Java Utililty Methods XPath Validate

List of utility methods to do XPath Validate

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Description

The list of methods to do XPath Validate are organized into topic(s).

Method

StringvalidateXPath(final Document doc, final String xpathExpression)
Validates the XPath expression entered by the user in a wizard. 
try {
    XPath xpath = XPathFactory.newInstance().newXPath();
    NodeList nodes = (NodeList) xpath.evaluate(xpathExpression, doc, XPathConstants.NODESET);
    if (nodes.getLength() == 1) {
        if (nodes.item(0).getNodeType() == Node.ATTRIBUTE_NODE) {
            return "attribute"; 
        } else if (nodes.item(0).getNodeType() == Node.ELEMENT_NODE) {
            return "single"; 
...
voidvalidateXPath(String path)
validate X Path 
final XPath xPath = XPathFactory.newInstance().newXPath();
try {
    xPath.compile(path);
} catch (XPathExpressionException e) {
    throw new IllegalArgumentException("Argument is not valid XPath string", e);
StringvalidateXPath(String xml, String... tests)
A helper method which validates a String against an array of XPath test strings. 
if (tests == null || tests.length == 0)
    return null;
Document document = null;
try {
    document = getXmlDocumentBuilder()
            .parse(new ByteArrayInputStream(xml.getBytes(StandardCharsets.UTF_8)));
} catch (UnsupportedEncodingException e1) {
    throw new RuntimeException("Totally weird UTF-8 exception", e1);
...
StringvalidateXPathExpression(String xpathExpression)
Validates a XPath expression. 
String msg = null;
try {
    X_PATH.compile(xpathExpression);
} catch (Exception e) {
    String cause = null;
    if (e.getCause() != null)
        e.getCause().getMessage();
    else
...