public void startElement(String uri, String localName, String qName, Attributes atts)
throws SAXException {
Set<String> mapped = new HashSet<String>();
mappedPrefixes.push(mapped);
AttributesImpl newAtts = new AttributesImpl();
// parse namespace declaration attributes
if (atts != null) {
for (int i = 0; i < atts.getLength(); i++) {
String attQname = atts.getQName(i);
boolean addAtt = true;
if (isNamespaceDeclaration(attQname)) {
String newPrefix = "";
String newUri = atts.getValue(i);
if (attQname.length() > NAMESPACE_DECLARATION_PREFIX.length()) {
newPrefix = attQname.substring(NAMESPACE_DECLARATION_PREFIX.length() + 1);
}
// xmlns prefix cannot be declared
if (NAMESPACE_DECLARATION_PREFIX.equals(newPrefix))
throwException(
NAMESPACE_DECLARATION_PREFIX + " namespace prefix cannot be declared");
// xml cannot be bound to a different uri
if (XML_PREFIX.equals(newPrefix)) {
if (!XML_URI.equals(newUri))
throwException(
XML_PREFIX
+ " namespace prefix cannot be bound to an URI different from "
+ XML_URI);
}
// no prefix except for xml can be bound to xml
// namespace
else if (XML_URI.equals(newUri))
throwException(
"only " + XML_PREFIX + " namespace prefix can be bound to " + XML_URI);
// check that new prefix is an ncname
if (newPrefix.length() > 0 && !XMLChar.isValidNCName(newPrefix))
throwException("namespace prefix " + newPrefix + " is not an NCName");
if (mapped.contains(newPrefix))
throwException(
"namespace prefix " + newPrefix + " declared twice in the same element");
Mapping mapping = new Mapping(newUri, prefixMappings.get(newPrefix));
prefixMappings.put(newPrefix, mapping);
mapped.add(newPrefix);
contentHandler.startPrefixMapping(newPrefix, newUri);
addAtt = namespacePrefixes;
}
if (addAtt) newAtts.addAttribute("", "", attQname, atts.getType(i), atts.getValue(i));
}
}
// set uris on attributes
for (int i = 0; i < newAtts.getLength(); i++) {
String attQname = newAtts.getQName(i);
ExpandedName splitName = parseQName(attQname);
newAtts.setLocalName(i, splitName.localName);
newAtts.setURI(i, splitName.uri);
}
ExpandedName splitName = parseQName(qName);
localName = splitName.localName;
uri = splitName.uri;
contentHandler.startElement(uri, localName, qName, newAtts);
}
