protected void outputAttributesSubtree()

in src/main/java/org/apache/xml/security/c14n/implementations/Canonicalizer20010315Excl.java [166:236]
56 lines of code
22 McCabe index (conditional complexity)

    protected void outputAttributesSubtree(Element element, NameSpaceSymbTable ns,
                                           Map<String, byte[]> cache, OutputStream writer)
        throws CanonicalizationException, DOMException, IOException {
        // result will contain the attrs which have to be output
        SortedSet<Attr> result = new TreeSet<>(COMPARE);

        // The prefix visibly utilized (in the attribute or in the name) in
        // the element
        SortedSet<String> visiblyUtilized = new TreeSet<>();
        if (!inclusiveNSSet.isEmpty()) {
            visiblyUtilized.addAll(inclusiveNSSet);
        }

        if (element.hasAttributes()) {
            NamedNodeMap attrs = element.getAttributes();
            int attrsLength = attrs.getLength();
            for (int i = 0; i < attrsLength; i++) {
                Attr attribute = (Attr) attrs.item(i);
                String NName = attribute.getLocalName();
                String NNodeValue = attribute.getNodeValue();

                if (!XMLNS_URI.equals(attribute.getNamespaceURI())) {
                    // Not a namespace definition.
                    // The Element is output element, add the prefix (if used) to
                    // visiblyUtilized
                    String prefix = attribute.getPrefix();
                    if (prefix != null && !(prefix.equals(XML) || prefix.equals(XMLNS))) {
                        visiblyUtilized.add(prefix);
                    }
                    // Add to the result.
                    result.add(attribute);
                } else if (!(XML.equals(NName) && XML_LANG_URI.equals(NNodeValue))
                    && ns.addMapping(NName, NNodeValue, attribute)
                    && C14nHelper.namespaceIsRelative(NNodeValue)) {
                    // The default mapping for xml must not be output.
                    // New definition check if it is relative.
                    Object[] exArgs = {element.getTagName(), NName, attribute.getNodeValue()};
                    throw new CanonicalizationException(
                        "c14n.Canonicalizer.RelativeNamespace", exArgs
                    );
                }
            }
        }
        if (propagateDefaultNamespace && ns.getLevel() == 1 &&
                inclusiveNSSet.contains(XMLNS) &&
                ns.getMappingWithoutRendered(XMLNS) == null) {
                ns.removeMapping(XMLNS);
                ns.addMapping(
                    XMLNS, "", getNullNode(element.getOwnerDocument()));
        }
        String prefix = null;
        if (element.getNamespaceURI() != null
            && !(element.getPrefix() == null || element.getPrefix().length() == 0)) {
            prefix = element.getPrefix();
        } else {
            prefix = XMLNS;
        }
        visiblyUtilized.add(prefix);

        for (String s : visiblyUtilized) {
            Attr key = ns.getMapping(s);
            if (key != null) {
                result.add(key);
            }
        }

        //we output all Attrs which are available
        for (Attr attr : result) {
            outputAttrToWriter(attr.getNodeName(), attr.getNodeValue(), writer, cache);
        }
    }