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PaperMC/patches/server/1053-Add-FeatureFlag-API.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412) 
Spigot still maintains some partial implementation of "tick skipping", a
practice in which the MinecraftServer.currentTick field is updated not
by an increment of one per actual tick, but instead set to
System.currentTimeMillis() / 50. This behaviour means that the tracked
tick may "skip" a tick value in case a previous tick took more than the
expected 50ms.

To compensate for this in important paths, spigot/craftbukkit
implements "wall-time". Instead of incrementing/decrementing ticks on
block entities/entities by one for each call to their tick() method,
they instead increment/decrement important values, like
an ItemEntity's age or pickupDelay, by the difference of
`currentTick - lastTick`, where `lastTick` is the value of
`currentTick` during the last tick() call.

These "fixes" however do not play nicely with minecraft's simulation
distance as entities/block entities implementing the above behaviour
would "catch up" their values when moving from a non-ticking chunk to a
ticking one as their `lastTick` value remains stuck on the last tick in
a ticking chunk and hence lead to a large "catch up" once ticked again.

Paper completely removes the "tick skipping" behaviour (See patch
"Further-improve-server-tick-loop"), making the above precautions
completely unnecessary, which also rids paper of the previous described
incompatibility with non-ticking chunks.
2024-09-19 16:36:07 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 29 May 2024 19:50:21 -0700
Subject: [PATCH] Add FeatureFlag API
diff --git a/src/main/java/io/papermc/paper/world/flag/PaperFeatureDependent.java b/src/main/java/io/papermc/paper/world/flag/PaperFeatureDependent.java
new file mode 100644
index 0000000000000000000000000000000000000000..c6fd2e8a570ac474dd1751929137280c52d79e78
--- /dev/null
+++ b/src/main/java/io/papermc/paper/world/flag/PaperFeatureDependent.java
@@ -0,0 +1,17 @@
+package io.papermc.paper.world.flag;
+
+import java.util.Set;
+import net.minecraft.world.flag.FeatureElement;
+import org.bukkit.FeatureFlag;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.Unmodifiable;
+
+public interface PaperFeatureDependent extends FeatureDependant {
+
+ <M extends FeatureElement> M getHandle();
+
+ @Override
+ default @Unmodifiable @NonNull Set<FeatureFlag> requiredFeatures() {
+ return PaperFeatureFlagProviderImpl.fromNms(this.getHandle().requiredFeatures());
+ }
+}
diff --git a/src/main/java/io/papermc/paper/world/flag/PaperFeatureFlagProviderImpl.java b/src/main/java/io/papermc/paper/world/flag/PaperFeatureFlagProviderImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..d58b650fcafd04d00a92005ca8576d314535ce32
--- /dev/null
+++ b/src/main/java/io/papermc/paper/world/flag/PaperFeatureFlagProviderImpl.java
@@ -0,0 +1,53 @@
+package io.papermc.paper.world.flag;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.ImmutableBiMap;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import net.minecraft.world.flag.FeatureElement;
+import net.minecraft.world.flag.FeatureFlagSet;
+import net.minecraft.world.flag.FeatureFlags;
+import org.bukkit.FeatureFlag;
+import org.bukkit.craftbukkit.entity.CraftEntityType;
+import org.bukkit.craftbukkit.entity.CraftEntityTypes;
+import org.bukkit.craftbukkit.potion.CraftPotionType;
+import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+import org.bukkit.entity.EntityType;
+import org.bukkit.potion.PotionType;
+
+public class PaperFeatureFlagProviderImpl implements FeatureFlagProvider {
+
+ public static final BiMap<FeatureFlag, net.minecraft.world.flag.FeatureFlag> FLAGS = ImmutableBiMap.of(
+ FeatureFlag.VANILLA, FeatureFlags.VANILLA,
+ FeatureFlag.BUNDLE, FeatureFlags.BUNDLE,
+ FeatureFlag.TRADE_REBALANCE, FeatureFlags.TRADE_REBALANCE
+ );
+
+ @Override
+ public Set<FeatureFlag> requiredFeatures(final FeatureDependant dependant) {
