public Context getInitialContext(Hashtable env) throws NamingException 
{
   // InitialContextFactory implementation --------------------------
      // Parse the Context.PROVIDER_URL
      String provider = (String) env.get(Context.PROVIDER_URL);
      if( provider.startsWith("jnp:") == true )
         provider = "http:" + provider.substring(4);
      else if( provider.startsWith("jnps:") == true )
         provider = "https:" + provider.substring(5);
      else if( provider.startsWith("jnp-http:") == true )
         provider = "http:" + provider.substring(9);
      else if( provider.startsWith("jnp-https:") == true )
         provider = "https:" + provider.substring(10);
      URL providerURL = null;
      Naming namingServer = null;
      try
      {
         providerURL = new URL(provider);
         // Retrieve the Naming interface
         namingServer = getNamingServer(providerURL);
      }
      catch(Exception e)
      {
         NamingException ex = new NamingException("Failed to retrieve Naming interface for provider " + provider);
         ex.setRootCause(e);
         throw ex;
      }
      // Copy the context env
      env = (Hashtable) env.clone();
      return new NamingContext(env, null, namingServer);
}

 public Object getObjectInstance(Object obj,
    Name name,
    Context nameCtx,
    Hashtable env) throws Exception 
{
      Context ctx = getInitialContext(env);
      Reference ref = (Reference) obj;
      RefAddr addr = ref.get("URL");
      String path = (String) addr.getContent();
      return ctx.lookup(path);
}