How can I realize authentication in jackrabbit?

[yanjie]

Hi everyone:
I want to give a user some policy to handle a node(read or write or modify..) , 
and other users don't have the policy . Or a group has the policy and the users 
in the group all have the authentication . how can I use jackrabbit to realize 
it? 

Thanks.

2009-02-26 



yanjie