From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Jake Potrebic Date: Wed, 2 Mar 2022 13:36:21 -0800 Subject: [PATCH] Add PaperRegistry 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..d880810cbf05bc45051fe29515054211572e33b4 --- /dev/null +++ b/src/main/java/io/papermc/paper/registry/Reference.java @@ -0,0 +1,43 @@ +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 type of the value + */ +public interface Reference 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 + */ + @NotNull T value(); + + /** + * Gets the value from the registry with the key. + * + * @return the value or null if it doesn't exist + */ + @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 the type of the value + * @return a reference + */ + static @NotNull Reference create(@NotNull Registry 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(@NotNull Registry registry, @NotNull NamespacedKey key) implements Reference { + + @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/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java index b24439b379be1a90dde4e6f4dbe5ca3fdd8face4..0697214210a6e87f690b9454d9651d06ca57a524 100644 --- a/src/main/java/org/bukkit/UnsafeValues.java +++ b/src/main/java/org/bukkit/UnsafeValues.java @@ -147,5 +147,15 @@ public interface UnsafeValues { * Use this when sending custom packets, so that there are no collisions on the client or server. */ public int nextEntityId(); + + /** + * Gets the server-backed registry for a type. + * + * @param classOfT type + * @param type + * @return the server-backed registry + * @throws IllegalArgumentException if there isn't a registry for that type + */ + @org.jetbrains.annotations.NotNull Registry registryFor(Class classOfT); // Paper end }