java.beans.beancontext
Class BeanContextMembershipEvent
- java.lang.Object
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- java.util.EventObject
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- java.beans.beancontext.BeanContextEvent
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- java.beans.beancontext.BeanContextMembershipEvent
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- All Implemented Interfaces:
- Serializable
public class BeanContextMembershipEvent extends BeanContextEvent
ABeanContextMembershipEventencapsulates the list of children added to, or removed from, the membership of a particularBeanContext. An instance of this event is fired whenever a successful add(), remove(), retainAll(), removeAll(), or clear() is invoked on a givenBeanContextinstance. Objects interested in receiving events of this type must implement theBeanContextMembershipListenerinterface, and must register their intent via theBeanContext'saddBeanContextMembershipListener(BeanContextMembershipListener bcml)method.- Since:
- 1.2
- See Also:
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BeanContext,BeanContextEvent,BeanContextMembershipListener, Serialized Form
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Field Summary
Fields Modifier and Type Field and Description protected CollectionchildrenThe list of children affected by this event notification.-
Fields inherited from class java.beans.beancontext.BeanContextEvent
propagatedFrom
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Fields inherited from class java.util.EventObject
source
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Constructor Summary
Constructors Constructor and Description BeanContextMembershipEvent(BeanContext bc, Collection changes)Contruct a BeanContextMembershipEventBeanContextMembershipEvent(BeanContext bc, Object[] changes)Contruct a BeanContextMembershipEvent
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description booleancontains(Object child)Is the child specified affected by the event?Iteratoriterator()Gets the array of children affected by this event.intsize()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
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Methods inherited from class java.util.EventObject
getSource, toString
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Field Detail
children
protected Collection children
The list of children affected by this event notification.
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Constructor Detail
BeanContextMembershipEvent
public BeanContextMembershipEvent(BeanContext bc, Collection changes)
Contruct a BeanContextMembershipEvent- Parameters:
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bc- The BeanContext source -
changes- The Children affected - Throws:
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NullPointerException- ifchangesisnull
BeanContextMembershipEvent
public BeanContextMembershipEvent(BeanContext bc, Object[] changes)
Contruct a BeanContextMembershipEvent- Parameters:
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bc- The BeanContext source -
changes- The Children effected - Throws:
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NullPointerException- if changes associated with this event are null.
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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:
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child- the object to check for being affected - Returns:
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trueif affected,falseif 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
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