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public interface XPathFunction
XPathFunction
provides access to XPath functions.
Functions are identified by QName and arity in XPath.
Method Summary | |
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java.lang.Object |
evaluate(java.util.List args)
Evaluate the function with the specified arguments. |
Method Detail |
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java.lang.Object evaluate(java.util.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.
XPath
function as an Object
.
XPathFunctionException
- If args
cannot be evaluated with this XPath
function.
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