fix: compile against 1.20.4

Bukkit/build.gradle.kts

@@ -41,6 +41,7 @@ dependencies {
     compileOnly(libs.luckperms)
     compileOnly(libs.essentialsx) {
         exclude(group = "org.spigotmc")
+        exclude(group = "io.papermc.paper")
     }
     compileOnly(libs.mvdwapi) { isTransitive = false }
 
@@ -74,7 +75,7 @@ tasks.named<ShadowJar>("shadowJar") {
     relocate("net.kyori.examination", "com.plotsquared.core.configuration.examination")
     relocate("io.papermc.lib", "com.plotsquared.bukkit.paperlib")
     relocate("org.bstats", "com.plotsquared.metrics")
-    relocate("org.enginehub", "com.plotsquared.squirrelid")
+    relocate("org.enginehub.squirrelid", "com.plotsquared.squirrelid")
     relocate("org.khelekore.prtree", "com.plotsquared.prtree")
     relocate("com.google.inject", "com.plotsquared.google")
     relocate("org.aopalliance", "com.plotsquared.core.aopalliance")

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

@@ -90,12 +90,7 @@ public class BukkitPlotGenerator extends ChunkGenerator implements GeneratorWrap
         this.plotGenerator = generator;
         this.platformGenerator = this;
         this.populators = new ArrayList<>();
-        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;
         this.useNewGenerationMethods = PlotSquared.platform().serverVersion()[1] >= 19;
         this.biomeProvider = new BukkitPlotBiomeProvider();

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

@@ -36,6 +36,7 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.util.Random;
 
+@Deprecated(since = "TODO")
 final class LegacyBlockStatePopulator extends BlockPopulator {
 
     private final IndependentPlotGenerator plotGenerator;

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

@@ -0,0 +1,80 @@
+/*
+ * PlotSquared, a land and world management plugin for Minecraft.
+ * Copyright (C) IntellectualSites <https://intellectualsites.com>
+ * Copyright (C) IntellectualSites team and contributors
+ *
+ * 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.schematic;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import com.sk89q.jnbt.ByteArrayTag;
+import com.sk89q.jnbt.CompoundTag;
+import com.sk89q.jnbt.IntArrayTag;
+import com.sk89q.jnbt.ListTag;
+import com.sk89q.jnbt.LongArrayTag;
+import com.sk89q.jnbt.Tag;
+
+import java.lang.reflect.Type;
+
+final class NbtGsonSerializer implements JsonSerializer<Tag> {
+
+    @Override
+    public JsonElement serialize(final Tag src, final Type typeOfSrc, final JsonSerializationContext context) {
+        if (src instanceof CompoundTag compoundTag) {
+            JsonObject object = new JsonObject();
+            compoundTag.getValue().forEach((s, tag) -> object.add(s, context.serialize(tag)));
+            return object;
+        }
+        if (src instanceof ListTag listTag) {
+            JsonArray array = new JsonArray();
+            listTag.getValue().forEach(tag -> array.add(context.serialize(tag)));
+            return array;
+        }
+        if (src instanceof ByteArrayTag byteArrayTag) {
+            JsonArray array = new JsonArray();
+            for (final byte b : byteArrayTag.getValue()) {
+                array.add(b);
+            }
+            return array;
+        }
+        if (src instanceof IntArrayTag intArrayTag) {
+            JsonArray array = new JsonArray();
+            for (final int i : intArrayTag.getValue()) {
+                array.add(i);
+            }
+            return array;
+        }
+        if (src instanceof LongArrayTag longArrayTag) {
+            JsonArray array = new JsonArray();
+            for (final long l : longArrayTag.getValue()) {
+                array.add(l);
+            }
+            return array;
+        }
+        if (src.getValue() instanceof Number number) {
+            return new JsonPrimitive(number);
+        }
+        if (src.getValue() instanceof String string) {
+            return new JsonPrimitive(string);
+        }
+        throw new IllegalArgumentException("Don't know how to serialize " + src);
+    }
+
+}

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

@@ -18,158 +18,93 @@
  */
 package com.plotsquared.bukkit.schematic;
 
