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JavaTM 2 Platform Std. Ed. v1.6.0

javax.xml.xpath
Interface XPathFunction


public interface XPathFunction

XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.

Since:
1.5

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

Method Detail

evaluate

Object evaluate(List args)
                throws XPathFunctionException

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.

Copyright 2003 Sun Microsystems, Inc. All rights reserved