--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.naming/share/classes/javax/naming/LinkRef.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 1999, 2004, 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 javax.naming;
+
+/**
+  * This class represents a Reference whose contents is a name, called the link name,
+  * that is bound to an atomic name in a context.
+  *<p>
+  * The name is a URL, or a name to be resolved relative to the initial
+  * context, or if the first character of the name is ".", the name
+  * is relative to the context in which the link is bound.
+  *<p>
+  * Normal resolution of names in context operations always follow links.
+  * Resolution of the link name itself may cause resolution to pass through
+  * other  links. This gives rise to the possibility of a cycle of links whose
+  * resolution could not terminate normally. As a simple means to avoid such
+  * non-terminating resolutions, service providers may define limits on the
+  * number of links that may be involved in any single operation invoked
+  * by the caller.
+  *<p>
+  * A LinkRef contains a single StringRefAddr, whose type is "LinkAddress",
+  * and whose contents is the link name. The class name field of the
+  * Reference is that of this (LinkRef) class.
+  *<p>
+  * LinkRef is bound to a name using the normal Context.bind()/rebind(), and
+  * DirContext.bind()/rebind(). Context.lookupLink() is used to retrieve the link
+  * itself if the terminal atomic name is bound to a link.
+  *<p>
+  * Many naming systems support a native notion of link that may be used
+  * within the naming system itself. JNDI does not specify whether
+  * there is any relationship between such native links and JNDI links.
+  *<p>
+  * A LinkRef instance is not synchronized against concurrent access by multiple
+  * threads. Threads that need to access a LinkRef instance concurrently should
+  * synchronize amongst themselves and provide the necessary locking.
+  *
+  * @author Rosanna Lee
+  * @author Scott Seligman
+  *
+  * @see LinkException
+  * @see LinkLoopException
+  * @see MalformedLinkException
+  * @see Context#lookupLink
+  * @since 1.3
+  */
+
+  /*<p>
+  * The serialized form of a LinkRef object consists of the serialized
+  * fields of its Reference superclass.
+  */
+
+public class LinkRef extends Reference {
+    /* code for link handling */
+    static final String linkClassName = LinkRef.class.getName();
+    static final String linkAddrType = "LinkAddress";
+
+    /**
+      * Constructs a LinkRef for a name.
+      * @param linkName The non-null name for which to create this link.
+      */
+    public LinkRef(Name linkName) {
+        super(linkClassName, new StringRefAddr(linkAddrType, linkName.toString()));
+    }
+
+    /**
+      * Constructs a LinkRef for a string name.
+      * @param linkName The non-null name for which to create this link.
+      */
+    public LinkRef(String linkName) {
+        super(linkClassName, new StringRefAddr(linkAddrType, linkName));
+    }
+
+    /**
+      * Retrieves the name of this link.
+      *
+      * @return The non-null name of this link.
+      * @exception MalformedLinkException If a link name could not be extracted
+      * @exception NamingException If a naming exception was encountered.
+      */
+    public String getLinkName() throws NamingException {
+        if (className != null && className.equals(linkClassName)) {
+            RefAddr addr = get(linkAddrType);
+            if (addr != null && addr instanceof StringRefAddr) {
+                return (String)((StringRefAddr)addr).getContent();
+            }
+        }
+        throw new MalformedLinkException();
+    }
+    /**
+     * Use serialVersionUID from JNDI 1.1.1 for interoperability
+     */
+    private static final long serialVersionUID = -5386290613498931298L;
+}