--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding/src/org/eclipse/core/databinding/observable/set/SetDiff.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.databinding.observable.set.SetDiff;
+
+import java.lang.all;
+
+import java.util.Set;
+
+/**
+ * @since 1.0
+ *
+ */
+public abstract class SetDiff {
+    
+    /**
+     * @return the set of added elements
+     */
+    public abstract Set getAdditions();
+    
+    /**
+     * @return the set of removed elements
+     */
+    public abstract Set getRemovals();
+    
+    /**
+     * @see java.lang.Object#toString()
+     */
+    public String toString() {
+        StringBuffer buffer = new StringBuffer();
+        buffer
+            .append(getClass().getName())
+            .append("{additions [") //$NON-NLS-1$
+            .append(getAdditions() !is null ? getAdditions().toString() : "null") //$NON-NLS-1$
+            .append("], removals [") //$NON-NLS-1$
+            .append(getRemovals() !is null ? getRemovals().toString() : "null") //$NON-NLS-1$
+            .append("]}"); //$NON-NLS-1$
+        
+        return buffer.toString();
+    }
+}