Paper/patches/server/0626-Fix-upstreams-block-state-factories.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 6 Oct 2021 20:50:48 -0700
Subject: [PATCH] Fix upstreams block state factories

Sometimes, blocks are changed and then logic is called before the associated
tile entity is removed. When this happens, the factories were relying on the
block at the position, not the tile entity. This change prioritizes using the
tile entity type to determine the block state factory and falls back on
the material type of the block at that location.

== AT ==
public net.minecraft.world.level.block.entity.BlockEntityType validBlocks

diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
index 48bee70ba4188a4a55beb6584224b0f23784dd88..cbb777f499a4e8a447153c04d09c0c71321c663c 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
@@ -387,7 +387,7 @@ public abstract class BlockEntity {
         // Paper end
         if (this.level == null) return null;
         org.bukkit.block.Block block = this.level.getWorld().getBlockAt(this.worldPosition.getX(), this.worldPosition.getY(), this.worldPosition.getZ());
-        if (block.getType() == org.bukkit.Material.AIR) return null;
+        // if (block.getType() == org.bukkit.Material.AIR) return null; // Paper - actually get the tile entity if it still exists
         org.bukkit.block.BlockState state = block.getState(useSnapshot); // Paper
         if (state instanceof InventoryHolder) return (InventoryHolder) state;
         return null;
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
index 92133f16c192f5caf9962a08401ff914550747f8..397eb1a101bd60f49dbb2fa8eddf28f6f233167f 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockEntityState.java
@@ -20,7 +20,7 @@ import org.bukkit.persistence.PersistentDataContainer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockState implements TileState {
+public abstract class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockState implements TileState { // Paper - revert upstream's revert of the block state changes
 
     private final T tileEntity;
     private final T snapshot;
@@ -181,14 +181,10 @@ public class CraftBlockEntityState<T extends BlockEntity> extends CraftBlockStat
     }
 
     @Override
-    public CraftBlockEntityState<T> copy() {
-        return new CraftBlockEntityState<>(this, null);
-    }
+    public abstract CraftBlockEntityState<T> copy(); // Paper - make abstract
 
     @Override
-    public CraftBlockEntityState<T> copy(Location location) {
-        return new CraftBlockEntityState<>(this, location);
-    }
+    public abstract CraftBlockEntityState<T> copy(Location location); // Paper - make abstract
 
     // Paper start
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
index 83ac5fc6cbbd249b5865ab203b150f53f01c9f05..b7ff7af2513204b151340538d50a65c850bdb75f 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlockStates.java
@@ -22,6 +22,7 @@ import net.minecraft.world.level.block.entity.BeehiveBlockEntity;
 import net.minecraft.world.level.block.entity.BellBlockEntity;
 import net.minecraft.world.level.block.entity.BlastFurnaceBlockEntity;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityType; // Paper
 import net.minecraft.world.level.block.entity.BrewingStandBlockEntity;
 import net.minecraft.world.level.block.entity.BrushableBlockEntity;
 import net.minecraft.world.level.block.entity.CalibratedSculkSensorBlockEntity;
@@ -87,9 +88,9 @@ public final class CraftBlockStates {
     private static class BlockEntityStateFactory<T extends BlockEntity, B extends CraftBlockEntityState<T>> extends BlockStateFactory<B> {
 
         private final BiFunction<World, T, B> blockStateConstructor;
-        private final BiFunction<BlockPos, net.minecraft.world.level.block.state.BlockState, T> tileEntityConstructor;
+        private final BlockEntityType<? extends T> tileEntityConstructor; // Paper
 
