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package javax.naming.event;

Specifies the methods that a listener interested in namespace changes must implement. Specifically, the listener is interested in NamingEvents with event types of OBJECT_ADDED, OBJECT_RENAMED, or OBJECT_REMOVED. 

Such a listener must:

Implement this interface and its methods.
Implement NamingListener.namingExceptionThrown() so that it will be notified of exceptions thrown while attempting to collect information about the events. 
Register with the source using the source's addNamingListener() method. 
 A listener that wants to be notified of OBJECT_CHANGED event types should also implement the ObjectChangeListener interface. 
Author:
Rosanna Lee, Scott Seligman
See Also:
NamingEvent
ObjectChangeListener
EventContext
EventDirContext
Since:
1.3/**
  * Specifies the methods that a listener interested in namespace changes
  * must implement.
  * Specifically, the listener is interested in {@code NamingEvent}s
  * with event types of {@code OBJECT_ADDED, OBJECT_RENAMED}, or
  * {@code OBJECT_REMOVED}.
  *<p>
  * Such a listener must:
  *<ol>
  *<li>Implement this interface and its methods.
  *<li>Implement {@code NamingListener.namingExceptionThrown()} so that
  * it will be notified of exceptions thrown while attempting to
  * collect information about the events.
  *<li>Register with the source using the source's {@code addNamingListener()}
  *    method.
  *</ol>
  * A listener that wants to be notified of {@code OBJECT_CHANGED} event types
  * should also implement the {@code ObjectChangeListener}
  * interface.
  *
  * @author Rosanna Lee
  * @author Scott Seligman
  *
  * @see NamingEvent
  * @see ObjectChangeListener
  * @see EventContext
  * @see EventDirContext
  * @since 1.3
  */
public interface NamespaceChangeListener extends NamingListener {

    
Called when an object has been added.
 The binding of the newly added object can be obtained using evt.getNewBinding(). 
Params:
evt – The nonnull event.
See Also:
NamingEvent.OBJECT_ADDED/**
     * Called when an object has been added.
     *<p>
     * The binding of the newly added object can be obtained using
     * {@code evt.getNewBinding()}.
     * @param evt The nonnull event.
     * @see NamingEvent#OBJECT_ADDED
     */
    void objectAdded(NamingEvent evt);

    
Called when an object has been removed.
 The binding of the newly removed object can be obtained using evt.getOldBinding(). 
Params:
evt – The nonnull event.
See Also:
NamingEvent.OBJECT_REMOVED/**
     * Called when an object has been removed.
     *<p>
     * The binding of the newly removed object can be obtained using
     * {@code evt.getOldBinding()}.
     * @param evt The nonnull event.
     * @see NamingEvent#OBJECT_REMOVED
     */
    void objectRemoved(NamingEvent evt);

    
Called when an object has been renamed.
 The binding of the renamed object can be obtained using evt.getNewBinding(). Its old binding (before the rename) can be obtained using evt.getOldBinding(). One of these may be null if the old/new binding was outside the scope in which the listener has registered interest. 
Params:
evt – The nonnull event.
See Also:
NamingEvent.OBJECT_RENAMED/**
     * Called when an object has been renamed.
     *<p>
     * The binding of the renamed object can be obtained using
     * {@code evt.getNewBinding()}. Its old binding (before the rename)
     * can be obtained using {@code evt.getOldBinding()}.
     * One of these may be null if the old/new binding was outside the
     * scope in which the listener has registered interest.
     * @param evt The nonnull event.
     * @see NamingEvent#OBJECT_RENAMED
     */
    void objectRenamed(NamingEvent evt);
}