diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/java.management/share/classes/javax/management/NotificationFilterSupport.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/java.management/share/classes/javax/management/NotificationFilterSupport.java Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,163 @@ +/* + * 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.List; +import java.util.Vector; + +/** + * Provides an implementation of the {@link javax.management.NotificationFilter} interface. + * The filtering is performed on the notification type attribute. + *
+ * Manages a list of enabled notification types. + * A method allows users to enable/disable as many notification types as required. + *
+ * Then, before sending a notification to a listener registered with a filter, + * the notification broadcaster compares this notification type with all notification types + * enabled by the filter. The notification will be sent to the listener + * only if its filter enables this notification type. + *
+ * Example: + *
+ *+ * The listener+ * NotificationFilterSupport myFilter = new NotificationFilterSupport(); + * myFilter.enableType("my_example.my_type"); + * myBroadcaster.addListener(myListener, myFilter, null); + *+ *
myListener
will only receive notifications the type of which equals/starts with "my_example.my_type".
+ *
+ * @see javax.management.NotificationBroadcaster#addNotificationListener
+ *
+ * @since 1.5
+ */
+public class NotificationFilterSupport implements NotificationFilter {
+
+ /* Serial version */
+ private static final long serialVersionUID = 6579080007561786969L;
+
+ /**
+ * @serial {@link Vector} that contains the enabled notification types.
+ * The default value is an empty vector.
+ */
+ private Listtrue
.
+ *
+ * @param notification The notification to be sent.
+ * @return true
if the notification should be sent to the listener, false
otherwise.
+ */
+ public synchronized boolean isNotificationEnabled(Notification notification) {
+
+ String type = notification.getType();
+
+ if (type == null) {
+ return false;
+ }
+ try {
+ for (String prefix : enabledTypes) {
+ if (type.startsWith(prefix)) {
+ return true;
+ }
+ }
+ } catch (java.lang.NullPointerException e) {
+ // Should never occurs...
+ return false;
+ }
+ return false;
+ }
+
+ /**
+ * Enables all the notifications the type of which starts with the specified prefix
+ * to be sent to the listener.
+ * + * Example: + *
+ *+ * + * Note that: + *+ * // Enables all notifications the type of which starts with "my_example" to be sent. + * myFilter.enableType("my_example"); + * // Enables all notifications the type of which is "my_example.my_type" to be sent. + * myFilter.enableType("my_example.my_type"); + *+ *
+ * myFilter.enableType("my_example.*");
+ *
+ * will no match any notification type.
+ *
+ * @param prefix The prefix.
+ * @exception java.lang.IllegalArgumentException The prefix parameter is null.
+ */
+ public synchronized void enableType(String prefix)
+ throws IllegalArgumentException {
+
+ if (prefix == null) {
+ throw new IllegalArgumentException("The prefix cannot be null.");
+ }
+ if (!enabledTypes.contains(prefix)) {
+ enabledTypes.add(prefix);
+ }
+ }
+
+ /**
+ * Removes the given prefix from the prefix list.
+ *