-import com.destroystokyo.paper.profile.PlayerProfile;
-import com.destroystokyo.paper.profile.ProfileProperty;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
 import com.plotsquared.bukkit.util.BukkitUtil;
-import com.sk89q.jnbt.ByteTag;
+import com.plotsquared.core.PlotSquared;
+import com.plotsquared.core.util.ReflectionUtils;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.ListTag;
-import com.sk89q.jnbt.ShortTag;
 import com.sk89q.jnbt.StringTag;
 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 com.sk89q.worldedit.bukkit.WorldEditPlugin;
+import com.sk89q.worldedit.bukkit.adapter.BukkitImplAdapter;
+import com.sk89q.worldedit.extension.platform.NoCapablePlatformException;
 import io.papermc.lib.PaperLib;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.bukkit.Bukkit;
-import org.bukkit.ChatColor;
 import org.bukkit.DyeColor;
 import org.bukkit.World;
-import org.bukkit.block.Banner;
 import org.bukkit.block.Block;
-import org.bukkit.block.Container;
+import org.bukkit.block.BlockState;
 import org.bukkit.block.Sign;
-import org.bukkit.block.Skull;
-import org.bukkit.block.banner.Pattern;
-import org.bukkit.block.banner.PatternType;
-import org.bukkit.enchantments.Enchantment;
-import org.bukkit.inventory.Inventory;
-import org.bukkit.inventory.ItemStack;
+import org.bukkit.block.sign.Side;
+import org.bukkit.block.sign.SignSide;
 import org.checkerframework.checker.nullness.qual.NonNull;
+import org.jetbrains.annotations.ApiStatus;
 
-import java.util.ArrayList;
-import java.util.HashMap;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.util.Arrays;
 import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Objects;
-import java.util.UUID;
+import java.util.Locale;
+import java.util.function.Consumer;
 
+/**
+ * This class (attempts to) restore block tile entity data, after the underlying block state has been placed.
+ * This is used on chunk population (world generation) and in the platforms queue handler (as a fallback for WorldEdit placement).
+ * <br />
+ * This class relies heavily on reflective access, native minecraft methods and non-standardized WorldEdit / FAWE methods. It's
+ * extremely prone to breakage between versions (Minecraft and/or (FA)WE), but supports most if not all possible tile entities.
+ * Given the previous logic of this class was also non-reliable between version updates, and did only support a small subset of
+ * tile entities, it's a fair trade-off.
+ */
+@ApiStatus.Internal
 public class StateWrapper {
 
+    private static final Logger LOGGER = LogManager.getLogger("PlotSquared/" + StateWrapper.class.getSimpleName());
+
+    private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
+    private static final Gson GSON = new GsonBuilder().registerTypeHierarchyAdapter(Tag.class, new NbtGsonSerializer()).create();
+    private static final String CRAFTBUKKIT_PACKAGE = Bukkit.getServer().getClass().getPackageName();
+
+    private static final boolean FORCE_UPDATE_STATE = true;
+    private static final boolean UPDATE_TRIGGER_PHYSICS = false;
+    private static final boolean SUPPORTED = PlotSquared.platform().serverVersion()[1] > 20 ||
+            (PlotSquared.platform().serverVersion()[1] == 20 && PlotSquared.platform().serverVersion()[2] >= 4);
+    private static final String INITIALIZATION_ERROR_TEMPLATE = """
+            Failed to initialize StateWrapper: {}
+            Block-/Tile-Entities, pasted by schematics for example, won't be updated with their respective block data. This affects things like sign text, banner patterns, skulls, etc.
+            Try updating your Server Software, PlotSquared and WorldEdit / FastAsyncWorldEdit first. If the issue persists, report it on the issue tracker.
+            """;
+
+    private static boolean NOT_SUPPORTED_NOTIFIED = false;
+    private static boolean FAILED_INITIALIZATION = false;
+    private static BukkitImplAdapter ADAPTER = null;
+    private static Class<?> LIN_TAG_CLASS = null;
+    private static Class<?> JNBT_TAG_CLASS = null;
+    private static Class<?> CRAFT_BLOCK_ENTITY_STATE_CLASS = null;
+    private static MethodHandle PAPERWEIGHT_ADAPTER_FROM_NATIVE = null;
+    private static MethodHandle CRAFT_BLOCK_ENTITY_STATE_LOAD_DATA = null;
+    private static MethodHandle CRAFT_BLOCK_ENTITY_STATE_UPDATE = null;
+    private static MethodHandle TO_LIN_TAG = null;
+
+    // SIGN HACK
+    private static boolean PAPER_SIGN_NOTIFIED = false;
+    private static boolean FAILED_SIGN_INITIALIZATION = false;
+    private static Object KYORI_GSON_SERIALIZER = null;
+    private static MethodHandle GSON_SERIALIZER_DESERIALIZE_TREE = null;
+    private static MethodHandle BUKKIT_SIGN_SIDE_LINE_SET = null;
+
     public CompoundTag tag;
 
-    private boolean paperErrorTextureSent = false;
-    private static final Logger LOGGER = LogManager.getLogger("PlotSquared/" + StateWrapper.class.getSimpleName());
-
     public StateWrapper(CompoundTag tag) {
         this.tag = tag;
     }
 
