public CreatureType getCreatureType(EntityType entityType) {
    if (Monster.class.isAssignableFrom(entityType.getEntityClass())
            || WaterMob.class.isAssignableFrom(entityType.getEntityClass())
            || Slime.class.isAssignableFrom(entityType.getEntityClass())
            || Ghast.class.isAssignableFrom(entityType.getEntityClass())
            ) {
        return CreatureType.MONSTER;
    } else if (Animals.class.isAssignableFrom(entityType.getEntityClass())) {
        return CreatureType.ANIMAL;
    } else if (Villager.class.isAssignableFrom(entityType.getEntityClass())) {
        return CreatureType.VILLAGER;
    } else if (Golem.class.isAssignableFrom(entityType.getEntityClass())) {
        return CreatureType.GOLEM;
    }
    return CreatureType.UNKNOWN;
}
 

@EventHandler(ignoreCancelled = true)
public void onCreatureSpawn(CreatureSpawnEvent event) {
    if (event == null || !plugin.getWorldManager().isSkyAssociatedWorld(event.getLocation().getWorld())) {
        return; // Bail out, we don't care
    }
    if (!event.isCancelled() && ADMIN_INITIATED.contains(event.getSpawnReason())) {
        return; // Allow it, the above method would have blocked it if it should be blocked.
    }
    checkLimits(event, event.getEntity().getType(), event.getLocation());
    if (event.getEntity() instanceof WaterMob) {
        Location loc = event.getLocation();
        if (isDeepOceanBiome(loc) && isPrismarineRoof(loc)) {
            loc.getWorld().spawnEntity(loc, EntityType.GUARDIAN);
            event.setCancelled(true);
        }
    }
    if (event.getSpawnReason() == CreatureSpawnEvent.SpawnReason.BUILD_WITHER && event.getEntity() instanceof Wither) {
        IslandInfo islandInfo = plugin.getIslandInfo(event.getLocation());
        if (islandInfo != null && islandInfo.getLeader() != null) {
            event.getEntity().setCustomName(I18nUtil.tr("{0}''s Wither", islandInfo.getLeader()));
            event.getEntity().setMetadata("fromIsland", new FixedMetadataValue(plugin, islandInfo.getName()));
        }
    }
}
 

public CreatureType getCreatureType(LivingEntity creature) {
    if (creature instanceof Monster
            || creature instanceof WaterMob
            || creature instanceof Slime
            || creature instanceof Ghast) {
        return CreatureType.MONSTER;
    } else if (creature instanceof Animals) {
        return CreatureType.ANIMAL;
    } else if (creature instanceof Villager) {
        return CreatureType.VILLAGER;
    } else if (creature instanceof Golem) {
        return CreatureType.GOLEM;
    }
    return CreatureType.UNKNOWN;
}