Java Utililty Methods XPath Expression

List of utility methods to do XPath Expression

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Description

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

Method

StreamstreamNodes(String xpath, Object node)
stream Nodes 
return stream((NodeList) evaluateXPath(xpath, node, XPathConstants.NODESET));
Stringstring(Node context, String expression)
string 
try {
    String result = (String) xpath.evaluate(expression, context, XPathConstants.STRING);
    if (result == null || result.length() == 0)
        return null;
    else
        return result;
} catch (XPathExpressionException ex) {
    ex.printStackTrace();
...
Stringstring(String fileName, String xpathExpression)
string 
TransformerFactory transFact = TransformerFactory.newInstance();
try {
    Transformer transFormer = transFact.newTransformer();
    DOMResult dom = new DOMResult();
    transFormer.transform(new StreamSource(new FileInputStream(new File(fileName))), dom);
    XPath xpath = XPathFactory.newInstance().newXPath();
    XPathExpression expression = xpath.compile(xpathExpression);
    String value = (String) expression.evaluate(dom.getNode(), XPathConstants.STRING);
...
StringvalueOf(Node node, String xpath, NamespaceContext context)
Evaluates an XPath expression given a namespace context and returns the String value of the result, similar to the value-of function in XSLT. 
try {
    xpathObj.setNamespaceContext(context);
    String result = (String) xpathObj.evaluate(xpath, node, XPathConstants.STRING);
    xpathObj.reset();
    return result;
} catch (XPathExpressionException e) {
    return "";
StringxmlValueOf(Node node, String xpathExpression)
Returns the textual representation after evaluating the xpathExpression. 
List nodes = xmlSelectNodes(node, xpathExpression);
StringBuffer buf = new StringBuffer();
for (Iterator i = nodes.iterator(); i.hasNext();) {
    Node n = (Node) i.next();
    String str = xmlGetText(n);
    if (str != null)
        buf.append(str);
return buf.toString();
StringxPathStr(String expr, Object context)
x Path Str 
try {
    return xPath().evaluate(expr, context);
} catch (XPathExpressionException e) {
    throw new IllegalArgumentException(expr, e);
NodexpathToNode(String xpathQuery, Object domObject)
xpath To Node 
XPathFactory xpathFactory = XPathFactory.newInstance();
XPath xpath = xpathFactory.newXPath();
return (Node) xpath.evaluate(xpathQuery, domObject, XPathConstants.NODE);
StringXPathValueFromString(String sIn, String sxpath)
Returns the xml value. 
Document doc = loadXMLFromString(sIn);
XPath xPath = XPathFactory.newInstance().newXPath();
XPathExpression expr = xPath.compile(sxpath);
Object result = expr.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result;
String sReturn = "";
for (int i = 0; i < nodes.getLength(); i++) {
    sReturn = nodes.item(i).getNodeValue();
...