case WSConstants.ISSUER_SERIAL:
final String issuer = certs[0].getIssuerDN().getName();
final java.math.BigInteger serialNumber = certs[0].getSerialNumber();
final DOMX509IssuerSerial domIssuerSerial =
new DOMX509IssuerSerial(document, issuer, serialNumber);
final DOMX509Data domX509Data = new DOMX509Data(document, domIssuerSerial);
secRef.setX509Data(domX509Data);
break;
default:
throw new WSSecurityException(