ArenaClass oldAC = arena.getArenaPlayer(p).getArenaClass();
if (ac.equals(oldAC)) return true;
// If the new class is full, inform the player.
ClassLimitManager clm = arena.getClassLimitManager();
if (!clm.canPlayerJoinClass(ac)) {
Messenger.tell(p, Msg.LOBBY_CLASS_FULL);
return true;
}
// Check price, balance, and inform