+ final FeatureFlagSet requiredFeatures = getFeatureElement(dependant).requiredFeatures();
+ return fromNms(requiredFeatures);
+ }
+
+ public static Set<FeatureFlag> fromNms(final FeatureFlagSet flagSet) {
+ final Set<FeatureFlag> flags = new HashSet<>();
+ for (final net.minecraft.world.flag.FeatureFlag nmsFlag : FeatureFlags.REGISTRY.names.values()) {
+ if (flagSet.contains(nmsFlag)) {
+ flags.add(FLAGS.inverse().get(nmsFlag));
+ }
+ }
+ return Collections.unmodifiableSet(flags);
+ }
+
+ static FeatureElement getFeatureElement(final FeatureDependant dependant) {
+ if (dependant instanceof final EntityType entityType) {
+ // TODO remove when EntityType is server-backed
+ return CraftEntityType.bukkitToMinecraft(entityType);
+ } else if (dependant instanceof final PotionType potionType) {
+ return CraftPotionType.bukkitToMinecraft(potionType);
+ } else {
+ throw new IllegalArgumentException(dependant + " is not a valid feature dependant");
+ }
+ }
+}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftFeatureFlag.java b/src/main/java/org/bukkit/craftbukkit/CraftFeatureFlag.java
deleted file mode 100644
index da90e5c84a0cc4505a5fff0ed278a905978c6ce2..0000000000000000000000000000000000000000
--- a/src/main/java/org/bukkit/craftbukkit/CraftFeatureFlag.java
+++ /dev/null
@@ -1,51 +0,0 @@
-package org.bukkit.craftbukkit;
-
-import java.util.HashSet;
-import java.util.Set;
-import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.flag.FeatureFlagSet;
-import net.minecraft.world.flag.FeatureFlags;
-import org.bukkit.FeatureFlag;
-import org.bukkit.NamespacedKey;
-import org.bukkit.craftbukkit.util.CraftNamespacedKey;
-import org.jetbrains.annotations.NotNull;
-
-public class CraftFeatureFlag implements FeatureFlag {
-
- private final NamespacedKey namespacedKey;
- private final net.minecraft.world.flag.FeatureFlag featureFlag;
-
- public CraftFeatureFlag(ResourceLocation minecraftKey, net.minecraft.world.flag.FeatureFlag featureFlag) {
- this.namespacedKey = CraftNamespacedKey.fromMinecraft(minecraftKey);
- this.featureFlag = featureFlag;
- }
-
- public net.minecraft.world.flag.FeatureFlag getHandle() {
- return this.featureFlag;
- }
-
- @NotNull
- @Override
- public NamespacedKey getKey() {
- return this.namespacedKey;
- }
-
- @Override
- public String toString() {
- return "CraftFeatureFlag{key=" + this.getKey() + ",keyUniverse=" + this.getHandle().universe.toString() + "}";
- }
-
- public static Set<CraftFeatureFlag> getFromNMS(FeatureFlagSet featureFlagSet) {
- Set<CraftFeatureFlag> set = new HashSet<>();
- FeatureFlags.REGISTRY.names.forEach((minecraftkey, featureflag) -> {
- if (featureFlagSet.contains(featureflag)) {
- set.add(new CraftFeatureFlag(minecraftkey, featureflag));
- }
- });
- return set;
- }
-
- public static CraftFeatureFlag getFromNMS(NamespacedKey namespacedKey) {
- return FeatureFlags.REGISTRY.names.entrySet().stream().filter(entry -> CraftNamespacedKey.fromMinecraft(entry.getKey()).equals(namespacedKey)).findFirst().map(entry -> new CraftFeatureFlag(entry.getKey(), entry.getValue())).orElse(null);
- }
-}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
index 284234fcdd15c4c7a4567c7c887d47bf0b7967f4..c9ecec5da937bc5458f69736b68ff6ae50aa5ebc 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
@@ -558,4 +558,11 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
return !this.getHandle().noCollision(aabb);
}
// Paper end
+
+ // Paper start - feature flag API
+ @Override
+ public java.util.Set<org.bukkit.FeatureFlag> getFeatureFlags() {
+ return io.papermc.paper.world.flag.PaperFeatureFlagProviderImpl.fromNms(this.getHandle().enabledFeatures());
+ }
+ // Paper end - feature flag API
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 90d4834f97d3ba996d46493246b1947511553424..cd3381d8225e0322b3e285b3c4aa0a1265a91cc0 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -2372,10 +2372,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
