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"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
47 lines
1.9 KiB
Diff
47 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 10 Jun 2018 20:20:15 -0400
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Subject: [PATCH] Fix CraftEntity hashCode
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hashCodes are not allowed to change, however bukkit used a value
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that does change, the entityId.
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When an entity is teleported dimensions, the entity reference is
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replaced with a new one with a new entity ID.
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For hashCode, we can simply use the UUID's hashCode to keep
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the hashCode from changing.
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equals() is ok to use getEntityId() because equals() should only
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be true if both the left and right are the same reference.
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Since entity ids can not duplicate during runtime, this
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check is essentially the same as this.getHandle() == other.getHandle()
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However, replaced it too to make it clearer of intent.
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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index e132d38199766e3e787169501d8bb05964506e0f..16e8cfb21f090e0c17e55c1b45ff56bed01839eb 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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@@ -784,14 +784,15 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
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return false;
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}
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final CraftEntity other = (CraftEntity) obj;
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- return (this.getEntityId() == other.getEntityId());
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+ return (this.getHandle() == other.getHandle()); // Paper - while logically the same, this is clearer
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}
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+ // Paper - Fix hashCode. entity ID's are not static.
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+ // A CraftEntity can change reference to a new entity with a new ID, and hash codes should never change
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@Override
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public int hashCode() {
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- int hash = 7;
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- hash = 29 * hash + this.getEntityId();
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- return hash;
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+ return getUniqueId().hashCode();
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+ // Paper end
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}
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@Override
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