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Paper/patches/api/0236-Add-RegistryAccess-for-managing-registries.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 2 Mar 2022 13:36:21 -0800
Subject: [PATCH] Add RegistryAccess for managing registries
diff --git a/src/main/java/io/papermc/paper/registry/Reference.java b/src/main/java/io/papermc/paper/registry/Reference.java
new file mode 100644
index 0000000000000000000000000000000000000000..d8656772e0c983df7c40ddc367a73ce473348339
--- /dev/null
+++ b/src/main/java/io/papermc/paper/registry/Reference.java
@@ -0,0 +1,47 @@
+package io.papermc.paper.registry;
+
+import org.bukkit.Keyed;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Represents a reference to a server-backed registry value that may
+ * change.
+ *
+ * @param <T> type of the value
+ */
+@Deprecated(forRemoval = true, since = "1.20.6")
+public interface Reference<T extends Keyed> extends Keyed {
+
+ /**
+ * Gets the value from the registry with the key.
+ *
+ * @return the value
+ * @throws java.util.NoSuchElementException if there is no value with this key
+ */
+ @Deprecated(forRemoval = true, since = "1.20.6")
+ @NotNull T value();
+
+ /**
+ * Gets the value from the registry with the key.
+ *
+ * @return the value or null if it doesn't exist
+ */
+ @Deprecated(forRemoval = true, since = "1.20.6")
+ @Nullable T valueOrNull();
+
+ /**
+ * Creates a reference to a registered value.
+ *
+ * @param registry the registry the value is located in
+ * @param key the key to the value
+ * @param <T> the type of the value
+ * @return a reference
+ */
+ @Deprecated(forRemoval = true, since = "1.20.6")
+ static <T extends Keyed> @NotNull Reference<T> create(@NotNull Registry<T> registry, @NotNull NamespacedKey key) {
+ return new ReferenceImpl<>(registry, key);
+ }
+}
diff --git a/src/main/java/io/papermc/paper/registry/ReferenceImpl.java b/src/main/java/io/papermc/paper/registry/ReferenceImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..f29e76a6b66ddfec12ddf8db6dcb2df6083b5982
--- /dev/null
+++ b/src/main/java/io/papermc/paper/registry/ReferenceImpl.java
@@ -0,0 +1,31 @@
+package io.papermc.paper.registry;
+
+import org.bukkit.Keyed;
+import org.bukkit.NamespacedKey;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.NoSuchElementException;
+
+record ReferenceImpl<T extends Keyed>(@NotNull Registry<T> registry, @NotNull NamespacedKey key) implements Reference<T> {
+
+ @Override
+ public @NotNull T value() {
+ final T value = this.registry.get(this.key);
+ if (value == null) {
+ throw new NoSuchElementException("No such value with key " + this.key);
+ }
+ return value;
+ }
+
+ @Override
+ public @Nullable T valueOrNull() {
+ return this.registry.get(this.key);
+ }
+
+ @Override
+ public @NotNull NamespacedKey getKey() {
+ return this.key;
+ }
+}
diff --git a/src/main/java/io/papermc/paper/registry/RegistryAccess.java b/src/main/java/io/papermc/paper/registry/RegistryAccess.java
new file mode 100644
index 0000000000000000000000000000000000000000..86ab67ff5023bf6adea80b02648b6f67476e30e5
--- /dev/null
+++ b/src/main/java/io/papermc/paper/registry/RegistryAccess.java
@@ -0,0 +1,49 @@
+package io.papermc.paper.registry;
+
+import org.bukkit.Keyed;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Used for accessing different {@link Registry} instances
+ * by a {@link RegistryKey}. Get the main instance of {@link RegistryAccess}
+ * with {@link RegistryAccess#registryAccess()}.
+ */
+@ApiStatus.NonExtendable
+public interface RegistryAccess {
+
+ /**
+ * Get the {@link RegistryAccess} instance for the server.
+ *
+ * @return the RegistryAccess instance
+ */
+ static @NotNull RegistryAccess registryAccess() {
+ return RegistryAccessHolder.INSTANCE.orElseThrow(() -> new IllegalStateException("No RegistryAccess implementation found"));
+ }
+
+ /**
+ * Gets the registry based on the type.
+ *
+ * @param type the type
+ * @return the registry or null if none found
+ * @param <T> the type
+ * @deprecated use {@link #getRegistry(RegistryKey)} with keys from {@link RegistryKey}
+ */
+ @Deprecated(since = "1.20.6", forRemoval = true)
+ <T extends Keyed> @Nullable Registry<T> getRegistry(@NotNull Class<T> type);
+
+ /**
+ * Gets the registry with the specified key.
