Package net.postgis.jdbc.geometry

Class ComposedGeom

java.lang.Object
net.postgis.jdbc.geometry.Geometry
net.postgis.jdbc.geometry.ComposedGeom
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
GeometryCollection, MultiLineString, MultiPolygon, PointComposedGeom, Polygon
public abstract class ComposedGeom extends Geometry
ComposedGeom - Abstract base class for all Geometries that are composed out of other Geometries. In fact, this currently are all Geometry subclasses except Point.
Author:
markus.schaber@logix-tt.com
See Also:

  • Field Details

    • EMPTY

      public static final Geometry[] EMPTY

    • subgeoms

      protected Geometry[] subgeoms
      The Array containing the geometries This is only to be exposed by concrete subclasses, to retain type safety.

  • Constructor Details

    • ComposedGeom

      public ComposedGeom(int type)
      Constructs an instance with the specified type
      Parameters:
      type - int value corresponding to the geometry type.

    • ComposedGeom

      protected ComposedGeom(int type, Geometry[] geoms)

    • ComposedGeom

      protected ComposedGeom(int type, String value, boolean haveM) throws SQLException
      Throws:
      SQLException

  • Method Details

    • getSubGeometry

      public Geometry getSubGeometry(int index)

    • numGeoms

      public int numGeoms()

    • createSubGeomInstance

      protected abstract Geometry createSubGeomInstance(String token, boolean haveM) throws SQLException
      Return the appropriate instance of the sub-geometry - this encapsulates subclass specific constructor calls
      Parameters:
      token - The token containing the value for the sub-geometry
      haveM - flag to indicate the existence of a measure
      Returns:
      the new sub-geometry
      Throws:
      SQLException - if a SQLException is thrown

    • createSubGeomArray

      protected abstract Geometry[] createSubGeomArray(int size)
      Return the appropriate instance of the sub-geometry array - this encapsulates subclass specific array instantiation
      Parameters:
      size - number of elements in the array
      Returns:
      Geometry array corresponding to the sub-geometry

    • equalsintern

      protected boolean equalsintern(Geometry other)
      Description copied from class: Geometry
      Whether test coordinates for geometry - subclass specific code Implementors can assume that dimensin, type, srid and haveMeasure are equal, other != null and other is the same subclass.
      Specified by:
      equalsintern in class Geometry
      Parameters:
      other - geometry to compare
      Returns:
      true if equal, false otherwise

    • numPoints

      public int numPoints()
      Description copied from class: Geometry
      Return the number of Points of the geometry
      Specified by:
      numPoints in class Geometry
      Returns:
      number of points in the geometry

    • getPoint

      public Point getPoint(int n)
      Description copied from class: Geometry
      Get the nth Point of the geometry
      Specified by:
      getPoint in class Geometry
      Parameters:
      n - the index of the point, from 0 to numPoints()-1;
      Returns:
      nth point in the geometry

    • getLastPoint

      public Point getLastPoint()
      Optimized version
      Specified by:
      getLastPoint in class Geometry
      Returns:
      the final Point in this geometry

    • getFirstPoint

      public Point getFirstPoint()
      Optimized version
      Specified by:
      getFirstPoint in class Geometry
      Returns:
      the initial Point in this geometry

    • iterator

      public Iterator iterator()

    • isEmpty

      public boolean isEmpty()

    • mediumWKT

      protected void mediumWKT(StringBuffer sb)
      Description copied from class: Geometry
      Render the WKT without the type name, but including the brackets into the StringBuffer
      Overrides:
      mediumWKT in class Geometry
      Parameters:
      sb - StringBuffer to render into

    • innerWKT

      protected void innerWKT(StringBuffer sb)
      Description copied from class: Geometry
      Render the "inner" part of the WKT (inside the brackets) into the StringBuffer.
      Specified by:
      innerWKT in class Geometry
      Parameters:
      sb - StringBuffer to render into

    • hashCode

      public int hashCode()
      Description copied from class: Geometry
      java.lang.Object hashCode implementation
      Overrides:
      hashCode in class Geometry

    • checkConsistency

      public boolean checkConsistency()
      Description copied from class: Geometry
      Do some internal consistency checks on the geometry. Currently, all Geometries must have a valid dimension (2 or 3) and a valid type. 2-dimensional Points must have Z=0.0, as well as non-measured Points must have m=0.0. Composed geometries must have all equal SRID, dimensionality and measures, as well as that they do not contain NULL or inconsistent subgeometries. BinaryParser and WKTParser should only generate consistent geometries. BinaryWriter may produce invalid results on inconsistent geometries.
      Overrides:
      checkConsistency in class Geometry
      Returns:
      true if all checks are passed.

    • setSrid

      public void setSrid(int srid)
      Description copied from class: Geometry
      Recursively sets the srid on this geometry and all contained subgeometries
      Overrides:
      setSrid in class Geometry
      Parameters:
      srid - the SRID for this geometry