-        protected BlockEntityStateFactory(Class<B> blockStateType, BiFunction<World, T, B> blockStateConstructor, BiFunction<BlockPos, net.minecraft.world.level.block.state.BlockState, T> tileEntityConstructor) {
+        protected BlockEntityStateFactory(Class<B> blockStateType, BiFunction<World, T, B> blockStateConstructor, BlockEntityType<? extends T> tileEntityConstructor) { // Paper
             super(blockStateType);
             this.blockStateConstructor = blockStateConstructor;
             this.tileEntityConstructor = tileEntityConstructor;
@@ -106,7 +107,7 @@ public final class CraftBlockStates {
         }
 
         private T createTileEntity(BlockPos blockPosition, net.minecraft.world.level.block.state.BlockState blockData) {
-            return this.tileEntityConstructor.apply(blockPosition, blockData);
+            return this.tileEntityConstructor.create(blockPosition, blockData); // Paper
         }
 
         private B createBlockState(World world, T tileEntity) {
@@ -118,228 +119,65 @@ public final class CraftBlockStates {
     private static final BlockStateFactory<?> DEFAULT_FACTORY = new BlockStateFactory<CraftBlockState>(CraftBlockState.class) {
         @Override
         public CraftBlockState createBlockState(World world, BlockPos blockPosition, net.minecraft.world.level.block.state.BlockState blockData, BlockEntity tileEntity) {
-            // SPIGOT-6754, SPIGOT-6817: Restore previous behaviour for tile entities with removed blocks (loot generation post-destroy)
-            if (tileEntity != null) {
-                // block with unhandled TileEntity:
-                return new CraftBlockEntityState<>(world, tileEntity);
-            }
+            // Paper - revert upstream's revert of the block state changes. Block entities that have already had the block type set to AIR are still valid, upstream decided to ignore them
             Preconditions.checkState(tileEntity == null, "Unexpected BlockState for %s", CraftBlockType.minecraftToBukkit(blockData.getBlock()));
             return new CraftBlockState(world, blockPosition, blockData);
         }
     };
+    // Paper start
+    private static final Map<BlockEntityType<?>, BlockStateFactory<?>> FACTORIES_BY_BLOCK_ENTITY_TYPE = new HashMap<>();
+    private static void register(BlockEntityType<?> type, BlockStateFactory<?> factory) {
+        FACTORIES_BY_BLOCK_ENTITY_TYPE.put(type, factory);
+    }
+    // Paper end
 
