protected void outputAttributes()

in src/main/java/org/apache/xml/security/c14n/implementations/Canonicalizer20010315.java [208:297]
69 lines of code
23 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
        xmlattrStack.push(ns.getLevel());
        boolean isRealVisible = isVisibleDO(element, ns.getLevel()) == 1;
        SortedSet<Attr> result = new TreeSet<>(COMPARE);

        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 NUri = attribute.getNamespaceURI();
                String NName = attribute.getLocalName();
                String NValue = attribute.getValue();

                if (!XMLNS_URI.equals(NUri)) {
                    //A non namespace definition node.
                    if (XML_LANG_URI.equals(NUri)) {
                        if (c14n11 && "id".equals(NName)) {
                            if (isRealVisible) {
                                // treat xml:id like any other attribute
                                // (emit it, but don't inherit it)
                                result.add(attribute);
                            }
                        } else {
                            xmlattrStack.addXmlnsAttr(attribute);
                        }
                    } else if (isRealVisible) {
                        //The node is visible add the attribute to the list of output attributes.
                        result.add(attribute);
                    }
                } else if (!XML.equals(NName) || !XML_LANG_URI.equals(NValue)) {
                    /* except omit namespace node with local name xml, which defines
                     * the xml prefix, if its string value is http://www.w3.org/XML/1998/namespace.
                     */
                    //add the prefix binding to the ns symb table.
                    if (isVisible(attribute))  {
                        if (isRealVisible || !ns.removeMappingIfRender(NName)) {
                            //The xpath select this node output it if needed.
                            Node n = ns.addMappingAndRender(NName, NValue, 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
                                    );
                                }
                            }
                        }
                    } else {
                        if (isRealVisible && !XMLNS.equals(NName)) {
                            ns.removeMapping(NName);
                        } else {
                            ns.addMapping(NName, NValue, attribute);
                        }
                    }
                }
            }
        }
        if (isRealVisible) {
            //The element is visible, handle the xmlns definition
            Attr xmlns = element.getAttributeNodeNS(XMLNS_URI, XMLNS);
            Node n = null;
            if (xmlns == null) {
                //No xmlns def just get the already defined.
                n = ns.getMapping(XMLNS);
            } else if (!isVisible(xmlns)) {
                //There is a definition but the xmlns is not selected by the xpath.
                //then xmlns=""
                n = ns.addMappingAndRender(
                        XMLNS, "", getNullNode(xmlns.getOwnerDocument()));
            }
            //output the xmlns def if needed.
            if (n != null) {
                result.add((Attr)n);
            }
            //Float all xml:* attributes of the unselected parent elements to this one.
            xmlattrStack.getXmlnsAttr(result);
            ns.getUnrenderedNodes(result);
        }

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