org.deegree.filter.comparison
Class PropertyIsNull

java.lang.Object
  org.deegree.filter.comparison.ComparisonOperator
      org.deegree.filter.comparison.PropertyIsNull

All Implemented Interfaces:

Operator

public class PropertyIsNull
extends ComparisonOperator

TODO add documentation here

Version:

$Revision:$, $Date:$

Author:

Markus Schneider , last edited by: $Author:$

Nested Class Summary

Nested classes/interfaces inherited from class org.deegree.filter.comparison.ComparisonOperator

ComparisonOperator.SubType

Nested classes/interfaces inherited from interface org.deegree.filter.Operator

Operator.Type

Field Summary

Fields inherited from class org.deegree.filter.comparison.ComparisonOperator

matchAction, matchCase

Constructor Summary

PropertyIsNull(Expression propName, MatchAction matchAction)

Method Summary

<T> boolean	evaluate(T obj, XPathEvaluator<T> xpathEvaluator) Determines the value of the boolean operator.
Expression[]	getParams()
Expression	getPropertyName()
ComparisonOperator.SubType	getSubType()
String	toString(String indent)

Methods inherited from class org.deegree.filter.comparison.ComparisonOperator

checkComparableOrNull, getMatchAction, getPrimitiveValues, getType, isMatchCase

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyIsNull

public PropertyIsNull(Expression propName,
                      MatchAction matchAction)

Method Detail

getPropertyName

public Expression getPropertyName()

getSubType

public ComparisonOperator.SubType getSubType()

Specified by:

getSubType in class ComparisonOperator

evaluate

public <T> boolean evaluate(T obj,
                            XPathEvaluator<T> xpathEvaluator)
                 throws FilterEvaluationException

Description copied from interface: Operator

Determines the value of the boolean operator.

Type Parameters:

T - type of the context object

Parameters:

obj - object that the operator is evaluated upon, must not be null

xpathEvaluator - used for evaluation of XPath expressions, must not be null

Returns:

true, if the operator evaluates to true, false otherwise

Throws:

FilterEvaluationException - if the evaluation fails

toString

public String toString(String indent)

getParams

public Expression[] getParams()

Specified by:

getParams in class ComparisonOperator