How can I get the MO from UID passed from browser?

The browser passes the UID, such as HostSystem:host-31 to the controller, but, when we get it, we need to split the string and set the MO's type and value with the splited list.

This is really ugly, if there is some change in the UID structure, programe would fail.

Is there any official tool to convert or construct a MO , or to get the MO with the referrence service from the UID?