Paper/Spigot-Server-Patches/0231-Fix-CraftEntity-hashCode.patch
Spottedleaf c68dbb864c Updated Upstream (Bukkit/CraftBukkit/Spigot) (#2576)
* Updated Upstream (Bukkit/CraftBukkit/Spigot)

Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
6527cb58 SPIGOT-5329: Clarify isGlowing documentation
5ddb414f Make Lantern extend BlockData
cb888903 Fix typos in previous commits
2a5e0ca2 Bring EnchantItemEvent documentation in line with EnchantmentOffer
3c5fcea2 SPIGOT-5317: Create accessors for player absorption hearts
c6e0d625 SPIGOT-5320: Clarify scope of ExactChoice

CraftBukkit Changes:
a3fdef8c SPIGOT-5331: Add support for Java 13
6ddeb980 SPIGOT-5317: Create accessors for player absorption hearts
5d335e96 SPIGOT-5315: Cannot serialize armor stand ItemMeta

Spigot Changes:
94af569b SPIGOT-5319: Async catcher for getNearbyEntities
2019-09-21 23:12:45 -05:00

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1.8 KiB
Diff

From c08536aeb0cb0387c9b623a5b4df96df67131771 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 10 Jun 2018 20:20:15 -0400
Subject: [PATCH] Fix CraftEntity hashCode
hashCodes are not allowed to change, however bukkit used a value
that does change, the entityId.
When an entity is teleported dimensions, the entity reference is
replaced with a new one with a new entity ID.
For hashCode, we can simply use the UUID's hashCode to keep
the hashCode from changing.
equals() is ok to use getEntityId() because equals() should only
be true if both the left and right are the same reference.
Since entity ids can not duplicate during runtime, this
check is essentially the same as this.getHandle() == other.getHandle()
However, replaced it too to make it clearer of intent.
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index 09ca9a3eb..517e42218 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -721,14 +721,15 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
return false;
}
final CraftEntity other = (CraftEntity) obj;
- return (this.getEntityId() == other.getEntityId());
+ return (this.getHandle() == other.getHandle()); // Paper - while logically the same, this is clearer
}
+ // Paper - Fix hashCode. entity ID's are not static.
+ // A CraftEntity can change reference to a new entity with a new ID, and hash codes should never change
@Override
public int hashCode() {
- int hash = 7;
- hash = 29 * hash + this.getEntityId();
- return hash;
+ return getUniqueId().hashCode();
+ // Paper end
}
@Override
--
2.22.1