org.deegree.filter.function.se
Class Substring

java.lang.Object
  org.deegree.filter.expression.Function
      org.deegree.filter.function.se.Substring

All Implemented Interfaces:

Expression

public class Substring
extends Function

Substring

Version:

$Revision: 20558 $, $Date: 2009-11-04 13:20:57 +0100 (Mi, 04 Nov 2009) $

Author:

Andreas Schmitz, last edited by: $Author: aschmitz $

Nested Class Summary

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

Expression.Type

Constructor Summary

Substring()

Method Summary

Object[]	evaluate(MatchableObject f) Determines the values of the expression for the given MatchableObject.
void	parse(XMLStreamReader in)

Methods inherited from class org.deegree.filter.expression.Function

getName, getParameters, getParams, getType, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Substring

public Substring()

Method Detail

evaluate

public Object[] evaluate(MatchableObject f)

Description copied from interface: Expression

Determines the values of the expression for the given MatchableObject.

Note that this returns an Object[], as an expression may evaluate to multiple values, e.g. a PropertyName that targets a multi property of a feature.

Specified by:

evaluate in interface Expression

Overrides:

evaluate in class Function

Parameters:

f - object that the expression is evaluated upon

Returns:

the values of the expression, may be empty (and even contain null values), but never null

parse

public void parse(XMLStreamReader in)
           throws XMLStreamException

Parameters:

in -

Throws:

XMLStreamException