-    public static String jsonToColourCode(String str) {
-        str = str.replace("{\"extra\":", "").replace("],\"text\":\"\"}", "]")
-                .replace("[{\"color\":\"black\",\"text\":\"", "&0")
-                .replace("[{\"color\":\"dark_blue\",\"text\":\"", "&1")
-                .replace("[{\"color\":\"dark_green\",\"text\":\"", "&2")
-                .replace("[{\"color\":\"dark_aqua\",\"text\":\"", "&3")
-                .replace("[{\"color\":\"dark_red\",\"text\":\"", "&4")
-                .replace("[{\"color\":\"dark_purple\",\"text\":\"", "&5")
-                .replace("[{\"color\":\"gold\",\"text\":\"", "&6")
-                .replace("[{\"color\":\"gray\",\"text\":\"", "&7")
-                .replace("[{\"color\":\"dark_gray\",\"text\":\"", "&8")
-                .replace("[{\"color\":\"blue\",\"text\":\"", "&9")
-                .replace("[{\"color\":\"green\",\"text\":\"", "&a")
-                .replace("[{\"color\":\"aqua\",\"text\":\"", "&b")
-                .replace("[{\"color\":\"red\",\"text\":\"", "&c")
-                .replace("[{\"color\":\"light_purple\",\"text\":\"", "&d")
-                .replace("[{\"color\":\"yellow\",\"text\":\"", "&e")
-                .replace("[{\"color\":\"white\",\"text\":\"", "&f")
-                .replace("[{\"obfuscated\":true,\"text\":\"", "&k")
-                .replace("[{\"bold\":true,\"text\":\"", "&l")
-                .replace("[{\"strikethrough\":true,\"text\":\"", "&m")
-                .replace("[{\"underlined\":true,\"text\":\"", "&n")
-                .replace("[{\"italic\":true,\"text\":\"", "&o").replace("[{\"color\":\"black\",", "&0")
-                .replace("[{\"color\":\"dark_blue\",", "&1")
-                .replace("[{\"color\":\"dark_green\",", "&2")
-                .replace("[{\"color\":\"dark_aqua\",", "&3").replace("[{\"color\":\"dark_red\",", "&4")
-                .replace("[{\"color\":\"dark_purple\",", "&5").replace("[{\"color\":\"gold\",", "&6")
-                .replace("[{\"color\":\"gray\",", "&7").replace("[{\"color\":\"dark_gray\",", "&8")
-                .replace("[{\"color\":\"blue\",", "&9").replace("[{\"color\":\"green\",", "&a")
-                .replace("[{\"color\":\"aqua\",", "&b").replace("[{\"color\":\"red\",", "&c")
-                .replace("[{\"color\":\"light_purple\",", "&d").replace("[{\"color\":\"yellow\",", "&e")
-                .replace("[{\"color\":\"white\",", "&f").replace("[{\"obfuscated\":true,", "&k")
-                .replace("[{\"bold\":true,", "&l").replace("[{\"strikethrough\":true,", "&m")
-                .replace("[{\"underlined\":true,", "&n").replace("[{\"italic\":true,", "&o")
-                .replace("{\"color\":\"black\",\"text\":\"", "&0")
-                .replace("{\"color\":\"dark_blue\",\"text\":\"", "&1")
-                .replace("{\"color\":\"dark_green\",\"text\":\"", "&2")
-                .replace("{\"color\":\"dark_aqua\",\"text\":\"", "&3")
-                .replace("{\"color\":\"dark_red\",\"text\":\"", "&4")
-                .replace("{\"color\":\"dark_purple\",\"text\":\"", "&5")
-                .replace("{\"color\":\"gold\",\"text\":\"", "&6")
-                .replace("{\"color\":\"gray\",\"text\":\"", "&7")
-                .replace("{\"color\":\"dark_gray\",\"text\":\"", "&8")
-                .replace("{\"color\":\"blue\",\"text\":\"", "&9")
-                .replace("{\"color\":\"green\",\"text\":\"", "&a")
-                .replace("{\"color\":\"aqua\",\"text\":\"", "&b")
-                .replace("{\"color\":\"red\",\"text\":\"", "&c")
-                .replace("{\"color\":\"light_purple\",\"text\":\"", "&d")
-                .replace("{\"color\":\"yellow\",\"text\":\"", "&e")
-                .replace("{\"color\":\"white\",\"text\":\"", "&f")
-                .replace("{\"obfuscated\":true,\"text\":\"", "&k")
-                .replace("{\"bold\":true,\"text\":\"", "&l")
-                .replace("{\"strikethrough\":true,\"text\":\"", "&m")
-                .replace("{\"underlined\":true,\"text\":\"", "&n")
-                .replace("{\"italic\":true,\"text\":\"", "&o").replace("{\"color\":\"black\",", "&0")
-                .replace("{\"color\":\"dark_blue\",", "&1").replace("{\"color\":\"dark_green\",", "&2")
-                .replace("{\"color\":\"dark_aqua\",", "&3").replace("{\"color\":\"dark_red\",", "&4")
-                .replace("{\"color\":\"dark_purple\",", "&5").replace("{\"color\":\"gold\",", "&6")
-                .replace("{\"color\":\"gray\",", "&7").replace("{\"color\":\"dark_gray\",", "&8")
-                .replace("{\"color\":\"blue\",", "&9").replace("{\"color\":\"green\",", "&a")
-                .replace("{\"color\":\"aqua\",", "&b").replace("{\"color\":\"red\",", "&c")
-                .replace("{\"color\":\"light_purple\",", "&d").replace("{\"color\":\"yellow\",", "&e")
-                .replace("{\"color\":\"white\",", "&f").replace("{\"obfuscated\":true,", "&k")
-                .replace("{\"bold\":true,", "&l").replace("{\"strikethrough\":true,", "&m")
-                .replace("{\"underlined\":true,", "&n").replace("{\"italic\":true,", "&o")
-                .replace("\"color\":\"black\",\"text\":\"", "&0")
-                .replace("\"color\":\"dark_blue\",\"text\":\"", "&1")
-                .replace("\"color\":\"dark_green\",\"text\":\"", "&2")
-                .replace("\"color\":\"dark_aqua\",\"text\":\"", "&3")
-                .replace("\"color\":\"dark_red\",\"text\":\"", "&4")
-                .replace("\"color\":\"dark_purple\",\"text\":\"", "&5")
-                .replace("\"color\":\"gold\",\"text\":\"", "&6")
-                .replace("\"color\":\"gray\",\"text\":\"", "&7")
-                .replace("\"color\":\"dark_gray\",\"text\":\"", "&8")
-                .replace("\"color\":\"blue\",\"text\":\"", "&9")
-                .replace("\"color\":\"green\",\"text\":\"", "&a")
-                .replace("\"color\":\"aqua\",\"text\":\"", "&b")
-                .replace("\"color\":\"red\",\"text\":\"", "&c")
-                .replace("\"color\":\"light_purple\",\"text\":\"", "&d")
-                .replace("\"color\":\"yellow\",\"text\":\"", "&e")
-                .replace("\"color\":\"white\",\"text\":\"", "&f")
-                .replace("\"obfuscated\":true,\"text\":\"", "&k")
-                .replace("\"bold\":true,\"text\":\"", "&l")
-                .replace("\"strikethrough\":true,\"text\":\"", "&m")
-                .replace("\"underlined\":true,\"text\":\"", "&n")
-                .replace("\"italic\":true,\"text\":\"", "&o").replace("\"color\":\"black\",", "&0")
-                .replace("\"color\":\"dark_blue\",", "&1").replace("\"color\":\"dark_green\",", "&2")
-                .replace("\"color\":\"dark_aqua\",", "&3").replace("\"color\":\"dark_red\",", "&4")
-                .replace("\"color\":\"dark_purple\",", "&5").replace("\"color\":\"gold\",", "&6")
-                .replace("\"color\":\"gray\",", "&7").replace("\"color\":\"dark_gray\",", "&8")
-                .replace("\"color\":\"blue\",", "&9").replace("\"color\":\"green\",", "&a")
-                .replace("\"color\":\"aqua\",", "&b").replace("\"color\":\"red\",", "&c")
-                .replace("\"color\":\"light_purple\",", "&d").replace("\"color\":\"yellow\",", "&e")
-                .replace("\"color\":\"white\",", "&f").replace("\"obfuscated\":true,", "&k")
-                .replace("\"bold\":true,", "&l").replace("\"strikethrough\":true,", "&m")
-                .replace("\"underlined\":true,", "&n").replace("\"italic\":true,", "&o")
-                .replace("[{\"text\":\"", "&0").replace("{\"text\":\"", "&0").replace("\"},", "")
-                .replace("\"}]", "").replace("\"}", "");
-        str = ChatColor.translateAlternateColorCodes('&', str);
-        return str;
-    }
-
     /**
      * Restore the TileEntity data to the given world at the given coordinates.
      *
@@ -193,157 +128,264 @@ public class StateWrapper {
      * @param block Block to restore to
      * @return true if successful
      */
-    @SuppressWarnings("deprecation") // #setLine is needed for Spigot compatibility
     public boolean restoreTag(@NonNull Block block) {
-        if (this.tag == null) {
+        if (this.tag == null || FAILED_INITIALIZATION) {
             return false;
         }
-        org.bukkit.block.BlockState state = block.getState();
-        switch (getId()) {
-            case "chest", "beacon", "brewingstand", "dispenser", "dropper", "furnace", "hopper", "shulkerbox" -> {
-                if (!(state instanceof Container container)) {
