Disable Teleportation Between Worlds

Is it possible to disable teleportation between worlds? For example, if I'm in world "world1", I will not be able to /tp, /tphere, /tpa, /tpahere, /home, /back, /spawn to another "world2", and vice versa.

 

Code:java

public boolean onCommand(CommandSender sender, Command cmd, String cmdLine, String[] split) {
     if (cmd.getName().equalsIgnoreCase("tp")) || (cmd.getName().equalsIgnoreCase("tphere")) || cmd.getName().equalsIgnoreCase("home")) {
         Player t = getServer().matchPlayer(split[0]).get(0);
         if (sender instanceof Player) {
             Player player = (Player) sender;
              if (!t.getWorld().getName().equalsIgnoreCase(player.getWorld().getName())) {
                   player.sendMessage(ChatColor.RED + "That player is in another dimension!");
                   return true;
              }
         }
     }
     return false;
}

 

A more simple solution:

Code:java

public void onPlayerTeleport(PlayerTeleportEvent event) {
    if (event.getFrom().getWorld() != event.getTo().getWorld())
        event.setCancelled(true);
}

Remember to register a PLAYER_TELEPORT event.

 

Hmm looks like I posted this in the wrong forum. Sorry for any confusion! I meant to ask if any plugin did this, but still allowed teleportation from world to world via the use of portals from Multiverse.

 

Anyone?