Implement tile entities to generation using Populators (#3665)

* Implement tile entities to generation using Populators
 - Fixes #3051

* Javadocs

* Don't do the big error if heads don't work

* Address comments regarding javadocs/comments

* Ensure Location is still sealed, and add api description annotation to public methods in UncheckedWorldLocation

* Clean up HybridGen
 - There's no need for while loops acting as a modulo after we've already performed a modulo
 - Make the code-sections calculating if positions are in the wall/road more readable
 - Collaps duplicate if-elseif bodies

* Better exception handling when setting data to LimitedRegion during chunk population

* Address comments

Co-authored-by: Alexander Brandes <mc.cache@web.de>

* Better naming for "legacy" block state populator

Co-authored-by: Alexander Brandes <mc.cache@web.de>

Bukkit/src/main/java/com/plotsquared/bukkit/generator/BlockStatePopulator.java

@@ -25,17 +25,18 @@
  */
 package com.plotsquared.bukkit.generator;
 
-import com.plotsquared.core.PlotSquared;
+import com.plotsquared.bukkit.queue.LimitedRegionWrapperQueue;
+import com.plotsquared.core.generator.HybridPlotWorld;
 import com.plotsquared.core.generator.IndependentPlotGenerator;
-import com.plotsquared.core.location.ChunkWrapper;
+import com.plotsquared.core.location.Location;
+import com.plotsquared.core.location.UncheckedWorldLocation;
 import com.plotsquared.core.plot.PlotArea;
 import com.plotsquared.core.plot.world.PlotAreaManager;
-import com.plotsquared.core.queue.QueueCoordinator;
+import com.plotsquared.core.plot.world.SinglePlotArea;
 import com.plotsquared.core.queue.ScopedQueueCoordinator;
-import com.sk89q.worldedit.bukkit.BukkitWorld;
-import org.bukkit.Chunk;
-import org.bukkit.World;
 import org.bukkit.generator.BlockPopulator;
+import org.bukkit.generator.LimitedRegion;
+import org.bukkit.generator.WorldInfo;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.util.Random;
@@ -43,35 +44,51 @@ import java.util.Random;
 final class BlockStatePopulator extends BlockPopulator {
 
     private final IndependentPlotGenerator plotGenerator;
-    private final PlotAreaManager plotAreaManager;
 
-    private QueueCoordinator queue;
+    /**
+     * @since TODO
+     */
+    public BlockStatePopulator(
+            final @NonNull IndependentPlotGenerator plotGenerator
+    ) {
+        this.plotGenerator = plotGenerator;
+    }
 
+    /**
+     * @deprecated Use {@link BlockStatePopulator#BlockStatePopulator(IndependentPlotGenerator)} as plotAreManager is unused
+     */
+    @Deprecated(forRemoval = true, since = "TODO")
     public BlockStatePopulator(
             final @NonNull IndependentPlotGenerator plotGenerator,
             final @NonNull PlotAreaManager plotAreaManager
     ) {
         this.plotGenerator = plotGenerator;
-        this.plotAreaManager = plotAreaManager;
     }
 
     @Override
-    public void populate(final @NonNull World world, final @NonNull Random random, final @NonNull Chunk source) {
-        if (this.queue == null) {
-            this.queue = PlotSquared.platform().globalBlockQueue().getNewQueue(new BukkitWorld(world));
-        }
-        final PlotArea area = this.plotAreaManager.getPlotArea(world.getName(), null);
-        if (area == null) {
+    public void populate(
+            @NonNull final WorldInfo worldInfo,
+            @NonNull final Random random,
+            final int chunkX,
+            final int chunkZ,
+            @NonNull final LimitedRegion limitedRegion
+    ) {
+        PlotArea area = UncheckedWorldLocation.at(worldInfo.getName(), chunkX << 4, 0, chunkZ << 4).getPlotArea();
+        if (area == null || (area instanceof HybridPlotWorld hpw && !hpw.populationNeeded()) || area instanceof SinglePlotArea) {
             return;
         }
-        final ChunkWrapper wrap = new ChunkWrapper(area.getWorldName(), source.getX(), source.getZ());
-        final ScopedQueueCoordinator chunk = this.queue.getForChunk(wrap.x, wrap.z,
-                com.plotsquared.bukkit.util.BukkitWorld.getMinWorldHeight(world),
-                com.plotsquared.bukkit.util.BukkitWorld.getMaxWorldHeight(world) - 1
+        LimitedRegionWrapperQueue wrapped = new LimitedRegionWrapperQueue(limitedRegion);
+        // It is possible for the region to be larger than the chunk, but there is no reason for P2 to need to populate
+        // outside of the actual chunk area.
+        Location min = UncheckedWorldLocation.at(worldInfo.getName(), chunkX << 4, worldInfo.getMinHeight(), chunkZ << 4);
+        Location max = UncheckedWorldLocation.at(
+                worldInfo.getName(),
+                (chunkX << 4) + 15,
+                worldInfo.getMaxHeight(),
+                (chunkZ << 4) + 15
         );
-        if (this.plotGenerator.populateChunk(chunk, area)) {
-            this.queue.enqueue();
-        }
+        ScopedQueueCoordinator offsetChunkQueue = new ScopedQueueCoordinator(wrapped, min, max);
+        this.plotGenerator.populateChunk(offsetChunkQueue, area);
     }
 
 }

Bukkit/src/main/java/com/plotsquared/bukkit/generator/BukkitPlotGenerator.java

@@ -49,8 +49,7 @@ import java.util.List;
 import java.util.Random;
 import java.util.Set;
 
-public class BukkitPlotGenerator extends ChunkGenerator
-        implements GeneratorWrapper<ChunkGenerator> {
+public class BukkitPlotGenerator extends ChunkGenerator implements GeneratorWrapper<ChunkGenerator> {
 
