getNumPoints();
  }
  writeCoordinates(geometry.getCoordinates(), output);
}

代码示例来源：origin: prestodb/presto

private static void writePolygon(Geometry geometry, SliceOutput output, boolean multitype)
  int numGeometries = geometry.getNumGeometries();
  int numParts = 0;
  int numPoints = geometry.getNumPoints();

代码示例来源：origin: geotools/geotools

/**
 * Set a synthetic gml:id on each child of a multigeometry. If the multigeometry has no gml:id,
 * this method has no effect. The synthetic gml:id of each child is constructed from that of the
 * parent by appending "." and then an integer starting from one for the first child.
 *
 * @param multiGeometry parent multigeometry containing the children to be modified
 */
static void setChildIDs(Geometry multiGeometry) {
  String id = getID(multiGeometry);
  if (id != null) {
    for (int i = 0; i < multiGeometry.getNumGeometries(); i++) {
      StringBuilder builder = new StringBuilder(id);
      builder.append("."); // separator
      builder.append(i + 1); // synthetic gml:id suffix one-based
      GML2EncodingUtils.setID(multiGeometry.getGeometryN(i), builder.toString());
    }
  }
}

代码示例来源：origin: geotools/geotools

@Override
public void filter(Geometry gmtr) {
  if (MultiPolygon.class.isAssignableFrom(binding)) {
    if (gmtr.getArea() != 0.0d && gmtr.getGeometryType().equals("Polygon")) {
      collection.add(gmtr);
    }
  }
  if (MultiLineString.class.isAssignableFrom(binding)) {
    if (gmtr.getLength() != 0.0d && gmtr.getGeometryType().equals("LineString")) {
      collection.add(gmtr);
    }
  }
  if (MultiPoint.class.isAssignableFrom(binding)) {
    if (gmtr.getNumGeometries() > 0 && gmtr.getGeometryType().equals("Point")) {
      collection.add(gmtr);
    }
  }
  if (Point.class.isAssignableFrom(binding)) {
    if (gmtr.getGeometryType().equals("Point")) {
      collection.add(gmtr);
    }
  }
}

代码示例来源：origin: geotools/geotools

@DescribeProcess(
  title = "Geometry Count",
  description =
      "Returns the total number of elements in a geometry collection. If not a geometry collection, returns 1. If empty, returns 0."
)
@DescribeResult(description = "Total number of geometries")
public static int numGeometries(
    @DescribeParameter(name = "geom", description = "Input geometry") Geometry collection) {
  return collection.getNumGeometries();
}

代码示例来源：origin: geotools/geotools

public static ReferencedEnvelope reprojectEnvelope(
    ReferencedEnvelope sourceEnvelope,
    CoordinateReferenceSystem targetCRS,
    ReferencedEnvelope targetReferenceEnvelope)
    throws FactoryException, TransformException {
  Geometry reprojected =
      Utils.reprojectEnvelopeToGeometry(
          sourceEnvelope, targetCRS, targetReferenceEnvelope);
  if (reprojected == null) {
    return new ReferencedEnvelope(targetCRS);
  } else {
    if (reprojected.getNumGeometries() > 1) {
      return new ReferencedEnvelope(
          reprojected.getGeometryN(0).getEnvelopeInternal(), targetCRS);
    } else {
      return new ReferencedEnvelope(reprojected.getEnvelopeInternal(), targetCRS);
    }
  }
}

代码示例来源：origin: geotools/geotools

private static Geometry smoothGeometryCollection(
    GeometryFactory factory, GeometrySmoother smoother, Geometry geom, double fit) {
  final int N = geom.getNumGeometries();
  Geometry[] smoothed = new Geometry[N];
  for (int i = 0; i < N; i++) {
    smoothed[i] = smooth(geom.getGeometryN(i), fit, factory, smoother);
  }
  return factory.createGeometryCollection(smoothed);
}