+ *
+ * @param registryKey the key
+ * @return the registry
+ * @param <T> the type
+ * @throws java.util.NoSuchElementException if no registry with the key is found
+ * @throws IllegalArgumentException if the registry is not available yet
+ */
+ // Future note: We should have no trouble removing this generic qualifier when
+ // registry types no longer have to be "keyed" as it shouldn't break ABI or API.
+ <T extends Keyed> @NotNull Registry<T> getRegistry(@NotNull RegistryKey<T> registryKey);
+}
diff --git a/src/main/java/io/papermc/paper/registry/RegistryAccessHolder.java b/src/main/java/io/papermc/paper/registry/RegistryAccessHolder.java
new file mode 100644
index 0000000000000000000000000000000000000000..b89e19c070f97c9662f1e16309446494b30aa7c9
--- /dev/null
+++ b/src/main/java/io/papermc/paper/registry/RegistryAccessHolder.java
@@ -0,0 +1,12 @@
+package io.papermc.paper.registry;
+
+import java.util.Optional;
+import java.util.ServiceLoader;
+
+final class RegistryAccessHolder {
+
+ static final Optional<RegistryAccess> INSTANCE = ServiceLoader.load(RegistryAccess.class).findFirst();
+
+ private RegistryAccessHolder() {
+ }
+}
diff --git a/src/main/java/io/papermc/paper/registry/RegistryKeyImpl.java b/src/main/java/io/papermc/paper/registry/RegistryKeyImpl.java
index 791813220b2504214b1adecc69093cd600fb0f8c..47fe5b0d5d031110c27210a0a256c260b35d9ba1 100644
--- a/src/main/java/io/papermc/paper/registry/RegistryKeyImpl.java
+++ b/src/main/java/io/papermc/paper/registry/RegistryKeyImpl.java
@@ -10,6 +10,17 @@ record RegistryKeyImpl<T>(@NotNull Key key) implements RegistryKey<T> {
static final Set<RegistryKey<?>> REGISTRY_KEYS = Sets.newIdentityHashSet();
+ // override equals and hashCode to this can be used to simulate an "identity" hashmap
+ @Override
+ public boolean equals(final Object obj) {
+ return obj == this;
+ }
+
+ @Override
+ public int hashCode() {
+ return System.identityHashCode(this);
+ }
+
static <T> RegistryKey<T> create(@Subst("some_key") final String key) {
final RegistryKey<T> registryKey = createInternal(key);
REGISTRY_KEYS.add(registryKey);
diff --git a/src/main/java/org/bukkit/Bukkit.java b/src/main/java/org/bukkit/Bukkit.java
index 188280a8fdf35a70a5a358f8cfe7cf44f05855b1..ceaa901fa830e904d6ac7a1727d1e7d185107e11 100644
--- a/src/main/java/org/bukkit/Bukkit.java
+++ b/src/main/java/org/bukkit/Bukkit.java
@@ -2407,8 +2407,11 @@ public final class Bukkit {
* @param tClass of the registry to get
* @param <T> type of the registry
* @return the corresponding registry or null if not present
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)}
+ * with keys from {@link io.papermc.paper.registry.RegistryKey}
*/
@Nullable
+ @Deprecated(since = "1.20.6")
public static <T extends Keyed> Registry<T> getRegistry(@NotNull Class<T> tClass) {
return server.getRegistry(tClass);
}
diff --git a/src/main/java/org/bukkit/Registry.java b/src/main/java/org/bukkit/Registry.java
index 3effaea369d9c7a6a22979fbfc270f55f9f25cf2..93e898c14728491a59bb2d08aff0dd678feef26a 100644
--- a/src/main/java/org/bukkit/Registry.java
+++ b/src/main/java/org/bukkit/Registry.java
@@ -102,7 +102,7 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* @apiNote BlockType is not ready for public usage yet
*/
@ApiStatus.Internal
- Registry<BlockType> BLOCK = Objects.requireNonNull(Bukkit.getRegistry(BlockType.class), "No registry present for BlockType. This is a bug.");
+ Registry<BlockType> BLOCK = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.BLOCK); // Paper
/**
* Custom boss bars.
*
@@ -139,8 +139,10 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* Server enchantments.
*
* @see Enchantment
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#ENCHANTMENT}
*/
- Registry<Enchantment> ENCHANTMENT = Objects.requireNonNull(Bukkit.getRegistry(Enchantment.class), "No registry present for Enchantment. This is a bug.");
+ @Deprecated(since = "1.21")
+ Registry<Enchantment> ENCHANTMENT = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(Enchantment.class), "No registry present for Enchantment. This is a bug."); // Paper
/**
* Server entity types.