return this.persistentDataContainer;
}
- @Override
- public Set<FeatureFlag> getFeatureFlags() {
- return CraftFeatureFlag.getFromNMS(this.getHandle().enabledFeatures()).stream().map(FeatureFlag.class::cast).collect(Collectors.toUnmodifiableSet());
- }
+ // Paper - replace feature flag API
public void storeBukkitValues(CompoundTag c) {
if (!this.persistentDataContainer.isEmpty()) {
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockType.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockType.java
index 785d3fe4929e008d4150f3ecab258fd5b6d7cdaf..978e602c38d66c1ac219ffdfe82f9fc777a6ad26 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockType.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockType.java
@@ -33,7 +33,7 @@ import org.bukkit.craftbukkit.util.Handleable;
import org.bukkit.inventory.ItemType;
import org.jetbrains.annotations.NotNull;
-public class CraftBlockType<B extends BlockData> implements BlockType.Typed<B>, Handleable<Block> {
+public class CraftBlockType<B extends BlockData> implements BlockType.Typed<B>, Handleable<Block>, io.papermc.paper.world.flag.PaperFeatureDependent { // Paper - feature flag API
private final NamespacedKey key;
private final Block block;
diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
index c81455a4ee9a3185f125ebf8cec325f4ed2e501d..8d962b055bd6574df7eb5510dd0efd67f579d84a 100644
--- a/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
+++ b/src/main/java/org/bukkit/craftbukkit/generator/CraftWorldInfo.java
@@ -17,6 +17,7 @@ public class CraftWorldInfo implements WorldInfo {
private final long seed;
private final int minHeight;
private final int maxHeight;
+ private final net.minecraft.world.flag.FeatureFlagSet enabledFeatures; // Paper - feature flag API
// Paper start
private final net.minecraft.world.level.chunk.ChunkGenerator vanillaChunkGenerator;
private final net.minecraft.core.RegistryAccess.Frozen registryAccess;
@@ -31,6 +32,7 @@ public class CraftWorldInfo implements WorldInfo {
this.seed = ((PrimaryLevelData) worldDataServer).worldGenOptions().seed();
this.minHeight = dimensionManager.minY();
this.maxHeight = dimensionManager.minY() + dimensionManager.height();
+ this.enabledFeatures = worldDataServer.enabledFeatures(); // Paper - feature flag API
}
@Override
@@ -92,4 +94,11 @@ public class CraftWorldInfo implements WorldInfo {
};
}
// Paper end
+
+ // Paper start - feature flag API
+ @Override
+ public java.util.Set<org.bukkit.FeatureFlag> getFeatureFlags() {
+ return io.papermc.paper.world.flag.PaperFeatureFlagProviderImpl.fromNms(this.enabledFeatures);
+ }
+ // Paper end - feature flag API
}
diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemType.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemType.java
index 450c63c31d2f5d056d989aa00452231f50c8224d..b9d9f1df2720c301915c8b07c0bdc12970128324 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemType.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemType.java
@@ -36,7 +36,7 @@ import org.bukkit.inventory.meta.ItemMeta;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
-public class CraftItemType<M extends ItemMeta> implements ItemType.Typed<M>, Handleable<Item> {
+public class CraftItemType<M extends ItemMeta> implements ItemType.Typed<M>, Handleable<Item>, io.papermc.paper.world.flag.PaperFeatureDependent { // Paper - feature flag API
private final NamespacedKey key;
private final Item item;
diff --git a/src/main/java/org/bukkit/craftbukkit/packs/CraftDataPack.java b/src/main/java/org/bukkit/craftbukkit/packs/CraftDataPack.java
index 9525a7d4602b9b98dcc5e5e60dbcb628a656ae53..a0c0ad832726dcf9c8c25c1cfce2a6ddf770bf0f 100644
--- a/src/main/java/org/bukkit/craftbukkit/packs/CraftDataPack.java
+++ b/src/main/java/org/bukkit/craftbukkit/packs/CraftDataPack.java
@@ -11,7 +11,7 @@ import net.minecraft.util.InclusiveRange;
import org.bukkit.Bukkit;
import org.bukkit.FeatureFlag;
import org.bukkit.NamespacedKey;
