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-rw-r--r--patches/api/0485-Add-FeatureFlag-API.patch356
1 files changed, 356 insertions, 0 deletions
diff --git a/patches/api/0485-Add-FeatureFlag-API.patch b/patches/api/0485-Add-FeatureFlag-API.patch
new file mode 100644
index 0000000000..ae5e00b283
--- /dev/null
+++ b/patches/api/0485-Add-FeatureFlag-API.patch
@@ -0,0 +1,356 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <[email protected]>
+Date: Thu, 9 Mar 2023 11:24:43 -0800
+Subject: [PATCH] Add FeatureFlag API
+
+
+diff --git a/src/main/java/io/papermc/paper/world/flag/FeatureDependant.java b/src/main/java/io/papermc/paper/world/flag/FeatureDependant.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..f5633319c64bf19cf07e2b9a1cac2dd1d11ab70b
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/world/flag/FeatureDependant.java
+@@ -0,0 +1,28 @@
++package io.papermc.paper.world.flag;
++
++import java.util.Set;
++import org.bukkit.FeatureFlag;
++import org.jetbrains.annotations.ApiStatus;
++import org.jetbrains.annotations.Unmodifiable;
++import org.jspecify.annotations.NullMarked;
++
++/**
++ * Implemented by types in built-in registries that are controlled by {@link FeatureFlag FeatureFlags}.
++ * Types in data-driven registries that are controlled by feature flags just will not exist in that registry.
++ * @apiNote When a type that currently implements this interface transitions to being data-drive, this
++ * interface will be removed from that type in the following major version.
++ */
++@NullMarked
++public interface FeatureDependant {
++
++ /**
++ * Gets the set of required feature flags for this
++ * to be enabled.
++ *
++ * @return the immutable set of feature flags
++ */
++ default @Unmodifiable Set<FeatureFlag> requiredFeatures() {
++ return FeatureFlagProvider.provider().requiredFeatures(this);
++ }
++}
+diff --git a/src/main/java/io/papermc/paper/world/flag/FeatureFlagProvider.java b/src/main/java/io/papermc/paper/world/flag/FeatureFlagProvider.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..388e70628f88d8ee0749a43f82b228453e25d5d0
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/world/flag/FeatureFlagProvider.java
+@@ -0,0 +1,21 @@
++package io.papermc.paper.world.flag;
++
++import java.util.Optional;
++import java.util.ServiceLoader;
++import java.util.Set;
++import org.bukkit.FeatureFlag;
++import org.jetbrains.annotations.ApiStatus;
++import org.jspecify.annotations.NullMarked;
++
++@NullMarked
++interface FeatureFlagProvider {
++
++ Optional<FeatureFlagProvider> PROVIDER = ServiceLoader.load(FeatureFlagProvider.class).findFirst();
++
++ static FeatureFlagProvider provider() {
++ return PROVIDER.orElseThrow();
++ }
++
++ Set<FeatureFlag> requiredFeatures(FeatureDependant dependant);
++}
+diff --git a/src/main/java/io/papermc/paper/world/flag/FeatureFlagSetHolder.java b/src/main/java/io/papermc/paper/world/flag/FeatureFlagSetHolder.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..0955699df65ccbb8711cfa48f0b34d5a8805f1af
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/world/flag/FeatureFlagSetHolder.java
+@@ -0,0 +1,32 @@
++package io.papermc.paper.world.flag;
++
++import java.util.Set;
++import org.bukkit.FeatureFlag;
++import org.jetbrains.annotations.ApiStatus;
++import org.jetbrains.annotations.Unmodifiable;
++import org.jspecify.annotations.NullMarked;
++
++/**
++ * Implemented by types that hold {@link FeatureFlag FeatureFlags} like
++ * {@link org.bukkit.generator.WorldInfo} and {@link org.bukkit.RegionAccessor}.
++ */
++@NullMarked
++public interface FeatureFlagSetHolder {
++
++ /**
++ * Checks if this is enabled based on the loaded feature flags.
++ *
++ * @return true if enabled
++ */
++ default boolean isEnabled(final FeatureDependant featureDependant) {
++ return this.getFeatureFlags().containsAll(featureDependant.requiredFeatures());
++ }
++
++ /**
++ * Get all {@link FeatureFlag FeatureFlags} enabled in this world.