     @SuppressWarnings("unused")
     public final boolean PAPER_ASYNC_SAFE = true;
@@ -73,7 +72,12 @@ public class BukkitPlotGenerator extends ChunkGenerator
         this.plotGenerator = generator;
         this.platformGenerator = this;
         this.populators = new ArrayList<>();
-        this.populators.add(new BlockStatePopulator(this.plotGenerator, this.plotAreaManager));
+        int minecraftMinorVersion = PlotSquared.platform().serverVersion()[1];
+        if (minecraftMinorVersion >= 17) {
+            this.populators.add(new BlockStatePopulator(this.plotGenerator));
+        } else {
+            this.populators.add(new LegacyBlockStatePopulator(this.plotGenerator));
+        }
         this.full = true;
     }
 
@@ -169,7 +173,6 @@ public class BukkitPlotGenerator extends ChunkGenerator
             @NonNull World world, @NonNull Random random, int x, int z,
             @NonNull BiomeGrid biome
     ) {
-
         int minY = BukkitWorld.getMinWorldHeight(world);
         int maxY = BukkitWorld.getMaxWorldHeight(world);
         GenChunk result = new GenChunk(minY, maxY);

Bukkit/src/main/java/com/plotsquared/bukkit/generator/LegacyBlockStatePopulator.java

@@ -0,0 +1,81 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *               Copyright (C) 2014 - 2022 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.bukkit.generator;
+
+import com.plotsquared.core.PlotSquared;
+import com.plotsquared.core.generator.HybridPlotWorld;
+import com.plotsquared.core.generator.IndependentPlotGenerator;
+import com.plotsquared.core.location.Location;
+import com.plotsquared.core.location.UncheckedWorldLocation;
+import com.plotsquared.core.plot.PlotArea;
+import com.plotsquared.core.plot.world.SinglePlotArea;
+import com.plotsquared.core.queue.QueueCoordinator;
+import com.plotsquared.core.queue.ScopedQueueCoordinator;
+import com.sk89q.worldedit.bukkit.BukkitWorld;
+import com.sk89q.worldedit.util.SideEffectSet;
+import org.bukkit.Chunk;
+import org.bukkit.World;
+import org.bukkit.generator.BlockPopulator;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Random;
+
+final class LegacyBlockStatePopulator extends BlockPopulator {
+
+    private final IndependentPlotGenerator plotGenerator;
+
+    /**
+     * @since TODO
+     */
+    public LegacyBlockStatePopulator(
+            final @NonNull IndependentPlotGenerator plotGenerator
+    ) {
+        this.plotGenerator = plotGenerator;
+    }
+
+    @Override
+    public void populate(@NotNull final World world, @NotNull final Random random, @NotNull final Chunk source) {
+        int chunkMinX = source.getX() << 4;
+        int chunkMinZ = source.getZ() << 4;
+        PlotArea area = Location.at(world.getName(), chunkMinX, 0, chunkMinZ).getPlotArea();
+        if (area == null || (area instanceof HybridPlotWorld hpw && !hpw.populationNeeded()) || area instanceof SinglePlotArea) {
+            return;
+        }
+
+        QueueCoordinator queue = PlotSquared.platform().globalBlockQueue().getNewQueue(new BukkitWorld(world));
+        queue.setForceSync(true);
+        queue.setSideEffectSet(SideEffectSet.none());
+        queue.setBiomesEnabled(false);
+        queue.setChunkObject(source);
+        Location min = UncheckedWorldLocation.at(world.getName(), chunkMinX, world.getMinHeight(), chunkMinZ);
+        Location max = UncheckedWorldLocation.at(world.getName(), chunkMinX + 15, world.getMaxHeight(), chunkMinZ + 15);
+        ScopedQueueCoordinator offsetChunkQueue = new ScopedQueueCoordinator(queue, min, max);
+        this.plotGenerator.populateChunk(offsetChunkQueue, area);
+        queue.enqueue();
+    }
+
+}

