Java Utililty Methods XPath Get

return (String) evaluateXPath(path, e, XPathConstants.STRING);

try {
    Document document = parseXML(new File(fileName));
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression xpathExpression = xpath.compile(xPathExpression);
    Node node = (Node) xpathExpression.evaluate(document, NODE);
    return getAttributeValueByName(node, attributeName);
} catch (Exception e) {
    throw new RuntimeException("Failed to extract element from:" + fileName, e);
...

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder;
try {
    builder = builderFactory.newDocumentBuilder();
    Document document = builder.parse(new ByteArrayInputStream(metadata));
    return (String) xPath.compile(BASE_LOCATION).evaluate(document, XPathConstants.STRING);
} catch (XPathExpressionException | ParserConfigurationException | SAXException | IOException e) {
    return null;
...

String s = getStringOrNull(node, expr);
if (s == null) {
    return def;
return s.equalsIgnoreCase("true");

Map<String, XPathExpression> mRetVal = sCache.get();
if (mRetVal == null) {
    mRetVal = new HashMap<String, XPathExpression>();
    sCache.set(mRetVal);
return mRetVal;

X509Certificate cert = null;
try {
    String s = x509Path.evaluate(keyInfoNode);
    if (s == null || s.length() == 0)
        return null;
    byte[] decoded = Base64.decodeBase64(s);
    cert = (X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(decoded));
} catch (XPathExpressionException e) {
...

XPathFactory factory = XPathFactory.newInstance();
XPath findPath = factory.newXPath();
findPath.setNamespaceContext(new NamespaceContext() {
    public String getNamespaceURI(String prefix) {
        if (prefix.equals("c")) {
            return "http://www.cruxframework.org/crux";
        } else if (prefix.equals("v")) {
            return "http://www.cruxframework.org/view";
...

return defaultXPath;

return s_aXPathFactory;

return getNodeValue(reference, GET_DIG_VAL_EXP);