     static {
-        register(
-                Arrays.asList(
-                        Material.ACACIA_SIGN,
-                        Material.ACACIA_WALL_SIGN,
-                        Material.BAMBOO_SIGN,
-                        Material.BAMBOO_WALL_SIGN,
-                        Material.BIRCH_SIGN,
-                        Material.BIRCH_WALL_SIGN,
-                        Material.CHERRY_SIGN,
-                        Material.CHERRY_WALL_SIGN,
-                        Material.CRIMSON_SIGN,
-                        Material.CRIMSON_WALL_SIGN,
-                        Material.DARK_OAK_SIGN,
-                        Material.DARK_OAK_WALL_SIGN,
-                        Material.JUNGLE_SIGN,
-                        Material.JUNGLE_WALL_SIGN,
-                        Material.MANGROVE_SIGN,
-                        Material.MANGROVE_WALL_SIGN,
-                        Material.OAK_SIGN,
-                        Material.OAK_WALL_SIGN,
-                        Material.SPRUCE_SIGN,
-                        Material.SPRUCE_WALL_SIGN,
-                        Material.WARPED_SIGN,
-                        Material.WARPED_WALL_SIGN
-                ), CraftSign.class, CraftSign::new, SignBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.ACACIA_HANGING_SIGN,
-                        Material.ACACIA_WALL_HANGING_SIGN,
-                        Material.BAMBOO_HANGING_SIGN,
-                        Material.BAMBOO_WALL_HANGING_SIGN,
-                        Material.BIRCH_HANGING_SIGN,
-                        Material.BIRCH_WALL_HANGING_SIGN,
-                        Material.CHERRY_HANGING_SIGN,
-                        Material.CHERRY_WALL_HANGING_SIGN,
-                        Material.CRIMSON_HANGING_SIGN,
-                        Material.CRIMSON_WALL_HANGING_SIGN,
-                        Material.DARK_OAK_HANGING_SIGN,
-                        Material.DARK_OAK_WALL_HANGING_SIGN,
-                        Material.JUNGLE_HANGING_SIGN,
-                        Material.JUNGLE_WALL_HANGING_SIGN,
-                        Material.MANGROVE_HANGING_SIGN,
-                        Material.MANGROVE_WALL_HANGING_SIGN,
-                        Material.OAK_HANGING_SIGN,
-                        Material.OAK_WALL_HANGING_SIGN,
-                        Material.SPRUCE_HANGING_SIGN,
-                        Material.SPRUCE_WALL_HANGING_SIGN,
-                        Material.WARPED_HANGING_SIGN,
-                        Material.WARPED_WALL_HANGING_SIGN
-                ), CraftHangingSign.class, CraftHangingSign::new, HangingSignBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.CREEPER_HEAD,
-                        Material.CREEPER_WALL_HEAD,
-                        Material.DRAGON_HEAD,
-                        Material.DRAGON_WALL_HEAD,
-                        Material.PIGLIN_HEAD,
-                        Material.PIGLIN_WALL_HEAD,
-                        Material.PLAYER_HEAD,
-                        Material.PLAYER_WALL_HEAD,
-                        Material.SKELETON_SKULL,
-                        Material.SKELETON_WALL_SKULL,
-                        Material.WITHER_SKELETON_SKULL,
-                        Material.WITHER_SKELETON_WALL_SKULL,
-                        Material.ZOMBIE_HEAD,
-                        Material.ZOMBIE_WALL_HEAD
-                ), CraftSkull.class, CraftSkull::new, SkullBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.COMMAND_BLOCK,
-                        Material.REPEATING_COMMAND_BLOCK,
-                        Material.CHAIN_COMMAND_BLOCK
-                ), CraftCommandBlock.class, CraftCommandBlock::new, CommandBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.BLACK_BANNER,
-                        Material.BLACK_WALL_BANNER,
-                        Material.BLUE_BANNER,
-                        Material.BLUE_WALL_BANNER,
-                        Material.BROWN_BANNER,
-                        Material.BROWN_WALL_BANNER,
-                        Material.CYAN_BANNER,
-                        Material.CYAN_WALL_BANNER,
-                        Material.GRAY_BANNER,
-                        Material.GRAY_WALL_BANNER,
-                        Material.GREEN_BANNER,
-                        Material.GREEN_WALL_BANNER,
-                        Material.LIGHT_BLUE_BANNER,
-                        Material.LIGHT_BLUE_WALL_BANNER,
-                        Material.LIGHT_GRAY_BANNER,
-                        Material.LIGHT_GRAY_WALL_BANNER,
-                        Material.LIME_BANNER,
-                        Material.LIME_WALL_BANNER,
-                        Material.MAGENTA_BANNER,
-                        Material.MAGENTA_WALL_BANNER,
-                        Material.ORANGE_BANNER,
-                        Material.ORANGE_WALL_BANNER,
-                        Material.PINK_BANNER,
-                        Material.PINK_WALL_BANNER,
-                        Material.PURPLE_BANNER,
-                        Material.PURPLE_WALL_BANNER,
-                        Material.RED_BANNER,
-                        Material.RED_WALL_BANNER,
-                        Material.WHITE_BANNER,
-                        Material.WHITE_WALL_BANNER,
-                        Material.YELLOW_BANNER,
-                        Material.YELLOW_WALL_BANNER
