--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.commands/src/org/eclipse/core/commands/common/AbstractNamedHandleEvent.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,83 @@
+/*******************************************************************************
+ * Copyright (c) 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+
+module org.eclipse.core.commands.common.AbstractNamedHandleEvent;
+
+import org.eclipse.core.commands.common.AbstractHandleObjectEvent;
+
+/**
+ * <p>
+ * An event fired from a <code>NamedHandleObject</code>. This provides
+ * notification of changes to the defined state, the name and the description.
+ * </p>
+ *
+ * @since 3.1
+ */
+public abstract class AbstractNamedHandleEvent :
+        AbstractHandleObjectEvent {
+
+    /**
+     * The bit used to represent whether the category has changed its
+     * description.
+     */
+    protected static const int CHANGED_DESCRIPTION = 1 << LAST_BIT_USED_ABSTRACT_HANDLE;
+
+    /**
+     * The bit used to represent whether the category has changed its name.
+     */
+    protected static const int CHANGED_NAME = 1 << LAST_BIT_USED_ABSTRACT_HANDLE;
+
+    /**
+     * The last used bit so that subclasses can add more properties.
+     */
+    protected static const int LAST_USED_BIT = CHANGED_NAME;
+
+    /**
+     * Constructs a new instance of <code>AbstractHandleObjectEvent</code>.
+     *
+     * @param definedChanged
+     *            <code>true</code>, iff the defined property changed.
+     * @param descriptionChanged
+     *            <code>true</code>, iff the description property changed.
+     * @param nameChanged
+     *            <code>true</code>, iff the name property changed.
+     */
+    protected this(bool definedChanged,
+            bool descriptionChanged, bool nameChanged) {
+        super(definedChanged);
+
+        if (descriptionChanged) {
+            changedValues |= CHANGED_DESCRIPTION;
+        }
+        if (nameChanged) {
+            changedValues |= CHANGED_NAME;
+        }
+    }
+
+    /**
+     * Returns whether or not the description property changed.
+     *
+     * @return <code>true</code>, iff the description property changed.
+     */
+    public final bool isDescriptionChanged() {
+        return ((changedValues & CHANGED_DESCRIPTION) !is 0);
+    }
+
+    /**
+     * Returns whether or not the name property changed.
+     *
+     * @return <code>true</code>, iff the name property changed.
+     */
+    public final bool isNameChanged() {
+        return ((changedValues & CHANGED_NAME) !is 0);
+    }
+
+}