--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/list/ListDiffEntry.d	Tue Apr 21 10:55:51 2009 +0200
@@ -0,0 +1,53 @@
+/*******************************************************************************
+ * Copyright (c) 2006 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
+ ******************************************************************************/
+
+package org.eclipse.core.databinding.observable.list;
+
+/**
+ * A single addition of an element to a list or removal of an element from a list.
+ *  
+ * @since 1.0
+ */
+public abstract class ListDiffEntry {
+    
+    /**
+     * @return the 0-based position of the addition or removal
+     */
+    public abstract int getPosition();
+    
+    /**
+     * @return true if this represents an addition, false if this represents a removal
+     */
+    public abstract bool isAddition();
+    
+    /**
+     * @return the element that was added or removed
+     */
+    public abstract Object getElement();
+    
+    /**
+     * @see java.lang.Object#toString()
+     */
+    public String toString() {
+        StringBuffer buffer = new StringBuffer();
+        buffer
+            .append(this.getClass().getName())
+            .append("{position [") //$NON-NLS-1$
+            .append(getPosition())
+            .append("], isAddition [") //$NON-NLS-1$
+            .append(isAddition())
+            .append("], element [") //$NON-NLS-1$
+            .append(getElement() !is null ? getElement().toString() : "null") //$NON-NLS-1$
+            .append("]}"); //$NON-NLS-1$
+        
+        return buffer.toString();
+    }
+}