Fixed bug where spawned arrows could throw

ArrayIndexOutOfBoundsException. Fixes #1171

Changelog.txt

@@ -29,6 +29,7 @@ Version 1.4.06-dev
  + Added information about /party itemshare and /party expshare to the party help page
  + Added option to use scoreboards for power level display instead of Spout.
  + Added permission node to prevent inspecting hidden players
+ = Fixed bug where spawned arrows could throw ArrayIndexOutOfBoundsException
  = Fixed bug where custom Spout titles were overwritten by mcMMO.
  = Fixed bug where Nether Quartz wasn't included in Smelting or item sharing
  = Fixed bug where players were able to join the same party multiple times

src/main/java/com/gmail/nossr50/listeners/EntityListener.java

@@ -28,6 +28,7 @@ import org.bukkit.event.entity.EntityTameEvent;
 import org.bukkit.event.entity.EntityTargetEvent;
 import org.bukkit.event.entity.ExplosionPrimeEvent;
 import org.bukkit.event.entity.FoodLevelChangeEvent;
+import org.bukkit.event.entity.ProjectileLaunchEvent;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.metadata.FixedMetadataValue;
 
@@ -59,19 +60,15 @@ public class EntityListener implements Listener {
 
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onEntityShootBow(EntityShootBowEvent event) {
-        ItemStack bow = event.getBow();
-
-        if (bow == null) {
-            return;
-        }
-
         Entity projectile = event.getProjectile();
 
         if (!(projectile instanceof Arrow)) {
             return;
         }
 
-        if (bow.containsEnchantment(Enchantment.ARROW_INFINITE)) {
+        ItemStack bow = event.getBow();
+
+        if (bow != null && bow.containsEnchantment(Enchantment.ARROW_INFINITE)) {
             projectile.setMetadata(mcMMO.infiniteArrowKey, mcMMO.metadataValue);
         }
 
@@ -79,6 +76,18 @@ public class EntityListener implements Listener {
         projectile.setMetadata(mcMMO.arrowDistanceKey, new FixedMetadataValue(plugin, Archery.locationToString(projectile.getLocation())));
     }
 
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onProjectileLaunch(ProjectileLaunchEvent event) {
+        Projectile projectile = event.getEntity();
+
+        if (!(projectile instanceof Arrow) || projectile.hasMetadata(mcMMO.bowForceKey)) {
+            return;
+        }
+
+        projectile.setMetadata(mcMMO.bowForceKey, new FixedMetadataValue(plugin, 1.0));
+        projectile.setMetadata(mcMMO.arrowDistanceKey, new FixedMetadataValue(plugin, Archery.locationToString(projectile.getLocation())));
+    }
+
     /**
      * Monitor EntityChangeBlock events.
      *