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path: root/nms-patches/EntityCow.patch
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--- a/net/minecraft/server/EntityCow.java
+++ b/net/minecraft/server/EntityCow.java
@@ -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) {
@@ -50,12 +55,22 @@
 
     public boolean a(EntityHuman entityhuman, EnumHand enumhand, ItemStack itemstack) {
         if (itemstack != null && itemstack.getItem() == Items.BUCKET && !entityhuman.abilities.canInstantlyBuild && !this.isBaby()) {
+            // 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());
             entityhuman.a(SoundEffects.ap, 1.0F, 1.0F);
-            if (--itemstack.count == 0) {
-                entityhuman.a(enumhand, new ItemStack(Items.MILK_BUCKET));
-            } else if (!entityhuman.inventory.pickup(new ItemStack(Items.MILK_BUCKET))) {
-                entityhuman.drop(new ItemStack(Items.MILK_BUCKET), false);
+            if (--itemstack.count <= 0) {
+                entityhuman.a(enumhand, result);
+            } else if (!entityhuman.inventory.pickup(result)) {
+                entityhuman.drop(result, false);
             }
+            // CraftBukkit end
 
             return true;
         } else {