*
@@ -152,7 +154,7 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
*
* @see MusicInstrument
*/
- Registry<MusicInstrument> INSTRUMENT = Objects.requireNonNull(Bukkit.getRegistry(MusicInstrument.class), "No registry present for MusicInstrument. This is a bug.");
+ Registry<MusicInstrument> INSTRUMENT = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.INSTRUMENT); // Paper
/**
* Server item types.
*
@@ -160,7 +162,7 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* @apiNote ItemType is not ready for public usage yet
*/
@ApiStatus.Internal
- Registry<ItemType> ITEM = Objects.requireNonNull(Bukkit.getRegistry(ItemType.class), "No registry present for ItemType. This is a bug.");
+ Registry<ItemType> ITEM = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.ITEM); // Paper
/**
* Default server loot tables.
*
@@ -178,7 +180,7 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
*
* @see PotionEffectType
*/
- Registry<PotionEffectType> EFFECT = Objects.requireNonNull(Bukkit.getRegistry(PotionEffectType.class), "No registry present for PotionEffectType. This is a bug.");
+ Registry<PotionEffectType> EFFECT = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.MOB_EFFECT); // Paper
/**
* Server particles.
*
@@ -201,14 +203,16 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* Server structures.
*
* @see Structure
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#STRUCTURE}
*/
- Registry<Structure> STRUCTURE = Bukkit.getRegistry(Structure.class);
+ @Deprecated(since = "1.20.6") // Paper
+ Registry<Structure> STRUCTURE = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(Structure.class), "No registry present for Structure. This is a bug."); // Paper
/**
* Server structure types.
*
* @see StructureType
*/
- Registry<StructureType> STRUCTURE_TYPE = Bukkit.getRegistry(StructureType.class);
+ Registry<StructureType> STRUCTURE_TYPE = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.STRUCTURE_TYPE); // Paper
/**
* Sound keys.
*
@@ -219,28 +223,35 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* Trim materials.
*
* @see TrimMaterial
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#TRIM_MATERIAL}
*/
- Registry<TrimMaterial> TRIM_MATERIAL = Bukkit.getRegistry(TrimMaterial.class);
+ @Deprecated(since = "1.20.6") // Paper
+ Registry<TrimMaterial> TRIM_MATERIAL = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(TrimMaterial.class), "No registry present for TrimMaterial. This is a bug."); // Paper
/**
* Trim patterns.
*
* @see TrimPattern
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#TRIM_PATTERN}
*/
- Registry<TrimPattern> TRIM_PATTERN = Bukkit.getRegistry(TrimPattern.class);
+ @Deprecated(since = "1.20.6")
+ Registry<TrimPattern> TRIM_PATTERN = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(TrimPattern.class), "No registry present for TrimPattern. This is a bug."); // Paper
/**
* Damage types.
*
* @see DamageType
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#DAMAGE_TYPE}
*/
- @ApiStatus.Experimental
- Registry<DamageType> DAMAGE_TYPE = Objects.requireNonNull(Bukkit.getRegistry(DamageType.class), "No registry present for DamageType. This is a bug.");
+ @Deprecated(since = "1.20.6")
+ Registry<DamageType> DAMAGE_TYPE = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(DamageType.class), "No registry present for DamageType. This is a bug."); // Paper
/**
* Jukebox songs.
*
* @see JukeboxSong
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#JUKEBOX_SONG}
*/
@ApiStatus.Experimental
- Registry<JukeboxSong> JUKEBOX_SONG = Objects.requireNonNull(Bukkit.getRegistry(JukeboxSong.class), "No registry present for JukeboxSong. This is a bug.");
+ @Deprecated(since = "1.21")
+ Registry<JukeboxSong> JUKEBOX_SONG = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(JukeboxSong.class), "No registry present for JukeboxSong. This is a bug."); // Paper
/**
* Villager profession.
*
@@ -294,8 +305,10 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
* Wolf variants.
*
* @see Wolf.Variant
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)} with {@link io.papermc.paper.registry.RegistryKey#WOLF_VARIANT}
*/
- Registry<Wolf.Variant> WOLF_VARIANT = Objects.requireNonNull(Bukkit.getRegistry(Wolf.Variant.class), "No registry present for Wolf Variant. This is a bug.");
+ @Deprecated(since = "1.20.6")
+ Registry<Wolf.Variant> WOLF_VARIANT = Objects.requireNonNull(io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(Wolf.Variant.class), "No registry present for Wolf$Variant. This is a bug."); // Paper
/**
* Map cursor types.
*
@@ -308,7 +321,7 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
*
* @see GameEvent
*/
- Registry<GameEvent> GAME_EVENT = Objects.requireNonNull(Bukkit.getRegistry(GameEvent.class), "No registry present for GameEvent. This is a bug.");
+ Registry<GameEvent> GAME_EVENT = io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(io.papermc.paper.registry.RegistryKey.GAME_EVENT); // Paper
/**
* Get the object by its key.
