--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api.object/src/com/oracle/truffle/api/object/BaseLocation.java	Tue Nov 18 16:18:45 2014 +0100
@@ -0,0 +1,69 @@
+/*
+ * 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;
+
+public interface BaseLocation {
+    /**
+     * Get object value as object at this location in store.
+     *
+     * @param shape the current shape of the object, which must contain this location
+     */
+    Object get(DynamicObject store, Shape shape);
+
+    /**
+     * Get object value as object at this location in store. For internal use only and subject to
+     * change, use {@link #get(DynamicObject, Shape)} instead.
+     *
+     * @param condition the result of a shape check or {@code false}
+     * @see #get(DynamicObject, Shape)
+     */
+    Object get(DynamicObject store, boolean condition);
+
+    /**
+     * Set object value at this location in store.
+     *
+     * @throws IncompatibleLocationException for storage type invalidations
+     * @throws FinalLocationException for effectively final fields
+     */
+    void set(DynamicObject store, Object value) throws IncompatibleLocationException, FinalLocationException;
+
+    /**
+     * Set object value at this location in store.
+     *
+     * @param shape the current shape of the storage object
+     * @throws IncompatibleLocationException for storage type invalidations
+     * @throws FinalLocationException for effectively final fields
+     */
+    void set(DynamicObject store, Object value, Shape shape) throws IncompatibleLocationException, FinalLocationException;
+
+    /**
+     * Set object value at this location in store and update shape.
+     *
+     * @param oldShape the shape before the transition
+     * @param newShape new shape after the transition
+     * @throws IncompatibleLocationException if value is of non-assignable type
+     */
+    void set(DynamicObject store, Object value, Shape oldShape, Shape newShape) throws IncompatibleLocationException;
+}