--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/net/InetAddress/nameservice/dns/CanonicalName.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2002-2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+import java.net.InetAddress;
+import java.util.*;
+import javax.naming.*;
+import javax.naming.directory.*;
+
+/*
+ * Tests if a canonical name (CNAME) record exists for a
+ * specified host - throws exception if DNS isn't configured
+ * or there isn't a CNAME record.
+ */
+
+public class CanonicalName {
+
+    public static void main(String args[]) throws Exception {
+        final Hashtable<String,String> env = new Hashtable<String,String>();
+        env.put("java.naming.factory.initial",
+                "com.sun.jndi.dns.DnsContextFactory");
+        DirContext ctx = new InitialDirContext(env);
+
+        String ids[] = { "CNAME" };
+        Attributes attrs = ctx.getAttributes(args[0], ids);
+
+        NamingEnumeration ne = attrs.getAll();
+        if (!ne.hasMoreElements()) {
+            throw new Exception("no CNAME record");
+        }
+
+        // print out the CNAME records
+
+        while (ne.hasMoreElements()) {
+            Attribute attr = (Attribute)ne.next();
+            for (NamingEnumeration e = attr.getAll(); e.hasMoreElements();) {
+                System.out.println(args[0] + " -> " + e.next());
+            }
+        }
+
+    }
+}