Creating an explosion if entity hits a wall

I am currently using this code:

Code:

Entity snowball = player.getWorld().spawnEntity(loc.add(loc.getDirection).add(0, 1.5, 0), EntityType.SNOWBALL)
            snowball.setVelocity(loc.getDirection())
            new BukkitRunnable {
              override def run(): Unit = {
                Location loc = snowball.getLocation()
                Boolean c = true

                while (c) {
                  if (loc.equals(snowball.getLocation())) c = false
                  loc = snowball.getLocation()
                }

                loc.getWorld().createExplosion(loc, 3, true)
              }
            }.runTaskAsynchronously(plugin)

The problem is that it will shoot a snowball and create an explosion around me.
Is there a way to check if the snowball hit a wall?

 

@DS_STORE Yes there is, but more importantly stop violating thread safety and your code won't even compile.

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Use ProjectileHitEvent

 

It may not compile because its some pseudo java i transscriped from my compiling scala source
Thank you <3