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Paper/Spigot-Server-Patches/0063-Handle-Item-Meta-Inconsistencies.patch
Shane Freeder 0ea3083817
Updated Upstream (Bukkit/CraftBukkit) 
Upstream has released updates that appear 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:
1e843b72 #510: Add NamespacedKey#fromString() to fetch from user input
a4d18241 #581: Add methods to modify despawn delay for wandering villagers

CraftBukkit Changes:
0cd8f19f #802: Add methods to modify despawn delay for wandering villagers
d5c5d998 SPIGOT-6362: ConcurrentModificationException: null --> Server Crash
8c7d69fe SPIGOT-5228: Entities that are removed during chunk unloads are not properly removed from the chunk.
2021-02-16 17:13:49 +00:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 28 May 2015 23:00:19 -0400
Subject: [PATCH] Handle Item Meta Inconsistencies
First, Enchantment order would blow away seeing 2 items as the same,
however the Client forces enchantment list in a certain order, as well
as does the /enchant command. Anvils can insert it into forced order,
causing 2 same items to be considered different.
This change makes unhandled NBT Tags and Enchantments use a sorted tree map,
so they will always be in a consistent order.
Additionally, the old enchantment API was never updated when ItemMeta
was added, resulting in 2 different ways to modify an items enchantments.
For consistency, the old API methods now forward to use the
ItemMeta API equivalents, and should deprecate the old API's.
diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index 7d98fe348d6b4a3bc2972217f9a9f0c9d902edbd..eee69f9ac8936cf7ad84629aba91bf09371762f3 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -9,6 +9,8 @@ import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
+import java.util.Collections;
+import java.util.Comparator;
import java.util.Locale;
import java.util.Objects;
import java.util.Optional;
@@ -66,6 +68,23 @@ public final class ItemStack {
private ShapeDetectorBlock n;
private boolean o;
+ // Paper start
+ private static final java.util.Comparator<? super NBTTagCompound> enchantSorter = java.util.Comparator.comparing(o -> o.getString("id"));
+ private void processEnchantOrder(NBTTagCompound tag) {
+ if (tag == null || !tag.hasKeyOfType("Enchantments", 9)) {
+ return;
+ }
+ NBTTagList list = tag.getList("Enchantments", 10);
+ if (list.size() < 2) {
+ return;
+ }
+ try {
+ //noinspection unchecked
+ list.sort((Comparator<? super NBTBase>) enchantSorter); // Paper
+ } catch (Exception ignored) {}
+ }
+ // Paper end
+
public ItemStack(IMaterial imaterial) {
this(imaterial, 1);
}
@@ -108,6 +127,7 @@ public final class ItemStack {
if (nbttagcompound.hasKeyOfType("tag", 10)) {
// CraftBukkit start - make defensive copy as this data may be coming from the save thread
this.tag = (NBTTagCompound) nbttagcompound.getCompound("tag").clone();
+ processEnchantOrder(this.tag); // Paper
this.getItem().b(this.tag);
// CraftBukkit end
}
@@ -626,6 +646,7 @@ public final class ItemStack {
// Paper end
public void setTag(@Nullable NBTTagCompound nbttagcompound) {
this.tag = nbttagcompound;
+ processEnchantOrder(this.tag); // Paper
if (this.getItem().usesDurability()) {
this.setDamage(this.getDamage());
}
@@ -716,6 +737,7 @@ public final class ItemStack {
nbttagcompound.setString("id", String.valueOf(IRegistry.ENCHANTMENT.getKey(enchantment)));
nbttagcompound.setShort("lvl", (short) ((byte) i));
nbttaglist.add(nbttagcompound);
+ processEnchantOrder(nbttagcompound); // Paper
}
public boolean hasEnchantments() {
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
index 721a1c6bd4505cb132e7004c45b795d4959389e3..9913d0136841dac35b6649cb1afbe1e93b36bf4c 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
@@ -178,28 +178,11 @@ public final class CraftItemStack extends ItemStack {
public void addUnsafeEnchantment(Enchantment ench, int level) {
Validate.notNull(ench, "Cannot add null enchantment");
- if (!makeTag(handle)) {
- return;
- }
- NBTTagList list = getEnchantmentList(handle);
- if (list == null) {
- list = new NBTTagList();
