/**
* Creates a <code>DOMReference</code> from an element.
*
* @param refElem a Reference element
*/
public DOMReference(Element refElem, XMLCryptoContext context) throws MarshalException {
// unmarshal Transforms, if specified
Element nextSibling = DOMUtils.getFirstChildElement(refElem);
List transforms = new ArrayList(5);
if (nextSibling.getLocalName().equals("Transforms")) {
Element transformElem = DOMUtils.getFirstChildElement(nextSibling);
while (transformElem != null) {
transforms.add(new DOMTransform(transformElem, context));
transformElem = DOMUtils.getNextSiblingElement(transformElem);
}
nextSibling = DOMUtils.getNextSiblingElement(nextSibling);
}
// unmarshal DigestMethod
Element dmElem = nextSibling;
this.digestMethod = DOMDigestMethod.unmarshal(dmElem);
// unmarshal DigestValue
try {
Element dvElem = DOMUtils.getNextSiblingElement(dmElem);
this.digestValue = Base64.decode(dvElem);
} catch (Base64DecodingException bde) {
throw new MarshalException(bde);
}
// unmarshal attributes
this.uri = DOMUtils.getAttributeValue(refElem, "URI");
this.id = DOMUtils.getAttributeValue(refElem, "Id");
this.type = DOMUtils.getAttributeValue(refElem, "Type");
this.here = refElem.getAttributeNodeNS(null, "URI");
this.refElem = refElem;
if (transforms.isEmpty()) {
this.transforms = Collections.EMPTY_LIST;
} else {
this.transforms = Collections.unmodifiableList(transforms);
}
this.appliedTransforms = Collections.EMPTY_LIST;
this.allTransforms = transforms;
this.appliedTransformData = null;
}
private void unmarshalParams(Element curXPathElem) throws MarshalException {
List<XPathType> list = new ArrayList<XPathType>();
while (curXPathElem != null) {
String xPath = curXPathElem.getFirstChild().getNodeValue();
String filterVal = DOMUtils.getAttributeValue(curXPathElem, "Filter");
if (filterVal == null) {
throw new MarshalException("filter cannot be null");
}
XPathType.Filter filter = null;
if (filterVal.equals("intersect")) {
filter = XPathType.Filter.INTERSECT;
} else if (filterVal.equals("subtract")) {
filter = XPathType.Filter.SUBTRACT;
} else if (filterVal.equals("union")) {
filter = XPathType.Filter.UNION;
} else {
throw new MarshalException("Unknown XPathType filter type" + filterVal);
}
NamedNodeMap attributes = curXPathElem.getAttributes();
if (attributes != null) {
int length = attributes.getLength();
Map<String, String> namespaceMap = new HashMap<String, String>(length);
for (int i = 0; i < length; i++) {
Attr attr = (Attr) attributes.item(i);
String prefix = attr.getPrefix();
if (prefix != null && prefix.equals("xmlns")) {
namespaceMap.put(attr.getLocalName(), attr.getValue());
}
}
list.add(new XPathType(xPath, filter, namespaceMap));
} else {
list.add(new XPathType(xPath, filter));
}
curXPathElem = DOMUtils.getNextSiblingElement(curXPathElem);
}
this.params = new XPathFilter2ParameterSpec(list);
}