+        if (!SUPPORTED) {
+            if (!NOT_SUPPORTED_NOTIFIED) {
+                NOT_SUPPORTED_NOTIFIED = true;
+                LOGGER.error(INITIALIZATION_ERROR_TEMPLATE, "Your server version is not supported. 1.20.4 or later is required");
+            }
             return false;
         }
-                List<Tag> itemsTag = this.tag.getListTag("Items").getValue();
-                Inventory inv = container.getSnapshotInventory();
-                for (Tag itemTag : itemsTag) {
-                    CompoundTag itemComp = (CompoundTag) itemTag;
-                    ItemType type = ItemType.REGISTRY.get(itemComp.getString("id").toLowerCase());
-                    if (type == null) {
+        if (ADAPTER == null) {
+            try {
+                findNbtCompoundClassType(clazz -> LIN_TAG_CLASS = clazz, clazz -> JNBT_TAG_CLASS = clazz);
+                ReflectionUtils.RefClass worldEditPluginRefClass = ReflectionUtils.getRefClass(WorldEditPlugin.class);
+                WorldEditPlugin worldEditPlugin = (WorldEditPlugin) worldEditPluginRefClass
+                        .getMethod("getInstance")
+                        .of(null)
+                        .call();
+                ADAPTER = (BukkitImplAdapter) worldEditPluginRefClass
+                        .getMethod("getBukkitImplAdapter")
+                        .of(worldEditPlugin)
+                        .call();
+                PAPERWEIGHT_ADAPTER_FROM_NATIVE = findPaperweightAdapterFromNativeMethodHandle(
+                        ADAPTER.getClass(), LIN_TAG_CLASS, JNBT_TAG_CLASS
+                );
+                TO_LIN_TAG = findToLinTagMethodHandle(LIN_TAG_CLASS);
+            } catch (NoSuchMethodException | ClassNotFoundException | IllegalAccessException | NoCapablePlatformException e) {
+                LOGGER.error(INITIALIZATION_ERROR_TEMPLATE, "Failed to access required WorldEdit methods", e);
+                FAILED_INITIALIZATION = true;
+                return false;
+            }
+            try {
+                CRAFT_BLOCK_ENTITY_STATE_CLASS = Class.forName(CRAFTBUKKIT_PACKAGE + ".block.CraftBlockEntityState");
+                CRAFT_BLOCK_ENTITY_STATE_LOAD_DATA = findCraftBlockEntityStateLoadDataMethodHandle(CRAFT_BLOCK_ENTITY_STATE_CLASS);
+                CRAFT_BLOCK_ENTITY_STATE_UPDATE = findCraftBlockEntityStateUpdateMethodHandle(CRAFT_BLOCK_ENTITY_STATE_CLASS);
+            } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException e) {
+                LOGGER.error(INITIALIZATION_ERROR_TEMPLATE, "Failed to initialize required native method accessors", e);
+                FAILED_INITIALIZATION = true;
+                return false;
+            }
+        }
+        try {
+            final BlockState blockState = block.getState();
+            if (!CRAFT_BLOCK_ENTITY_STATE_CLASS.isAssignableFrom(blockState.getClass())) {
+                return false;
+            }
+            // get native tag
+            Object nativeTag = PAPERWEIGHT_ADAPTER_FROM_NATIVE.invoke(
+                    ADAPTER,
+                    LIN_TAG_CLASS == null ? this.tag : TO_LIN_TAG.invoke(this.tag)
+            );
+            CRAFT_BLOCK_ENTITY_STATE_LOAD_DATA.invoke(blockState, nativeTag);
+            if (blockState instanceof Sign sign) {
+                Object text;
+                if ((text = tag.getValue().get("front_text")) != null && text instanceof CompoundTag textTag) {
+                    setSignTextHack(sign, textTag, true);
+                }
+                if ((text = tag.getValue().get("back_text")) != null && text instanceof CompoundTag textTag) {
+                    setSignTextHack(sign, textTag, false);
+                }
+            }
+            CRAFT_BLOCK_ENTITY_STATE_UPDATE.invoke(blockState, FORCE_UPDATE_STATE, UPDATE_TRIGGER_PHYSICS);
+        } catch (Throwable e) {
+            LOGGER.error("Failed to update tile entity", e);
+        }
+        return false;
+    }
+
+    /**
+     * Set sign content on the bukkit tile entity. The server does not load sign content applied via the main logic
+     * (CraftBlockEntity#load), as the SignEntity needs to have a valid ServerLevel assigned to it.
+     * That's not possible on worldgen; therefore, this hack has to be used additionally.
+     * <br />
+     * Modern sign content (non-plain-text sign lines) require Paper.
+     *
+     * @param sign  The sign to apply data onto.
+     * @param text  The compound tag containing the data for the sign side ({@code front_text} / {@code back_text})
+     * @param front If the compound tag contains the data for the front side.
+     * @throws Throwable if something went wrong when reflectively updating the sign.
+     */
+    private static void setSignTextHack(Sign sign, CompoundTag text, boolean front) throws Throwable {
+        final SignSide side = sign.getSide(front ? Side.FRONT : Side.BACK);
+        if (text.containsKey("color")) {
+            //noinspection UnstableApiUsage
+            side.setColor(DyeColor.legacyValueOf(text.getString("color").toUpperCase(Locale.ROOT)));
+        }
+        if (text.containsKey("has_glowing_text")) {
+            side.setGlowingText(text.getByte("has_glowing_text") == 1);
+        }
+        List<Tag> lines = text.getList("messages");
+        if (lines != null) {
+            for (int i = 0; i < Math.min(lines.size(), 3); i++) {
+                Tag line = lines.get(i);
+                if (line instanceof StringTag stringTag) {
+                    //noinspection deprecation - Paper deprecatiom
+                    side.setLine(i, stringTag.getValue());
                     continue;
                 }
-                    int count = itemComp.getByte("Count");
-                    int slot = itemComp.getByte("Slot");
-                    CompoundTag tag = (CompoundTag) itemComp.getValue().get("tag");
-                    BaseItemStack baseItemStack = new BaseItemStack(type, tag, count);
-                    ItemStack itemStack = BukkitAdapter.adapt(baseItemStack);
-                    inv.setItem(slot, itemStack);
+                if (line instanceof ListTag || line instanceof CompoundTag) {
+                    if (!initializeSignHack()) {
+                        continue;
                     }
-                container.update(true, false);
-                return true;
+                    // Minecraft uses mixed lists / arrays in their sign texts. One line can be a complex component, whereas
+                    // the following line could simply be a string. Those simpler lines are represented as `{"": ""}` (only in
+                    // SNBT those will be shown as a standard string). Adventure can't parse those, so we handle these lines as
+                    // plaintext lines (can't contain any other extra data either way).
+                    if (line instanceof CompoundTag compoundTag && compoundTag.getValue().containsKey("")) {
+                        //noinspection deprecation - Paper deprecatiom
+                        side.setLine(i, compoundTag.getString(""));
+                        continue;
                     }
-            case "sign" -> {
-                if (state instanceof Sign sign) {
-                    sign.setLine(0, jsonToColourCode(tag.getString("Text1")));
-                    sign.setLine(1, jsonToColourCode(tag.getString("Text2")));
-                    sign.setLine(2, jsonToColourCode(tag.getString("Text3")));
-                    sign.setLine(3, jsonToColourCode(tag.getString("Text4")));
-                    state.update(true);
-                    return true;
+                    // serializes the line content from JNBT to Gson JSON objects, passes that to adventure and deserializes
+                    // into an adventure component.
+                    BUKKIT_SIGN_SIDE_LINE_SET.invoke(
+                            side, i, GSON_SERIALIZER_DESERIALIZE_TREE.invoke(
+                                    KYORI_GSON_SERIALIZER,
+                                    GSON.toJsonTree(line.getValue())
+                            )
+                    );
                 }
-                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()) {
-                        try {
-                            skull.setOwningPlayer(Bukkit.getOfflinePlayer(player));
-                            skull.update(true);
-                        } catch (Exception e) {
-                            e.printStackTrace();
-                        }
-                        return true;
     }
 
