java.beans.beancontext

Class BeanContextMembershipEvent

java.lang.Object

java.util.EventObject

java.beans.beancontext.BeanContextEvent

java.beans.beancontext.BeanContextMembershipEvent

All Implemented Interfaces:

Serializable

public class BeanContextMembershipEvent
extends BeanContextEvent

A BeanContextMembershipEvent encapsulates the list of children added to, or removed from, the membership of a particular BeanContext. An instance of this event is fired whenever a successful add(), remove(), retainAll(), removeAll(), or clear() is invoked on a given BeanContext instance. Objects interested in receiving events of this type must implement the BeanContextMembershipListener interface, and must register their intent via the BeanContext's addBeanContextMembershipListener(BeanContextMembershipListener bcml) method.

Since:

1.2

See Also:

BeanContext, BeanContextEvent, BeanContextMembershipListener, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Collection	children The list of children affected by this event notification.

Fields inherited from class java.beans.beancontext.BeanContextEvent

propagatedFrom

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor and Description
BeanContextMembershipEvent(BeanContext bc, Collection changes) Contruct a BeanContextMembershipEvent
BeanContextMembershipEvent(BeanContext bc, Object[] changes) Contruct a BeanContextMembershipEvent

Method Summary

Modifier and Type	Method and Description
boolean	contains(Object child) Is the child specified affected by the event?
Iterator	iterator() Gets the array of children affected by this event.
int	size() Gets the number of children affected by the notification.
Object[]	toArray() Gets the array of children affected by this event.

Methods inherited from class java.beans.beancontext.BeanContextEvent

getBeanContext, getPropagatedFrom, isPropagated, setPropagatedFrom

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Field Detail

children

protected Collection children

The list of children affected by this event notification.

Constructor Detail

BeanContextMembershipEvent

public BeanContextMembershipEvent(BeanContext bc,
                                  Collection changes)

Contruct a BeanContextMembershipEvent

Parameters:

bc - The BeanContext source

changes - The Children affected

Throws:

NullPointerException - if changes is null

BeanContextMembershipEvent

public BeanContextMembershipEvent(BeanContext bc,
                                  Object[] changes)

Contruct a BeanContextMembershipEvent

Parameters:

bc - The BeanContext source

changes - The Children effected

Throws:

NullPointerException - if changes associated with this event are null.

Method Detail

size

public int size()

Gets the number of children affected by the notification.

Returns:

the number of children affected by the notification

contains

public boolean contains(Object child)

Is the child specified affected by the event?

Parameters:

child - the object to check for being affected

Returns:

true if affected, false if not

toArray

public Object[] toArray()

Gets the array of children affected by this event.

Returns:

the array of children affected

iterator

public Iterator iterator()

Gets the array of children affected by this event.

Returns:

the array of children effected