Class IsValidOp

java.lang.Object
org.locationtech.jts.operation.valid.IsValidOp
public class IsValidOp extends Object
Implements the algorithms required to compute the isValid() method for Geometrys. See the documentation for the various geometry types for a specification of validity.
Version:
1.7

  • Constructor Details

    • IsValidOp

      public IsValidOp(Geometry parentGeometry)

  • Method Details

    • isValid

      public static boolean isValid(Geometry geom)
      Tests whether a Geometry is valid.
      Parameters:
      geom - the Geometry to test
      Returns:
      true if the geometry is valid

    • isValid

      public static boolean isValid(Coordinate coord)
      Checks whether a coordinate is valid for processing. Coordinates are valid iff their x and y ordinates are in the range of the floating point representation.
      Parameters:
      coord - the coordinate to validate
      Returns:
      true if the coordinate is valid

    • findPtNotNode

      public static Coordinate findPtNotNode(Coordinate[] testCoords, LinearRing searchRing, GeometryGraph graph)
      Find a point from the list of testCoords that is NOT a node in the edge for the list of searchCoords
      Returns:
      the point found, or null if none found

    • setSelfTouchingRingFormingHoleValid

      public void setSelfTouchingRingFormingHoleValid(boolean isValid)
      Sets whether polygons using Self-Touching Rings to form holes are reported as valid. If this flag is set, the following Self-Touching conditions are treated as being valid:
      • the shell ring self-touches to create a hole touching the shell
      • a hole ring self-touches to create two holes touching at a point

      The default (following the OGC SFS standard) is that this condition is not valid (false).

      This does not affect whether Self-Touching Rings disconnecting the polygon interior are considered valid (these are considered to be invalid under the SFS, and many other spatial models as well). This includes "bow-tie" shells, which self-touch at a single point causing the interior to be disconnected, and "C-shaped" holes which self-touch at a single point causing an island to be formed.

      Parameters:
      isValid - states whether geometry with this condition is valid

    • isValid

      public boolean isValid()
      Computes the validity of the geometry, and returns true if it is valid.
      Returns:
      true if the geometry is valid

    • getValidationError

      public TopologyValidationError getValidationError()
      Computes the validity of the geometry, and if not valid returns the validation error for the geometry, or null if the geometry is valid.
      Returns:
      the validation error, if the geometry is invalid or null if the geometry is valid