-                    final CompoundTag properties = (CompoundTag) skullOwner.getValue().get("Properties");
-                    if (properties == null) {
+    private static boolean initializeSignHack() {
+        if (FAILED_SIGN_INITIALIZATION) {
             return false;
         }
-                    final ListTag textures = properties.getListTag("textures");
-                    if (textures.getValue().isEmpty()) {
-                        return false;
-                    }
-                    final CompoundTag textureCompound = (CompoundTag) textures.getValue().get(0);
-                    if (textureCompound == null) {
-                        return false;
-                    }
-                    String textureValue = textureCompound.getString("Value");
-                    if (textureValue == null) {
-                        return false;
+        if (KYORI_GSON_SERIALIZER != null) {
+            return true; // already initialized
         }
         if (!PaperLib.isPaper()) {
-                        if (!paperErrorTextureSent) {
-                            paperErrorTextureSent = true;
-                            LOGGER.error("Failed to populate skull data in your road schematic - This is a Spigot limitation.");
+            if (!PAPER_SIGN_NOTIFIED) {
+                PAPER_SIGN_NOTIFIED = true;
+                LOGGER.error("Can't populate non-plain sign line. To load modern sign content, use Paper.");
             }
             return false;
         }
-                    final PlayerProfile profile = Bukkit.createProfile(UUID.randomUUID());
-                    profile.setProperty(new ProfileProperty("textures", textureValue));
-                    skull.setPlayerProfile(profile);
-                    skull.update(true);
+        try {
+            char[] dontObfuscate = new char[]{
+                    'n', 'e', 't', '.', 'k', 'y', 'o', 'r', 'i', '.', 'a', 'd', 'v', 'e', 'n', 't', 'u', 'r', 'e', '.',
+                    't', 'e', 'x', 't', '.', 's', 'e', 'r', 'i', 'a', 'l', 'i', 'z', 'e', 'r', '.', 'g', 's', 'o', 'n', '.',
+                    'G', 's', 'o', 'n', 'C', 'o', 'm', 'p', 'o', 'n', 'e', 'n', 't', 'S', 'e', 'r', 'i', 'a', 'l', 'i', 'z', 'e', 'r'
+            };
+            Class<?> gsonComponentSerializerClass = Class.forName(new String(dontObfuscate));
+            KYORI_GSON_SERIALIZER = Arrays.stream(gsonComponentSerializerClass.getMethods())
+                    .filter(method -> method.getName().equals("gson"))
+                    .findFirst()
+                    .orElseThrow().invoke(null);
+            GSON_SERIALIZER_DESERIALIZE_TREE = LOOKUP.unreflect(Arrays
+                    .stream(gsonComponentSerializerClass.getMethods())
+                    .filter(method -> method.getName().equals("deserializeFromTree") && method.getParameterCount() == 1)
+                    .findFirst()
+                    .orElseThrow());
+            BUKKIT_SIGN_SIDE_LINE_SET = LOOKUP.unreflect(Arrays.stream(SignSide.class.getMethods())
+                    .filter(method -> method.getName().equals("line") && method.getParameterCount() == 2)
+                    .findFirst()
+                    .orElseThrow());
             return true;
+        } catch (Throwable e) {
+            FAILED_SIGN_INITIALIZATION = true;
+            LOGGER.error("Failed to initialize sign-hack. Signs populated by schematics might not have their line contents.", e);
+            return false;
+        }
+    }
 
