--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/ObservableEvent.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2007 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.databinding.observable.ObservableEvent;
+
+import java.lang.all;
+
+import java.util.EventObject;
+
+/**
+ * Abstract event object for events fired by {@link IObservable} objects. All
+ * events fired by observables must be derived from this class so that the way
+ * of dispatching events can be improved in later versions of the framework.
+ * 
+ * @since 1.0
+ * 
+ */
+public abstract class ObservableEvent : EventObject {
+
+    /**
+     * Creates a new observable event.
+     * 
+     * @param source
+     */
+    public this(IObservable source) {
+        super(source);
+    }
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 7693906965267871813L;
+
+    /**
+     * Returns the observable that generated this event.
+     * 
+     * @return the observable that generated this event
+     */
+    public IObservable getObservable() {
+        return cast(IObservable) getSource();
+    }
+
+    /**
+     * Dispatch this event to the given listener. Subclasses must implement this
+     * method by calling the appropriate type-safe event handling method on the
+     * given listener according to the type of this event.
+     * 
+     * @param listener
+     *            the listener that should handle the event
+     */
+    protected abstract void dispatch(IObservablesListener listener);
+
+    /**
+     * Returns a unique object used for distinguishing this event type from
+     * others.
+     * 
+     * @return a unique object representing the concrete type of this event.
+     */
+    protected abstract Object getListenerType();
+
+}