Comment 1 Rick Barkhouse 2012-05-23 10:00:25 EDT

http://www.w3.org/TR/xml-c14n

* The document is encoded in UTF-8
* Line breaks normalized to #xA on input, before parsing
* Attribute values are normalized, as if by a validating processor
* Character and parsed entity references are replaced
* CDATA sections are replaced with their character content
* The XML declaration and document type declaration (DTD) are removed
* Empty elements are converted to start-end tag pairs
* Whitespace outside of the document element and within start and end tags is normalized
* All whitespace in character content is retained (excluding characters removed during line feed normalization)
* Attribute value delimiters are set to quotation marks (double quotes)
* Special characters in attribute values and character content are replaced by character references
* Superfluous namespace declarations are removed from each element
* Default attributes are added to each element
* Lexicographic order is imposed on the namespace declarations and attributes of each element

Comment 2 Rick Barkhouse 2012-05-23 10:02:51 EDT

Using Apache security canonicalizer:

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = db.newDocument();
marshaller.marshal(obj, doc);

doc.normalize();
Init.init();
byte[] c14nOutputbytes = Canonicalizer.getInstance(
    Canonicalizer.ALGO_ID_C14N_WITH_COMMENTS)
    .canonicalizeSubtree(doc.getDocumentElement());
// Re-parse to get attributes in alpha order
Document canonical = db.parse(new ByteArrayInputStream(c14nOutputbytes));

Comment 3 Rick Barkhouse 2012-05-23 10:06:25 EDT

Created attachment 216127 [details]
Test case

Comment 4 Eclipse Webmaster 2022-06-09 10:05:40 EDT

The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink