org.locationtech.jts.operation.buffer.validate

Class BufferResultValidator

java.lang.Object

org.locationtech.jts.operation.buffer.validate.BufferResultValidator

public class BufferResultValidator
extends Object

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.

Author:

Martin Davis

Constructor Summary

Constructors

Constructor and Description
BufferResultValidator(Geometry input, double distance, Geometry result)

Method Summary

Modifier and Type	Method and Description
Geometry	getErrorIndicator() Gets a geometry which indicates the location and nature of a validation failure.
Coordinate	getErrorLocation()
String	getErrorMessage()
boolean	isValid()
static boolean	isValid(Geometry g, double distance, Geometry result)
static String	isValidMsg(Geometry g, double distance, Geometry result) Checks whether the geometry buffer is valid, and returns an error message if not.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BufferResultValidator

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

Method Detail

isValid

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

isValidMsg

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 -

distance -

result -

Returns:

an appropriate error message or null if the buffer is valid

isValid

public boolean isValid()

getErrorMessage

public String getErrorMessage()

getErrorLocation

public Coordinate getErrorLocation()

getErrorIndicator

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