+    /**
+     * Initialize the used NBT tag class. For modern FAWE and WE that'll be Lin - for older ones JNBT.
+     *
+     * @throws ClassNotFoundException if neither can be found.
+     */
+    private static void findNbtCompoundClassType(Consumer<Class<?>> linClass, Consumer<Class<?>> jnbtClass) throws
+            ClassNotFoundException {
+        try {
+            linClass.accept(Class.forName("org.enginehub.linbus.tree.LinTag"));
+        } catch (ClassNotFoundException e) {
+            jnbtClass.accept(Class.forName("com.sk89q.jnbt.Tag"));
         }
-                return false;
     }
-            case "banner" -> {
-                if (state instanceof Banner banner) {
-                    List<Tag> patterns = this.tag.getListTag("Patterns").getValue();
-                    if (patterns == null || patterns.isEmpty()) {
-                        return false;
-                    }
-                    banner.setPatterns(patterns.stream().map(t -> (CompoundTag) t).map(compoundTag -> {
-                        DyeColor color = DyeColor.getByWoolData((byte) compoundTag.getInt("Color"));
-                        PatternType patternType = PatternType.getByIdentifier(compoundTag.getString("Pattern"));
-                        if (color == null || patternType == null) {
+
+    /**
+     * Finds the {@code toLinTag} method on the {@code ToLinTag} interface, if lin-bus is available in the classpath.
+     * <br />
+     * Required to access the underlying lin tag of the used JNBT tag by PlotSquared, so it can be converted into the platforms
+     * native tag later.
+     *
+     * @param linTagClass {@code Tag} class of lin-bus, or {@code null} if not available.
+     * @return the MethodHandle for {@code toLinTag}, or {@code null} if lin-bus is not available in the classpath.
+     * @throws ClassNotFoundException if the {@code ToLinTag} class could not be found.
+     * @throws NoSuchMethodException  if no {@code toLinTag} method exists.
+     * @throws IllegalAccessException shouldn't happen.
+     */
+    private static MethodHandle findToLinTagMethodHandle(Class<?> linTagClass) throws ClassNotFoundException,
+            NoSuchMethodException, IllegalAccessException {
+        if (linTagClass == null) {
             return null;
         }
-                        return new Pattern(color, patternType);
-                    }).filter(Objects::nonNull).toList());
-                    banner.update(true);
-                    return true;
-                }
-                return false;
-            }
-        }
-        return false;
+        return LOOKUP.findVirtual(
+                Class.forName("org.enginehub.linbus.tree.ToLinTag"),
+                "toLinTag",
+                MethodType.methodType(linTagClass)
+        );
     }
 
