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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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 *

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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 {@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.

     *<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.

     *<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.

     *<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);

}