public static Long asLong(String expression, Node node)
            throws XPathExpressionException {
        return asLong(expression, node, xpath());
    }
public static Long asLong ( String expression , Node node ) throws XPathExpressionException { return asLong ( expression , node , xpath ( ) ) ; }
Evaluates the specified XPath expression and returns the result as a
Long.
<p>
This method can be expensive as a new xpath is instantiated per
invocation. Consider passing in the xpath explicitly via {
{@link #asDouble(String, Node, XPath)} instead.  Note {@link XPath} is
not thread-safe and not reentrant.

@param expression
The XPath expression to evaluate.
@param node
The node to run the expression on.

@return The Long result.

@throws XPathExpressionException
If there was a problem processing the specified XPath
expression.