--- /dev/null	2018-09-04 13:41:41.000000000 +0800
+++ new/test/jdk/com/sun/jndi/dns/FedTests/FedObjectFactory.java	2018-09-04 13:41:40.000000000 +0800
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2000, 2018, 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.
+ *
+ * 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.
+ */
+
+import javax.naming.Context;
+import javax.naming.Name;
+import javax.naming.spi.ObjectFactory;
+import java.util.Hashtable;
+
+/*
+ * This class is used to support dynamic nns, for testing federation of
+ * the DNS service provider.
+ */
+public class FedObjectFactory implements ObjectFactory {
+    @Override
+    public Object getObjectInstance(Object obj, Name name, Context nameCtx,
+            Hashtable<?, ?> environment) {
+        if (name != null && name.get(name.size() - 1).equals("")) {
+            System.out.println("got nns name");
+            return FedSubordinateNs.getRoot();
+        }
+        return null;
+    }
+}