src/main/java/org/jivesoftware/smack/UserRoster.java
public Presence getPresenceResource(String userWithResource) {
        String key = getPresenceMapKey(userWithResource);
        String resource = StringUtils.parseResource(userWithResource);
        Map<String, Presence> userPresences = presenceMap.get(key);
        if (userPresences == null) {
            Presence presence = new Presence(Presence.Type.unavailable);
            presence.setFrom(userWithResource);
            return presence;
        } else {
            Presence presence = userPresences.get(resource);
            if (presence == null) {
                presence = new Presence(Presence.Type.unavailable);
                presence.setFrom(userWithResource);
                return presence;
            } else {
                return presence;
            }
        }
    }
public Presence getPresenceResource(String userWithResource) {
        String key = getPresenceMapKey(userWithResource);
        String resource = StringUtils.parseResource(userWithResource);
        Map<String, Presence> userPresences = presenceMap.get(key);
        if (userPresences == null) {
            Presence presence = new Presence(Presence.Type.unavailable);
            presence.setFrom(userWithResource);
            return presence;
        } else {
            Presence presence = userPresences.get(resource);
            if (presence == null) {
                presence = new Presence(Presence.Type.unavailable);
                presence.setFrom(userWithResource);
                return presence;
            } else {
                return presence;
            }
        }
    }
public Presence getPresenceResource ( String userWithResource ) { String key = getPresenceMapKey ( userWithResource ) ; String resource = StringUtils . parseResource ( userWithResource ) ; Map < String , Presence > userPresences = presenceMap . get ( key ) ; if ( userPresences == null ) { Presence presence = new Presence ( Presence . Type . unavailable ) ; presence . setFrom ( userWithResource ) ; return presence ; } else { Presence presence = userPresences . get ( resource ) ; if ( presence == null ) { presence = new Presence ( Presence . Type . unavailable ) ; presence . setFrom ( userWithResource ) ; return presence ; } else { return presence ; } } }
Returns the presence info for a particular user's resource, or
unavailable presence if the user is offline or if no presence information
is available, such as when you are not subscribed to the user's presence
updates.

@param userWithResource
a fully qualified XMPP ID including a resource
(user@domain/resource).
@return the user's current presence, or unavailable presence if the user
is offline or if no presence information is available.
Returns the presence info for a particular user s resource or unavailable presence if the user is offline or if no presence information is available such as when you are not subscribed to the user s presence updates .