++ *
++ * @return all enabled {@link FeatureFlag FeatureFlags}
++ */
++ @Unmodifiable Set<FeatureFlag> getFeatureFlags();
++}
+diff --git a/src/main/java/org/bukkit/FeatureFlag.java b/src/main/java/org/bukkit/FeatureFlag.java
+index 026b1832bcd163ab89668c991bf002e608e36aef..b5e87480b6a1d064547e4e608f3d402825931a00 100644
+--- a/src/main/java/org/bukkit/FeatureFlag.java
++++ b/src/main/java/org/bukkit/FeatureFlag.java
+@@ -1,37 +1,56 @@
+ package org.bukkit;
+
++// Paper start - overhaul FeatureFlag API
++import com.google.common.base.Preconditions;
++import java.util.List;
++import net.kyori.adventure.key.Key;
++import net.kyori.adventure.util.Index;
++import org.intellij.lang.annotations.Subst;
++// Paper end - overhaul FeatureFlag API
+ import org.jetbrains.annotations.ApiStatus;
+
+ /**
+- * This represents a Feature Flag for a World.
+- * <br>
+- * Flags which are unavailable in the current version will be null and/or
+- * removed.
++ * This represents a Feature Flag for a {@link io.papermc.paper.world.flag.FeatureFlagSetHolder}.
+ */
+ public interface FeatureFlag extends Keyed {
+
+- public static final FeatureFlag VANILLA = Bukkit.getUnsafe().getFeatureFlag(NamespacedKey.minecraft("vanilla"));
++ // Paper start - overhaul FeatureFlag API
++ /**
++ * The {@code vanilla} feature flag.
++ */
++ FeatureFlag VANILLA = create("vanilla");
+
++ /**
++ * The {@code bundle} feature flag.
++ */
+ @ApiStatus.Experimental // Paper - add missing annotation
+- public static final FeatureFlag BUNDLE = Bukkit.getUnsafe().getFeatureFlag(NamespacedKey.minecraft("bundle"));
++ FeatureFlag BUNDLE = create("bundle");
+
+ /**
+- * <strong>AVAILABLE BETWEEN VERSIONS:</strong> 1.19 - 1.19.4
+- *
+- * @deprecated not available since 1.20
++ * The {@code trade_rebalance} feature flag.
+ */
+- @Deprecated
+- public static final FeatureFlag UPDATE_1_20 = Bukkit.getUnsafe().getFeatureFlag(NamespacedKey.minecraft("update_1_20"));
+-
+ @ApiStatus.Experimental // Paper - add missing annotation
+- public static final FeatureFlag TRADE_REBALANCE = Bukkit.getUnsafe().getFeatureFlag(NamespacedKey.minecraft("trade_rebalance"));
++ FeatureFlag TRADE_REBALANCE = create("trade_rebalance");
++
++ @Deprecated(since = "1.20")
++ FeatureFlag UPDATE_1_20 = deprecated("update_1_20");
++
++ @Deprecated(since = "1.21")
++ FeatureFlag UPDATE_121 = deprecated("update_1_21");
+
+ /**
+- * <strong>AVAILABLE BETWEEN VERSIONS:</strong> 1.20.5 - 1.20.6
+- *
+- * @deprecated not available since 1.21
++ * An index of all feature flags.
+ */
+- @Deprecated
+- public static final FeatureFlag UPDATE_121 = Bukkit.getUnsafe().getFeatureFlag(NamespacedKey.minecraft("update_1_21"));
++ Index<Key, FeatureFlag> ALL_FLAGS = Index.create(FeatureFlag::key, List.copyOf(FeatureFlagImpl.ALL_FLAGS));
++
++ private static FeatureFlag create(@Subst("vanilla") final String name) {
++ final FeatureFlag flag = new FeatureFlagImpl(NamespacedKey.minecraft(name));
++ Preconditions.checkState(FeatureFlagImpl.ALL_FLAGS.add(flag), "Tried to add duplicate feature flag: " + name);
++ return flag;
++ }
++
++ private static FeatureFlag deprecated(@Subst("vanilla") final String name) {
++ return new FeatureFlagImpl.Deprecated(NamespacedKey.minecraft(name));
++ }
++ // Paper end - overhaul FeatureFlag API
+ }
+diff --git a/src/main/java/org/bukkit/FeatureFlagImpl.java b/src/main/java/org/bukkit/FeatureFlagImpl.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..5a43f65f633dc9a1a0ba7dba0c15488375427444
+--- /dev/null
++++ b/src/main/java/org/bukkit/FeatureFlagImpl.java
+@@ -0,0 +1,27 @@
++package org.bukkit;
++
++import java.util.HashSet;
++import java.util.Set;
++import org.jetbrains.annotations.ApiStatus;
++import org.jspecify.annotations.NullMarked;
++
++@NullMarked
++record FeatureFlagImpl(NamespacedKey key) implements FeatureFlag {
++
++ static final Set<FeatureFlag> ALL_FLAGS = new HashSet<>();
++
++ @Override
++ public NamespacedKey getKey() {
++ return this.key;
++ }
++
++ @ApiStatus.Internal
++ record Deprecated(NamespacedKey key) implements FeatureFlag {
++
++ @Override
++ public NamespacedKey getKey() {
++ return this.key;
++ }
++ }
++}
+diff --git a/src/main/java/org/bukkit/RegionAccessor.java b/src/main/java/org/bukkit/RegionAccessor.java
+index eb33e8e671972aa308ad75a7ce9aa9ac526f470f..05ecf3cb38ff42c8b52405d900197e6bf47dd1e6 100644
+--- a/src/main/java/org/bukkit/RegionAccessor.java
++++ b/src/main/java/org/bukkit/RegionAccessor.java
+@@ -18,7 +18,7 @@ import org.jetbrains.annotations.Nullable;
+ * A RegionAccessor gives access to getting, modifying and spawning {@link Biome}, {@link BlockState} and {@link Entity},
+ * as well as generating some basic structures.