- handle.getTag().set(ENCHANTMENTS.NBT, list);
- }
- int size = list.size();
-
- for (int i = 0; i < size; i++) {
- NBTTagCompound tag = (NBTTagCompound) list.get(i);
- String id = tag.getString(ENCHANTMENTS_ID.NBT);
- if (id.equals(ench.getKey().toString())) {
- tag.setShort(ENCHANTMENTS_LVL.NBT, (short) level);
- return;
- }
- }
- NBTTagCompound tag = new NBTTagCompound();
- tag.setString(ENCHANTMENTS_ID.NBT, ench.getKey().toString());
- tag.setShort(ENCHANTMENTS_LVL.NBT, (short) level);
- list.add(tag);
+ // Paper start - Replace whole method
+ final ItemMeta itemMeta = getItemMeta();
+ itemMeta.addEnchant(ench, level, true);
+ setItemMeta(itemMeta);
+ // Paper end
}
static boolean makeTag(net.minecraft.server.ItemStack item) {
@@ -216,66 +199,33 @@ public final class CraftItemStack extends ItemStack {
@Override
public boolean containsEnchantment(Enchantment ench) {
- return getEnchantmentLevel(ench) > 0;
+ return hasItemMeta() && getItemMeta().hasEnchant(ench); // Paper - use meta
}
@Override
public int getEnchantmentLevel(Enchantment ench) {
- Validate.notNull(ench, "Cannot find null enchantment");
- if (handle == null) {
- return 0;
- }
- return EnchantmentManager.getEnchantmentLevel(CraftEnchantment.getRaw(ench), handle);
+ return hasItemMeta() ? getItemMeta().getEnchantLevel(ench) : 0; // Paper - replace entire method with meta
}
@Override
public int removeEnchantment(Enchantment ench) {
Validate.notNull(ench, "Cannot remove null enchantment");
- NBTTagList list = getEnchantmentList(handle), listCopy;
- if (list == null) {
- return 0;
- }
- int index = Integer.MIN_VALUE;
- int level = Integer.MIN_VALUE;
- int size = list.size();
-
- for (int i = 0; i < size; i++) {
- NBTTagCompound enchantment = (NBTTagCompound) list.get(i);
- String id = enchantment.getString(ENCHANTMENTS_ID.NBT);
- if (id.equals(ench.getKey().toString())) {
- index = i;
- level = 0xffff & enchantment.getShort(ENCHANTMENTS_LVL.NBT);
- break;
- }
- }
-
- if (index == Integer.MIN_VALUE) {
- return 0;
- }
- if (size == 1) {
- handle.getTag().remove(ENCHANTMENTS.NBT);
- if (handle.getTag().isEmpty()) {
- handle.setTag(null);
- }
- return level;
- }
-
- // This is workaround for not having an index removal
- listCopy = new NBTTagList();
- for (int i = 0; i < size; i++) {
- if (i != index) {
- listCopy.add(list.get(i));
- }
+ // Paper start - replace entire method
+ final ItemMeta itemMeta = getItemMeta();
+ int level = itemMeta.getEnchantLevel(ench);
+ if (level > 0) {
+ itemMeta.removeEnchant(ench);
+ setItemMeta(itemMeta);
}
- handle.getTag().set(ENCHANTMENTS.NBT, listCopy);
+ // Paper end
return level;
}
@Override
public Map<Enchantment, Integer> getEnchantments() {
- return getEnchantments(handle);
+ return hasItemMeta() ? getItemMeta().getEnchants() : ImmutableMap.<Enchantment, Integer>of(); // Paper - use Item Meta
}
static Map<Enchantment, Integer> getEnchantments(net.minecraft.server.ItemStack item) {
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
index 60e04343b4b10b1de0bbd033b148a9da41b66aad..9a41ad703ce382670f11cf84c4644d53f0e3cd1d 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaItem.java
@@ -6,6 +6,7 @@ import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.LinkedHashMultimap;
+import com.google.common.collect.ImmutableSortedMap; // Paper
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;
import com.google.common.collect.SetMultimap;
@@ -22,6 +23,7 @@ import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
+import java.util.Comparator; // Paper
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
@@ -32,6 +34,7 @@ import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Set;
+import java.util.TreeMap; // Paper
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Nonnull;
@@ -271,7 +274,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
private List<String> lore; // null and empty are two different states internally
private Integer customModelData;
private NBTTagCompound blockData;
- private Map<Enchantment, Integer> enchantments;
+ private EnchantmentMap enchantments; // Paper
private Multimap<Attribute, AttributeModifier> attributeModifiers;
