javax.xml.xpath
public interface XPathFunction
XPathFunction
provides access to XPath functions.
Functions are identified by QName and arity in XPath.
Since: 1.5
Version: $Revision: 226183 $, $Date: 2005-04-08 06:39:14 -0400 (Fri, 08 Apr 2005) $
Method Summary | |
---|---|
Object | evaluate(List args) Evaluate the function with the specified arguments. To the greatest extent possible, side-effects should be avoided in the definition of extension functions. |
Evaluate the function with the specified arguments.
To the greatest extent possible, side-effects should be avoided in the definition of extension functions. The implementation evaluating an XPath expression is under no obligation to call extension functions in any particular order or any particular number of times.
Parameters: args The arguments, null
is a valid value.
Returns: The result of evaluating the XPath
function as an Object
.
Throws: XPathFunctionException If args
cannot be evaluated with this XPath
function.