public String[] getFilterParams()
    {
        return new String[] {
            FILTER_NODE_IDENTIFIER,
            FILTER_NODE_NAME,
            FILTER_NODE_DESCRIPTION,
            FILTER_ITEM_COUNT,
            FILTER_AFFILIATE_COUNT,
            FILTER_SUBSCRIBER_COUNT
        };
    }
Generates a collection of all parameter names that can be used for filtering.

@return all filter parameter names.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/PubsubNodeResultFilter.java