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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 args)
Evaluate the function with the specified arguments. |
Public methods
evaluate
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 |
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. |