示例#1
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Returns the number of interior rings in a polygon.
   *
   * @param node xml element containing gml object(s)
   * @return integer number of interior rings
   * @throws QueryException query exception
   */
  @Deterministic
  public Int numInteriorRing(final ANode node) throws QueryException {
    final Geometry geo = geo(node, Q_GML_POLYGON);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Polygon");

    return Int.get(((Polygon) geo).getNumInteriorRing());
  }
示例#2
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Return a boolean value that shows weather the line is a ring or not. A line is a ring if it is
   * closed and simple.
   *
   * @param node xml element containing gml object(s)
   * @return boolean value
   * @throws QueryException query exception
   */
  @Deterministic
  public Bln isRing(final ANode node) throws QueryException {
    final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Line");

    return Bln.get(((LineString) geo).isRing());
  }
示例#3
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Returns the start point of a line.
   *
   * @param node xml element containing gml object(s)
   * @return start point geometry as a gml element
   * @throws QueryException query exception
   */
  @Deterministic
  public ANode startPoint(final ANode node) throws QueryException {
    final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Line");

    return gmlWriter(((LineString) geo).getStartPoint());
  }
示例#4
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Returns the z-coordinate value for point.
   *
   * @param node xml element containing gml object(s)
   * @return z double value
   * @throws QueryException query exception
   */
  @Deterministic
  public Dbl z(final ANode node) throws QueryException {
    final Geometry geo = geo(node, Q_GML_POINT);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Line");

    return Dbl.get(geo.getCoordinate().z);
  }
示例#5
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Returns the nth geometry of a geometry collection.
   *
   * @param node xml element containing gml object(s)
   * @param number index of i-th interior ring
   * @return n-th interior ring geometry (LineString) as a gml element
   * @throws QueryException query exception
   */
  @Deterministic
  public ANode interiorRingN(final ANode node, final Int number) throws QueryException {
    final Geometry geo = geo(node, Q_GML_POLYGON);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Polygon");

    final long n = number.itr();
    final int max = ((Polygon) geo).getNumInteriorRing();
    if (n < 1 || n > max) throw GeoErrors.outOfRangeIdx(number);
    return gmlWriter(((Polygon) geo).getInteriorRingN((int) n - 1));
  }
示例#6
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Checks if the line is closed loop. That is, if the start Point is same with end Point.
   *
   * @param node xml element containing gml object(s)
   * @return boolean value
   * @throws QueryException query exception
   */
  @Deterministic
  public Bln isClosed(final ANode node) throws QueryException {
    final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING, Q_GML_MULTILINESTRING);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Line");

    return Bln.get(
        geo instanceof LineString
            ? ((LineString) geo).isClosed()
            : ((MultiLineString) geo).isClosed());
  }
示例#7
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Returns the nth point of a line.
   *
   * @param node xml element containing gml object(s)
   * @param number index of i-th point
   * @return n-th point as a gml element
   * @throws QueryException query exception
   */
  @Deterministic
  public ANode pointN(final ANode node, final Int number) throws QueryException {
    final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING);
    if (geo == null && checkGeo(node) != null)
      throw GeoErrors.geoType(node.qname().local(), "Line");

    final int max = geo.getNumPoints();
    final long n = number.itr();
    if (n < 1 || n > max) throw GeoErrors.outOfRangeIdx(number);

    return gmlWriter(((LineString) geo).getPointN((int) n - 1));
  }
示例#8
0
文件: Geo.java 项目: runeengh/basex
  /**
   * Reads an element as a gml node. Returns a geometry element or {@code null} if the element does
   * not match one of the specified types.
   *
   * @param node xml node containing gml object(s)
   * @param names allowed geometry types
   * @return geometry, or {@code null}
   * @throws QueryException query exception
   */
  private static Geometry geo(final ANode node, final QNm... names) throws QueryException {
    if (node.type != NodeType.ELM) throw EXPTYPE_X_X_X.get(null, NodeType.ELM, node.type, node);

    final QNm qname = node.qname();
    for (final QNm geo : names) {
      if (!qname.eq(geo)) continue;
      // type found... create reader and geometry element
      try {
        final String input = node.serialize().toString();
        final GMLReader gmlReader = new GMLReader();
        final GeometryFactory geoFactory = new GeometryFactory();
        return gmlReader.read(input, geoFactory);
      } catch (final Throwable ex) {
        throw GeoErrors.gmlReaderErr(ex);
      }
    }
    return null;
  }
示例#9
0
文件: Geo.java 项目: runeengh/basex
 /**
  * Reads an element as a gml node. Returns a geometry element or throws an exception if the
  * element is of the wrong type.
  *
  * @param node xml node containing gml object(s)
  * @return geometry
  * @throws QueryException query exception
  */
 private Geometry checkGeo(final ANode node) throws QueryException {
   final Geometry geo = geo(node, QNAMES);
   if (geo == null) throw GeoErrors.unrecognizedGeo(node.qname().local());
   return geo;
 }