Added in API level 8

XPathFunction

public interface XPathFunction

javax.xml.xpath.XPathFunction


XPathFunction provides access to XPath functions.

Functions are identified by QName and arity in XPath.

Summary

Public methods

abstract Object evaluate(List<E> args)

Evaluate the function with the specified arguments.

Public methods

evaluate

Added in API level 8
public abstract Object evaluate (List<E> 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 List: The arguments, null is a valid value.

Returns
Object The result of evaluating the XPath function as an Object.

Throws
XPathFunctionException If args cannot be evaluated with this XPath function.