org.deegree.filter.comparison
Class ComparisonOperator

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

All Implemented Interfaces:

Operator

Direct Known Subclasses:

BinaryComparisonOperator, PropertyIsBetween, PropertyIsLike, PropertyIsNull

public abstract class ComparisonOperator
extends Object
implements Operator

TODO add documentation here

Version:

$Revision:$, $Date:$

Author:

Markus Schneider , last edited by: $Author:$

Nested Class Summary

static class

ComparisonOperator.SubType

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

Operator.Type

Field Summary

protected boolean

matchCase

Constructor Summary

protected

ComparisonOperator(boolean matchCase)

Method Summary

protected Comparable<Object>	checkComparableOrNull(Object value) Performs a checked cast to Comparable.
boolean	getMatchCase()
abstract Expression[]	getParams()
abstract ComparisonOperator.SubType	getSubType()
Operator.Type	getType() Returns the type of operator.
protected Pair<Object,Object>	makeComparable(Object value1, Object value2)

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

evaluate, toString

Field Detail

matchCase

protected boolean matchCase

Constructor Detail

ComparisonOperator

protected ComparisonOperator(boolean matchCase)

Method Detail

getType

public Operator.Type getType()

Description copied from interface: Operator

Returns the type of operator. Use this to safely determine the subtype of Operator.

Specified by:

getType in interface Operator

Returns:

type of operator

getMatchCase

public boolean getMatchCase()

getSubType

public abstract ComparisonOperator.SubType getSubType()

checkComparableOrNull

protected Comparable<Object> checkComparableOrNull(Object value)
                                            throws FilterEvaluationException

Performs a checked cast to Comparable. If the given value is neither null nor a Comparable instance, a corresponding FilterEvaluationException is thrown.

Parameters:

value -

Returns:

the very same value (if it is a Comparable or null)

Throws:

FilterEvaluationException - if the value is neither null nor a Comparable

makeComparable

protected Pair<Object,Object> makeComparable(Object value1,
                                             Object value2)
                                      throws FilterEvaluationException

Throws:

FilterEvaluationException

getParams

public abstract Expression[] getParams()