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XPathFunction.java API Doc Java SE 5 API 1431 Fri Aug 26 14:58:26 BST 2005 javax.xml.xpath

XPathFunction

public interface XPathFunction

XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.

author: Norman Walsh
author: Jeff Suttor
version: $Revision: 1.10 $, $Date: 2004/02/11 20:14:32 $
since: 1.5

Fields Summary
Constructors Summary
Methods Summary
public java.lang.Object evaluate(java.util.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.
param
args The arguments, null is a valid value.
return
The result of evaluating the XPath function as an Object.
throws
XPathFunctionException If args cannot be evaluated with this XPath function.