-import org.bukkit.craftbukkit.CraftFeatureFlag;
+// import org.bukkit.craftbukkit.CraftFeatureFlag; // Paper - replace feature flag API
import org.bukkit.craftbukkit.CraftServer;
import org.bukkit.craftbukkit.util.CraftChatMessage;
import org.bukkit.packs.DataPack;
@@ -98,7 +98,7 @@ public class CraftDataPack implements DataPack {
@Override
public Set<FeatureFlag> getRequestedFeatures() {
- return CraftFeatureFlag.getFromNMS(this.getHandle().getRequestedFeatures()).stream().map(FeatureFlag.class::cast).collect(Collectors.toUnmodifiableSet());
+ return io.papermc.paper.world.flag.PaperFeatureFlagProviderImpl.fromNms(this.getHandle().getRequestedFeatures()); // Paper - replace feature flag API
}
@Override
diff --git a/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionEffectType.java b/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionEffectType.java
index 6cf790c9fa23ea313423fdaeb7c181bf530828c6..0bcb9df1103050441f8922a688b163dc97c04591 100644
--- a/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionEffectType.java
+++ b/src/main/java/org/bukkit/craftbukkit/potion/CraftPotionEffectType.java
@@ -13,7 +13,7 @@ import org.bukkit.potion.PotionEffectType;
import org.bukkit.potion.PotionEffectTypeCategory;
import org.jetbrains.annotations.NotNull;
-public class CraftPotionEffectType extends PotionEffectType implements Handleable<MobEffect> {
+public class CraftPotionEffectType extends PotionEffectType implements Handleable<MobEffect>, io.papermc.paper.world.flag.PaperFeatureDependent { // Paper - feature flag API
public static PotionEffectType minecraftHolderToBukkit(Holder<MobEffect> minecraft) {
return CraftPotionEffectType.minecraftToBukkit(minecraft.value());
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 28dbe30a98a6730839949bc9a6a90b78619ff84d..7d32c032b63b9c4674489b30c845fe2de8275808 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -47,7 +47,7 @@ import org.bukkit.advancement.Advancement;
import org.bukkit.attribute.Attribute;
import org.bukkit.attribute.AttributeModifier;
import org.bukkit.block.data.BlockData;
-import org.bukkit.craftbukkit.CraftFeatureFlag;
+// import org.bukkit.craftbukkit.CraftFeatureFlag; // Paper
import org.bukkit.craftbukkit.CraftRegistry;
import org.bukkit.craftbukkit.CraftServer;
import org.bukkit.craftbukkit.attribute.CraftAttribute;
@@ -455,11 +455,7 @@ public final class CraftMagicNumbers implements UnsafeValues {
return CraftAttribute.bukkitToMinecraft(attribute).getDescriptionId();
}
- @Override
- public FeatureFlag getFeatureFlag(NamespacedKey namespacedKey) {
- Preconditions.checkArgument(namespacedKey != null, "NamespaceKey cannot be null");
- return CraftFeatureFlag.getFromNMS(namespacedKey);
- }
+ // Paper - replace feature flag API
@Override
public PotionType.InternalPotionData getInternalPotionData(NamespacedKey namespacedKey) {
diff --git a/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlagProvider b/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlagProvider
new file mode 100644
index 0000000000000000000000000000000000000000..c3e6b96013f6dd0b784bd867196552d97f3d8685
--- /dev/null
+++ b/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlagProvider
@@ -0,0 +1 @@
+io.papermc.paper.world.flag.PaperFeatureFlagProviderImpl
diff --git a/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlags$FeatureFlagProvider b/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlags$FeatureFlagProvider
new file mode 100644
index 0000000000000000000000000000000000000000..c3e6b96013f6dd0b784bd867196552d97f3d8685
--- /dev/null
+++ b/src/main/resources/META-INF/services/io.papermc.paper.world.flag.FeatureFlags$FeatureFlagProvider
@@ -0,0 +1 @@
+io.papermc.paper.world.flag.PaperFeatureFlagProviderImpl
diff --git a/src/test/java/io/papermc/paper/world/flag/FeatureFlagTest.java b/src/test/java/io/papermc/paper/world/flag/FeatureFlagTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..1fd830b148468e1db84e0e27d54c4fd6449fa9d8
--- /dev/null