代码示例来源：origin: geotools/geotools

private static Geometry smoothMultiLineString(
    GeometryFactory factory, GeometrySmoother smoother, Geometry geom, double fit) {
  final int N = geom.getNumGeometries();
  LineString[] smoothed = new LineString[N];
  for (int i = 0; i < N; i++) {
    smoothed[i] =
        (LineString) smoothLineString(factory, smoother, geom.getGeometryN(i), fit);
  }
  return factory.createMultiLineString(smoothed);
}

代码示例来源：origin: geotools/geotools

private static Geometry smoothMultiPolygon(
    GeometryFactory factory, GeometrySmoother smoother, Geometry geom, double fit) {
  final int N = geom.getNumGeometries();
  Polygon[] smoothed = new Polygon[N];
  for (int i = 0; i < N; i++) {
    smoothed[i] = smoother.smooth((Polygon) geom.getGeometryN(i), fit);
  }
  return factory.createMultiPolygon(smoothed);
}

代码示例来源：origin: geotools/geotools

public Object parse(ElementInstance instance, Node node, Object value) throws Exception {
  // &lt;element maxOccurs="unbounded" minOccurs="0" ref="gml:curveMember"/&gt;
  List<Geometry> curveMemberList = node.getChildValues("curveMember");
  // &lt;element minOccurs="0" ref="gml:curveMembers"/&gt;
  Geometry curveMembers = (Geometry) node.getChildValue("curveMembers");
  List<LineString> lineStrings = new ArrayList<LineString>();
  if (curveMemberList != null) {
    for (Geometry curveMember : curveMemberList) {
      for (int i = 0; i < curveMember.getNumGeometries(); i++) {
        LineString lineString = (LineString) curveMember.getGeometryN(i);
        lineStrings.add(lineString);
      }
    }
  }
  if (curveMembers != null) {
    for (int i = 0; i < curveMembers.getNumGeometries(); i++) {
      LineString lineString = (LineString) curveMembers.getGeometryN(i);
      lineStrings.add(lineString);
    }
  }
  return gf.createMultiLineString(GeometryFactory.toLineStringArray(lineStrings));
}

代码示例来源：origin: geotools/geotools

protected void encodeMembers(Geometry geometry, GMLWriter handler, String gmlId)
      throws SAXException, Exception {
    for (int i = 0; i < geometry.getNumGeometries(); i++) {
      handler.startElement(member, null);
      LineString line = (LineString) geometry.getGeometryN(i);
      String childId = gmlId + "." + (i + 1);
      if (curveEncoding && line instanceof CurvedGeometry) {
        ce.encode(line, null, handler, childId);
      } else if (line instanceof LinearRing) {
        lre.encode(line, null, handler, childId);
      } else {
        lse.encode(line, null, handler, childId);
      }
      handler.endElement(member);
    }
  }
}

代码示例来源：origin: geotools/geotools

@DescribeProcess(title = "Split Polygon", description = "Splits a polygon by a linestring")
@DescribeResult(description = "The collection of split polygons")
public static Geometry splitPolygon(
    @DescribeParameter(name = "polygon", description = "Polygon to split") Geometry polygon,
    @DescribeParameter(name = "line", description = "Linestring to split by")
        LineString line) {
  Geometry nodedLinework = polygon.getBoundary().union(line);
  Geometry polys = polygonize(nodedLinework);
  // Only keep polygons which are inside the input
  List<Polygon> output = new ArrayList<Polygon>();
  for (int i = 0; i < polys.getNumGeometries(); i++) {
    Polygon candpoly = (Polygon) polys.getGeometryN(i);
    // use interior point to test for inclusion in parent
    if (polygon.contains(candpoly.getInteriorPoint())) {
      output.add(candpoly);
    }
  }
  return polygon.getFactory()
      .createGeometryCollection(GeometryFactory.toGeometryArray(output));
}

