Paper/Spigot-Server-Patches/0132-Optimise-BlockStateEnum-hashCode-and-equals.patch

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From 5954bc01e73be3868d879fe2fa37c67819cacb61 Mon Sep 17 00:00:00 2001
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From: Alfie Cleveland <alfeh@me.com>
Date: Fri, 19 Aug 2016 01:52:56 +0100
2016-09-01 00:18:54 +02:00
Subject: [PATCH] Optimise BlockStateEnum hashCode and equals
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diff --git a/src/main/java/net/minecraft/server/BlockStateEnum.java b/src/main/java/net/minecraft/server/BlockStateEnum.java
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index 725087de59..5e6cb5d7de 100644
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--- a/src/main/java/net/minecraft/server/BlockStateEnum.java
+++ b/src/main/java/net/minecraft/server/BlockStateEnum.java
@@ -17,6 +17,11 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends BlockState<T>
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private final ImmutableSet<T> a;
private final Map<String, T> b = Maps.newHashMap();
+ // Paper start - BlockStateEnum is a singleton, so we can use our own hashCode
+ private static int hashId = 0;
+ private int hashCode;
+ // Paper end
+
protected BlockStateEnum(String s, Class<T> oclass, Collection<T> collection) {
super(s, oclass);
this.a = ImmutableSet.copyOf(collection);
@@ -30,9 +35,10 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends BlockState<T>
throw new IllegalArgumentException("Multiple values have the same name \'" + s1 + "\'");
}
- this.b.put(s1, oenum);
+ this.b.put(s1, (T) oenum); // Paper - decompile fix
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}
+ this.hashCode = hashId++; // Paper
}
public Collection<T> d() {
@@ -47,24 +53,14 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends BlockState<T>
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return ((INamable) t0).getName();
}
+ @Override // Paper start - override equals as BlockStateEnum is a singleton
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public boolean equals(Object object) {
- if (this == object) {
- return true;
- } else if (object instanceof BlockStateEnum && super.equals(object)) {
- BlockStateEnum blockstateenum = (BlockStateEnum) object;
-
- return this.a.equals(blockstateenum.a) && this.b.equals(blockstateenum.b);
- } else {
- return false;
- }
+ return this == object;
+ // Paper end - override equals as BlockStateEnum is a singleton
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}
public int c() {
- int i = super.c();
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-
- i = 31 * i + this.a.hashCode();
- i = 31 * i + this.b.hashCode();
- return i;
+ return hashCode; // Paper - hashCode method is final, but we can do this here
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}
public static <T extends Enum<T> & INamable> BlockStateEnum<T> of(String s, Class<T> oclass) {
--
2.18.0
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