Blocking Cobblestone Generators?

I've been looking around for a while trying to find out how to get a cobblestone generator and how to block it from making cobblestone.. I couldn't find anything, so I tried doing it myself and here is what I got:

Code:

    @EventHandler
    public void BlockForm(BlockFromToEvent event) {
        int source = event.getBlock().getTypeId();
        Block block = event.getToBlock();
 
        if ((source == 11 || source == 10) && (block.getTypeId() == 9 || block.getTypeId() == 8)) {
            block.setType(Material.GOLD_BLOCK);  // just for testing
        }
    }

Does anyone know a way? It seems most plugins that have blocked them have become abandoned/outdated...

 

Code:java

@EventHandler
public void onFromTo(BlockFromToEvent event)
{
    int id = event.getBlock().getTypeId();
    if(id >= 8 && id <= 11)
    {
        Block b = event.getToBlock();
        int toid = b.getTypeId();
        if(toid == 0)
        {
            if(generatesCobble(id, b))
            {
                event.setCancelled(true);
            }
        }
    }
}
 
private final BlockFace[] faces = new BlockFace[]
    {
        BlockFace.SELF,
        BlockFace.UP,
        BlockFace.DOWN,
        BlockFace.NORTH,
        BlockFace.EAST,
        BlockFace.SOUTH,
        BlockFace.WEST
    };
 
public boolean generatesCobble(int id, Block b)
{
    int mirrorID1 = (id == 8 || id == 9 ? 10 : 8);
    int mirrorID2 = (id == 8 || id == 9 ? 11 : 9);
    for(BlockFace face : faces)
    {
        Block r = b.getRelative(face, 1);
        if(r.getTypeId() == mirrorID1 || r.getTypeId() == mirrorID2)
        {
            return true;
        }
    }
    return false;
}

 

fireblast709 knows everything xD Thanks!