Are there some APIs for getting all objects in specified folder?

[Huang Peng]

Hi DBUS developers,
        
Are there some APIs for getting all objects in specified folder of
DBUS's filesystem? If the answer is yes, could I get a notification when
a new object is putted in this specified folder? 

For example: I want listen changes of folder "/org/freedesktop/IME/". If
an object which path is "/org/freedesktop/IME/ObjectName" is created or
removed, could I received a notification for the change?
        
Thanks,
Huang Peng