/* * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.nio.sctp; /** * Notification emitted when an association has either opened or closed. * * @since 1.7 */public abstract class AssociationChangeNotification    implements Notification{    /**     * Defines the type of change event that happened to the association.     *     * @since 1.7     */    public enum AssocChangeEvent    {        /**         * A new association is now ready and data may be exchanged with this peer.         */        COMM_UP,         /**         * The association has failed. A series of SCTP send failed notifications         * will follow this notification, one for each outstanding message.         */       COMM_LOST,         /**         * SCTP has detected that the peer has restarted.         */       RESTART,         /**         * The association has gracefully closed.         */       SHUTDOWN,         /**         * The association failed to setup. If a message was sent on a {@link         * SctpMultiChannel} in non-blocking mode, an         * SCTP send failed notification will follow this notification for the         * outstanding message.         */       CANT_START    }     /**     * Initializes a new instance of this class.     */    protected AssociationChangeNotification() {}     /**     * Returns the association that this notification is applicable to.     *     * @return  The association whose state has changed, or {@code null} if     *          there is no association, that is {@linkplain     *          AssocChangeEvent#CANT_START CANT_START}     */    public abstract Association association();     /**     * Returns the type of change event.     *     * @return  The event     */    public abstract AssocChangeEvent event();}