*
diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
index 076ed338c2f3230be30225a48e3c72dc894cf70a..fd3686688862fccc9989457cf3c1aaff777c66be 100644
--- a/src/main/java/org/bukkit/Server.java
+++ b/src/main/java/org/bukkit/Server.java
@@ -2056,8 +2056,11 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
* @param tClass of the registry to get
* @param <T> type of the registry
* @return the corresponding registry or null if not present
+ * @deprecated use {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)}
+ * with keys from {@link io.papermc.paper.registry.RegistryKey}
*/
@Nullable
+ @Deprecated(since = "1.20.6") // Paper
<T extends Keyed> Registry<T> getRegistry(@NotNull Class<T> tClass);
/**
diff --git a/src/test/java/io/papermc/paper/registry/TestRegistryAccess.java b/src/test/java/io/papermc/paper/registry/TestRegistryAccess.java
new file mode 100644
index 0000000000000000000000000000000000000000..f5ece852f97017f71bc129e194cb212979b2537b
--- /dev/null
+++ b/src/test/java/io/papermc/paper/registry/TestRegistryAccess.java
@@ -0,0 +1,20 @@
+package io.papermc.paper.registry;
+
+import org.bukkit.Keyed;
+import org.bukkit.Registry;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class TestRegistryAccess implements RegistryAccess {
+
+ @Override
+ @Deprecated(since = "1.20.6", forRemoval = true)
+ public @Nullable <T extends Keyed> Registry<T> getRegistry(final @NotNull Class<T> type) {
+ throw new UnsupportedOperationException("Not supported");
+ }
+
+ @Override
+ public @NotNull <T extends Keyed> Registry<T> getRegistry(final @NotNull RegistryKey<T> registryKey) {
+ throw new UnsupportedOperationException("Not supported");
+ }
+}
diff --git a/src/test/java/org/bukkit/support/TestServer.java b/src/test/java/org/bukkit/support/TestServer.java
index c79faf4197f9c0a7256cefe2b001182102d2b796..55f1bc7d01e5184172559c43b8327ac86d58041b 100644
--- a/src/test/java/org/bukkit/support/TestServer.java
+++ b/src/test/java/org/bukkit/support/TestServer.java
@@ -37,36 +37,11 @@ public final class TestServer {
when(instance.getBukkitVersion()).thenReturn("BukkitVersion_" + TestServer.class.getPackage().getImplementationVersion());
- Map<Class<? extends Keyed>, Registry<?>> registers = new HashMap<>();
- when(instance.getRegistry(any())).then(invocationOnMock -> registers.computeIfAbsent(invocationOnMock.getArgument(0), aClass -> new Registry<>() {
- private final Map<NamespacedKey, Keyed> cache = new HashMap<>();
-
- @Override
- public Keyed get(NamespacedKey key) {
- Class<? extends Keyed> theClass;
- // Some registries have extra Typed classes such as BlockType and ItemType.
- // To avoid class cast exceptions during init mock the Typed class.
- // To get the correct class, we just use the field type.
- try {
- theClass = (Class<? extends Keyed>) aClass.getField(key.getKey().toUpperCase(Locale.ROOT).replace('.', '_')).getType();
- } catch (ClassCastException | NoSuchFieldException e) {
- throw new RuntimeException(e);
- }
-
- return cache.computeIfAbsent(key, key2 -> mock(theClass, withSettings().stubOnly()));
- }
-
- @NotNull
- @Override
- public Stream<Keyed> stream() {
- throw new UnsupportedOperationException("Not supported");
- }
-
- @Override
- public Iterator<Keyed> iterator() {
- throw new UnsupportedOperationException("Not supported");
- }
- }));
+ // Paper start - RegistryAccess
+ when(instance.getRegistry(any())).then(invocationOnMock -> {
+ return io.papermc.paper.registry.RegistryAccess.registryAccess().getRegistry(((Class<Keyed>)invocationOnMock.getArgument(0)));
+ });
+ // Paper end - RegistryAccess
UnsafeValues unsafeValues = mock(withSettings().stubOnly());
when(instance.getUnsafe()).thenReturn(unsafeValues);
diff --git a/src/test/resources/META-INF/services/io.papermc.paper.registry.RegistryAccess b/src/test/resources/META-INF/services/io.papermc.paper.registry.RegistryAccess
new file mode 100644
index 0000000000000000000000000000000000000000..f0a5e6d6b99aeef349fe465080ef2ff7b58617a6
--- /dev/null
+++ b/src/test/resources/META-INF/services/io.papermc.paper.registry.RegistryAccess
@@ -0,0 +1 @@
+io.papermc.paper.registry.TestRegistryAccess
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