/**
* Returns the Attr[]s to be outputted for the given element. <br>
* The code of this method is a copy of {@link #handleAttributes(Element, NameSpaceSymbTable)},
* whereas it takes into account that subtree-c14n is -- well -- subtree-based. So if the element
* in question isRoot of c14n, it's parent is not in the node set, as well as all other ancestors.
*
* @param E
* @param ns
* @return the Attr[]s to be outputted
* @throws CanonicalizationException
*/
Iterator handleAttributesSubtree(Element E, NameSpaceSymbTable ns)
throws CanonicalizationException {
if (!E.hasAttributes() && !firstCall) {
return null;
}
// result will contain the attrs which have to be outputted
final SortedSet result = this.result;
result.clear();
NamedNodeMap attrs = E.getAttributes();
int attrsLength = attrs.getLength();
for (int i = 0; i < attrsLength; i++) {
Attr N = (Attr) attrs.item(i);
String NName = N.getLocalName();
String NValue = N.getValue();
String NUri = N.getNamespaceURI();
if (!XMLNS_URI.equals(NUri)) {
// It's not a namespace attr node. Add to the result and continue.
result.add(N);
continue;
}
if (XML.equals(NName) && XML_LANG_URI.equals(NValue)) {
// The default mapping for xml must not be output.
continue;
}
Node n = ns.addMappingAndRender(NName, NValue, N);
if (n != null) {
// Render the ns definition
result.add(n);
if (C14nHelper.namespaceIsRelative(N)) {
Object exArgs[] = {E.getTagName(), NName, N.getNodeValue()};
throw new CanonicalizationException("c14n.Canonicalizer.RelativeNamespace", exArgs);
}
}
}
if (firstCall) {
// It is the first node of the subtree
// Obtain all the namespaces defined in the parents, and added to the output.
ns.getUnrenderedNodes(result);
// output the attributes in the xml namespace.
addXmlAttributesSubtree(E, result);
firstCall = false;
}
return result.iterator();
}
/**
* Returns the Attr[]s to be outputted for the given element. <br>
* IMPORTANT: This method expects to work on a modified DOM tree, i.e. a DOM which has been
* prepared using {@link lib.org.apache.xml.security.utils.XMLUtils#circumventBug2650(
* org.w3c.dom.Document)}.
*
* @param E
* @param ns
* @return the Attr[]s to be outputted
* @throws CanonicalizationException
*/
Iterator handleAttributes(Element E, NameSpaceSymbTable ns) throws CanonicalizationException {
// result will contain the attrs which have to be outputted
boolean isRealVisible = isVisible(E);
NamedNodeMap attrs = null;
int attrsLength = 0;
if (E.hasAttributes()) {
attrs = E.getAttributes();
attrsLength = attrs.getLength();
}
SortedSet result = this.result;
result.clear();
for (int i = 0; i < attrsLength; i++) {
Attr N = (Attr) attrs.item(i);
String NName = N.getLocalName();
String NValue = N.getValue();
String NUri = N.getNamespaceURI();
if (!XMLNS_URI.equals(NUri)) {
// A non namespace definition node.
if (isRealVisible) {
// The node is visible add the attribute to the list of output attributes.
result.add(N);
}
// keep working
continue;
}
if ("xml".equals(NName) && XML_LANG_URI.equals(NValue)) {
/* except omit namespace node with local name xml, which defines
* the xml prefix, if its string value is http://www.w3.org/XML/1998/namespace.
*/
continue;
}
// add the prefix binding to the ns symb table.
// ns.addInclusiveMapping(NName,NValue,N,isRealVisible);
if (isVisible(N)) {
// The xpath select this node output it if needed.
Node n = ns.addMappingAndRenderXNodeSet(NName, NValue, N, isRealVisible);
if (n != null) {
result.add(n);
if (C14nHelper.namespaceIsRelative(N)) {
Object exArgs[] = {E.getTagName(), NName, N.getNodeValue()};
throw new CanonicalizationException("c14n.Canonicalizer.RelativeNamespace", exArgs);
}
}
}
}
if (isRealVisible) {
// The element is visible, handle the xmlns definition
Attr xmlns = E.getAttributeNodeNS(XMLNS_URI, XMLNS);
Node n = null;
if (xmlns == null) {
// No xmlns def just get the already defined.
n = ns.getMapping(XMLNS);
} else if (!isVisible(xmlns)) {
// There is a definition but the xmlns is not selected by the xpath.
// then xmlns=""
n = ns.addMappingAndRenderXNodeSet(XMLNS, "", nullNode, true);
}
// output the xmlns def if needed.
if (n != null) {
result.add(n);
}
// Float all xml:* attributes of the unselected parent elements to this one.
addXmlAttributes(E, result);
}
return result.iterator();
}
