/**
* <summary>
* Checks if the function is currently reachable, without raising any error.
* <para>
* If there is a cached value for the function in cache, that has not yet
* expired, the device is considered reachable.
* No exception is raised if there is an error while trying to contact the
* device hosting the function.
* </para>
* <para>
* </para>
* </summary>
* <returns>
* <c>true</c> if the function can be reached, and <c>false</c> otherwise
* </returns>
*/
public bool isOnline()
{
if (_func == null)
{
return(false);
}
return(_func.isOnline());
}
public static YFunctionProxy FindFunction(string name)
{
// cases to handle:
// name ="" no matching unknwn
// name ="" unknown exists
// name != "" no matching unknown
// name !="" unknown exists
YFunction func = null;
YFunctionProxy res = (YFunctionProxy)YFunctionProxy.FindSimilarUnknownFunction("YFunctionProxy");
if (name == "")
{
if (res != null)
{
return(res);
}
res = (YFunctionProxy)YFunctionProxy.FindSimilarKnownFunction("YFunctionProxy");
if (res != null)
{
return(res);
}
func = YFunction.FirstFunction();
if (func != null)
{
name = func.get_hardwareId();
if (func.get_userData() != null)
{
return((YFunctionProxy)func.get_userData());
}
}
}
else
{
func = YFunction.FindFunction(name);
if (func.get_userData() != null)
{
return((YFunctionProxy)func.get_userData());
}
}
if (res == null)
{
res = new YFunctionProxy(func, name);
}
if (func != null)
{
res.linkToHardware(name);
if (func.isOnline())
{
res.arrival();
}
}
return(res);
}
protected static void _UpdateValueCallbackList(YFunction func, Boolean add)
{
if (add)
{
func.isOnline();
if (!_ValueCallbackList.Contains(func))
{
_ValueCallbackList.Add(func);
}
}
else
{
_ValueCallbackList.Remove(func);
}
}
