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.
+ * <P>
+ * Manages a list of enabled notification types.
+ * A method allows users to enable/disable as many notification types as required.
+ * <P>
+ * 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.
+ * <P>
+ * Example:
+ * <BLOCKQUOTE>
+ * <PRE>
+ * NotificationFilterSupport myFilter = new NotificationFilterSupport();
+ * myFilter.enableType("my_example.my_type");
+ * myBroadcaster.addListener(myListener, myFilter, null);
+ * </PRE>
+ * </BLOCKQUOTE>
+ * The listener <CODE>myListener</CODE> 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 List<String> enabledTypes = new Vector<String>();
+
+
+ /**
+ * Invoked before sending the specified notification to the listener.
+ * <BR>This filter compares the type of the specified notification with each enabled type.
+ * If the notification type matches one of the enabled types,
+ * the notification should be sent to the listener and this method returns <CODE>true</CODE>.
+ *
+ * @param notification The notification to be sent.
+ * @return <CODE>true</CODE> if the notification should be sent to the listener, <CODE>false</CODE> 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.
+ * <BR>If the specified prefix is already in the list of enabled notification types,
+ * this method has no effect.
+ * <P>
+ * Example:
+ * <BLOCKQUOTE>
+ * <PRE>
+ * // 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");
+ * </PRE>
+ * </BLOCKQUOTE>
+ *
+ * Note that:
+ * <BLOCKQUOTE><CODE>
+ * myFilter.enableType("my_example.*");
+ * </CODE></BLOCKQUOTE>
+ * 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.
+ * <BR>If the specified prefix is not in the list of enabled notification types,
+ * this method has no effect.
+ *
+ * @param prefix The prefix.
+ */
+ public synchronized void disableType(String prefix) {
+ enabledTypes.remove(prefix);
+ }
+
+ /**
+ * Disables all notification types.
+ */
+ public synchronized void disableAllTypes() {
+ enabledTypes.clear();
+ }
+
+
+ /**
+ * Gets all the enabled notification types for this filter.
+ *
+ * @return The list containing all the enabled notification types.
+ */
+ public synchronized Vector<String> getEnabledTypes() {
+ return (Vector<String>)enabledTypes;
+ }
+
+}