--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/AbstractObservable.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright (c) 2006, 2008 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
+ *     Brad Reynolds - bug 164653
+ *     Matthew Hall - bug 118516
+ *******************************************************************************/
+
+module org.eclipse.core.databinding.observable.AbstractObservable;
+
+import java.lang.all;
+
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.core.runtime.AssertionFailedException;
+
+/**
+ * @since 1.0
+ */
+public abstract class AbstractObservable : ChangeManager , IObservable {
+    
+    /**
+     * @param realm
+     */
+    public this(Realm realm) {
+        super(realm);
+    }
+
+    public synchronized void addChangeListener(IChangeListener listener) {
+        addListener(ChangeEvent.TYPE, listener);
+    }
+
+    public synchronized void removeChangeListener(IChangeListener listener) {
+        removeListener(ChangeEvent.TYPE, listener);
+    }
+
+    public synchronized void addStaleListener(IStaleListener listener) {
+        addListener(StaleEvent.TYPE, listener);
+    }
+
+    public synchronized void removeStaleListener(IStaleListener listener) {
+        removeListener(StaleEvent.TYPE, listener);
+    }
+
+    protected void fireChange() {
+        checkRealm();
+        fireEvent(new ChangeEvent(this));
+    }
+
+    protected void fireStale() {
+        checkRealm();
+        fireEvent(new StaleEvent(this));
+    }
+
+    /**
+     * 
+     */
+    public synchronized void dispose() {
+        super.dispose();
+    }
+
+    /**
+     * Asserts that the realm is the current realm.
+     * 
+     * @see Realm#isCurrent()
+     * @throws AssertionFailedException if the realm is not the current realm
+     */
+    protected void checkRealm() {
+        Assert.isTrue(getRealm().isCurrent(),
+                "This operation must be run within the observable's realm"); //$NON-NLS-1$
+    }
+}