org.deegree.filter.comparison
Class BinaryComparisonOperator

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

All Implemented Interfaces:

Operator

Direct Known Subclasses:

PropertyIsEqualTo, PropertyIsGreaterThan, PropertyIsGreaterThanOrEqualTo, PropertyIsLessThan, PropertyIsLessThanOrEqualTo, PropertyIsNotEqualTo

public abstract class BinaryComparisonOperator
extends ComparisonOperator

Abstract base class for all binary comparison operators.

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

protected Expression	param1
protected Expression	param2

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

matchAction, matchCase

Constructor Summary

protected

BinaryComparisonOperator(Expression param1, Expression param2, Boolean matchCase, MatchAction matchAction)

Method Summary

protected abstract boolean	compare(PrimitiveValue param1, PrimitiveValue param2)
<T> boolean	evaluate(T obj, XPathEvaluator<T> xpathEvaluator) Determines the value of the boolean operator.
Expression	getParameter1()
Expression	getParameter2()
Expression[]	getParams()

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

checkComparableOrNull, getMatchAction, getPrimitiveValues, getSubType, getType, isMatchCase

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.deegree.filter.Operator

toString

Field Detail

param1

protected final Expression param1

param2

protected final Expression param2

Constructor Detail

BinaryComparisonOperator

protected BinaryComparisonOperator(Expression param1,
                                   Expression param2,
                                   Boolean matchCase,
                                   MatchAction matchAction)

Method Detail

getParameter1

public Expression getParameter1()

getParameter2

public Expression getParameter2()

getParams

public Expression[] getParams()

Specified by:

getParams 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

compare

protected abstract boolean compare(PrimitiveValue param1,
                                   PrimitiveValue param2)