/*

 * Copyright (c) 2003, 2013, 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 javax.management.remote;

import java.io.IOException;

import java.io.InvalidObjectException;

import java.io.ObjectInputStream;

import java.io.Serializable;

import javax.management.Notification;

/**

 * <p>A (Notification, Listener ID) pair.</p>

 * <p>This class is used to associate an emitted notification

 *    with the listener ID to which it is targeted.</p>

 *

 * @since 1.5

 */

public class TargetedNotification implements Serializable {

    private static final long serialVersionUID = 7676132089779300926L;

// If we replace Integer with int...

//     /**

//      * <p>Constructs a <code>TargetedNotification</code> object.  The

//      * object contains a pair (Notification, Listener ID).

//      * The Listener ID identifies the client listener to which that

//      * notification is targeted. The client listener ID is one

//      * previously returned by the connector server in response to an

//      * <code>addNotificationListener</code> request.</p>

//      * @param notification Notification emitted from the MBean server.

//      * @param listenerID   The ID of the listener to which this

//      *        notification is targeted.

//      */

//     public TargetedNotification(Notification notification,

//                              int listenerID) {

//      this.notif = notification;

//      this.id = listenerID;

//     }

    /**

     * <p>Constructs a <code>TargetedNotification</code> object.  The

     * object contains a pair (Notification, Listener ID).

     * The Listener ID identifies the client listener to which that

     * notification is targeted. The client listener ID is one

     * previously returned by the connector server in response to an

     * <code>addNotificationListener</code> request.</p>

     * @param notification Notification emitted from the MBean server.

     * @param listenerID   The ID of the listener to which this

     *        notification is targeted.

     * @exception IllegalArgumentException if the <var>listenerID</var>

     *        or <var>notification</var> is null.

     */

    public TargetedNotification(Notification notification,

                                Integer listenerID) {

        validate(notification, listenerID);

        // If we replace integer with int...

        // this(notification,intValue(listenerID));

        this.notif = notification;

        this.id = listenerID;

    }

    /**

     * <p>The emitted notification.</p>

     *

     * @return The notification.

     */

    public Notification getNotification() {

        return notif;

    }

    /**

     * <p>The ID of the listener to which the notification is

     *    targeted.</p>

     *

     * @return The listener ID.

     */

    public Integer getListenerID() {

        return id;

    }

    /**

     * Returns a textual representation of this Targeted Notification.

     *

     * @return a String representation of this Targeted Notification.

     **/

    public String toString() {

        return "{" + notif + ", " + id + "}";

    }

    /**

     * @serial A notification to transmit to the other side.

     * @see #getNotification()

     **/

    private Notification notif;

    /**

     * @serial The ID of the listener to which the notification is

     *         targeted.

     * @see #getListenerID()

     **/

    private Integer id;

    //private final int id;

// Needed if we use int instead of Integer...

//     private static int intValue(Integer id) {

//      if (id == null) throw new

//          IllegalArgumentException("Invalid listener ID: null");

//      return id.intValue();

//     }

    private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {

        ois.defaultReadObject();

        try {

            validate(this.notif, this.id);

        } catch (IllegalArgumentException e) {

            throw new InvalidObjectException(e.getMessage());

        }

    }

    private static void validate(Notification notif, Integer id) throws IllegalArgumentException {

        if (notif == null) {

            throw new IllegalArgumentException("Invalid notification: null");

        }

        if (id == null) {

            throw new IllegalArgumentException("Invalid listener ID: null");

        }

    }

}