Java Utililty Methods XPath Expression

Boolean asBoolean(String expression, Node node)
Evaluates the specified XPath expression and returns the result as a Boolean.

return asBoolean(expression, node, xpath());

Long asLong(String expression, Node node)
Evaluates the specified XPath expression and returns the result as a Long.

String longString = evaluateAsString(expression, node);
return (isEmptyString(longString)) ? null : Long.valueOf(longString);

XPathExpression compile(String expression)
compile

return xPath.compile(expression);

XPathExpression compile(String expression)
Returns a compiled XPath expression.

return compile(expression, (NamespaceContext) null);

XPathExpression compile(String path)
compile

XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
try {
 return xpath.compile(path);
} catch (Exception e) {
 throw new RuntimeException(e);

XPathExpression compileXPathExpression(String xPathExpression)
compile X Path Expression

final XPathFactory factory = XPathFactory.newInstance();
final XPath xpath = factory.newXPath();
try {
 return xpath.compile(xPathExpression);
} catch (XPathExpressionException e) {
 throw new RuntimeException("Internal error, invalid XPATH expression " + xPathExpression, e);

String constructXPathForElement(Element inElem, String xPathRest)
construct X Path For Element

String xpathPart = "/" + inElem.getNodeName();
if (inElem.hasAttribute("id")) {
 xpathPart = "/" + xpathPart + "[@id = '" + inElem.getAttribute("id") + "']";
} else {
 xpathPart += "[" + countPrecedingSiblingsOfType(inElem) + "]";
 if (inElem.getParentNode() != null) {
 if (inElem.getParentNode().getNodeType() == Node.ELEMENT_NODE) {
 return constructXPathForElement((Element) (inElem.getParentNode()), xpathPart + xPathRest);
...

XPathFactory createFactory()
create Factory

return XPathFactory.newInstance();

XPath createNewXPath(@Nullable final NamespaceContext aNamespaceContext)
Create a new XPath with the passed namespace context using the default XPathFactory .

return createNewXPath(s_aXPathFactory, (XPathVariableResolver) null, (XPathFunctionResolver) null,
 aNamespaceContext);

Element createQueryResourcePropertiesCallBody(String aXqueryExpression)
Creates the frame for SOAP message body for calling 'QueryResourceProperties' method of a service (getting metadata)

DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.newDocument();
String methodName = "QueryResourceProperties";
String parameterName = "QueryExpression";
String nameSpace = "http://docs.oasis-open.org/wsrf/2004/06/wsrf-WS-ResourceProperties-1.2-draft-01.xsd";
Element methodElement = doc.createElementNS(nameSpace, methodName);
Element parameterElement = doc.createElementNS(nameSpace, parameterName);
parameterElement.setAttribute("Dialect", "http://www.w3.org/TR/1999/REC-xpath-19991116");
...