-                ), CraftBanner.class, CraftBanner::new, BannerBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.SHULKER_BOX,
-                        Material.WHITE_SHULKER_BOX,
-                        Material.ORANGE_SHULKER_BOX,
-                        Material.MAGENTA_SHULKER_BOX,
-                        Material.LIGHT_BLUE_SHULKER_BOX,
-                        Material.YELLOW_SHULKER_BOX,
-                        Material.LIME_SHULKER_BOX,
-                        Material.PINK_SHULKER_BOX,
-                        Material.GRAY_SHULKER_BOX,
-                        Material.LIGHT_GRAY_SHULKER_BOX,
-                        Material.CYAN_SHULKER_BOX,
-                        Material.PURPLE_SHULKER_BOX,
-                        Material.BLUE_SHULKER_BOX,
-                        Material.BROWN_SHULKER_BOX,
-                        Material.GREEN_SHULKER_BOX,
-                        Material.RED_SHULKER_BOX,
-                        Material.BLACK_SHULKER_BOX
-                ), CraftShulkerBox.class, CraftShulkerBox::new, ShulkerBoxBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.BLACK_BED,
-                        Material.BLUE_BED,
-                        Material.BROWN_BED,
-                        Material.CYAN_BED,
-                        Material.GRAY_BED,
-                        Material.GREEN_BED,
-                        Material.LIGHT_BLUE_BED,
-                        Material.LIGHT_GRAY_BED,
-                        Material.LIME_BED,
-                        Material.MAGENTA_BED,
-                        Material.ORANGE_BED,
-                        Material.PINK_BED,
-                        Material.PURPLE_BED,
-                        Material.RED_BED,
-                        Material.WHITE_BED,
-                        Material.YELLOW_BED
-                ), CraftBed.class, CraftBed::new, BedBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.BEEHIVE,
-                        Material.BEE_NEST
-                ), CraftBeehive.class, CraftBeehive::new, BeehiveBlockEntity::new
-        );
-
-        register(
-                Arrays.asList(
-                        Material.CAMPFIRE,
-                        Material.SOUL_CAMPFIRE
-                ), CraftCampfire.class, CraftCampfire::new, CampfireBlockEntity::new
-        );
-
-        register(Material.BARREL, CraftBarrel.class, CraftBarrel::new, BarrelBlockEntity::new);
-        register(Material.BEACON, CraftBeacon.class, CraftBeacon::new, BeaconBlockEntity::new);
-        register(Material.BELL, CraftBell.class, CraftBell::new, BellBlockEntity::new);
-        register(Material.BLAST_FURNACE, CraftBlastFurnace.class, CraftBlastFurnace::new, BlastFurnaceBlockEntity::new);
-        register(Material.BREWING_STAND, CraftBrewingStand.class, CraftBrewingStand::new, BrewingStandBlockEntity::new);
-        register(Material.CHEST, CraftChest.class, CraftChest::new, ChestBlockEntity::new);
-        register(Material.CHISELED_BOOKSHELF, CraftChiseledBookshelf.class, CraftChiseledBookshelf::new, ChiseledBookShelfBlockEntity::new);
-        register(Material.COMPARATOR, CraftComparator.class, CraftComparator::new, ComparatorBlockEntity::new);
-        register(Material.CONDUIT, CraftConduit.class, CraftConduit::new, ConduitBlockEntity::new);
-        register(Material.DAYLIGHT_DETECTOR, CraftDaylightDetector.class, CraftDaylightDetector::new, DaylightDetectorBlockEntity::new);
-        register(Material.DECORATED_POT, CraftDecoratedPot.class, CraftDecoratedPot::new, DecoratedPotBlockEntity::new);
-        register(Material.DISPENSER, CraftDispenser.class, CraftDispenser::new, DispenserBlockEntity::new);
-        register(Material.DROPPER, CraftDropper.class, CraftDropper::new, DropperBlockEntity::new);
-        register(Material.ENCHANTING_TABLE, CraftEnchantingTable.class, CraftEnchantingTable::new, EnchantingTableBlockEntity::new);
-        register(Material.ENDER_CHEST, CraftEnderChest.class, CraftEnderChest::new, EnderChestBlockEntity::new);
-        register(Material.END_GATEWAY, CraftEndGateway.class, CraftEndGateway::new, TheEndGatewayBlockEntity::new);
-        register(Material.END_PORTAL, CraftEndPortal.class, CraftEndPortal::new, TheEndPortalBlockEntity::new);
-        register(Material.FURNACE, CraftFurnaceFurnace.class, CraftFurnaceFurnace::new, FurnaceBlockEntity::new);
-        register(Material.HOPPER, CraftHopper.class, CraftHopper::new, HopperBlockEntity::new);
-        register(Material.JIGSAW, CraftJigsaw.class, CraftJigsaw::new, JigsawBlockEntity::new);
-        register(Material.JUKEBOX, CraftJukebox.class, CraftJukebox::new, JukeboxBlockEntity::new);
-        register(Material.LECTERN, CraftLectern.class, CraftLectern::new, LecternBlockEntity::new);
-        register(Material.MOVING_PISTON, CraftMovingPiston.class, CraftMovingPiston::new, PistonMovingBlockEntity::new);
-        register(Material.SCULK_CATALYST, CraftSculkCatalyst.class, CraftSculkCatalyst::new, SculkCatalystBlockEntity::new);
-        register(Material.CALIBRATED_SCULK_SENSOR, CraftCalibratedSculkSensor.class, CraftCalibratedSculkSensor::new, CalibratedSculkSensorBlockEntity::new);
-        register(Material.SCULK_SENSOR, CraftSculkSensor.class, CraftSculkSensor::new, SculkSensorBlockEntity::new);
