/**
* Bind a function, given the URI and local parts of the function name, and the list of
* expressions supplied as arguments. This method is called at compile time.
*
* @param functionName
* @param staticArgs The expressions supplied statically in the function call. The intention is
* that the static type of the arguments (obtainable via getItemType() and getCardinality()
* may be used as part of the binding algorithm.
* @param env
* @return An object representing the extension function to be called, if one is found; null if no
* extension function was found matching the required name and arity.
* @throws net.sf.saxon.trans.XPathException if a function is found with the required name and
* arity, but the implementation of the function cannot be loaded or used; or if an error
* occurs while searching for the function; or if this function library "owns" the namespace
* containing the function call, but no function was found.
*/
public Expression bind(StructuredQName functionName, Expression[] staticArgs, StaticContext env)
throws XPathException {
XSLFunction fn = stylesheet.getStylesheetFunction(functionName, staticArgs.length);
if (fn == null) {
return null;
}
if (fn.isOverriding() != overriding) {
return null;
}
UserFunctionCall fc = new UserFunctionCall();
fn.registerReference(fc);
fc.setFunctionName(functionName);
fc.setArguments(staticArgs);
fc.setConfirmed(true);
return fc;
}