Bukkit/src/main/java/com/plotsquared/bukkit/queue/LimitedRegionWrapperQueue.java

@@ -0,0 +1,128 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *               Copyright (C) 2014 - 2022 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.bukkit.queue;
+
+import com.plotsquared.bukkit.schematic.StateWrapper;
+import com.plotsquared.core.queue.DelegateQueueCoordinator;
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.function.pattern.Pattern;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.world.block.BaseBlock;
+import com.sk89q.worldedit.world.block.BlockState;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.bukkit.Location;
+import org.bukkit.entity.EntityType;
+import org.bukkit.generator.LimitedRegion;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Wraps a {@link LimitedRegion} inside a {@link com.plotsquared.core.queue.QueueCoordinator} so it can be written to.
+ *
+ * @since TODO
+ */
+public class LimitedRegionWrapperQueue extends DelegateQueueCoordinator {
+
+    private static final Logger LOGGER = LogManager.getLogger("PlotSquared/" + LimitedRegionWrapperQueue.class.getSimpleName());
+
+    private final LimitedRegion limitedRegion;
+
+    /**
+     * @since TODO
+     */
+    public LimitedRegionWrapperQueue(LimitedRegion limitedRegion) {
+        super(null);
+        this.limitedRegion = limitedRegion;
+    }
+
+    @Override
+    public boolean setBlock(final int x, final int y, final int z, @NonNull final Pattern pattern) {
+        return setBlock(x, y, z, pattern.applyBlock(BlockVector3.at(x, y, z)));
+    }
+
+    @Override
+    public boolean setBlock(final int x, final int y, final int z, @NonNull final BaseBlock id) {
+        boolean result = setBlock(x, y, z, id.toImmutableState());
+        if (result && id.hasNbtData()) {
+            CompoundTag tag = id.getNbtData();
+            StateWrapper sw = new StateWrapper(tag);
+            try {
+                sw.restoreTag(limitedRegion.getBlockState(x, y, z).getBlock());
+            } catch (IllegalArgumentException e) {
+                LOGGER.error("Error attempting to populate tile entity into the world at location {},{},{}", x, y, z, e);
+                return false;
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public boolean setBlock(final int x, final int y, final int z, @NonNull final BlockState id) {
+        try {
+            limitedRegion.setType(x, y, z, BukkitAdapter.adapt(id.getBlockType()));
+            limitedRegion.setBlockData(x, y, z, BukkitAdapter.adapt(id));
+        } catch (IllegalArgumentException e) {
+            LOGGER.error("Error attempting to populate block into the world at location {},{},{}", x, y, z, e);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean setEntity(@NonNull final Entity entity) {
+        EntityType type = BukkitAdapter.adapt(entity.getState().getType());
+        double x = entity.getLocation().getX();
+        double y = entity.getLocation().getY();
+        double z = entity.getLocation().getZ();
+        Location location = new Location(limitedRegion.getWorld(), x, y, z);
+        try {
+            limitedRegion.spawnEntity(location, type);
+        } catch (IllegalArgumentException e) {
+            LOGGER.error("Error attempting to populate entity into the world at location {},{},{}", (int) x, (int) y, (int) z, e);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean setTile(final int x, final int y, final int z, @NonNull final CompoundTag tag) {
+        StateWrapper sw = new StateWrapper(tag);
+        try {
+            return sw.restoreTag(limitedRegion.getBlockState(x, y, z).getBlock());
+        } catch (IllegalArgumentException e) {
+            LOGGER.error("Error attempting to populate tile entity into the world at location {},{},{}", x, y, z, e);
+            return false;
+        }
+    }
+
+    @Override
+    public boolean isSettingTiles() {
+        return true;
+    }
+
+}

Bukkit/src/main/java/com/plotsquared/bukkit/schematic/StateWrapper.java

@@ -35,11 +35,13 @@ import com.sk89q.jnbt.Tag;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.bukkit.BukkitAdapter;
 import com.sk89q.worldedit.world.item.ItemType;
+import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.Container;
 import org.bukkit.block.Sign;
+import org.bukkit.block.Skull;
 import org.bukkit.enchantments.Enchantment;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.InventoryHolder;
@@ -57,6 +59,11 @@ public class StateWrapper {
     public org.bukkit.block.BlockState state = null;
     public CompoundTag tag = null;
 
+    /**
+     * @deprecated in favour of using WE methods for obtaining NBT, specifically by obtaining a
+     *         {@link com.sk89q.worldedit.world.block.BaseBlock} and then using {@link com.sk89q.worldedit.world.block.BaseBlock#getNbtData()}
+     */
+    @Deprecated(forRemoval = true, since = "TODO")
     public StateWrapper(org.bukkit.block.BlockState state) {
         this.state = state;
     }
@@ -230,10 +237,37 @@ public class StateWrapper {
                 }
                 return false;
             }
+            case "skull" -> {
+                if (state instanceof Skull skull) {
+                    CompoundTag skullOwner = ((CompoundTag) this.tag.getValue().get("SkullOwner"));
+                    if (skullOwner == null) {
+                        return true;
+                    }
+                    String player = skullOwner.getString("Name");
+                    if (player == null || player.isEmpty()) {
+                        return false;
+                    }
+                    try {
+                        skull.setOwningPlayer(Bukkit.getOfflinePlayer(player));
+                        skull.update(true);
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                    return true;
+                }
+                return false;
+            }
         }
         return false;
     }
 
+    /**
+     * Get a CompoundTag of the contents of a block's inventory (chest, furnace, etc.).
+     *
+     * @deprecated in favour of using WorldEdit methods for obtaining NBT, specifically by obtaining a
+     *         {@link com.sk89q.worldedit.world.block.BaseBlock} and then using {@link com.sk89q.worldedit.world.block.BaseBlock#getNbtData()}
+     */
+    @Deprecated(forRemoval = true, since = "TODO")
     public CompoundTag getTag() {
         if (this.tag != null) {
             return this.tag;

Core/src/main/java/com/plotsquared/core/generator/HybridGen.java

@@ -35,13 +35,23 @@ import com.plotsquared.core.plot.PlotArea;
 import com.plotsquared.core.plot.PlotId;
 import com.plotsquared.core.queue.ScopedQueueCoordinator;
 import com.plotsquared.core.util.MathMan;
+import com.sk89q.worldedit.entity.BaseEntity;
+import com.sk89q.worldedit.entity.Entity;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.math.Vector3;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import com.sk89q.worldedit.regions.RegionOperationException;
+import com.sk89q.worldedit.world.NullWorld;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockTypes;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class HybridGen extends IndependentPlotGenerator {
 
+    private static final CuboidRegion CHUNK = new CuboidRegion(BlockVector3.ZERO, BlockVector3.at(15, 396, 15));
     private final HybridPlotWorldFactory hybridPlotWorldFactory;
 
