XPathFunction

public interface XPathFunction

XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.

Public Method Summary

abstract Object

evaluate(List args) Evaluate the function with the specified arguments.

Public Methods

public abstract 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. 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.