Paper/patches/api/0430-Improve-Registry.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 20 Dec 2023 02:03:10 -0800
Subject: [PATCH] Improve Registry

Adds Registry#getKey(Object) which should be the
primary way people get the key for an object. Registry
items need to exist without having a key and so
getKey() methods on Keyed objects that have a registry
are marked as Deprecated or Obsolete.

diff --git a/src/main/java/org/bukkit/Art.java b/src/main/java/org/bukkit/Art.java
index 042d1d932a33022e4fc873652f70dc6ed342d46a..e57e34064262b90221b0621f1d13e9705e68421a 100644
--- a/src/main/java/org/bukkit/Art.java
+++ b/src/main/java/org/bukkit/Art.java
@@ -103,6 +103,13 @@ public enum Art implements Keyed {
         return id;
     }
 
+    // Paper start - deprecate getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)}, {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)},
+     * and {@link io.papermc.paper.registry.RegistryKey#PAINTING_VARIANT}. Painting variants can exist without a key.
+     */
+    @Deprecated(since = "1.21")
+    // Paper end - deprecate getKey
     @NotNull
     @Override
     public NamespacedKey getKey() {
diff --git a/src/main/java/org/bukkit/MusicInstrument.java b/src/main/java/org/bukkit/MusicInstrument.java
index c9f02466a04d20579fe2258bb02acf98e163ca81..bffd4ab2d08e5c3f83a49a31e1e55cc1eab7b319 100644
--- a/src/main/java/org/bukkit/MusicInstrument.java
+++ b/src/main/java/org/bukkit/MusicInstrument.java
@@ -47,6 +47,16 @@ public abstract class MusicInstrument implements Keyed, net.kyori.adventure.tran
         return Registry.INSTRUMENT.getOrThrow(NamespacedKey.minecraft(key));
     }
 
+    // Paper start - deprecate getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)} and {@link Registry#INSTRUMENT}. MusicInstruments
+     * can exist without a key.
+     */
+    @Deprecated(forRemoval = true, since = "1.20.5")
+    @Override
+    public abstract @NotNull NamespacedKey getKey();
+    // Paper end - deprecate getKey
+
     // Paper start - translation key
     @Override
     public @NotNull String translationKey() {
diff --git a/src/main/java/org/bukkit/Registry.java b/src/main/java/org/bukkit/Registry.java
index 6112db5d1153d045f2271038bada6b46d1a6a051..67cf3fcad21a8977d6fad172cc776b628ab68f25 100644
--- a/src/main/java/org/bukkit/Registry.java
+++ b/src/main/java/org/bukkit/Registry.java
@@ -379,6 +379,79 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
     @Nullable
     T get(@NotNull NamespacedKey key);
 
+    // Paper start - improve Registry
+    /**
+     * Gets the object by its key or throws if it doesn't exist.
+     *
+     * @param key the key to get the object of in this registry
+     * @return the object for the key
+     * @throws java.util.NoSuchElementException if the key doesn't point to an object in the registry
+     */
+    default @NotNull T getOrThrow(final net.kyori.adventure.key.@NotNull Key key) {
+        final T value = this.get(key);
+        if (value == null) {
+            throw new java.util.NoSuchElementException("No value for " + key + " in " + this);
+        }
+        return value;
+    }
+
+    /**
+     * Gets the object by its key or throws if it doesn't exist.
+     *
+     * @param key the key to get the object of in this registry
+     * @return the object for the key
+     * @throws java.util.NoSuchElementException if the key doesn't point to an object in the registry
+     */
+    default @NotNull T getOrThrow(final io.papermc.paper.registry.@NotNull TypedKey<T> key) {
+        final T value = this.get(key);
+        if (value == null) {
+            throw new java.util.NoSuchElementException("No value for " + key + " in " + this);
+        }
+        return value;
+    }
+
+    /**
+     * Gets the key for this object or throws if it doesn't exist.
+     * <p>
+     * Some types can exist without being in a registry
+     * and such will have no key associated with them. This
+     * method throw an exception if it isn't in this registry.
+     *
+     * @param value the value to get the key of in this registry
+     * @return the key for the value
+     * @throws java.util.NoSuchElementException if the value doesn't exist in this registry
+     * @see #getKey(Keyed)
+     */
+    default @NotNull NamespacedKey getKeyOrThrow(final @NotNull T value) {
+        Preconditions.checkArgument(value != null, "value cannot be null");
+        final NamespacedKey key = this.getKey(value);
+        if (key == null) {
+            throw new java.util.NoSuchElementException(value + " has no key in " + this);
+        }
+        return key;
+    }
+
+    /**
+     * Get the key for this object.
+     * <p>
+     * Some types can exist without being in a registry
+     * and such will have no key associated with them. This
+     * method will return null.
+     *
+     * @param value the value to get the key of in this registry
+     * @return the key for the value or null if not in the registry
+     * @see #getKeyOrThrow(Keyed)
+     */
+    default @Nullable NamespacedKey getKey(final @NotNull T value) {
+        Preconditions.checkArgument(value != null, "value cannot be null");
+        //noinspection ConstantValue (it might not be in the future...)
+        if (value instanceof Keyed) {
+            return value.getKey();
+        }
+        return null;
+    }
+    // Paper end - improve Registry
+
     /**
      * Get the object by its key.
      *
@@ -475,5 +548,12 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
         public Class<T> getType() {
             return this.type;
         }
+
+        // Paper start - improve Registry
+        @Override
+        public @NotNull NamespacedKey getKey(final @NotNull T value) {
+            return value.getKey();
+        }
+        // Paper end - improve Registry
     }
 }
diff --git a/src/main/java/org/bukkit/Sound.java b/src/main/java/org/bukkit/Sound.java
index cf17af024b1953b6f21f18885411ea6a0baa1d4c..f32a035317f3f8e200bb8076e6a326cb1e87cfe1 100644
--- a/src/main/java/org/bukkit/Sound.java
+++ b/src/main/java/org/bukkit/Sound.java
@@ -1655,6 +1655,13 @@ public enum Sound implements Keyed, net.kyori.adventure.sound.Sound.Type { // Pa
         this.key = NamespacedKey.minecraft(key);
     }
 
