001    /* AttributeChangeNotification.java -- Notification for attribute changes
002       Copyright (C) 2007 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package javax.management;
040    
041    /**
042     * Defines the notification used to let listeners know of
043     * an attribute change.  The bean itself is responsible
044     * for creating and transmitting the notification when the
045     * attribute changes, by implementing
046     * {@link NotificationBroadcaster}.  For example, if a
047     * bean increments the integer, <code>count</code>, it
048     * should send a notification with the
049     * <code>attributeName</code>, <code>"count"</code>,
050     * the <code>attributeType</code>, <code>"Integer"</code>
051     * and the old and new values of the attribute.
052     *
053     * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
054     * @since 1.5
055     */
056    public class AttributeChangeNotification
057      extends Notification
058    {
059    
060      /**
061       * Compatible with JDK 1.5
062       */
063      private static final long serialVersionUID = 535176054565814134L;
064    
065      /**
066       * The attribute type for attribute change
067       * notifications.
068       */
069      public static final String ATTRIBUTE_CHANGE = "jmx.attribute.change";
070      
071      /**
072       * The name of the attribute that changed.
073       */
074      private String attributeName;
075    
076      /**
077       * The type of the attribute that changed.
078       */
079      private String attributeType;
080    
081      /**
082       * The old value of the attribute.
083       */
084      private Object oldValue;
085    
086      /**
087       * The new value of the attribute.
088       */
089      private Object newValue;
090    
091      /**
092       * Constructs a new {@link AttributeChangeNotification}
093       * with the specified source, sequence number, timestamp,
094       * message, and the attribute name, type, old value and
095       * new value.
096       *
097       * @param source the producer of the notification, which
098       *               is usually the bean that changed the
099       *               attribute.
100       * @param sequenceNumber the sequence number of the
101       *                       notification.
102       * @param timeStamp the date and time of the notification.
103       * @param msg the message content of the notification.
104       * @param name the name of the attribute.
105       * @param type the type of the attribute.
106       * @param oldVal the old value of the attribute.
107       * @param newVal the new value of the attribute.
108       */
109      public AttributeChangeNotification(Object source,
110                                         long sequenceNumber,
111                                         long timeStamp,
112                                         String msg, String name,
113                                         String type, Object oldVal,
114                                         Object newVal)
115      {
116        super(ATTRIBUTE_CHANGE, source, sequenceNumber,
117              timeStamp, msg);
118        attributeName = name;
119        attributeType = type;
120        oldValue = oldVal;
121        newValue = newVal;
122      }
123    
124      /**
125       * Returns the name of the attribute that changed.
126       *
127       * @return the name of the attribute.
128       */
129      public String getAttributeName()
130      {
131        return attributeName;
132      }
133    
134      /**
135       * Returns the type of the attribute that changed.
136       *
137       * @return the type of the attribute.
138       */
139      public String getAttributeType()
140      {
141        return attributeType;
142      }
143    
144      /**
145       * Returns the old value of the attribute.
146       *
147       * @return the old value.
148       */
149      public Object getOldValue()
150      {
151        return oldValue;
152      }
153    
154      /**
155       * Returns the new value of the attribute.
156       *
157       * @return the new value.
158       */
159      public Object getNewValue()
160      {
161        return newValue;
162      }
163    
164    }
165    
166