JavaTM 2 Platform
Standard Ed. 5.0

Interface XPathFunction

public interface XPathFunction

XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.


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

Method Detail


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.

args - The arguments, null is a valid value.
The result of evaluating the XPath function as an Object.
XPathFunctionException - If args cannot be evaluated with this XPath function.

JavaTM 2 Platform
Standard Ed. 5.0

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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