org.apache.servicemix.expression

Class ExpressionHelper

java.lang.Object

org.apache.servicemix.expression.ExpressionHelper

public final class ExpressionHelper
extends java.lang.Object

A helper class for working with expressions.

Version:

$Revision: 564374 $

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	asString(Expression expression, javax.jbi.messaging.MessageExchange exchange, javax.jbi.messaging.NormalizedMessage message, java.lang.String defaultValue) Evaluates the given expression as a string value.

Methods inherited from class java.lang.Object

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

Method Detail

asString

public static java.lang.String asString(Expression expression,
                        javax.jbi.messaging.MessageExchange exchange,
                        javax.jbi.messaging.NormalizedMessage message,
                        java.lang.String defaultValue)
                                 throws javax.jbi.messaging.MessagingException

Evaluates the given expression as a string value.

Parameters:

expression - the expression to evaluate

exchange - the current exchange

message - the current message

defaultValue - the default value to use if the expression is null or the value of the expression is null

Returns:

the value of the expression as a string if it is not null or the defaultValue

Throws:

javax.jbi.messaging.MessagingException - if the expression failed to be evaluated