1 /*
   2  * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.jndi.url.dns;
  27 
  28 
  29 import java.net.MalformedURLException;
  30 import java.util.Hashtable;
  31 
  32 import javax.naming.*;
  33 import javax.naming.spi.ResolveResult;
  34 import com.sun.jndi.dns.*;
  35 import com.sun.jndi.toolkit.url.GenericURLDirContext;
  36 
  37 
  38 /**
  39  * A DNS URL context resolves names that are DNS pseudo-URLs.
  40  * See com.sun.jndi.dns.DnsUrl for a description of the URL format.
  41  *
  42  * @author Scott Seligman
  43  */
  44 
  45 
  46 public class dnsURLContext extends GenericURLDirContext {
  47 
  48     public dnsURLContext(Hashtable<?,?> env) {
  49         super(env);
  50     }
  51 
  52     /**
  53      * Resolves the host and port of "url" to a root context connected
  54      * to the named DNS server, and returns the domain name as the
  55      * remaining name.
  56      */
  57     protected ResolveResult getRootURLContext(String url, Hashtable<?,?> env)
  58             throws NamingException {
  59 
  60         DnsUrl dnsUrl;
  61         try {
  62             dnsUrl = new DnsUrl(url);
  63         } catch (MalformedURLException e) {
  64             throw new InvalidNameException(e.getMessage());
  65         }
  66 
  67         DnsUrl[] urls = new DnsUrl[] { dnsUrl };
  68         String domain = dnsUrl.getDomain();
  69 
  70         return new ResolveResult(
  71                 DnsContextFactory.getContext(".", urls, env),
  72                 new CompositeName().add(domain));
  73     }
  74 }