Need A Little Help

Hey,

I am currently trying to add a feature to my plugin but cant get it to work. It should be simple, but it just isn't working right. I need to make it so when a player has a glass block on their head it allows them to stay underwater indefinitely. If anyone is interested in helping me with this, send me a message.
Here is the plugin I am trying to add the feature to: http://tinyurl.com/blockhat

Thanks

 

Code:

public void onEntityDamage(EntityDamageEvent event){
if(event.getCause().toString().equals("DROWNING"){
if(player.getInventory().getHelmet().equals(Material.GLASS)){
event.setCancelled(true);
}
}

Pretty sure this doesn't work exactly like this, but something like that should work.

 

@nmc94

Code:

public void onEntityDamage(EntityDamageEvent event)
{
    if(event.getEntity() instanceof Player && event.getCause() == DROWNING) {
        Player p = (Player) event.getEntity();
        if(p.getInventory().getHelmet().getTypeId() == 20) {
            event.setCancelled(true)
        }
    }