public Data canonicalize()

in src/main/java/org/apache/jcp/xml/dsig/internal/dom/ApacheCanonicalizer.java [119:186]
65 lines of code
13 McCabe index (conditional complexity)

    public Data canonicalize(Data data, XMLCryptoContext xc, OutputStream os)
        throws TransformException
    {
        if (canonicalizer == null) {
            try {
                canonicalizer = Canonicalizer.getInstance(getAlgorithm());
                LOG.log(Level.DEBUG, "Created canonicalizer for algorithm: {0}", getAlgorithm());
            } catch (InvalidCanonicalizerException ice) {
                throw new TransformException
                    ("Couldn't find Canonicalizer for: " + getAlgorithm() +
                     ": " + ice.getMessage(), ice);
            }
        }

        boolean isByteArrayOutputStream = os == null;
        OutputStream writer = isByteArrayOutputStream ? new ByteArrayOutputStream() : os;
        try {
            boolean secVal = Utils.secureValidation(xc);
            Set<Node> nodeSet = null;
            if (data instanceof ApacheData) {
                XMLSignatureInput in =
                    ((ApacheData)data).getXMLSignatureInput();
                if (in.isElement()) {
                    if (inclusiveNamespaces != null) {
                        canonicalizer.canonicalizeSubtree(in.getSubNode(), inclusiveNamespaces, writer);
                        return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
                    } else {
                        canonicalizer.canonicalizeSubtree(in.getSubNode(), writer);
                        return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
                    }
                } else if (in.isNodeSet()) {
                    nodeSet = in.getNodeSet();
                } else {
                    canonicalizer.canonicalize(Utils.readBytesFromStream(in.getUnprocessedInput()), writer, secVal);
                    return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
                }
            } else if (data instanceof DOMSubTreeData) {
                DOMSubTreeData subTree = (DOMSubTreeData)data;
                if (inclusiveNamespaces != null) {
                    canonicalizer.canonicalizeSubtree(subTree.getRoot(), inclusiveNamespaces, writer);
                    return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
                } else {
                    canonicalizer.canonicalizeSubtree(subTree.getRoot(), writer);
                    return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
                }
            } else if (data instanceof NodeSetData) {
                NodeSetData nsd = (NodeSetData)data;
                // convert Iterator to Set
                @SuppressWarnings("unchecked")
                Set<Node> ns = Utils.toNodeSet(nsd.iterator());
                nodeSet = ns;
                LOG.log(Level.DEBUG, "Canonicalizing {0} nodes", nodeSet.size());
            } else {
                canonicalizer.canonicalize(Utils.readBytesFromStream(((OctetStreamData)data).getOctetStream()), writer, secVal);
                return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
            }

            if (inclusiveNamespaces != null) {
                canonicalizer.canonicalizeXPathNodeSet(nodeSet, inclusiveNamespaces, writer);
                return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
            } else {
                canonicalizer.canonicalizeXPathNodeSet(nodeSet, writer);
                return new OctetStreamData(new ByteArrayInputStream(getC14nBytes(writer, isByteArrayOutputStream)));
            }
        } catch (Exception e) {
            throw new TransformException(e);
        }
    }