diff -r 88b85470e72c -r f50545b5e2f1 src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/property/UnmarshallerChain.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/jaxws_classes/com/sun/xml/internal/bind/v2/runtime/property/UnmarshallerChain.java	Tue Mar 06 16:09:35 2012 -0800
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 1997, 2011, 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.sun.xml.internal.bind.v2.runtime.property;
+
+import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;
+import com.sun.xml.internal.bind.v2.runtime.unmarshaller.Scope;
+
+
+/**
+ * Pass around a 'ticket dispenser' when creating new
+ * unmarshallers. This controls the index of the slot
+ * allocated to the chain of handlers.
+
+ *
+ * <p>
+ * A ticket dispenser also maintains the offset for handlers
+ * to access state slots. A handler records this value when it's created.
+ *
+ *
+ */
+public final class UnmarshallerChain {
+    /**
+     * This offset allows child unmarshallers to have its own {@link Scope} without colliding with siblings.
+     */
+    private int offset = 0;
+
+    public final JAXBContextImpl context;
+
+    public UnmarshallerChain(JAXBContextImpl context) {
+        this.context = context;
+    }
+
+    /**
+     * Allocates a new {@link Scope} offset.
+     */
+    public int allocateOffset() {
+        return offset++;
+    }
+
+    /**
+     * Gets the number of total scope offset allocated.
+     */
+    public int getScopeSize() {
+        return offset;
+    }
+}