Creates a DOMX509Data from an element.

  Creates a DOMX509Data from an element.
Parameters:
- xdElem - an X509Data element
Throws:
- MarshalException - if there is an error while unmarshalling

  Creates a DOMX509Data.

  Creates a DOMX509Data.
Returns: a X509Data
Parameters:
- content - a list of one or more X.509 data types. Valid types are {@link String} (subject names), byte[] (subject key ids), {@link java.security.cert.X509Certificate}, {@link X509CRL}, or {@link javax.xml.dsig.XMLStructure} ({@link X509IssuerSerial} objects or elements from an external namespace). The list is defensively copied to protect against subsequent modification.
Throws:
- NullPointerException - if content is null
- IllegalArgumentException - if content is empty
- ClassCastException - if content contains any entries that are not of one of the valid types mentioned above