+++ b/src/test/java/io/papermc/paper/world/flag/FeatureFlagTest.java
@@ -0,0 +1,99 @@
+package io.papermc.paper.world.flag;
+
+import io.papermc.paper.adventure.PaperAdventure;
+import io.papermc.paper.registry.PaperRegistries;
+import io.papermc.paper.registry.RegistryAccess;
+import io.papermc.paper.registry.RegistryKey;
+import io.papermc.paper.registry.entry.RegistryEntry;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Stream;
+import net.kyori.adventure.key.Key;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.flag.FeatureElement;
+import net.minecraft.world.flag.FeatureFlagSet;
+import net.minecraft.world.flag.FeatureFlags;
+import org.bukkit.FeatureFlag;
+import org.bukkit.Keyed;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.fail;
+
+class FeatureFlagTest extends AbstractTestingBase {
+
+ @Test
+ void testFeatureFlagParity() {
+ final Set<ResourceLocation> locations = new HashSet<>();
+ for (final FeatureFlag flag : FeatureFlag.ALL_FLAGS.values()) {
+ locations.add(PaperAdventure.asVanilla(flag.getKey()));
+ }
+ FeatureFlags.REGISTRY.fromNames(locations, unknown -> {
+ fail("Unknown api feature flag: " + unknown);
+ });
+
+ for (final ResourceLocation nmsFlag : allNames()) {
+ assertNotNull(FeatureFlag.ALL_FLAGS.value(Key.key(nmsFlag.toString())), "can't find api flag for " + nmsFlag);
+ }
+ }
+
+ @Test
+ void testFeatureFlagConversion() {
+ assertEquals(allNames().size(), PaperFeatureFlagProviderImpl.FLAGS.size());
+ for (final FeatureFlag featureFlag : PaperFeatureFlagProviderImpl.FLAGS.keySet()) {
+ final net.minecraft.world.flag.FeatureFlag nmsFlag = PaperFeatureFlagProviderImpl.FLAGS.get(featureFlag);
+ final ResourceLocation nmsFlagName = FeatureFlags.REGISTRY.toNames(FeatureFlagSet.of(nmsFlag)).iterator().next();
+ assertEquals(nmsFlagName.toString(), featureFlag.key().asString());
+ }
+ }
+
+ static Set<ResourceLocation> allNames() {
+ return FeatureFlags.REGISTRY.toNames(FeatureFlags.REGISTRY.allFlags());
+ }
+
+ @SuppressWarnings({"rawtypes", "unchecked"})
+ static Set<RegistryKey<?>> featureFilteredRegistries() {
+ final Set<RegistryKey<?>> registryKeys = new HashSet<>();
+ for (final ResourceKey filteredRegistry : FeatureElement.FILTERED_REGISTRIES) {
+ if (filteredRegistry == Registries.MENU) continue; // not applicable atm
+ registryKeys.add(PaperRegistries.registryFromNms(filteredRegistry));
+ }
+ return registryKeys;
+ }
+
+ @MethodSource("featureFilteredRegistries")
+ @ParameterizedTest
+ <T extends Keyed> void testApiImplementsFeatureDependant(final RegistryKey<T> registryKey) {
+ final org.bukkit.Registry<T> registry = RegistryAccess.registryAccess().getRegistry(registryKey);
+ final T anyElement = registry.iterator().next();
+ assertInstanceOf(FeatureDependant.class, anyElement, "Registry " + registryKey + " doesn't have feature dependent elements");
+ final FeatureDependant dependant = ((FeatureDependant) anyElement);
+ assertDoesNotThrow(dependant::requiredFeatures, "Failed to get required features for " + anyElement + " in " + registryKey);
+ }
+
+ static Stream<RegistryKey<?>> nonFeatureFilteredRegistries() {
+ return AbstractTestingBase.REGISTRY_CUSTOM.registries().filter(r -> {
+ final RegistryEntry<?, ?> entry = PaperRegistries.getEntry(r.key());
+ // has an API registry and isn't a filtered registry
+ return entry != null && !FeatureElement.FILTERED_REGISTRIES.contains(r.key());
+ }).map(r -> PaperRegistries.getEntry(r.key()).apiKey());
+ }
+
+
+ @MethodSource("nonFeatureFilteredRegistries")
+ @ParameterizedTest
+ <T extends Keyed> void testApiDoesntImplementFeatureDependant(final RegistryKey<T> registryKey) {
+ final org.bukkit.Registry<T> registry = RegistryAccess.registryAccess().getRegistry(registryKey);
+ final T anyElement = registry.iterator().next();
+ assertFalse(anyElement instanceof FeatureDependant, "Registry " + registryKey + " has feature dependent elements");
+ }
+}
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