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author | Andrew John Hughes <gnu_andrew@member.fsf.org> | 2007-01-14 00:45:57 +0000 |
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committer | Andrew John Hughes <gnu_andrew@member.fsf.org> | 2007-01-14 00:45:57 +0000 |
commit | 7cf009d0eead2a6a04371b4a92e8fcaa006d7047 (patch) | |
tree | 28595055218048733e10a6947c947e84ecc35f6a /javax | |
parent | f1dae3fa80ca0be7f5db7a4344f3cf19d28ff211 (diff) | |
download | classpath-7cf009d0eead2a6a04371b4a92e8fcaa006d7047.tar.gz |
2007-01-14 Andrew John Hughes <gnu_andrew@member.fsf.org>
* javax/management/AttributeChangeNotificationFilter.java:
New file.
Diffstat (limited to 'javax')
-rw-r--r-- | javax/management/AttributeChangeNotificationFilter.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/javax/management/AttributeChangeNotificationFilter.java b/javax/management/AttributeChangeNotificationFilter.java new file mode 100644 index 000000000..e1494021f --- /dev/null +++ b/javax/management/AttributeChangeNotificationFilter.java @@ -0,0 +1,137 @@ +/* AttributeChangeNotificationFilter.java -- Filter on attribute name + Copyright (C) 2007 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package javax.management; + +import java.io.Serializable; + +import java.util.Vector; + +/** + * Performs filtering of {@link AttributeChangeNotification}s + * based on a list of attribute names. + * + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @since 1.5 + */ +public class AttributeChangeNotificationFilter + implements NotificationFilter, Serializable +{ + + /** + * Compatible with JDK 1.5 + */ + private static final long serialVersionUID = -6347317584796410029L; + + /** + * Lists the names of the attributes that may pass + * through the filter. + */ + private final Vector<String> enabledAttributes = new Vector<String>(); + + /** + * Blocks all {@link AttributeChangeNotification}s + * by emptying the list of enabled attributes. + */ + public void disableAllAttributes() + { + enabledAttributes.clear(); + } + + /** + * Removes the specified attribute name from the list + * of enabled attributes, thus preventing + * {@link AttributeChangeNotification}s for this attribute + * from passing through the filter. If the attribute is + * not enabled, this has no effect. + * + * @param name the name of the attribute to disable. + */ + public void disableAttribute(String name) + { + enabledAttributes.remove(name); + } + + /** + * Adds the specified attribute name to the list + * of enabled attributes, thus allowing + * {@link AttributeChangeNotification}s for this attribute + * to pass through the filter. If the attribute is + * enabled, this has no effect. + * + * @param name the name of the attribute to disable. + */ + public void enableAttribute(String name) + { + if (!enabledAttributes.contains(name)) + enabledAttributes.add(name); + } + + /** + * Returns the list of enabled attributes for this + * filter. + * + * @return the list of enabled attributes. + */ + public Vector<String> getEnabledAttributes() + { + return enabledAttributes; + } + + /** + * Returns true if the specified notification is an + * {@link AttributeChangeNotification} and the name of the + * attribute concerned is in the list of enabled attributes + * for this filter. + * + * @param notif the notification being filtered. + * @return true if the notification is an + * {@link AttributeChangeNotification} for an + * enabled attribute. + */ + public boolean isNotificationEnabled(Notification notif) + { + if (notif instanceof AttributeChangeNotification) + { + AttributeChangeNotification n = + (AttributeChangeNotification) notif; + return enabledAttributes.contains(n.getAttributeName()); + } + return false; + } + +} |