javax.naming.event

## Interface NamespaceChangeListener

- All Superinterfaces:
    EventListener, NamingListener

      public interface NamespaceChangeListener
      extends NamingListener

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

  Such a listener must:

  1. Implement this interface and its methods.
  2. Implement `NamingListener.namingExceptionThrown()` so that it will be notified of exceptions thrown while attempting to collect information about the events.
  3. 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.
  Since:
    1.3
  See Also:
    `NamingEvent`, `ObjectChangeListener`, `EventContext`, `EventDirContext`

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `objectAdded(NamingEvent evt)` Called when an object has been added.
    `void` | `objectRemoved(NamingEvent evt)` Called when an object has been removed.
    `void` | `objectRenamed(NamingEvent evt)` Called when an object has been renamed.

    - ### Methods inherited from interface javax.naming.event.NamingListener

      `namingExceptionThrown`

- - ### Method Detail

    - #### objectAdded

          void objectAdded(NamingEvent evt)

      Called when an object has been added.

      The binding of the newly added object can be obtained using `evt.getNewBinding()`.

      Parameters:
        `evt` - The nonnull event.
      See Also:
        `NamingEvent.OBJECT_ADDED`

    - #### objectRemoved

          void objectRemoved(NamingEvent evt)

      Called when an object has been removed.

      The binding of the newly removed object can be obtained using `evt.getOldBinding()`.

      Parameters:
        `evt` - The nonnull event.
      See Also:
        `NamingEvent.OBJECT_REMOVED`

    - #### objectRenamed

          void objectRenamed(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.

      Parameters:
        `evt` - The nonnull event.
      See Also:
        `NamingEvent.OBJECT_RENAMED`

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