Java Utililty Methods XML Transform

Source xmlSource = new StreamSource(new StringReader(xmlsource));
Source xsltSource = new StreamSource(xsltfile);
StringWriter stringWriter = new StringWriter();
TransformerFactory transFact = TransformerFactory.newInstance();
Templates cachedXSLT = transFact.newTemplates(xsltSource);
Transformer trans = cachedXSLT.newTransformer();
trans.transform(xmlSource, new StreamResult(stringWriter));
return stringWriter.toString();
...

StringReader sr = new StringReader(xslSource);
DOMResult result = new DOMResult();
doTransform(new StreamSource(sr), new DOMSource(original), result);
return result.getNode();

StreamResult result = new StreamResult(new StringWriter());
DOMSource source = new DOMSource(element);
transformer.transform(source, result);
String xmlString = result.getWriter().toString();
return xmlString;

InputStream is = new ByteArrayInputStream(xmlOrigen.getBytes("UTF-8"));
Source xmlSource = new StreamSource(is);
Source xsltSource = new StreamSource(new File(xslOrigen));
StringWriter cadenaSalida = new StringWriter();
Result bufferResultado = new StreamResult(cadenaSalida);
TransformerFactory factoriaTrans = TransformerFactory.newInstance();
Transformer transformador = factoriaTrans.newTransformer(xsltSource);
transformador.transform(xmlSource, bufferResultado);
...

TransformerFactory tf = TRANSFORMER_FACTORY.get();
if (tf == null) {
    tf = TransformerFactory.newInstance();
    TRANSFORMER_FACTORY.set(tf);
return tf.newTransformer();

System.out.println("[XPathUtil] Transformer exception selecting " + "XObject for " + "XPath String " + str
        + " with context node " + nodeToString(contextNode) + ": " + ex);

final TransformerFactory tf = TransformerFactory.newInstance();
return tf;

TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(stylesheetFile);
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.transform(new StreamSource(input), new StreamResult(output));

ByteArrayOutputStream baos = new ByteArrayOutputStream();
File logFile = new File(logFilePath);
if (logFile.exists()) {
    File xslFile = new File(xslFilePath);
    if (xslFile.exists()) {
        TransformerFactory factory = TransformerFactory.newInstance();
        Source xslt = new StreamSource(new File(xslFilePath));
        Transformer transformer = factory.newTransformer(xslt);
...

TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
if (omitXmlDeclaration) {
    trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
trans.transform(new DOMSource(node), new StreamResult(os));