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Interface for the extensible function framework.
NOTE: This class is not typically used directly, but is exposed for writers of extended XPath packages.
Implementations of Function are functors
which are used to evaluate a function-call within an
XPath expression.
FunctionContext| Method Summary | |
Object |
call(Context context,
List args)
Evaluate this function. |
| Method Detail |
public Object call(Context context,
List args)
throws FunctionCallException
context - the context at the point in the
expression when the function is calledargs - arguments provided to the function
List
(node-set), Double, Boolean, or
String
FunctionCallException - if an XPath error occurs during evaluation;
for instance, if the number or type of the arguments is incorrect
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