*
 * <p>For details on the behavior of the escapers in this class, see sections <a
 * href="http://www.w3.org/TR/2008/REC-xml-20081126/#charsets">2.2</a> and <a
 * href="http://www.w3.org/TR/2008/REC-xml-20081126/#syntax">2.4</a> of the XML specification.
 *
 * @author Alex Matevossian
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible

            return false;
        }

        EncryptionNegotiateContext rec = null;
        for ( NegotiateContextRequest rnc : req.getNegotiateContexts() ) {
            if ( rnc instanceof EncryptionNegotiateContext ) {
                rec = (EncryptionNegotiateContext) rnc;
            }
        }
        if ( rec == null ) {
            return false;
        }

        boolean valid = false;