@Override
    public IQHandlerInfo getInfo() {
        return info;
    }
IQDiscoItemsHandler is responsible for handling disco#items requests. This class holds a map with
the main entities and the associated DiscoItemsProvider. We are considering the host of the
recipient JIDs as main entities. It's the DiscoItemsProvider responsibility to provide the items
associated with the JID's name together with any possible requested node.
<p>
For example, let's have in the entities map the following entries: "localhost" and
"conference.localhost". Associated with each entry we have different DiscoItemsProvider. Now we
receive a disco#items request for the following JID: "room@conference.localhost" which is a disco
request for a MUC room. So IQDiscoItemsHandler will look for the DiscoItemsProvider associated
with the JID's host which in this case is "conference.localhost". Once we have located the
provider we will delegate to the provider the responsibility to provide the items specific to
the JID's name which in this case is "room". Depending on the implementation, the items could be
the list of existing occupants if that information is publicly available. Finally, after we have
collected all the items provided by the provider we will add them to the reply. On the other
hand, if no provider was found or the provider has no information for the requested name/node
then a not-found error will be returned.</p>
<p>
Publishing of client items is still not supported.
</p>

@author Gaston Dombiak
xmppserver/src/main/java/org/jivesoftware/openfire/disco/IQDiscoItemsHandler.java