Java - How to use java to check the active directory authentication?

El sigueinte código tendría que ser la base para conectarse a un active directory desde
una aplicación Java

try
       {
           Hashtable env = new Hashtable();
           env.put(Context.INITIAL_CONTEXT_FACTORY,
                   "com.sun.jndi.ldap.LdapCtxFactory");

           env.put(Context.PROVIDER_URL,
                   "ldap://" + getProperty("SERVER") + ":" +
                   getProperty("PORT"));

           env.put(Context.SECURITY_PRINCIPAL,
                   getProperty("USER_RDN") + "," +
                   getProperty("BASE_DN"));
           env.put(Context.SECURITY_CREDENTIALS,
                   getProperty("USER_PASSWORD"));

           DirContext ctx = new InitialDirContext(env);

           ctx.getAttributes(getProperty("BASE_DN"));

           ctx.close();

           info("connection_succeeded");
       }
       catch (CommunicationException comEx)
       {
           error(MessageResource.getMessage("communication_exception",
                                            comEx.getMessage()));
           return false;
       }
       catch (AuthenticationException authEx)
       {
           error(MessageResource.getMessage("authentication_exception",
                                            authEx.getMessage()));
           return false;
       }
       catch (NamingException nameEx)
       {
           error(MessageResource.getMessage("naming_exception",
                                            nameEx.toString()));
           return false;
       }

       return true;

Java Programming - How to use java to check the active directory authentication?