Java Utililty Methods XML Node Serialize

Document document = domElement.getOwnerDocument();
DOMImplementationLS domImplLS = (DOMImplementationLS) document.getImplementation();
LSSerializer serializer = domImplLS.createLSSerializer();
serializer.getDomConfig().setParameter("xml-declaration", false);
return serializer.writeToString(domElement);

int type = node.getNodeType();
try {
    switch (type) {
    case Node.DOCUMENT_NODE: {
        writeString.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        writeString = serializeDom(((Document) node).getDocumentElement(), writeString);
        break;
    case Node.ELEMENT_NODE: {
        writeString.append("<");
        writeString.append(node.getNodeName());
        NamedNodeMap attrs = node.getAttributes();
        for (int i = 0; i < attrs.getLength(); i++) {
            Node attr = attrs.item(i);
            String outString = " " + attr.getNodeName() + "=\""
                    + replaceSpecialCharacters(attr.getNodeValue()) + "\"";
            writeString.append(outString);
        writeString.append(">");
        NodeList children = node.getChildNodes();
        if (children != null) {
            int len = children.getLength();
            for (int i = 0; i < len; i++)
                writeString = serializeDom(children.item(i), writeString);
        break;
    case Node.ENTITY_REFERENCE_NODE: {
        String outString = "&" + node.getNodeName() + ";";
        writeString.append(outString);
        break;
    case Node.CDATA_SECTION_NODE: {
        String outString = "<![CDATA[" + node.getNodeValue() + "]]>";
        writeString.append(outString);
        break;
    case Node.TEXT_NODE: {
        writeString.append(replaceSpecialCharacters(node.getNodeValue()));
        break;
    case Node.PROCESSING_INSTRUCTION_NODE: {
        String data = node.getNodeValue();
        String outString = "<?" + node.getNodeName() + " " + data + "?>";
        writeString.append(outString);
        break;
    if (type == Node.ELEMENT_NODE) {
        String outString = "</" + node.getNodeName() + ">";
        writeString.append(outString);
} catch (Exception e) {
return writeString;

String serializedElement = null;
if (element != null) {
    StringWriter output = new StringWriter();
    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    transformer.transform(new DOMSource(element), new StreamResult(output));
    serializedElement = output.toString();
return serializedElement;
...

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, omitXmlDeclaration ? "yes" : "no");
transformer.setOutputProperty(OutputKeys.METHOD, method);
transformer.setOutputProperty(OutputKeys.INDENT, indent ? "yes" : "no");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(element), new StreamResult(writer));
...

if (writer == null)
    writer = new BufferedWriter(new OutputStreamWriter(System.out));
switch (node.getNodeType()) {
case Node.DOCUMENT_NODE:
    Document doc = (Document) node;
    writer.write("<?xml version=\"");
    writer.write(doc.getXmlVersion());
    writer.write("\" encoding=\"UTF-8\" standalone=\"");
...

String serializedElement = null;
if (node != null) {
    DOMImplementationLS impl = getDOMImplementationLS(node);
    LSSerializer writer = impl.createLSSerializer();
    serializedElement = writer.writeToString(node);
return serializedElement;

StringBuffer buffer = new StringBuffer();
String nodeType = null;
Short nodeTypeNum = node.getNodeType();
switch (nodeTypeNum) {
case Node.ATTRIBUTE_NODE:
    nodeType = "ATTRIBUTE";
    break;
case Node.CDATA_SECTION_NODE:
...

return new String(serializeNode(node, "UTF-8", false), "UTF-8");

String serializedElement = null;
if (node != null) {
    System.setProperty(DOMImplementationRegistry.PROPERTY,
            "org.apache.xerces.dom.DOMImplementationSourceImpl");
    DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
    DOMImplementationLS impl = (DOMImplementationLS) registry.getDOMImplementation("LS");
    LSSerializer writer = impl.createLSSerializer();
    serializedElement = writer.writeToString(node);
...

try {
    Transformer xform = TransformerFactory.newInstance().newTransformer();
    DOMSource domSrc = new DOMSource(node);
    FileOutputStream fos = new FileOutputStream(filename);
    StreamResult streamResult = new StreamResult(fos);
    xform.transform(domSrc, streamResult);
    fos.close();
} catch (Exception e) {
...