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 * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.

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

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * 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

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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package javax.naming.event;

/**

  * Specifies the method that a listener of a <tt>NamingEvent</tt>

  * with event type of <tt>OBJECT_CHANGED</tt> must implement.

  *<p>

  * An <tt>OBJECT_CHANGED</tt> event type is fired when (the contents of)

  * an object has changed. This might mean that its attributes have been modified,

  * added, or removed, and/or that the object itself has been replaced.

  * How the object has changed can be determined by examining the

  * <tt>NamingEvent</tt>'s old and new bindings.

  *<p>

  * A listener interested in <tt>OBJECT_CHANGED</tt> event types must:

  *<ol>

  *

  *<li>Implement this interface and its method (<tt>objectChanged()</tt>)

  *<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 namespace change events

  * should also implement the <tt>NamespaceChangeListener</tt>

  * interface.

  *

  * @author Rosanna Lee

  * @author Scott Seligman

  *

  * @see NamingEvent

  * @see NamespaceChangeListener

  * @see EventContext

  * @see EventDirContext

  * @since 1.3

  */

public interface ObjectChangeListener extends NamingListener {

    /**

     * Called when an object has been changed.

     *<p>

     * The binding of the changed object can be obtained using

     * <tt>evt.getNewBinding()</tt>. Its old binding (before the change)

     * can be obtained using <tt>evt.getOldBinding()</tt>.

     * @param evt The nonnull naming event.

     * @see NamingEvent#OBJECT_CHANGED

     */

    void objectChanged(NamingEvent evt);

}