/**
* Register a ATP function in runtime.
*
* @param name the function name
* @param func the functoin to register
* @throws ArgumentException if the function is unknown or already registered.
* @since 3.8 beta6
*/
public static void RegisterFunction(string name, FreeRefFunction func)
{
AnalysisToolPak inst = (AnalysisToolPak)instance;
if (!IsATPFunction(name))
{
FunctionMetadata metaData = FunctionMetadataRegistry.GetFunctionByName(name);
if (metaData != null)
{
throw new ArgumentException(name + " is a built-in Excel function. " +
"Use FunctoinEval.RegisterFunction(string name, Function func) instead.");
}
else
{
throw new ArgumentException(name + " is not a function from the Excel Analysis Toolpack.");
}
}
FreeRefFunction f = inst.FindFunction(name);
if (f != null && !(f is NotImplemented))
{
throw new ArgumentException("POI already implememts " + name +
". You cannot override POI's implementations of Excel functions");
}
if (_functionsByName.ContainsKey(name))
{
_functionsByName[name] = func;
}
else
{
_functionsByName.Add(name, func);
}
}
/**
* Returns a collection of ATP function names NOT implemented by POI.
*
* @return an array of not supported functions
* @since 3.8 beta6
*/
public static ReadOnlyCollection <String> GetNotSupportedFunctionNames()
{
AnalysisToolPak inst = (AnalysisToolPak)instance;
List <String> lst = new List <String>();
foreach (String name in AnalysisToolPak._functionsByName.Keys)
{
FreeRefFunction func = (FreeRefFunction)AnalysisToolPak._functionsByName[(name)];
if (func != null && (func is NotImplemented))
{
lst.Add(name);
}
}
return(lst.AsReadOnly()); //Collections.unmodifiableCollection(lst);
}