[JDEV] Can I get roster of certain group?

[Ru-Shan Cheng]

Can I get roster of certain group?

I want to do some changes to jabber server that can send certain group's roster to client only.
For example, my roster have 3 groups : A, B, C, then I get the roster of A group when
I login in A resource.

In other words, I want to get different roster by different group when I login the
different resource.

How can I achive this function?
ex: 
	1.Change group definition in xml?
	   ex: <iq type='get'> <query xmlns='jabber:iq:roster:group'>
	   					   <query xmlns='jabber:iq:group'>
			or	   					   
	   	   <iq type='group_roster'> ?
	2. Other method?
	
What kind of solutions will cost less efforts or form better architecture?

Any pointers or suggestions will be helpful. :)
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