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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 <tt>NamingEvent</tt>s
  * with event types of <tt>OBJECT_ADDED</TT>, <TT>OBJECT_RENAMED</TT>, or
  * <TT>OBJECT_REMOVED</TT>.
  *<p>
  * Such a listener must:
  *<ol>
  *<li>Implement this interface and its methods.
  *<li>Implement <tt>NamingListener.namingExceptionThrown()</tt> 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 <tt>addNamingListener()</tt>
  *    method.
  *</ol>
  * A listener that wants to be notified of <tt>OBJECT_CHANGED</tt> event types
  * should also implement the <tt>ObjectChangeListener</tt>
  * 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
     * <tt>evt.getNewBinding()</tt>.
     * @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
     * <tt>evt.getOldBinding()</tt>.
     * @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
     * <tt>evt.getNewBinding()</tt>. Its old binding (before the rename)
     * can be obtained using <tt>evt.getOldBinding()</tt>.
     * 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);
}