Package net.engio.mbassy.dispatch.el

Class ElFilter

java.lang.Object

net.engio.mbassy.dispatch.el.ElFilter

All Implemented Interfaces:

IMessageFilter

public class ElFilter
extends Object
implements IMessageFilter

A filter that will use a expression from the handler annotation and parse it as EL.

Accepts a message if the associated EL expression evaluates to true

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ElFilter.ExpressionFactoryHolder

Constructor Summary

Constructors

Constructor	Description
ElFilter()

Method Summary

Modifier and Type	Method	Description
boolean	accepts(Object message, SubscriptionContext context)	Check whether the message matches some criteria
static final javax.el.ExpressionFactory	ELFactory()
private boolean	evalExpression(String expression, StandardELResolutionContext resolutionContext, SubscriptionContext context, Object message)
static final boolean	isELAvailable()

Methods inherited from class java.lang.Object

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

Constructor Details

ElFilter

public ElFilter()

Method Details

isELAvailable

public static final boolean isELAvailable()

ELFactory

public static final javax.el.ExpressionFactory ELFactory()

accepts

public boolean accepts(Object message,
 SubscriptionContext context)

Description copied from interface: IMessageFilter

Check whether the message matches some criteria

Specified by:

accepts in interface IMessageFilter

Parameters:

message - The message to be handled by the handler

context - The context object containing a description of the message handler and the bus environment

Returns:

true: if the message matches the criteria and should be delivered to the handler false: otherwise

evalExpression

private boolean evalExpression(String expression,
 StandardELResolutionContext resolutionContext,
 SubscriptionContext context,
 Object message)