     @Inject
@@ -55,12 +65,17 @@ public class HybridGen extends IndependentPlotGenerator {
     }
 
     private void placeSchem(
-            HybridPlotWorld world, ScopedQueueCoordinator result, short relativeX,
-            short relativeZ, int x, int z, boolean isRoad
+            HybridPlotWorld world,
+            ScopedQueueCoordinator result,
+            short relativeX,
+            short relativeZ,
+            int x,
+            int z,
+            boolean isRoad,
+            boolean isPopulating
     ) {
         int minY; // Math.min(world.PLOT_HEIGHT, world.ROAD_HEIGHT);
-        if ((isRoad && Settings.Schematics.PASTE_ROAD_ON_TOP) || (!isRoad
-                && Settings.Schematics.PASTE_ON_TOP)) {
+        if ((isRoad && Settings.Schematics.PASTE_ROAD_ON_TOP) || (!isRoad && Settings.Schematics.PASTE_ON_TOP)) {
             minY = world.SCHEM_Y;
         } else {
             minY = world.getMinBuildHeight();
@@ -69,10 +84,12 @@ public class HybridGen extends IndependentPlotGenerator {
         if (blocks != null) {
             for (int y = 0; y < blocks.length; y++) {
                 if (blocks[y] != null) {
+                    if (!isPopulating || blocks[y].hasNbtData()) {
                         result.setBlock(x, minY + y, z, blocks[y]);
                     }
                 }
             }
+        }
         BiomeType biome = world.G_SCH_B.get(MathMan.pair(relativeX, relativeZ));
         if (biome != null) {
             result.setBiome(x, z, biome);
@@ -121,42 +138,38 @@ public class HybridGen extends IndependentPlotGenerator {
         short[] relativeX = new short[16];
         boolean[] insideRoadX = new boolean[16];
         boolean[] insideWallX = new boolean[16];
+        short offsetX = relativeOffsetX;
         for (short i = 0; i < 16; i++) {
-            short v = (short) (relativeOffsetX + i);
-            while (v >= hybridPlotWorld.SIZE) {
-                v -= hybridPlotWorld.SIZE;
+            if (offsetX >= hybridPlotWorld.SIZE) {
+                offsetX -= hybridPlotWorld.SIZE;
             }
-            relativeX[i] = v;
+            relativeX[i] = offsetX;
             if (hybridPlotWorld.ROAD_WIDTH != 0) {
-                insideRoadX[i] =
-                        v < hybridPlotWorld.PATH_WIDTH_LOWER || v > hybridPlotWorld.PATH_WIDTH_UPPER;
-                insideWallX[i] =
-                        v == hybridPlotWorld.PATH_WIDTH_LOWER || v == hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideRoadX[i] = offsetX < hybridPlotWorld.PATH_WIDTH_LOWER || offsetX > hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideWallX[i] = offsetX == hybridPlotWorld.PATH_WIDTH_LOWER || offsetX == hybridPlotWorld.PATH_WIDTH_UPPER;
             }
+            offsetX++;
         }
         // The Z-coordinate of a given Z coordinate, relative to the
         // plot (Counting from the corner with the least positive
         // coordinates)
         short[] relativeZ = new short[16];
-        // Whether or not the given Z coordinate belongs to the road
         boolean[] insideRoadZ = new boolean[16];
-        // Whether or not the given Z coordinate belongs to the wall
         boolean[] insideWallZ = new boolean[16];
+        short offsetZ = relativeOffsetZ;
         for (short i = 0; i < 16; i++) {
-            short v = (short) (relativeOffsetZ + i);
-            while (v >= hybridPlotWorld.SIZE) {
-                v -= hybridPlotWorld.SIZE;
+            if (offsetZ >= hybridPlotWorld.SIZE) {
+                offsetZ -= hybridPlotWorld.SIZE;
             }
-            relativeZ[i] = v;
+            relativeZ[i] = offsetZ;
             if (hybridPlotWorld.ROAD_WIDTH != 0) {
-                insideRoadZ[i] =
-                        v < hybridPlotWorld.PATH_WIDTH_LOWER || v > hybridPlotWorld.PATH_WIDTH_UPPER;
-                insideWallZ[i] =
-                        v == hybridPlotWorld.PATH_WIDTH_LOWER || v == hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideRoadZ[i] = offsetZ < hybridPlotWorld.PATH_WIDTH_LOWER || offsetZ > hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideWallZ[i] = offsetZ == hybridPlotWorld.PATH_WIDTH_LOWER || offsetZ == hybridPlotWorld.PATH_WIDTH_UPPER;
             }
+            offsetZ++;
         }
         // generation
-        int startY = hybridPlotWorld.getMinGenHeight() + (hybridPlotWorld.PLOT_BEDROCK ? 1: 0);
+        int startY = hybridPlotWorld.getMinGenHeight() + (hybridPlotWorld.PLOT_BEDROCK ? 1 : 0);
         for (short x = 0; x < 16; x++) {
             if (insideRoadX[x]) {
                 for (short z = 0; z < 16; z++) {
@@ -165,7 +178,7 @@ public class HybridGen extends IndependentPlotGenerator {
                         result.setBlock(x, y, z, hybridPlotWorld.ROAD_BLOCK.toPattern());
                     }
                     if (hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
-                        placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true);
+                        placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, false);
                     }
                 }
             } else if (insideWallX[x]) {
@@ -176,9 +189,7 @@ public class HybridGen extends IndependentPlotGenerator {
                             result.setBlock(x, y, z, hybridPlotWorld.ROAD_BLOCK.toPattern());
                         }
                         if (hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
-                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z,
-                                    true
-                            );
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, false);
                         }
                     } else {
                         // wall
@@ -187,14 +198,10 @@ public class HybridGen extends IndependentPlotGenerator {
                         }
                         if (!hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
                             if (hybridPlotWorld.PLACE_TOP_BLOCK) {
-                                result.setBlock(x, hybridPlotWorld.WALL_HEIGHT + 1, z,
-                                        hybridPlotWorld.WALL_BLOCK.toPattern()
-                                );
+                                result.setBlock(x, hybridPlotWorld.WALL_HEIGHT + 1, z, hybridPlotWorld.WALL_BLOCK.toPattern());
                             }
                         } else {
-                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z,
-                                    true
-                            );
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, false);
                         }
                     }
                 }
@@ -206,9 +213,7 @@ public class HybridGen extends IndependentPlotGenerator {
                             result.setBlock(x, y, z, hybridPlotWorld.ROAD_BLOCK.toPattern());
                         }
                         if (hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
-                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z,
-                                    true
-                            );
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, false);
                         }
                     } else if (insideWallZ[z]) {
                         // wall
@@ -217,27 +222,19 @@ public class HybridGen extends IndependentPlotGenerator {
                         }
                         if (!hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
                             if (hybridPlotWorld.PLACE_TOP_BLOCK) {
-                                result.setBlock(x, hybridPlotWorld.WALL_HEIGHT + 1, z,
-                                        hybridPlotWorld.WALL_BLOCK.toPattern()
-                                );
+                                result.setBlock(x, hybridPlotWorld.WALL_HEIGHT + 1, z, hybridPlotWorld.WALL_BLOCK.toPattern());
                             }
                         } else {
-                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z,
-                                    true
-                            );
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, false);
                         }
                     } else {
                         // plot
                         for (int y = startY; y < hybridPlotWorld.PLOT_HEIGHT; y++) {
                             result.setBlock(x, y, z, hybridPlotWorld.MAIN_BLOCK.toPattern());
                         }
-                        result.setBlock(x, hybridPlotWorld.PLOT_HEIGHT, z,
-                                hybridPlotWorld.TOP_BLOCK.toPattern()
-                        );
+                        result.setBlock(x, hybridPlotWorld.PLOT_HEIGHT, z, hybridPlotWorld.TOP_BLOCK.toPattern());
                         if (hybridPlotWorld.PLOT_SCHEMATIC) {
-                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z,
-                                    false
-                            );
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, false, false);
                         }
                     }
                 }
@@ -245,6 +242,138 @@ public class HybridGen extends IndependentPlotGenerator {
         }
     }
 