+ */
+-public interface RegionAccessor extends Keyed { // Paper
++public interface RegionAccessor extends Keyed, io.papermc.paper.world.flag.FeatureFlagSetHolder { // Paper - feature flag API
+
+ /**
+ * Gets the {@link Biome} at the given {@link Location}.
+diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
+index 330e3013eda204aa9b33d5e1c3104e0b595abdbc..c80e0ef587a001ee6de3f5c182cc9696d58bafeb 100644
+--- a/src/main/java/org/bukkit/UnsafeValues.java
++++ b/src/main/java/org/bukkit/UnsafeValues.java
+@@ -114,8 +114,7 @@ public interface UnsafeValues {
+
+ String getTranslationKey(Attribute attribute);
+
+- @Nullable
+- FeatureFlag getFeatureFlag(@NotNull NamespacedKey key);
++ // Paper - replace with better system
+
+ /**
+ * Do not use, method will get removed, and the plugin won't run
+diff --git a/src/main/java/org/bukkit/block/BlockType.java b/src/main/java/org/bukkit/block/BlockType.java
+index a58ef2238208fbb55341f4532eaa288577ed8c0e..fb2b373c1822e7248a30e610d11e2c2bd438c19a 100644
+--- a/src/main/java/org/bukkit/block/BlockType.java
++++ b/src/main/java/org/bukkit/block/BlockType.java
+@@ -125,7 +125,7 @@ import org.jetbrains.annotations.Nullable;
+ * changes may occur. Do not use this API in plugins.
+ */
+ @ApiStatus.Internal
+-public interface BlockType extends Keyed, Translatable, net.kyori.adventure.translation.Translatable { // Paper - add translatable
++public interface BlockType extends Keyed, Translatable, net.kyori.adventure.translation.Translatable, io.papermc.paper.world.flag.FeatureDependant { // Paper - add translatable & feature flag API
+
+ /**
+ * Typed represents a subtype of {@link BlockType}s that have a known block
+@@ -3490,7 +3490,9 @@ public interface BlockType extends Keyed, Translatable, net.kyori.adventure.tran
+ *
+ * @param world the world to check
+ * @return true if this BlockType can be used in this World.
++ * @deprecated Use {@link io.papermc.paper.world.flag.FeatureFlagSetHolder#isEnabled(io.papermc.paper.world.flag.FeatureDependant)}
+ */
++ @Deprecated(forRemoval = true, since = "1.21.1") // Paper
+ boolean isEnabledByFeature(@NotNull World world);
+
+ /**
+diff --git a/src/main/java/org/bukkit/entity/EntityType.java b/src/main/java/org/bukkit/entity/EntityType.java
+index ba605ad75d4ed920c0dc4527529998041a58676b..a78e1c431a6ea46ba7c44880e25a871f473bef41 100644
+--- a/src/main/java/org/bukkit/entity/EntityType.java
++++ b/src/main/java/org/bukkit/entity/EntityType.java
+@@ -23,7 +23,7 @@ import org.jetbrains.annotations.Contract;
+ import org.jetbrains.annotations.NotNull;
+ import org.jetbrains.annotations.Nullable;
+
+-public enum EntityType implements Keyed, Translatable, net.kyori.adventure.translation.Translatable { // Paper - translatable
++public enum EntityType implements Keyed, Translatable, net.kyori.adventure.translation.Translatable, io.papermc.paper.world.flag.FeatureDependant { // Paper - translatable
+
+ // These strings MUST match the strings in nms.EntityTypes and are case sensitive.
