org.mmbase.core.event
Class RelationEvent

java.lang.Object
  org.mmbase.core.event.Event
      org.mmbase.core.event.RelationEvent

All Implemented Interfaces:

Serializable, Cloneable, PublicCloneable<Event>

public class RelationEvent
extends Event
implements Serializable, Cloneable

This class reflects a ,,change relation event. it contains information about the kind of event (new, delete, change), and it contains a reference to the appropriate typerel node, which allows you to find out on which relation from which builder to which builder, the event occered. This is usefull for caching optimization.
A relation changed event is called the twoo nodes that the relation links (or used to).

Since:

MMBase-1.8

Version:

$Id: RelationEvent.java 41943 2010-04-16 17:18:19Z michiel $

Author:

Ernst Bunders

See Also:

Serialized Form

Field Summary

Fields inherited from class org.mmbase.core.event.Event

eventType, machine, TYPE_CHANGE, TYPE_DELETE, TYPE_NEW, TYPE_UNSPECIFIED

Constructor Summary

RelationEvent(NodeEvent nodeEvent, int relationSourceNumber, int relationDestinationNumber, String relationSourceType, String relationDestinationType, int role)
Constructor for relation event

Method Summary

boolean	equals(Object o)
NodeEvent	getNodeEvent()
int	getRelationDestinationNumber()
String	getRelationDestinationType()
int	getRelationSourceNumber()
String	getRelationSourceType()
int	getRole()
int	getType() Most events will come in certain 'types', default contants which are provided are Event.TYPE_NEW, Event.TYPE_CHANGE and Event.TYPE_DELETE.
int	hashCode()
String	toString()

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

clone, getMachine, isLocal

Methods inherited from class java.lang.Object

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

Constructor Detail

RelationEvent

public RelationEvent(NodeEvent nodeEvent,
                     int relationSourceNumber,
                     int relationDestinationNumber,
                     String relationSourceType,
                     String relationDestinationType,
                     int role)

Constructor for relation event

Parameters:

nodeEvent -

relationSourceNumber - the nodenumber of the 'soucre' node

relationDestinationNumber - the nodenumber of the 'destination' node

relationSourceType - the builder name of the 'source' node

relationDestinationType - the builder name of the 'destination' node

role - the nodenumber of the reldef node

Method Detail

getRelationSourceType

public String getRelationSourceType()

Returns:

Returns the relationSourceType.

getRelationDestinationType

public String getRelationDestinationType()

Returns:

Returns the relationDestinationType.

getRelationSourceNumber

public int getRelationSourceNumber()

Returns:

Returns the relationSourceNumber.

getRelationDestinationNumber

public int getRelationDestinationNumber()

Returns:

Returns the relationDestinationNumber.

getType

public int getType()

Description copied from class: Event

Most events will come in certain 'types', default contants which are provided are Event.TYPE_NEW, Event.TYPE_CHANGE and Event.TYPE_DELETE.

Overrides:

getType in class Event

getRole

public int getRole()

Returns:

the role number

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

getNodeEvent

public NodeEvent getNodeEvent()

toString

public String toString()

Overrides:

toString in class Object