+    @Override
+    public boolean populateChunk(final ScopedQueueCoordinator result, final PlotArea settings) {
+        HybridPlotWorld hybridPlotWorld = (HybridPlotWorld) settings;
+        if (!hybridPlotWorld.populationNeeded()) {
+            return false;
+        }
+        // Coords
+        Location min = result.getMin();
+        int bx = min.getX() - hybridPlotWorld.ROAD_OFFSET_X;
+        int bz = min.getZ() - hybridPlotWorld.ROAD_OFFSET_Z;
+        // The relative X-coordinate (within the plot) of the minimum X coordinate
+        // contained in the scoped queue
+        short relativeOffsetX;
+        if (bx < 0) {
+            relativeOffsetX = (short) (hybridPlotWorld.SIZE + (bx % hybridPlotWorld.SIZE));
+        } else {
+            relativeOffsetX = (short) (bx % hybridPlotWorld.SIZE);
+        }
+        // The relative Z-coordinate (within the plot) of the minimum Z coordinate
+        // contained in the scoped queue
+        short relativeOffsetZ;
+        if (bz < 0) {
+            relativeOffsetZ = (short) (hybridPlotWorld.SIZE + (bz % hybridPlotWorld.SIZE));
+        } else {
+            relativeOffsetZ = (short) (bz % hybridPlotWorld.SIZE);
+        }
+        boolean allRoad = true;
+        boolean overlap = false;
+
+        // The X-coordinate of a given X coordinate, relative to the
+        // plot (Counting from the corner with the least positive
+        // coordinates)
+        short[] relativeX = new short[16];
+        boolean[] insideRoadX = new boolean[16];
+        boolean[] insideWallX = new boolean[16];
+        short offsetX = relativeOffsetX;
+        for (short i = 0; i < 16; i++) {
+            if (offsetX >= hybridPlotWorld.SIZE) {
+                offsetX -= hybridPlotWorld.SIZE;
+                overlap = true;
+            }
+            relativeX[i] = offsetX;
+            if (hybridPlotWorld.ROAD_WIDTH != 0) {
+                boolean insideRoad = offsetX < hybridPlotWorld.PATH_WIDTH_LOWER || offsetX > hybridPlotWorld.PATH_WIDTH_UPPER;
+                boolean insideWall = offsetX == hybridPlotWorld.PATH_WIDTH_LOWER || offsetX == hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideRoadX[i] = insideRoad;
+                insideWallX[i] = insideWall;
+                allRoad &= insideRoad && insideWall;
+            }
+            offsetX++;
+        }
+
+        // The Z-coordinate of a given Z coordinate, relative to the
+        // plot (Counting from the corner with the least positive
+        // coordinates)
+        short[] relativeZ = new short[16];
+        boolean[] insideRoadZ = new boolean[16];
+        boolean[] insideWallZ = new boolean[16];
+        short offsetZ = relativeOffsetZ;
+        for (short i = 0; i < 16; i++) {
+            if (offsetZ >= hybridPlotWorld.SIZE) {
+                offsetZ -= hybridPlotWorld.SIZE;
+                overlap = true;
+            }
+            relativeZ[i] = offsetZ;
+            if (hybridPlotWorld.ROAD_WIDTH != 0) {
+                boolean insideRoad = offsetZ < hybridPlotWorld.PATH_WIDTH_LOWER || offsetZ > hybridPlotWorld.PATH_WIDTH_UPPER;
+                boolean insideWall = offsetZ == hybridPlotWorld.PATH_WIDTH_LOWER || offsetZ == hybridPlotWorld.PATH_WIDTH_UPPER;
+                insideRoadZ[i] = insideRoad;
+                insideWallZ[i] = insideWall;
+                allRoad &= insideRoad && insideWall;
+            }
+            offsetZ++;
+        }
+        for (short x = 0; x < 16; x++) {
+            if (insideRoadX[x] || insideWallX[x]) {
+                if (hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
+                    for (short z = 0; z < 16; z++) {
+                        placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, true);
+                    }
+                }
+            } else {
+                for (short z = 0; z < 16; z++) {
+                    if (insideRoadZ[z] || insideWallZ[z]) {
+                        if (hybridPlotWorld.ROAD_SCHEMATIC_ENABLED) {
+                            placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, true, true);
+                        }
+                    } else if (hybridPlotWorld.PLOT_SCHEMATIC) {
+                        placeSchem(hybridPlotWorld, result, relativeX[x], relativeZ[z], x, z, false, true);
+                    }
+                }
+            }
+        }
+        if (!allRoad && hybridPlotWorld.getPlotSchematicEntities() != null && !hybridPlotWorld
+                .getPlotSchematicEntities()
+                .isEmpty()) {
+            CuboidRegion region = CHUNK.clone();
+            try {
+                region.shift(hybridPlotWorld
+                        .getPlotSchematicMinPoint()
+                        .add(relativeOffsetX, 0, relativeOffsetZ)
+                        .subtract(hybridPlotWorld.PATH_WIDTH_LOWER + 1, 0, hybridPlotWorld.PATH_WIDTH_LOWER + 1));
+                for (Entity entity : hybridPlotWorld.getPlotSchematicEntities()) {
+                    if (region.contains(entity.getLocation().toVector().toBlockPoint())) {
+                        Vector3 pos = (entity.getLocation().toVector()
+                                .subtract(region.getMinimumPoint().withY(hybridPlotWorld.getPlotSchematicMinPoint().getY()).toVector3()))
+                                .add(min.getBlockVector3().withY(hybridPlotWorld.SCHEM_Y).toVector3());
+                        result.setEntity(new PopulatingEntity(
+                                entity,
+                                new com.sk89q.worldedit.util.Location(NullWorld.getInstance(), pos)
+                        ));
+                    }
+                }
+            } catch (RegionOperationException e) {
+                throw new RuntimeException(e);
+            }
+            if (overlap) {
+                try {
+                    region.shift(BlockVector3.at(-hybridPlotWorld.SIZE, 0, -hybridPlotWorld.SIZE));
+                    for (Entity entity : hybridPlotWorld.getPlotSchematicEntities()) {
+                        if (region.contains(entity.getLocation().toVector().toBlockPoint())) {
+                            result.setEntity(entity);
+                        }
+                    }
+                } catch (RegionOperationException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        }
+        return true;
+    }
+
     @Override
     public PlotArea getNewPlotArea(String world, String id, PlotId min, PlotId max) {
         return this.hybridPlotWorldFactory.create(world, id, this, min, max);
@@ -255,4 +384,58 @@ public class HybridGen extends IndependentPlotGenerator {
         // All initialization is done in the PlotArea class
     }
 
