diff -r 000000000000 -r 373ffda63c9a src/share/jaxws_classes/com/sun/xml/internal/ws/client/ContentNegotiation.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/jaxws_classes/com/sun/xml/internal/ws/client/ContentNegotiation.java	Wed Apr 27 01:27:09 2016 +0800
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 1997, 2012, 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.ws.client;
+
+/**
+ * Content negotiation enum.
+ * <p>
+ * A value of {@link #none} means no content negotation at level of the
+ * client transport will be performed to negotiate the encoding of XML infoset.
+ * The default encoding will always be used.
+ * <p>
+ * A value of {@link #pessimistic} means the client transport will assume
+ * the default encoding of XML infoset for an outbound message unless informed
+ * otherwise by a previously received inbound message.
+ * (The client transport initially and pessimistically assumes that a service
+ * does not support anything other than the default encoding of XML infoset.)
+ * <p>
+ * A value of {@link #optimistic} means the client transport will assume
+ * a non-default encoding of XML infoset for an outbound message.
+ * (The client transport optimistically assumes that a service
+ * supports the non-default encoding of XML infoset.)
+ *
+ * @author Paul.Sandoz@Sun.Com
+ */
+public enum ContentNegotiation {
+    none,
+    pessimistic,
+    optimistic;
+
+    /**
+     * Property name for content negotiation on {@link RequestContext}.
+     */
+    public static final String PROPERTY = "com.sun.xml.internal.ws.client.ContentNegotiation";
+
+    /**
+     * Obtain the content negotiation value from a system property.
+     * <p>
+     * This method will never throw a runtime exception.
+     *
+     * @return the content negotiation value.
+     */
+    public static ContentNegotiation obtainFromSystemProperty() {
+        try {
+            String value = System.getProperty(PROPERTY);
+
+            if (value == null) {
+                return none;
+            }
+
+            return valueOf(value);
+        } catch (Exception e) {
+            // Default to none for any unrecognized value or any other
+            // runtime exception thrown
+            return none;
+        }
+    }
+}