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path: root/nms-patches/EntityCow.patch
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--- ../work/decompile-bb26c12b/net/minecraft/server/EntityCow.java	2014-11-27 08:59:46.657422040 +1100
+++ src/main/java/net/minecraft/server/EntityCow.java	2014-11-27 08:42:10.168850880 +1100
@@ -1,5 +1,10 @@
 package net.minecraft.server;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+// CraftBukkit end
+
 public class EntityCow extends EntityAnimal {
 
     public EntityCow(World world) {
@@ -69,13 +74,23 @@
 
     public boolean a(EntityHuman entityhuman) {
         ItemStack itemstack = entityhuman.inventory.getItemInHand();
-
+        
         if (itemstack != null && itemstack.getItem() == Items.BUCKET && !entityhuman.abilities.canInstantlyBuild) {
-            if (itemstack.count-- == 1) {
-                entityhuman.inventory.setItem(entityhuman.inventory.itemInHandIndex, new ItemStack(Items.MILK_BUCKET));
-            } else if (!entityhuman.inventory.pickup(new ItemStack(Items.MILK_BUCKET))) {
-                entityhuman.drop(new ItemStack(Items.MILK_BUCKET, 1, 0), false);
+            // CraftBukkit start - Got milk?
+            org.bukkit.Location loc = this.getBukkitEntity().getLocation();
+            org.bukkit.event.player.PlayerBucketFillEvent event = CraftEventFactory.callPlayerBucketFillEvent(entityhuman, loc.getBlockX(), loc.getBlockY(), loc.getBlockZ(), null, itemstack, Items.MILK_BUCKET);
+
+            if (event.isCancelled()) {
+                return false;
+            }
+
+            ItemStack result = CraftItemStack.asNMSCopy(event.getItemStack());
+            if (--itemstack.count <= 0) {
+                entityhuman.inventory.setItem(entityhuman.inventory.itemInHandIndex, result);
+            } else if (!entityhuman.inventory.pickup(result)) {
+                entityhuman.drop(result, false);
             }
+            // CraftBukkit end
 
             return true;
         } else {