代码示例来源：origin: locationtech/spatial4j

/** Given {@code geoms} which has already been checked for being in world
 * bounds, return the minimal longitude range of the bounding box.
 */
protected Rectangle computeGeoBBox(Geometry geoms) {
 final Envelope env = geoms.getEnvelopeInternal();//for minY & maxY (simple)
 if (ctx.isGeo() && env.getWidth() > 180 && geoms.getNumGeometries() > 1)  {
  // This is ShapeCollection's bbox algorithm
  BBoxCalculator bboxCalc = new BBoxCalculator(ctx);
  for (int i = 0; i < geoms.getNumGeometries(); i++ ) {
   Envelope envI = geoms.getGeometryN(i).getEnvelopeInternal();
   bboxCalc.expandXRange(envI.getMinX(), envI.getMaxX());
   if (bboxCalc.doesXWorldWrap())
    break; // can't grow any bigger
  }
  return new RectangleImpl(bboxCalc.getMinX(), bboxCalc.getMaxX(), env.getMinY(), env.getMaxY(), ctx);
 } else {
  return new RectangleImpl(env.getMinX(), env.getMaxX(), env.getMinY(), env.getMaxY(), ctx);
 }
}

代码示例来源：origin: geotools/geotools

@Test
public void testWrapGeometryLatLonMultipleTimes() throws Exception {
  ReferencedEnvelope renderingEnvelope =
      new ReferencedEnvelope(-90, 90, -580, 540, ED50_LATLON);
  // a geometry close to the dateline
  Geometry g = new WKTReader().read("POLYGON((-74 -33, -29 -33, -29 5, -74 5, -74 -33))");
  // make sure the geometry is not wrapped, but it is preserved
  ProjectionHandler handler =
      ProjectionHandlerFinder.getHandler(renderingEnvelope, WGS84, true);
  assertTrue(handler.requiresProcessing(g));
  Geometry preProcessed = handler.preProcess(g);
  MathTransform mt = handler.getRenderingTransform(CRS.findMathTransform(WGS84, ED50_LATLON));
  Geometry transformed = JTS.transform(preProcessed, mt);
  // post process (provide identity transform to force wrap heuristic)
  Geometry postProcessed = handler.postProcess(mt, transformed);
  assertTrue(postProcessed.isValid());
  // should have been replicated three times
  assertEquals(3, postProcessed.getNumGeometries());
}

代码示例来源：origin: geotools/geotools

@Test
public void smoothMultiLineString() {
  LineString[] lines = new LineString[3];
  lines[0] = factory.createLineString(getLineCoords(0));
  lines[1] = factory.createLineString(getLineCoords(10));
  lines[2] = factory.createLineString(getLineCoords(20));
  MultiLineString mls = factory.createMultiLineString(lines);
  Geometry smoothed = JTS.smooth(mls, 0);
  assertTrue(smoothed instanceof MultiLineString);
  assertEquals(3, smoothed.getNumGeometries());
  Envelope mlsEnv = mls.getEnvelopeInternal();
  Envelope smoothEnv = smoothed.getEnvelopeInternal();
  assertTrue(smoothEnv.covers(mlsEnv));
}

代码示例来源：origin: geotools/geotools

@Test
public void smoothMultiPolygon() {
  Polygon[] polys = new Polygon[3];
  polys[0] = factory.createPolygon(factory.createLinearRing(getPolyCoords(0)), null);
  polys[1] = factory.createPolygon(factory.createLinearRing(getPolyCoords(10)), null);
  polys[2] = factory.createPolygon(factory.createLinearRing(getPolyCoords(20)), null);
  MultiPolygon mp = factory.createMultiPolygon(polys);
  Geometry smoothed = JTS.smooth(mp, 0);
  assertTrue(smoothed instanceof MultiPolygon);
  assertEquals(3, smoothed.getNumGeometries());
  Envelope mpEnv = mp.getEnvelopeInternal();
  Envelope smoothEnv = smoothed.getEnvelopeInternal();
  assertTrue(smoothEnv.covers(mpEnv));
}

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