+    // Paper start - deprecate getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)} and {@link Registry#SOUNDS}. Sounds
+     * can exist without a key.
+     */
+    @Deprecated(since = "1.20.5")
+    // Paper end - deprecate getKey
     @NotNull
     @Override
     public NamespacedKey getKey() {
diff --git a/src/main/java/org/bukkit/block/banner/PatternType.java b/src/main/java/org/bukkit/block/banner/PatternType.java
index eaf6cd758344eeba29f00f822a50c93704af8bda..eb192030832e1741850871bec9bf999f014b6fc1 100644
--- a/src/main/java/org/bukkit/block/banner/PatternType.java
+++ b/src/main/java/org/bukkit/block/banner/PatternType.java
@@ -56,6 +56,13 @@ public interface PatternType extends OldEnum<PatternType>, Keyed {
     PatternType FLOW = getType("flow");
     PatternType GUSTER = getType("guster");
 
+    // Paper start - deprecate getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)}, {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)},
+     * and {@link io.papermc.paper.registry.RegistryKey#BANNER_PATTERN}. PatternTypes can exist without a key.
+     */
+    @Deprecated(since = "1.20.5")
+    // Paper end - deprecate getKey
     @Override
     @NotNull
     public NamespacedKey getKey();
diff --git a/src/main/java/org/bukkit/generator/structure/Structure.java b/src/main/java/org/bukkit/generator/structure/Structure.java
index 20a7fd27ba3a029d58dd18ad9b470ffaed8c9578..a773550549b4093a5fb4ef47284c438dcddd99ab 100644
--- a/src/main/java/org/bukkit/generator/structure/Structure.java
+++ b/src/main/java/org/bukkit/generator/structure/Structure.java
@@ -61,4 +61,13 @@ public abstract class Structure implements Keyed {
      */
     @NotNull
     public abstract StructureType getStructureType();
+    // Paper start - deprecate getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)} and {@link Registry#STRUCTURE}. Structures
+     * can exist without a key.
+     */
+    @Override
+    @Deprecated(since = "1.20.4")
+    public abstract @NotNull NamespacedKey getKey();
+    // Paper end - deprecate getKey
 }
diff --git a/src/main/java/org/bukkit/inventory/meta/trim/TrimMaterial.java b/src/main/java/org/bukkit/inventory/meta/trim/TrimMaterial.java
index 804cb7162b34225d5dd84aada283de568d7d6592..2a7bedf850896e358213c2a201ca3d611cb9ea67 100644
--- a/src/main/java/org/bukkit/inventory/meta/trim/TrimMaterial.java
+++ b/src/main/java/org/bukkit/inventory/meta/trim/TrimMaterial.java
@@ -74,4 +74,14 @@ public interface TrimMaterial extends Keyed, Translatable {
     @Deprecated(forRemoval = true)
     @org.jetbrains.annotations.NotNull String getTranslationKey();
     // Paper end - adventure
+
+    // Paper start - Registry#getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)}, {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)},
+     * and {@link io.papermc.paper.registry.RegistryKey#TRIM_MATERIAL}. TrimMaterials can exist without a key.
+     */
+    @Deprecated(forRemoval = true, since = "1.20.4")
+    @Override
+    org.bukkit.@org.jetbrains.annotations.NotNull NamespacedKey getKey();
+    // Paper end - Registry#getKey
 }
diff --git a/src/main/java/org/bukkit/inventory/meta/trim/TrimPattern.java b/src/main/java/org/bukkit/inventory/meta/trim/TrimPattern.java
index 56cfe665daba1754e41f633d7c18172bebf87028..db657206c158e755227e8ef8e102a2ee2cc3bf0a 100644
--- a/src/main/java/org/bukkit/inventory/meta/trim/TrimPattern.java
+++ b/src/main/java/org/bukkit/inventory/meta/trim/TrimPattern.java
@@ -106,4 +106,14 @@ public interface TrimPattern extends Keyed, Translatable {
     @Deprecated(forRemoval = true)
     @org.jetbrains.annotations.NotNull String getTranslationKey();
     // Paper end - adventure
+
+    // Paper start - Registry#getKey
+    /**
+     * @deprecated use {@link Registry#getKey(Keyed)}, {@link io.papermc.paper.registry.RegistryAccess#getRegistry(io.papermc.paper.registry.RegistryKey)},
+     * and {@link io.papermc.paper.registry.RegistryKey#TRIM_PATTERN}. TrimPatterns can exist without a key.
+     */
+    @Deprecated(forRemoval = true, since = "1.20.4")
+    @Override
+    org.bukkit.@org.jetbrains.annotations.NotNull NamespacedKey getKey();
+    // Paper end - Registry#getKey
 }