-        register(Material.SCULK_SHRIEKER, CraftSculkShrieker.class, CraftSculkShrieker::new, SculkShriekerBlockEntity::new);
-        register(Material.SMOKER, CraftSmoker.class, CraftSmoker::new, SmokerBlockEntity::new);
-        register(Material.SPAWNER, CraftCreatureSpawner.class, CraftCreatureSpawner::new, SpawnerBlockEntity::new);
-        register(Material.STRUCTURE_BLOCK, CraftStructureBlock.class, CraftStructureBlock::new, StructureBlockEntity::new);
-        register(Material.SUSPICIOUS_SAND, CraftSuspiciousSand.class, CraftSuspiciousSand::new, BrushableBlockEntity::new);
-        register(Material.SUSPICIOUS_GRAVEL, CraftBrushableBlock.class, CraftBrushableBlock::new, BrushableBlockEntity::new);
-        register(Material.TRAPPED_CHEST, CraftChest.class, CraftChest::new, TrappedChestBlockEntity::new);
-        register(Material.CRAFTER, CraftCrafter.class, CraftCrafter::new, CrafterBlockEntity::new);
-        register(Material.TRIAL_SPAWNER, CraftTrialSpawner.class, CraftTrialSpawner::new, TrialSpawnerBlockEntity::new);
-        register(Material.VAULT, CraftVault.class, CraftVault::new, VaultBlockEntity::new);
+        // Paper start - simplify
+        register(BlockEntityType.SIGN, CraftSign.class, CraftSign::new);
+        register(BlockEntityType.HANGING_SIGN, CraftHangingSign.class, CraftHangingSign::new);
+        register(BlockEntityType.SKULL, CraftSkull.class, CraftSkull::new);
+        register(BlockEntityType.COMMAND_BLOCK, CraftCommandBlock.class, CraftCommandBlock::new);
+        register(BlockEntityType.BANNER, CraftBanner.class, CraftBanner::new);
+        register(BlockEntityType.SHULKER_BOX, CraftShulkerBox.class, CraftShulkerBox::new);
+        register(BlockEntityType.BED, CraftBed.class, CraftBed::new);
+        register(BlockEntityType.BEEHIVE, CraftBeehive.class, CraftBeehive::new);
+        register(BlockEntityType.CAMPFIRE, CraftCampfire.class, CraftCampfire::new);
+        register(BlockEntityType.BARREL, CraftBarrel.class, CraftBarrel::new);
+        register(BlockEntityType.BEACON, CraftBeacon.class, CraftBeacon::new);
+        register(BlockEntityType.BELL, CraftBell.class, CraftBell::new);
+        register(BlockEntityType.BLAST_FURNACE, CraftBlastFurnace.class, CraftBlastFurnace::new);
+        register(BlockEntityType.BREWING_STAND, CraftBrewingStand.class, CraftBrewingStand::new);
+        register(BlockEntityType.CHEST, CraftChest.class, CraftChest::new);
+        register(BlockEntityType.CHISELED_BOOKSHELF, CraftChiseledBookshelf.class, CraftChiseledBookshelf::new);
+        register(BlockEntityType.COMPARATOR, CraftComparator.class, CraftComparator::new);
+        register(BlockEntityType.CONDUIT, CraftConduit.class, CraftConduit::new);
+        register(BlockEntityType.DAYLIGHT_DETECTOR, CraftDaylightDetector.class, CraftDaylightDetector::new);
+        register(BlockEntityType.DECORATED_POT, CraftDecoratedPot.class, CraftDecoratedPot::new);
+        register(BlockEntityType.DISPENSER, CraftDispenser.class, CraftDispenser::new);
+        register(BlockEntityType.DROPPER, CraftDropper.class, CraftDropper::new);
+        register(BlockEntityType.ENCHANTING_TABLE, CraftEnchantingTable.class, CraftEnchantingTable::new);
+        register(BlockEntityType.ENDER_CHEST, CraftEnderChest.class, CraftEnderChest::new);
+        register(BlockEntityType.END_GATEWAY, CraftEndGateway.class, CraftEndGateway::new);
+        register(BlockEntityType.END_PORTAL, CraftEndPortal.class, CraftEndPortal::new);
+        register(BlockEntityType.FURNACE, CraftFurnaceFurnace.class, CraftFurnaceFurnace::new);
+        register(BlockEntityType.HOPPER, CraftHopper.class, CraftHopper::new);
+        register(BlockEntityType.JIGSAW, CraftJigsaw.class, CraftJigsaw::new);
+        register(BlockEntityType.JUKEBOX, CraftJukebox.class, CraftJukebox::new);
+        register(BlockEntityType.LECTERN, CraftLectern.class, CraftLectern::new);
+        register(BlockEntityType.PISTON, CraftMovingPiston.class, CraftMovingPiston::new);
+        register(BlockEntityType.SCULK_CATALYST, CraftSculkCatalyst.class, CraftSculkCatalyst::new);
+        register(BlockEntityType.SCULK_SENSOR, CraftSculkSensor.class, CraftSculkSensor::new);
+        register(BlockEntityType.SCULK_SHRIEKER, CraftSculkShrieker.class, CraftSculkShrieker::new);
+        register(BlockEntityType.CALIBRATED_SCULK_SENSOR, CraftCalibratedSculkSensor.class, CraftCalibratedSculkSensor::new);
+        register(BlockEntityType.SMOKER, CraftSmoker.class, CraftSmoker::new);
+        register(BlockEntityType.MOB_SPAWNER, CraftCreatureSpawner.class, CraftCreatureSpawner::new);
+        register(BlockEntityType.STRUCTURE_BLOCK, CraftStructureBlock.class, CraftStructureBlock::new);
+        register(BlockEntityType.BRUSHABLE_BLOCK, CraftBrushableBlock.class, CraftBrushableBlock::new); // note: spigot still uses CraftSuspiciousSand impl for that block type
+        register(BlockEntityType.TRAPPED_CHEST, CraftChest.class, CraftChest::new);
+        register(BlockEntityType.CRAFTER, CraftCrafter.class, CraftCrafter::new);
+        register(BlockEntityType.TRIAL_SPAWNER, CraftTrialSpawner.class, CraftTrialSpawner::new);
+        register(BlockEntityType.VAULT, CraftVault.class, CraftVault::new);
+        // Paper end
     }
 
