--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/observable/tree/IViewerUpdate.d	Tue Apr 14 11:35:29 2009 +0200
@@ -0,0 +1,49 @@
+/*******************************************************************************
+ * 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.internal.databinding.observable.tree.IViewerUpdate;
+
+import java.lang.all;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+
+/**
+ * A context sensitive viewer update request.
+ * 
+ * @since 3.3
+ */
+public interface IViewerUpdate : IProgressMonitor {
+
+    /**
+     * Sets the status of this request, possibly <code>null</code>.
+     * When a request fails, the status indicates why the request failed.
+     * A <code>null</code> status is considered to be successful.
+     * 
+     * @param status request status
+     */
+    public void setStatus(IStatus status);
+    
+    /**
+     * Returns the status of this request, or <code>null</code>.
+     * 
+     * @return request status or <code>null</code>
+     */
+    public IStatus getStatus(); 
+    
+    /**
+     * Returns the model element corresponding to the given tree path.
+     * Returns the root element for the empty path.
+     * 
+     * @param path viewer tree path
+     * @return corresponding model element
+     */
+    public Object getElement(TreePath path);
+}