1 /* 2 * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package javax.naming.event; 27 28 /** 29 * Specifies the methods that a listener interested in namespace changes 30 * must implement. 31 * Specifically, the listener is interested in <tt>NamingEvent</tt>s 32 * with event types of <tt>OBJECT_ADDED</TT>, <TT>OBJECT_RENAMED</TT>, or 33 * <TT>OBJECT_REMOVED</TT>. 34 *<p> 35 * Such a listener must: 36 *<ol> 37 *<li>Implement this interface and its methods. 38 *<li>Implement <tt>NamingListener.namingExceptionThrown()</tt> so that 39 * it will be notified of exceptions thrown while attempting to 40 * collect information about the events. 41 *<li>Register with the source using the source's <tt>addNamingListener()</tt> 42 * method. 43 *</ol> 44 * A listener that wants to be notified of <tt>OBJECT_CHANGED</tt> event types 45 * should also implement the <tt>ObjectChangeListener</tt> 46 * interface. 47 * 48 * @author Rosanna Lee 49 * @author Scott Seligman 50 * 51 * @see NamingEvent 52 * @see ObjectChangeListener 53 * @see EventContext 54 * @see EventDirContext 55 * @since 1.3 56 */ 57 public interface NamespaceChangeListener extends NamingListener { 58 59 /** 60 * Called when an object has been added. 61 *<p> 62 * The binding of the newly added object can be obtained using 63 * <tt>evt.getNewBinding()</tt>. 64 * @param evt The nonnull event. 65 * @see NamingEvent#OBJECT_ADDED 66 */ 67 void objectAdded(NamingEvent evt); 68 69 /** 70 * Called when an object has been removed. 71 *<p> 72 * The binding of the newly removed object can be obtained using 73 * <tt>evt.getOldBinding()</tt>. 74 * @param evt The nonnull event. 75 * @see NamingEvent#OBJECT_REMOVED 76 */ 77 void objectRemoved(NamingEvent evt); 78 79 /** 80 * Called when an object has been renamed. 81 *<p> 82 * The binding of the renamed object can be obtained using 83 * <tt>evt.getNewBinding()</tt>. Its old binding (before the rename) 84 * can be obtained using <tt>evt.getOldBinding()</tt>. 85 * One of these may be null if the old/new binding was outside the 86 * scope in which the listener has registered interest. 87 * @param evt The nonnull event. 88 * @see NamingEvent#OBJECT_RENAMED 89 */ 90 void objectRenamed(NamingEvent evt); 91 }