public String getNamespacePrefix(String uri) {
NamespaceContextIterator eachNamespace = getNamespaceContextNodes();
while (eachNamespace.hasNext()) {
org.w3c.dom.Attr namespaceDecl = eachNamespace.nextNamespaceAttr();
if (namespaceDecl.getNodeValue().equals(uri)) {
String candidatePrefix = namespaceDecl.getLocalName();
if ("xmlns".equals(candidatePrefix)) return "";
else return candidatePrefix;
}
}
// Find if any of the ancestors' name has this uri
org.w3c.dom.Node currentAncestor = this;
while (currentAncestor != null && !(currentAncestor instanceof Document)) {
if (uri.equals(currentAncestor.getNamespaceURI())) return currentAncestor.getPrefix();
currentAncestor = currentAncestor.getParentNode();
}
return null;
}