+    /**
+     * Wrapper to allow a WorldEdit {@link Entity} to effectively have a mutable location as the location in its NBT should be changed
+     * when set to the world.
+     *
+     * @since TODO
+     */
+    private static final class PopulatingEntity implements Entity {
+
+        private final Entity parent;
+        private com.sk89q.worldedit.util.Location location;
+
+        /**
+         * @since TODO
+         */
+        private PopulatingEntity(Entity parent, com.sk89q.worldedit.util.Location location) {
+            this.parent = parent;
+            this.location = location;
+        }
+
+        @Nullable
+        @Override
+        public BaseEntity getState() {
+            return parent.getState();
+        }
+
+        @Override
+        public boolean remove() {
+            return parent.remove();
+        }
+
+        @Override
+        public com.sk89q.worldedit.util.Location getLocation() {
+            return location;
+        }
+
+        @Override
+        public boolean setLocation(final com.sk89q.worldedit.util.Location location) {
+            this.location = location;
+            return true;
+        }
+
+        @Override
+        public Extent getExtent() {
+            return parent.getExtent();
+        }
+
+        @Nullable
+        @Override
+        public <T> T getFacet(final Class<? extends T> cls) {
+            return parent.getFacet(cls);
+        }
+
+    }
+
 }

Core/src/main/java/com/plotsquared/core/generator/HybridPlotWorld.java

@@ -40,11 +40,13 @@ import com.plotsquared.core.plot.PlotId;
 import com.plotsquared.core.plot.PlotManager;
 import com.plotsquared.core.plot.schematic.Schematic;
 import com.plotsquared.core.queue.GlobalBlockQueue;
+import com.plotsquared.core.util.AnnotationHelper;
 import com.plotsquared.core.util.FileUtils;
 import com.plotsquared.core.util.MathMan;
 import com.plotsquared.core.util.SchematicHandler;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.CompoundTagBuilder;
+import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.extent.transform.BlockTransformExtent;
 import com.sk89q.worldedit.internal.helper.MCDirections;
@@ -58,11 +60,13 @@ import com.sk89q.worldedit.world.block.BaseBlock;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
-import javax.annotation.Nullable;
 import java.io.File;
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Locale;
 
 public class HybridPlotWorld extends ClassicPlotWorld {
@@ -71,6 +75,7 @@ public class HybridPlotWorld extends ClassicPlotWorld {
     private static final AffineTransform transform = new AffineTransform().rotateY(90);
     public boolean ROAD_SCHEMATIC_ENABLED;
     public boolean PLOT_SCHEMATIC = false;
+    @Deprecated(forRemoval = true, since = "TODO")
     public int PLOT_SCHEMATIC_HEIGHT = -1;
     public short PATH_WIDTH_LOWER;
     public short PATH_WIDTH_UPPER;
@@ -80,6 +85,11 @@ public class HybridPlotWorld extends ClassicPlotWorld {
     private Location SIGN_LOCATION;
     private File root = null;
     private int lastOverlayHeightError = Integer.MIN_VALUE;
+    private List<Entity> schem3Entities = null;
+    private BlockVector3 schem3MinPoint = null;
+    private boolean schem1PopulationNeeded = false;
+    private boolean schem2PopulationNeeded = false;
+    private boolean schem3PopulationNeeded = false;
 
