From ea5c6f3effac81448223efd436bbb601c3b68aea Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 18 Aug 2018 21:09:39 -0400
Subject: [PATCH] EMC SpawnEggMeta#setSpawnedEntity API

lets you copy an entities data into a spawn egg.
Partial data is supported through a predicate, letting MC
follow normal spawn behavior in the summon phase.
---
 .../bukkit/inventory/meta/SpawnEggMeta.java   | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/src/main/java/org/bukkit/inventory/meta/SpawnEggMeta.java b/src/main/java/org/bukkit/inventory/meta/SpawnEggMeta.java
index 9ae84de4..f6ee31cd 100644
--- a/src/main/java/org/bukkit/inventory/meta/SpawnEggMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/SpawnEggMeta.java
@@ -9,6 +9,45 @@ import org.jetbrains.annotations.NotNull;
  */
 public interface SpawnEggMeta extends ItemMeta {
 
+    // Paper start
+
+    /**
+     * Copies the Entity as is into the spawn egg.
+     *
+     * All non positional data properties will be saved
+ * @param entity
+     */
+    default void setSpawnedEntity(org.bukkit.entity.Entity entity) {
+        setSpawnedEntity(entity, null);
+    }
+    /**
+     * Copies the Entity into the spawn egg, giving you
+     * control over which NBT Tags are to be saved.
+     *
+     * Note that while Mojang has made data properties more
+     * of a user facing detail, there is no guarantee that
+     * they will not change names between versions.
+     *
+     * If a key is filtered out, it will assume the default
+     * value upon spawn as a normal spawned entity of this type
+     * might receive. If one key is fitlered that has a strong
+     * relationship to another key, such as Villager Professions
+     * and Careers, you should filter them both/all to avoid buggy
+     * behavior in spawning the entity.
+     *
+     * Filtering by values is not supported.
+     *
+     * Certain keys such as "UUIDLeast", "UUIDMost", "Pos",
+     * "PortalCooldown", "Dimension"
+     *
+     * are default filtered.
+     *
+     * @param entity
+     * @param keyFilter
+     */
+    void setSpawnedEntity(org.bukkit.entity.Entity entity, java.util.function.Predicate<String> keyFilter);
+    // Paper end
+
     /**
      * Get the type of entity this egg will spawn.
      *
-- 
2.25.1.windows.1