--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/ObjectType.java	Tue Nov 18 16:18:45 2014 +0100
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.object;
+
+import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
+
+public class ObjectType {
+    /**
+     * Delegate method for {@link DynamicObject#equals(Object)}.
+     */
+    public boolean equals(DynamicObject object, Object other) {
+        return object == other;
+    }
+
+    /**
+     * Delegate method for {@link DynamicObject#hashCode()}.
+     */
+    public int hashCode(DynamicObject object) {
+        return System.identityHashCode(object);
+    }
+
+    /**
+     * Delegate method for {@link DynamicObject#toString()}.
+     */
+    @TruffleBoundary
+    public String toString(DynamicObject object) {
+        return "DynamicObject<" + this.toString() + ">@" + Integer.toHexString(hashCode(object));
+    }
+
+    /**
+     * Creates a data object to be associated with a newly created shape.
+     *
+     * @param shape the shape for which to create the data object
+     */
+    public Object createShapeData(Shape shape) {
+        return null;
+    }
+
+    /**
+     * Called when a new property is added to a shape.
+     *
+     * @param property the added property
+     * @param shapeBefore shape before the property was added
+     * @param shapeAfter shape after the property was added
+     */
+    public void onPropertyAdded(Property property, Shape shapeBefore, Shape shapeAfter) {
+    }
+}