@Override
    public GroupProvider getGroupProvider(String groupname)
    {
        if (providers.containsKey(groupname)) {
            return providers.get(groupname);
        }
        return providers.get(null);
    }
A mapper that can be used with the TestUserProvider implementations.

@author Guus der Kinderen, guus@goodbytes.nl
xmppserver/src/test/java/org/jivesoftware/openfire/group/TestGroupProviderMapper.java