| /* |
| * Copyright (c) 1999, 2006, 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; |
| |
| |
| import java.util.Vector; |
| |
| |
| /** |
| * This class implements of the {@link javax.management.NotificationFilter NotificationFilter} |
| * interface for the {@link javax.management.AttributeChangeNotification attribute change notification}. |
| * The filtering is performed on the name of the observed attribute. |
| * <P> |
| * It manages a list of enabled attribute names. |
| * A method allows users to enable/disable as many attribute names as required. |
| * |
| * @since 1.5 |
| */ |
| public class AttributeChangeNotificationFilter implements NotificationFilter { |
| |
| /* Serial version */ |
| private static final long serialVersionUID = -6347317584796410029L; |
| |
| /** |
| * @serial {@link Vector} that contains the enabled attribute names. |
| * The default value is an empty vector. |
| */ |
| private Vector<String> enabledAttributes = new Vector<String>(); |
| |
| |
| /** |
| * Invoked before sending the specified notification to the listener. |
| * <BR>This filter compares the attribute name of the specified attribute change notification |
| * with each enabled attribute name. |
| * If the attribute name equals one of the enabled attribute names, |
| * the notification must be sent to the listener and this method returns <CODE>true</CODE>. |
| * |
| * @param notification The attribute change notification to be sent. |
| * @return <CODE>true</CODE> if the notification has to be sent to the listener, <CODE>false</CODE> otherwise. |
| */ |
| public synchronized boolean isNotificationEnabled(Notification notification) { |
| |
| String type = notification.getType(); |
| |
| if ((type == null) || |
| (type.equals(AttributeChangeNotification.ATTRIBUTE_CHANGE) == false) || |
| (!(notification instanceof AttributeChangeNotification))) { |
| return false; |
| } |
| |
| String attributeName = |
| ((AttributeChangeNotification)notification).getAttributeName(); |
| return enabledAttributes.contains(attributeName); |
| } |
| |
| /** |
| * Enables all the attribute change notifications the attribute name of which equals |
| * the specified name to be sent to the listener. |
| * <BR>If the specified name is already in the list of enabled attribute names, |
| * this method has no effect. |
| * |
| * @param name The attribute name. |
| * @exception java.lang.IllegalArgumentException The attribute name parameter is null. |
| */ |
| public synchronized void enableAttribute(String name) throws java.lang.IllegalArgumentException { |
| |
| if (name == null) { |
| throw new java.lang.IllegalArgumentException("The name cannot be null."); |
| } |
| if (!enabledAttributes.contains(name)) { |
| enabledAttributes.addElement(name); |
| } |
| } |
| |
| /** |
| * Disables all the attribute change notifications the attribute name of which equals |
| * the specified attribute name to be sent to the listener. |
| * <BR>If the specified name is not in the list of enabled attribute names, |
| * this method has no effect. |
| * |
| * @param name The attribute name. |
| */ |
| public synchronized void disableAttribute(String name) { |
| enabledAttributes.removeElement(name); |
| } |
| |
| /** |
| * Disables all the attribute names. |
| */ |
| public synchronized void disableAllAttributes() { |
| enabledAttributes.removeAllElements(); |
| } |
| |
| /** |
| * Gets all the enabled attribute names for this filter. |
| * |
| * @return The list containing all the enabled attribute names. |
| */ |
| public synchronized Vector<String> getEnabledAttributes() { |
| return enabledAttributes; |
| } |
| |
| } |