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diff --git a/src/jdk/nashorn/internal/runtime/OptimisticBuiltins.java b/src/jdk/nashorn/internal/runtime/OptimisticBuiltins.java
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+/*
+ * Copyright (c) 2010, 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 jdk.nashorn.internal.runtime;
+
+import jdk.nashorn.internal.objects.annotations.SpecializedFunction;
+import jdk.nashorn.internal.objects.annotations.SpecializedFunction.LinkLogic;
+
+/**
+ * This is an interface for classes that need custom linkage logic. This means Native objects
+ * that contain optimistic native methods, that need special/extra rules for linking, guards and
+ * SwitchPointing, known and internal to the Native object for its linkage
+ */
+public interface OptimisticBuiltins {
+
+    /**
+     * Return an instance of the linking logic we need for a particular LinkLogic
+     * subclass, gotten from the compile time annotation of a specialized builtin method
+     * No assumptions can be made about the lifetime of the instance. The receiver may
+     * keep it as a perpetual final instance field or create new linking logic depending
+     * on its current state for each call, depending on if the global state has changed
+     * or other factors
+     *
+     * @param clazz linking logic class
+     * @return linking logic instance for this class
+     */
+    public SpecializedFunction.LinkLogic getLinkLogic(final Class<? extends LinkLogic> clazz);
+
+    /**
+     * Does this link logic vary depending on which instance we are working with.
+     * Then we have to sort out certain primitives, as they are created as new
+     * objects in the wrapFilter by JavaScript semantics. An example of instance only
+     * assumptions are switchPoints per instance, as in NativeArray. NativeString is
+     * fine, as it's only static.
+     *
+     * TODO: finer granularity on this, on the function level so certain functions
+     * are forbidden only. Currently we don't have enough specialization to bump into this
+     *
+     * @return true if there are per instance assumptions for the optimism
+     */
+    public boolean hasPerInstanceAssumptions();
+
+}