     @Inject
     private SchematicHandler schematicHandler;
@@ -98,6 +108,7 @@ public class HybridPlotWorld extends ClassicPlotWorld {
         PlotSquared.platform().injector().injectMembers(this);
     }
 
+    @Deprecated(forRemoval = true, since = "TODO")
     public static byte wrap(byte data, int start) {
         if ((data >= start) && (data < (start + 4))) {
             data = (byte) ((((data - start) + 2) & 3) + start);
@@ -105,6 +116,7 @@ public class HybridPlotWorld extends ClassicPlotWorld {
         return data;
     }
 
+    @Deprecated(forRemoval = true, since = "TODO")
     public static byte wrap2(byte data, int start) {
         if ((data >= start) && (data < (start + 2))) {
             data = (byte) ((((data - start) + 1) & 1) + start);
@@ -112,8 +124,6 @@ public class HybridPlotWorld extends ClassicPlotWorld {
         return data;
     }
 
-    // FIXME depends on block ids
-    // Possibly make abstract?
     public static BaseBlock rotate(BaseBlock id) {
 
         CompoundTag tag = id.getNbtData();
@@ -251,6 +261,14 @@ public class HybridPlotWorld extends ClassicPlotWorld {
         Schematic schematic1 = this.schematicHandler.getSchematic(schematic1File);
         Schematic schematic2 = this.schematicHandler.getSchematic(schematic2File);
         Schematic schematic3 = this.schematicHandler.getSchematic(schematic3File);
+
+        // If the plot schematic contains entities, then they need to be populated upon generation.
+        if (schematic3 != null && !schematic3.getClipboard().getEntities().isEmpty()) {
+            this.schem3Entities = new ArrayList<>(schematic3.getClipboard().getEntities());
+            this.schem3MinPoint = schematic3.getClipboard().getMinimumPoint();
+            this.schem3PopulationNeeded = true;
+        }
+
         int shift = this.ROAD_WIDTH / 2;
         int oddshift = (this.ROAD_WIDTH & 1);
 
@@ -314,19 +332,28 @@ public class HybridPlotWorld extends ClassicPlotWorld {
             for (short x = 0; x < w3; x++) {
                 for (short z = 0; z < l3; z++) {
                     for (short y = 0; y < h3; y++) {
-                        BaseBlock id =
-                                blockArrayClipboard3.getFullBlock(BlockVector3.at(
+                        BaseBlock id = blockArrayClipboard3.getFullBlock(BlockVector3.at(
                                 x + min.getBlockX(),
                                 y + min.getBlockY(),
                                 z + min.getBlockZ()
                         ));
                         if (!id.getBlockType().getMaterial().isAir()) {
-                            addOverlayBlock((short) (x + shift + oddshift + centerShiftX), (short) (y + plotY),
-                                    (short) (z + shift + oddshift + centerShiftZ), id, false, h3
+                            schem3PopulationNeeded |= id.hasNbtData();
+                            addOverlayBlock(
+                                    (short) (x + shift + oddshift + centerShiftX),
+                                    (short) (y + plotY),
+                                    (short) (z + shift + oddshift + centerShiftZ),
+                                    id,
+                                    false,
+                                    h3
                             );
                         }
                     }
-                    BiomeType biome = blockArrayClipboard3.getBiome(BlockVector2.at(x + min.getBlockX(), z + min.getBlockZ()));
+                    if (blockArrayClipboard3.hasBiomes()) {
+                        BiomeType biome = blockArrayClipboard3.getBiome(BlockVector2.at(
+                                x + min.getBlockX(),
+                                z + min.getBlockZ()
+                        ));
                         addOverlayBiome(
                                 (short) (x + shift + oddshift + centerShiftX),
                                 (short) (z + shift + oddshift + centerShiftZ),
@@ -334,12 +361,13 @@ public class HybridPlotWorld extends ClassicPlotWorld {
                         );
                     }
                 }
+            }
 
             if (Settings.DEBUG) {
                 LOGGER.info("- plot schematic: {}", schematic3File.getPath());
             }
         }
-        if ((schematic1 == null&& schematic2 == null) || this.ROAD_WIDTH == 0) {
+        if ((schematic1 == null && schematic2 == null) || this.ROAD_WIDTH == 0) {
             if (Settings.DEBUG) {
                 LOGGER.info("- schematic: false");
             }
@@ -370,6 +398,7 @@ public class HybridPlotWorld extends ClassicPlotWorld {
                             z + min.getBlockZ()
                     ));
                     if (!id.getBlockType().getMaterial().isAir()) {
+                        schem1PopulationNeeded |= id.hasNbtData();
                         addOverlayBlock((short) (x - shift), (short) (y + roadY), (short) (z + shift + oddshift), id, false, h1);
                         addOverlayBlock(
                                 (short) (z + shift + oddshift),
@@ -381,11 +410,13 @@ public class HybridPlotWorld extends ClassicPlotWorld {
                         );
                     }
                 }
+                if (blockArrayClipboard1.hasBiomes()) {
                     BiomeType biome = blockArrayClipboard1.getBiome(BlockVector2.at(x + min.getBlockX(), z + min.getBlockZ()));
                     addOverlayBiome((short) (x - shift), (short) (z + shift + oddshift), biome);
                     addOverlayBiome((short) (z + shift + oddshift), (short) (shift - x + (oddshift - 1)), biome);
                 }
             }
+        }
 