-    public String getId() {
-        String tileid = this.tag.getString("id").toLowerCase();
-        if (tileid.startsWith("minecraft:")) {
-            tileid = tileid.replace("minecraft:", "");
+    /**
+     * Find the method (handle) to convert from native (= WE/FAWE) NBT tags to minecraft NBT tags.
+     * <br />
+     * Depending on the used version of WE/FAWE, this differs:
+     * <ul>
+     *     <li>On WE/FAWE version pre LinBus introduction: {@code fromNative(org.sk89q.jnbt.Tag)}</li>
+     *     <li>On WE versions post LinBus introduction: {@code fromNative(org.enginehub.linbus.tree.LinTag)}</li>
+     *     <li>On FAWE versions post LinBus introduction: {@code fromNativeLin(org.enginehub.linbus.tree.LinTag)}</li>
+     * </ul>
+     *
+     * @param adapterClass The bukkit adapter implementation class
+     * @param linTagClass  The lin-bus {@code Tag} class, if existing - otherwise {@code null}
+     * @param jnbtTagClass The jnbt {@code Tag} class, if lin-bus was not found in classpath - otherwise {@code null}
+     * @return the method.
+     * @throws IllegalAccessException shouldn't happen as private lookup is used.
+     * @throws NoSuchMethodException  if the method couldn't be found.
+     */
+    private static MethodHandle findPaperweightAdapterFromNativeMethodHandle(
+            Class<?> adapterClass, Class<?> linTagClass, Class<?> jnbtTagClass
+    ) throws IllegalAccessException, NoSuchMethodException {
+        final MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(adapterClass, LOOKUP);
+        if (jnbtTagClass != null) {
+            // usage of JNBT = identical method signatures for WE and FAWE
+            return lookup.findVirtual(adapterClass, "fromNative", MethodType.methodType(Object.class, jnbtTagClass));
+        }
+        try {
+            // FAWE
+            return lookup.findVirtual(adapterClass, "fromNativeLin", MethodType.methodType(Object.class, linTagClass));
+        } catch (NoSuchMethodException e) {
+            // WE
+            return lookup.findVirtual(adapterClass, "fromNative", MethodType.methodType(Object.class, linTagClass));
         }
-        return tileid;
     }
 