     private static void register(Material blockType, BlockStateFactory<?> factory) {
@@ -347,30 +185,33 @@ public final class CraftBlockStates {
     }
 
     private static <T extends BlockEntity, B extends CraftBlockEntityState<T>> void register(
-            Material blockType,
+            net.minecraft.world.level.block.entity.BlockEntityType<? extends T> blockEntityType, // Paper
             Class<B> blockStateType,
-            BiFunction<World, T, B> blockStateConstructor,
-            BiFunction<BlockPos, net.minecraft.world.level.block.state.BlockState, T> tileEntityConstructor
+            BiFunction<World, T, B> blockStateConstructor // Paper
     ) {
-        CraftBlockStates.register(Collections.singletonList(blockType), blockStateType, blockStateConstructor, tileEntityConstructor);
-    }
-
-    private static <T extends BlockEntity, B extends CraftBlockEntityState<T>> void register(
-            List<Material> blockTypes,
-            Class<B> blockStateType,
-            BiFunction<World, T, B> blockStateConstructor,
-            BiFunction<BlockPos, net.minecraft.world.level.block.state.BlockState, T> tileEntityConstructor
-    ) {
-        BlockStateFactory<B> factory = new BlockEntityStateFactory<>(blockStateType, blockStateConstructor, tileEntityConstructor);
-        for (Material blockType : blockTypes) {
-            CraftBlockStates.register(blockType, factory);
+        // Paper start
+        BlockStateFactory<B> factory = new BlockEntityStateFactory<>(blockStateType, blockStateConstructor, blockEntityType); // Paper
+        for (net.minecraft.world.level.block.Block block : blockEntityType.validBlocks) {
+            CraftBlockStates.register(CraftBlockType.minecraftToBukkit(block), factory);
         }
+        CraftBlockStates.register(blockEntityType, factory);
+        // Paper end
     }
 
