Java Utililty Methods XML Document to Stream

final org.w3c.dom.Document doc = edoc;
final PipedOutputStream pos = new PipedOutputStream();
PipedInputStream pis = new PipedInputStream();
pis.connect(pos);
(new Thread(new Runnable() {
    public void run() {
        try {
            TransformerFactory tFactory = TransformerFactory.newInstance();
...

Source source = new DOMSource(document);
Result result = new StreamResult(outputStream);
Transformer transformer;
try {
    transformer = TransformerFactory.newInstance().newTransformer();
    transformer.setOutputProperty(OutputKeys.METHOD, "xml");
    if (document.getXmlEncoding() == null) {
        transformer.setOutputProperty(OutputKeys.ENCODING, encoding);
...

InputStream is = null;
try {
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    Source xmlSource = new DOMSource(doc);
    Result outputTarget = new StreamResult(outputStream);
    TransformerFactory.newInstance().newTransformer().transform(xmlSource, outputTarget);
    is = new ByteArrayInputStream(outputStream.toByteArray());
} catch (TransformerConfigurationException e) {
...

TransformerFactory transformerFact = TransformerFactory.newInstance();
transformerFact.setAttribute("indent-number", 4);
Transformer transformer = transformerFact.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StreamResult result = new StreamResult(new StringWriter());
DOMSource source = new DOMSource(domTree);
transformer.transform(source, result);
String xmlString = result.getWriter().toString();
...

PrintWriter w = new PrintWriter(out);
w.print(doc.getText(0, doc.getLength()));
w.close();
out.close();

try {
    DOMSource domSource = new DOMSource(doc);
    StreamResult result = new StreamResult(out);
    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    transformer.setOutputProperty(OutputKeys.VERSION, doc.getXmlVersion());
    transformer.transform(domSource, result);
} catch (TransformerException e) {
    throw new IOException("unable to transform dom to a stream");
...

if (enc == null) {
    throw new NullPointerException(
            "You must set an encoding; use \"UTF-8\" unless you have a good reason not to!"); 
Document doc2 = normalize(doc);
ClassLoader orig = Thread.currentThread().getContextClassLoader();
Thread.currentThread()
        .setContextClassLoader(AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { 
...

DOMImplementationLS impl = (DOMImplementationLS) document.getImplementation();
LSOutput output = impl.createLSOutput();
output.setByteStream(byteStream);
LSSerializer serializer = impl.createLSSerializer();
serializer.getDomConfig().setParameter("format-pretty-print", true);
serializer.write(document, output);

try {
    TransformerFactory tFactory = TransformerFactory.newInstance();
    Transformer transformer = tFactory.newTransformer();
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty("{http://xml.apache.org/xalan}indent-amount", "2");
    DOMSource source = new DOMSource(doc);
    CharsetEncoder utf8Encoder = Charset.forName("UTF-8").newEncoder();
    StreamResult result = new StreamResult(new OutputStreamWriter(os, utf8Encoder));
...

TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer;
try {
    transformer = tFactory.newTransformer();
    DOMSource source = new DOMSource(doc);
    StreamResult result = new StreamResult(os);
    transformer.transform(source, result);
} catch (TransformerConfigurationException e) {
...