code: public static EntryResolver newSearchEntryResolver(final LdapAuthenticationProperties l) {
          final PooledSearchEntryResolver entryResolver = new PooledSearchEntryResolver();
          entryResolver.setBaseDn(l.getBaseDn());
          entryResolver.setUserFilter(l.getUserFilter());
          entryResolver.setSubtreeSearch(l.isSubtreeSearch());
          entryResolver.setConnectionFactory(LdaptiveAuthenticatorBuilder.newPooledConnectionFactory(l));
          return entryResolver;
      }
docs: New dn resolver entry resolver.
  
  @param l the ldap settings
  @return the entry resolver