Class BufferResultValidator

Hierarchy: Object , BufferResultValidator

public class BufferResultValidator

Validates that the result of a buffer operation is geometrically correct, within a computed tolerance.

This is a heuristic test, and may return false positive results (I.e. it may fail to detect an invalid result.) It should never return a false negative result, however (I.e. it should never report a valid result as invalid.)

This test may be (much) more expensive than the original buffer computation.

Authors:: Martin Davis

public BufferResultValidator(Geometry input, double distance, Geometry result)

public static boolean isValid(Geometry g, double distance, Geometry result)

public static String isValidMsg(Geometry g, double distance, Geometry result)

Checks whether the geometry buffer is valid, and returns an error message if not.

Parameters:: g - g; distance - distance; result - result

Returns:: an appropriate error message or null if the buffer is valid

public boolean isValid()

public String getErrorMessage()

public Coordinate getErrorLocation()

public Geometry getErrorIndicator()

Gets a geometry which indicates the location and nature of a validation failure.

If the failure is due to the buffer curve being too far or too close to the input, the indicator is a line segment showing the location and size of the discrepancy.

Returns:: a geometric error indicator or null if no error was found