org.deegree.filter
Class OperatorFilter

java.lang.Object
  org.deegree.filter.OperatorFilter

All Implemented Interfaces:

Filter

public class OperatorFilter
extends Object
implements Filter

Filter that selects objects that test positively against Operator-based expressions.

Version:

$Revision:$, $Date:$

Author:

Markus Schneider , last edited by: $Author:$

Nested Class Summary

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

Filter.Type

Constructor Summary

OperatorFilter(Operator rootOperator)
Creates a new OperatorFilter.

Method Summary

<T> boolean	evaluate(T obj, XPathEvaluator<T> xpathEvaluator) Determines if the given object matches this Filter.
Operator	getOperator() Returns the root Operator of the test expression.
Filter.Type	getType() Always returns Filter.Type.OPERATOR_FILTER (for OperatorFilter instances).
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

OperatorFilter

public OperatorFilter(Operator rootOperator)

Creates a new OperatorFilter.

Parameters:

rootOperator - root operator that defines the test expression

Method Detail

getType

public Filter.Type getType()

Always returns Filter.Type.OPERATOR_FILTER (for OperatorFilter instances).

Specified by:

getType in interface Filter

Returns:

Filter.Type.OPERATOR_FILTER

getOperator

public Operator getOperator()

Returns the root Operator of the test expression.

Returns:

the root operator

evaluate

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

Description copied from interface: Filter

Determines if the given object matches this Filter.

Specified by:

evaluate in interface Filter

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()

Overrides:

toString in class Object