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path: root/nms-patches/ItemMonsterEgg.patch
blob: cd535c79a424aca30a9b2906d33a167474f6edc4 (plain)
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--- a/net/minecraft/server/ItemMonsterEgg.java
+++ b/net/minecraft/server/ItemMonsterEgg.java
@@ -131,6 +131,10 @@
 
     @Nullable
     public static Entity a(World world, @Nullable String s, double d0, double d1, double d2) {
+        return spawnCreature(world, s, d0, d1, d2, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.SPAWNER_EGG);
+    }
+
+    public static Entity spawnCreature(World world, String s, double d0, double d1, double d2, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason) {
         if (s != null && EntityTypes.eggInfo.containsKey(s)) {
             Entity entity = null;
 
@@ -143,8 +147,13 @@
                     entityinsentient.aQ = entityinsentient.yaw;
                     entityinsentient.aO = entityinsentient.yaw;
                     entityinsentient.prepare(world.D(new BlockPosition(entityinsentient)), (GroupDataEntity) null);
-                    world.addEntity(entity);
-                    entityinsentient.D();
+                    // CraftBukkit start - don't return an entity when CreatureSpawnEvent is canceled
+                    if (!world.addEntity(entity, spawnReason)) {
+                        entity = null;
+                    } else {
+                        entityinsentient.D();
+                    }
+                    // CraftBukkit end
                 }
             }