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	/*
	* Copyright (c) 1999, 2003, 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;



	/**
	* Provides definitions of the attribute change notifications sent by MBeans.
	* <P>
	* It's up to the MBean owning the attribute of interest to create and send
	* attribute change notifications when the attribute change occurs.
	* So the <CODE>NotificationBroadcaster</CODE> interface has to be implemented
	* by any MBean for which an attribute change is of interest.
	* <P>
	* Example:
	* If an MBean called <CODE>myMbean</CODE> needs to notify registered listeners
	* when its attribute:
	* <BLOCKQUOTE><CODE>
	* String myString
	* </CODE></BLOCKQUOTE>
	* is modified, <CODE>myMbean</CODE> creates and emits the following notification:
	* <BLOCKQUOTE><CODE>
	* new AttributeChangeNotification(myMbean, sequenceNumber, timeStamp, msg,
	* "myString", "String", oldValue, newValue);
	* </CODE></BLOCKQUOTE>
	*
	* @since 1.5
	*/
	public class AttributeChangeNotification extends javax.management.Notification {

	/* Serial version */
	private static final long serialVersionUID = 535176054565814134L;

	/**
	* Notification type which indicates that the observed MBean attribute value has changed.
	* <BR>The value of this type string is <CODE>jmx.attribute.change</CODE>.
	*/
	public static final String ATTRIBUTE_CHANGE = "jmx.attribute.change";


	/**
	* @serial The MBean attribute name.
	*/
	private String attributeName = null;

	/**
	* @serial The MBean attribute type.
	*/
	private String attributeType = null;

	/**
	* @serial The MBean attribute old value.
	*/
	private Object oldValue = null;

	/**
	* @serial The MBean attribute new value.
	*/
	private Object newValue = null;


	/**
	* Constructs an attribute change notification object.
	* In addition to the information common to all notification, the caller must supply the name and type
	* of the attribute, as well as its old and new values.
	*
	* @param source The notification producer, that is, the MBean the attribute belongs to.
	* @param sequenceNumber The notification sequence number within the source object.
	* @param timeStamp The date at which the notification is being sent.
	* @param msg A String containing the message of the notification.
	* @param attributeName A String giving the name of the attribute.
	* @param attributeType A String containing the type of the attribute.
	* @param oldValue An object representing value of the attribute before the change.
	* @param newValue An object representing value of the attribute after the change.
	*/
	public AttributeChangeNotification(Object source, long sequenceNumber, long timeStamp, String msg,
	String attributeName, String attributeType, Object oldValue, Object newValue) {

	super(AttributeChangeNotification.ATTRIBUTE_CHANGE, source, sequenceNumber, timeStamp, msg);
	this.attributeName = attributeName;
	this.attributeType = attributeType;
	this.oldValue = oldValue;
	this.newValue = newValue;
	}


	/**
	* Gets the name of the attribute which has changed.
	*
	* @return A String containing the name of the attribute.
	*/
	public String getAttributeName() {
	return attributeName;
	}

	/**
	* Gets the type of the attribute which has changed.
	*
	* @return A String containing the type of the attribute.
	*/
	public String getAttributeType() {
	return attributeType;
	}

	/**
	* Gets the old value of the attribute which has changed.
	*
	* @return An Object containing the old value of the attribute.
	*/
	public Object getOldValue() {
	return oldValue;
	}

	/**
	* Gets the new value of the attribute which has changed.
	*
	* @return An Object containing the new value of the attribute.
	*/
	public Object getNewValue() {
	return newValue;
	}

	}

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