protected void outputAttributes()

in src/main/java/org/apache/xml/security/c14n/implementations/Canonicalizer20010315Excl.java [239:337]
78 lines of code
31 McCabe index (conditional complexity)

    protected void outputAttributes(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
        Set<String> visiblyUtilized = null;
        // It's the output selected.
        boolean isOutputElement = isVisibleDO(element, ns.getLevel()) == 1;
        if (isOutputElement) {
            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())) {
                    if (isVisible(attribute) && isOutputElement) {
                        // The Element is output element, add the prefix (if used)
                        // to visibyUtilized
                        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 (isOutputElement && !isVisible(attribute) && !XMLNS.equals(NName)) {
                    ns.removeMappingIfNotRender(NName);
                } else {
                    if (!isOutputElement && isVisible(attribute)
                        && inclusiveNSSet.contains(NName)
                        && !ns.removeMappingIfRender(NName)) {
                        Node n = ns.addMappingAndRender(NName, NNodeValue, attribute);
                        if (n != null) {
                            result.add((Attr)n);
                            if (C14nHelper.namespaceIsRelative(attribute)) {
                                Object[] exArgs = { element.getTagName(), NName, attribute.getNodeValue() };
                                throw new CanonicalizationException(
                                    "c14n.Canonicalizer.RelativeNamespace", exArgs
                                );
                            }
                        }
                    }

                    if (ns.addMapping(NName, NNodeValue, attribute)
                        && C14nHelper.namespaceIsRelative(NNodeValue)) {
                        // New definition check if it is relative
                        Object[] exArgs = { element.getTagName(), NName, attribute.getNodeValue() };
                        throw new CanonicalizationException(
                            "c14n.Canonicalizer.RelativeNamespace", exArgs
                        );
                    }
                }
            }
        }

        if (isOutputElement) {
            // The element is visible, handle the xmlns definition
            Attr xmlns = element.getAttributeNodeNS(XMLNS_URI, XMLNS);
            if (xmlns != null && !isVisible(xmlns)) {
                // There is a definition but the xmlns is not selected by the
                // xpath. then xmlns=""
                ns.addMapping(XMLNS, "", getNullNode(xmlns.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);
        }
    }