     private static BlockStateFactory<?> getFactory(Material material) {
         return CraftBlockStates.FACTORIES.getOrDefault(material, CraftBlockStates.DEFAULT_FACTORY);
     }
 
+    // Paper start
+    private static BlockStateFactory<?> getFactory(Material material, BlockEntityType<?> type) {
+        if (type != null) {
+            return CraftBlockStates.FACTORIES_BY_BLOCK_ENTITY_TYPE.getOrDefault(type, getFactory(material));
+        } else {
+            return getFactory(material);
+        }
+    }
+    // Paper end
+
     public static Class<? extends CraftBlockState> getBlockStateType(Material material) {
         Preconditions.checkNotNull(material, "material is null");
         return CraftBlockStates.getFactory(material).blockStateType;
@@ -386,6 +227,13 @@ public final class CraftBlockStates {
         return null;
     }
 
+    // Paper start
+    public static Class<? extends CraftBlockState> getBlockStateType(BlockEntityType<?> blockEntityType) {
+        Preconditions.checkNotNull(blockEntityType, "blockEntityType is null");
+        return CraftBlockStates.getFactory(null, blockEntityType).blockStateType;
+    }
+    // Paper end
+
     public static BlockState getBlockState(Block block) {
         // Paper start
         return CraftBlockStates.getBlockState(block, true);
@@ -453,7 +301,7 @@ public final class CraftBlockStates {
         if (world != null && tileEntity == null && CraftBlockStates.isTileEntityOptional(material)) {
             factory = CraftBlockStates.DEFAULT_FACTORY;
         } else {
-            factory = CraftBlockStates.getFactory(material);
+            factory = CraftBlockStates.getFactory(material, tileEntity != null ? tileEntity.getType() : null); // Paper
         }
         return factory.createBlockState(world, blockPosition, blockData, tileEntity);
     }
@@ -472,6 +320,14 @@ public final class CraftBlockStates {
         return new CraftBlockState(CraftBlock.at(world, pos), flag);
     }
 
+    // Paper start
+    @Nullable
+    public static BlockEntityType<?> getBlockEntityType(final Material material) {
+        final BlockStateFactory<?> factory = org.bukkit.craftbukkit.block.CraftBlockStates.FACTORIES.get(material);
+        return factory instanceof final BlockEntityStateFactory<?,?> blockEntityStateFactory ? blockEntityStateFactory.tileEntityConstructor : null;
+    }
+    // Paper end
+
     private CraftBlockStates() {
     }
 }
diff --git a/src/test/java/org/bukkit/craftbukkit/block/BlockStateTest.java b/src/test/java/org/bukkit/craftbukkit/block/BlockStateTest.java
index 81d4c8867ebcba1b805be1828e0a6a476963a855..9ff1a8068533ba5fc2fb43188d9a5c544a907618 100644
--- a/src/test/java/org/bukkit/craftbukkit/block/BlockStateTest.java
+++ b/src/test/java/org/bukkit/craftbukkit/block/BlockStateTest.java
@@ -7,6 +7,7 @@ import net.minecraft.core.registries.BuiltInRegistries;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.EntityBlock;
 import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntityType;
 import org.bukkit.Material;
 import org.bukkit.support.AbstractTestingBase;
 import org.junit.jupiter.api.Test;
@@ -41,4 +42,13 @@ public class BlockStateTest extends AbstractTestingBase {
             }
         }
     }
+
+    // Paper start
+    @Test
+    public void testBlockEntityTypes() {
+        for (var blockEntityType : BuiltInRegistries.BLOCK_ENTITY_TYPE) {
+            org.junit.jupiter.api.Assertions.assertNotNull(CraftBlockStates.getBlockStateType(blockEntityType));
+        }
+    }
+    // Paper end
 }