--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/LayoutStrategy.java	Wed Jun 17 10:58:08 2015 +0200
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2014, 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.
+ *
+ * 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.object;
+
+import com.oracle.truffle.api.object.*;
+import com.oracle.truffle.object.ShapeImpl.BaseAllocator;
+
+public interface LayoutStrategy {
+    boolean updateShape(DynamicObject object);
+
+    Shape returnCached(Shape newShape);
+
+    Shape ensureSpace(Shape shape, Location location);
+
+    boolean isAutoExtArray();
+
+    Property generalizeProperty(DynamicObject object, Property oldProperty, Object value);
+
+    Property generalizeProperty(DynamicObject object, Property oldProperty, Object value, Shape oldShape, Shape newShape);
+
+    BaseAllocator createAllocator(Layout shape);
+
+    BaseAllocator createAllocator(Shape shape);
+}