org.mmbase.core.event

Class RelationEventBroker

java.lang.Object

org.mmbase.core.event.EventBroker

org.mmbase.core.event.AbstractEventBroker

org.mmbase.core.event.RelationEventBroker

public class RelationEventBroker
extends AbstractEventBroker

This class is the event broker implementation for the RelationEvent

Since:

MMBase-1.8

Version:

$Id$

Author:

Ernst Bunders, Ernst Bunders

Field Summary

Fields

Modifier and Type	Field and Description
static String	PROPERTY_NODETYPE use this property to make shure your listener only gets the relation events where the node number matches the given value.

Constructor Summary

Constructors

Constructor and Description
RelationEventBroker()

Method Summary

Modifier and Type	Method and Description
boolean	canBrokerForEvent(Event event) this method should return true if this event broker can broker for events of this type.
boolean	canBrokerForListener(EventListener listener) this method should return true if this broker can accept and propagate events to the listener of this type.
protected void	notifyEventListener(Event event, EventListener listener) This method has two functions.
String	toString()

Methods inherited from class org.mmbase.core.event.AbstractEventBroker

addListener, backing, removeListener

Methods inherited from class org.mmbase.core.event.EventBroker

equals, getListeners, hashCode, notifyForEvent

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

PROPERTY_NODETYPE

public static final String PROPERTY_NODETYPE

use this property to make shure your listener only gets the relation events where the node number matches the given value.

See Also:

Constant Field Values

Constructor Detail

RelationEventBroker

public RelationEventBroker()

Method Detail

canBrokerForListener

public boolean canBrokerForListener(EventListener listener)

Description copied from class: EventBroker

this method should return true if this broker can accept and propagate events to the listener of this type. There are no fixed criteria for this. Most implementions do event instanceof <EventListener associated with this broker>

Specified by:

canBrokerForListener in class EventBroker

canBrokerForEvent

public boolean canBrokerForEvent(Event event)

Description copied from class: EventBroker

this method should return true if this event broker can broker for events of this type. There are no fixed criteria for this. Most implementions do event instanceof <EvenType associated with this broker>

Specified by:

canBrokerForEvent in class EventBroker

notifyEventListener

protected void notifyEventListener(Event event,
                                   EventListener listener)
                            throws ClassCastException

Description copied from class: EventBroker

This method has two functions. It must cast both event and listener to the proper type and invoke the event on the listener. But it must allso check if the listener has constraint properties set. if so it must use them to decide if the event should be invoked on this listener.

Specified by:

notifyEventListener in class EventBroker

Throws:

ClassCastException

toString

public String toString()

Specified by:

toString in class EventBroker