private int repairCost;
private int hideFlag;
@@ -282,7 +285,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
private static final CraftPersistentDataTypeRegistry DATA_TYPE_REGISTRY = new CraftPersistentDataTypeRegistry();
private NBTTagCompound internalTag;
- private final Map<String, NBTBase> unhandledTags = new HashMap<String, NBTBase>();
+ private final Map<String, NBTBase> unhandledTags = new TreeMap<>(); // Paper
private CraftPersistentDataContainer persistentDataContainer = new CraftPersistentDataContainer(DATA_TYPE_REGISTRY);
private int version = CraftMagicNumbers.INSTANCE.getDataVersion(); // Internal use only
@@ -303,7 +306,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
this.blockData = meta.blockData;
if (meta.enchantments != null) { // Spigot
- this.enchantments = new LinkedHashMap<Enchantment, Integer>(meta.enchantments);
+ this.enchantments = new EnchantmentMap(meta.enchantments); // Paper
}
if (meta.hasAttributeModifiers()) {
@@ -386,13 +389,13 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
}
}
- static Map<Enchantment, Integer> buildEnchantments(NBTTagCompound tag, ItemMetaKey key) {
+ static EnchantmentMap buildEnchantments(NBTTagCompound tag, ItemMetaKey key) { // Paper
if (!tag.hasKey(key.NBT)) {
return null;
}
NBTTagList ench = tag.getList(key.NBT, CraftMagicNumbers.NBT.TAG_COMPOUND);
- Map<Enchantment, Integer> enchantments = new LinkedHashMap<Enchantment, Integer>(ench.size());
+ EnchantmentMap enchantments = new EnchantmentMap(); // Paper
for (int i = 0; i < ench.size(); i++) {
String id = ((NBTTagCompound) ench.get(i)).getString(ENCHANTMENTS_ID.NBT);
@@ -545,13 +548,13 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
}
}
- static Map<Enchantment, Integer> buildEnchantments(Map<String, Object> map, ItemMetaKey key) {
+ static EnchantmentMap buildEnchantments(Map<String, Object> map, ItemMetaKey key) { // Paper
Map<?, ?> ench = SerializableMeta.getObject(Map.class, map, key.BUKKIT, true);
if (ench == null) {
return null;
}
- Map<Enchantment, Integer> enchantments = new LinkedHashMap<Enchantment, Integer>(ench.size());
+ EnchantmentMap enchantments = new EnchantmentMap(); // Paper
for (Map.Entry<?, ?> entry : ench.entrySet()) {
// Doctor older enchants
String enchantKey = entry.getKey().toString();
@@ -803,14 +806,14 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
@Override
public Map<Enchantment, Integer> getEnchants() {
- return hasEnchants() ? ImmutableMap.copyOf(enchantments) : ImmutableMap.<Enchantment, Integer>of();
+ return hasEnchants() ? ImmutableSortedMap.copyOfSorted(enchantments) : ImmutableMap.<Enchantment, Integer>of(); // Paper
}
@Override
public boolean addEnchant(Enchantment ench, int level, boolean ignoreRestrictions) {
Validate.notNull(ench, "Enchantment cannot be null");
if (enchantments == null) {
- enchantments = new LinkedHashMap<Enchantment, Integer>(4);
+ enchantments = new EnchantmentMap(); // Paper
}
if (ignoreRestrictions || level >= ench.getStartLevel() && level <= ench.getMaxLevel()) {
@@ -1191,7 +1194,7 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
clone.customModelData = this.customModelData;
clone.blockData = this.blockData;
if (this.enchantments != null) {
- clone.enchantments = new LinkedHashMap<Enchantment, Integer>(this.enchantments);
+ clone.enchantments = new EnchantmentMap(this.enchantments); // Paper
}
if (this.hasAttributeModifiers()) {
clone.attributeModifiers = LinkedHashMultimap.create(this.attributeModifiers);
@@ -1423,4 +1426,22 @@ class CraftMetaItem implements ItemMeta, Damageable, Repairable, BlockDataMeta {
return HANDLED_TAGS;
}
}
+
+ // Paper start
+ private static class EnchantmentMap extends TreeMap<Enchantment, Integer> {
+ private EnchantmentMap(Map<Enchantment, Integer> enchantments) {
+ this();
+ putAll(enchantments);
+ }
+
+ private EnchantmentMap() {
+ super(Comparator.comparing(o -> o.getKey().toString()));
+ }
+
+ public EnchantmentMap clone() {
+ return (EnchantmentMap) super.clone();
+ }
+ }
+ // Paper end
+
}
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