block iterator example

    public void onProjectileHitListener(ProjectileHitEvent event)
    {
        Block blockhit = null;
        //blockhit = block actually hit by the egg.

        if(event.getEntityType() != EntityType.EGG)
            return;

        World world = event.getEntity().getWorld();
        BlockIterator iterator = new BlockIterator(world, event.getEntity().getLocation().toVector(), event.getEntity().getVelocity().normalize(), 0, 4);
        blockhit = null;

        while (iterator.hasNext())
        {
            blockhit = iterator.next();

            if (blockhit.getTypeId() != 0)
                break;
        }

        if(blockhit == null || blockhit.getType() == Material.GLASS)
            return;
    }