         Clipboard blockArrayClipboard2 = schematic2.getClipboard();
         BlockVector3 d2 = blockArrayClipboard2.getDimensions();
@@ -406,14 +437,17 @@ public class HybridPlotWorld extends ClassicPlotWorld {
                             z + min.getBlockZ()
                     ));
                     if (!id.getBlockType().getMaterial().isAir()) {
+                        schem2PopulationNeeded |= id.hasNbtData();
                         addOverlayBlock((short) (x - shift), (short) (y + roadY), (short) (z - shift), id, false, h2);
                     }
                 }
+                if (blockArrayClipboard2.hasBiomes()) {
                     BiomeType biome = blockArrayClipboard2.getBiome(BlockVector2.at(x + min.getBlockX(), z + min.getBlockZ()));
                     addOverlayBiome((short) (x - shift), (short) (z - shift), biome);
                 }
             }
         }
+    }
 
     public void addOverlayBlock(short x, short y, short z, BaseBlock id, boolean rotate, int height) {
         if (z < 0) {
@@ -456,8 +490,52 @@ public class HybridPlotWorld extends ClassicPlotWorld {
         this.G_SCH_B.put(pair, id);
     }
 
+    /**
+     * Get the entities contained within the plot schematic for generation. Intended for internal use only.
+     *
+     * @since TODO
+     */
+    @AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+    public @Nullable List<Entity> getPlotSchematicEntities() {
+        return schem3Entities;
+    }
+
+    /**
+     * Get the minimum point of the plot schematic for generation. Intended for internal use only.
+     *
+     * @since TODO
+     */
+    @AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+    public @Nullable BlockVector3 getPlotSchematicMinPoint() {
+        return schem3MinPoint;
+    }
+
+    /**
+     * Get if post-generation population of chunks with tiles/entities is needed for this world. Not for public API use.
+     *
+     * @since TODO
+     */
+    @AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+    public boolean populationNeeded() {
+        return schem1PopulationNeeded || schem2PopulationNeeded || schem3PopulationNeeded;
+    }
+
+    /**
+     * @deprecated in favour of {@link HybridPlotWorld#getSchematicRoot()}
+     */
+    @Deprecated(forRemoval = true, since = "TODO")
     public File getRoot() {
         return this.root;
     }
 
+    /**
+     * Get the root folder for this world's generation schematics. May be null if schematics not initialised via
+     * {@link HybridPlotWorld#setupSchematics()}
+     *
+     * @since TODO
+     */
+    public @Nullable File getSchematicRoot() {
+        return this.root;
+    }
+
 }

Core/src/main/java/com/plotsquared/core/generator/IndependentPlotGenerator.java

@@ -47,9 +47,7 @@ public abstract class IndependentPlotGenerator {
     public abstract String getName();
 
     /**
-     * Use the setBlock or setBiome method of the PlotChunk result parameter to make changes.
-     * The PlotArea settings is the same one this was initialized with.
-     * The PseudoRandom random is a fast random object.
+     * Generate chunk block data
      *
      * @param result   queue
      * @param settings PlotArea (settings)
@@ -59,10 +57,15 @@ public abstract class IndependentPlotGenerator {
     public abstract void generateChunk(ScopedQueueCoordinator result, PlotArea settings);
 
     /**
+     * Populates the queue representing a chunk area with tile entities and entities
+     *
+     * @param result   Queue to write to
+     * @param settings PlotArea (settings)
+     * @return True if any population occurred
      * @deprecated {@link ScopedQueueCoordinator} will be renamed in v7.
      */
     @Deprecated(forRemoval = true, since = "TODO")
-    public boolean populateChunk(ScopedQueueCoordinator result, PlotArea setting) {
+    public boolean populateChunk(ScopedQueueCoordinator result, PlotArea settings) {
         return false;
     }
 

Core/src/main/java/com/plotsquared/core/location/Location.java

@@ -41,14 +41,17 @@ import org.khelekore.prtree.SimpleMBR;
  * An unmodifiable 6-tuple (world,x,y,z,yaw,pitch)
  */
 @SuppressWarnings("unused")
-public final class Location extends BlockLoc implements Comparable<Location> {
+public sealed class Location extends BlockLoc implements Comparable<Location> permits UncheckedWorldLocation {
 
     private final float yaw;
     private final float pitch;
     private final BlockVector3 blockVector3;
     private final World<?> world;
 
-    private Location(
+    /**
+     * @since TODO
+     */
+    protected Location(
             final @NonNull World<?> world, final @NonNull BlockVector3 blockVector3,
             final float yaw, final float pitch
     ) {

Core/src/main/java/com/plotsquared/core/location/UncheckedWorldLocation.java

@@ -0,0 +1,77 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *               Copyright (C) 2014 - 2022 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.location;
+
+import com.plotsquared.core.util.AnnotationHelper;
+import com.sk89q.worldedit.math.BlockVector3;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+/**
+ * Used internally for generation to reference locations in worlds that "don't exist yet". There is no guarantee that the world
+ * name provided by {@link UncheckedWorldLocation#getWorldName()} exists on the server.
+ *
+ * @since TODO
+ */
+@AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+public final class UncheckedWorldLocation extends Location {
+
+    private final String worldName;
+
+    /**
+     * @since TODO
+     */
+    private UncheckedWorldLocation(
+            final @NonNull String worldName, final int x, final int y, final int z
+    ) {
+        super(World.nullWorld(), BlockVector3.at(x, y, z), 0f, 0f);
+        this.worldName = worldName;
+    }
+
+    /**
+     * Construct a new location with yaw and pitch equal to 0
+     *
+     * @param world World
+     * @param x     X coordinate
+     * @param y     Y coordinate
+     * @param z     Z coordinate
+     * @return New location
+     *
+     * @since TODO
+     */
+    @AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+    public static @NonNull UncheckedWorldLocation at(
+            final @NonNull String world, final int x, final int y, final int z
+    ) {
+        return new UncheckedWorldLocation(world, x, y, z);
+    }
+
+    @Override
+    @AnnotationHelper.ApiDescription(info = "Internal use only. Subject to changes at any time.")
+    public @NonNull String getWorldName() {
+        return this.worldName;
+    }
+
+}