+ /**
+diff --git a/src/main/java/org/bukkit/generator/WorldInfo.java b/src/main/java/org/bukkit/generator/WorldInfo.java
+index 5067f1371433cccd3287af7f03e152f2c3c1ece3..e0cb282541548ac3bd24cce86b3413f5748ea8bc 100644
+--- a/src/main/java/org/bukkit/generator/WorldInfo.java
++++ b/src/main/java/org/bukkit/generator/WorldInfo.java
+@@ -7,7 +7,7 @@ import org.jetbrains.annotations.NotNull;
+ /**
+ * Holds various information of a World
+ */
+-public interface WorldInfo {
++public interface WorldInfo extends io.papermc.paper.world.flag.FeatureFlagSetHolder { // Paper - feature flag API
+
+ /**
+ * Gets the unique name of this world
+diff --git a/src/main/java/org/bukkit/inventory/ItemType.java b/src/main/java/org/bukkit/inventory/ItemType.java
+index 15d68c4997f739c39675ef8ffa5ab7967dac59f2..f96ced6ae8a969319728efb4fc4fe545923e32be 100644
+--- a/src/main/java/org/bukkit/inventory/ItemType.java
++++ b/src/main/java/org/bukkit/inventory/ItemType.java
+@@ -47,7 +47,7 @@ import org.jetbrains.annotations.Nullable;
+ * changes may occur. Do not use this API in plugins.
+ */
+ @ApiStatus.Experimental // Paper - already required for registry builders
+-public interface ItemType extends Keyed, Translatable, net.kyori.adventure.translation.Translatable { // Paper - add Translatable
++public interface ItemType extends Keyed, Translatable, net.kyori.adventure.translation.Translatable, io.papermc.paper.world.flag.FeatureDependant { // Paper - add Translatable & feature flag API
+
+ /**
+ * Typed represents a subtype of {@link ItemType}s that have a known item meta type
+@@ -2300,7 +2300,9 @@ public interface ItemType extends Keyed, Translatable, net.kyori.adventure.trans
+ *
+ * @param world the world to check
+ * @return true if this ItemType can be used in this World.
++ * @deprecated use {@link io.papermc.paper.world.flag.FeatureFlagSetHolder#isEnabled(io.papermc.paper.world.flag.FeatureDependant)}
+ */
++ @Deprecated(forRemoval = true, since = "1.21.1") // Paper
+ boolean isEnabledByFeature(@NotNull World world);
+
+ /**
+diff --git a/src/main/java/org/bukkit/inventory/MenuType.java b/src/main/java/org/bukkit/inventory/MenuType.java
+index 34d45a105da72481a7c4f2e3831f5d2a676c91c6..529143c9007d6da4f671576f9934933f2e5d6f23 100644
+--- a/src/main/java/org/bukkit/inventory/MenuType.java
++++ b/src/main/java/org/bukkit/inventory/MenuType.java
+@@ -22,7 +22,7 @@ import org.jetbrains.annotations.NotNull;
+ * created and viewed by the player.
+ */
+ @ApiStatus.Experimental
+-public interface MenuType extends Keyed {
++public interface MenuType extends Keyed, io.papermc.paper.world.flag.FeatureDependant { // Paper - make FeatureDependant
+
+ /**
+ * A MenuType which represents a chest with 1 row.
+diff --git a/src/main/java/org/bukkit/potion/PotionEffectType.java b/src/main/java/org/bukkit/potion/PotionEffectType.java
+index d02bb37768404422969d8b93e009960d0a693a93..294ba70f1e446ec8d502e5c14f82ae52547aeb21 100644
+--- a/src/main/java/org/bukkit/potion/PotionEffectType.java
++++ b/src/main/java/org/bukkit/potion/PotionEffectType.java
+@@ -17,7 +17,7 @@ import org.jetbrains.annotations.Nullable;
+ /**
+ * Represents a type of potion and its effect on an entity.
+ */
+-public abstract class PotionEffectType implements Keyed, Translatable, net.kyori.adventure.translation.Translatable { // Paper - implement Translatable
++public abstract class PotionEffectType implements Keyed, Translatable, net.kyori.adventure.translation.Translatable, io.papermc.paper.world.flag.FeatureDependant { // Paper - implement Translatable & feature flag API
+ private static final BiMap<Integer, PotionEffectType> ID_MAP = HashBiMap.create();
+
+ /**
+diff --git a/src/main/java/org/bukkit/potion/PotionType.java b/src/main/java/org/bukkit/potion/PotionType.java
+index 453c626092caa734a0af5800699f299fc6fd0e43..c82cc9d9db5cb0e0e3c02f6a9564fc935ee594aa 100644
+--- a/src/main/java/org/bukkit/potion/PotionType.java
++++ b/src/main/java/org/bukkit/potion/PotionType.java
+@@ -14,7 +14,7 @@ import org.jetbrains.annotations.Nullable;
+ * This enum reflects and matches each potion state that can be obtained from
+ * the Creative mode inventory
+ */
+-public enum PotionType implements Keyed {
++public enum PotionType implements Keyed, io.papermc.paper.world.flag.FeatureDependant { // Paper - feature flag API
+ WATER("water"),
+ MUNDANE("mundane"),
+ THICK("thick"),