JTS Topology Suite version 1.13

com.vividsolutions.jts.operation.buffer.validate
Class BufferResultValidator

java.lang.Object
  extended by com.vividsolutions.jts.operation.buffer.validate.BufferResultValidator

public class BufferResultValidator
extends java.lang.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
BufferResultValidator(Geometry input, double distance, Geometry result)
           
 
Method Summary
 Geometry getErrorIndicator()
          Gets a geometry which indicates the location and nature of a validation failure.
 Coordinate getErrorLocation()
           
 java.lang.String getErrorMessage()
           
 boolean isValid()
           
static boolean isValid(Geometry g, double distance, Geometry result)
           
static java.lang.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
clone, equals, finalize, 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 java.lang.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 java.lang.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

JTS Topology Suite version 1.13