mirror of
https://github.com/PaperMC/Paper.git
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93 lines
2.9 KiB
Diff
93 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jake Potrebic <jake.m.potrebic@gmail.com>
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Date: Wed, 2 Mar 2022 13:36:21 -0800
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Subject: [PATCH] Add PaperRegistry
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diff --git a/src/main/java/io/papermc/paper/registry/Reference.java b/src/main/java/io/papermc/paper/registry/Reference.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..d880810cbf05bc45051fe29515054211572e33b4
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/registry/Reference.java
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@@ -0,0 +1,43 @@
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+package io.papermc.paper.registry;
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+
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+import org.bukkit.Keyed;
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+import org.bukkit.NamespacedKey;
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+import org.bukkit.Registry;
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+import org.jetbrains.annotations.NotNull;
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+import org.jetbrains.annotations.Nullable;
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+
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+/**
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+ * Represents a reference to a server-backed registry value that may
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+ * change.
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+ *
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+ * @param <T> type of the value
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+ */
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+public interface Reference<T extends Keyed> extends Keyed {
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+
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+ /**
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+ * Gets the value from the registry with the key.
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+ *
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+ * @return the value
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+ * @throws java.util.NoSuchElementException if there is no value with this key
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+ */
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+ @NotNull T value();
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+
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+ /**
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+ * Gets the value from the registry with the key.
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+ *
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+ * @return the value or null if it doesn't exist
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+ */
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+ @Nullable T valueOrNull();
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+
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+ /**
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+ * Creates a reference to a registered value.
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+ *
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+ * @param registry the registry the value is located in
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+ * @param key the key to the value
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+ * @param <T> the type of the value
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+ * @return a reference
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+ */
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+ static <T extends Keyed> @NotNull Reference<T> create(@NotNull Registry<T> registry, @NotNull NamespacedKey key) {
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+ return new ReferenceImpl<>(registry, key);
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+ }
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+}
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diff --git a/src/main/java/io/papermc/paper/registry/ReferenceImpl.java b/src/main/java/io/papermc/paper/registry/ReferenceImpl.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..f29e76a6b66ddfec12ddf8db6dcb2df6083b5982
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/registry/ReferenceImpl.java
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@@ -0,0 +1,31 @@
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+package io.papermc.paper.registry;
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+
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+import org.bukkit.Keyed;
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+import org.bukkit.NamespacedKey;
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+import org.bukkit.Registry;
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+import org.jetbrains.annotations.NotNull;
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+import org.jetbrains.annotations.Nullable;
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+
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+import java.util.NoSuchElementException;
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+
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+record ReferenceImpl<T extends Keyed>(@NotNull Registry<T> registry, @NotNull NamespacedKey key) implements Reference<T> {
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+
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+ @Override
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+ public @NotNull T value() {
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+ final T value = this.registry.get(this.key);
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+ if (value == null) {
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+ throw new NoSuchElementException("No such value with key " + this.key);
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+ }
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+ return value;
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+ }
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+
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+ @Override
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+ public @Nullable T valueOrNull() {
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+ return this.registry.get(this.key);
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+ }
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+
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+ @Override
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+ public @NotNull NamespacedKey getKey() {
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+ return this.key;
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+ }
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+}
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