Getting LDAP Response Controls
This example uses the JNDI/LDAP service provider to connect to an LDAP server on the local machine. It then performs a search and looks for controls returned with the search responses. 

 
 try {
     LdapContext ctx = new InitialLdapContext(
       env, null);
     
     // Perform search
     NamingEnumeration answer = ctx.search(
       "ou=People", "(cn=*)", null);
     
     // Examine the response controls (if any)
     process(ctx.getResponseControls());
  
     // Enumerate answers
     while (answer.hasMore()) {
         SearchResult si =
           (SearchResult)answer.next();
     
         // Examine the response controls (if any)
         if (si instanceof HasControls) {
             process(
               ((HasControls)si).getControls());
         }
     }
     // Examine the response controls (if any)
     process(ctx.getResponseControls());
 } catch (NamingException e) {
 }