--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.runtime/src/com/oracle/truffle/ruby/runtime/objects/StorageLocation.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.runtime.objects;
+
+/**
+ * A storage location that abstracts the method for reading and writing values.
+ */
+public abstract class StorageLocation {
+
+    private ObjectLayout objectLayout;
+
+    protected StorageLocation(ObjectLayout objectLayout) {
+        this.objectLayout = objectLayout;
+    }
+
+    public abstract boolean isSet(RubyBasicObject object);
+
+    public abstract Object read(RubyBasicObject object, boolean condition);
+
+    public abstract void write(RubyBasicObject object, Object value) throws GeneralizeStorageLocationException;
+
+    public abstract Class getStoredClass();
+
+    public ObjectLayout getObjectLayout() {
+        return objectLayout;
+    }
+
+}