-    public List<CompoundTag> serializeInventory(ItemStack[] items) {
-        List<CompoundTag> tags = new ArrayList<>();
-        for (int i = 0; i < items.length; ++i) {
-            if (items[i] != null) {
-                Map<String, Tag> tagData = serializeItem(items[i]);
-                tagData.put("Slot", new ByteTag((byte) i));
-                tags.add(new CompoundTag(tagData));
+    private static MethodHandle findCraftBlockEntityStateLoadDataMethodHandle(Class<?> craftBlockEntityStateClass) throws
+            NoSuchMethodException, IllegalAccessException, ClassNotFoundException {
+        for (final Method method : craftBlockEntityStateClass.getMethods()) {
+            if (method.getName().equals("loadData") && method.getParameterCount() == 1) {
+                return LOOKUP.unreflect(method);
             }
         }
-        return tags;
+        throw new NoSuchMethodException("Couldn't find #loadData(CompoundTag) in " + craftBlockEntityStateClass.getName());
     }
 
-    public Map<String, Tag> serializeItem(ItemStack item) {
-        Map<String, Tag> data = new HashMap<>();
-        data.put("id", new StringTag(item.getType().name()));
-        data.put("Damage", new ShortTag(item.getDurability()));
-        data.put("Count", new ByteTag((byte) item.getAmount()));
-        if (!item.getEnchantments().isEmpty()) {
-            List<CompoundTag> enchantmentList = new ArrayList<>();
-            for (Entry<Enchantment, Integer> entry : item.getEnchantments().entrySet()) {
-                Map<String, Tag> enchantment = new HashMap<>();
-                enchantment.put("id", new StringTag(entry.getKey().toString()));
-                enchantment.put("lvl", new ShortTag(entry.getValue().shortValue()));
-                enchantmentList.add(new CompoundTag(enchantment));
+    private static MethodHandle findCraftBlockEntityStateUpdateMethodHandle(Class<?> craftBlockEntityStateClass) throws
+            NoSuchMethodException, IllegalAccessException, ClassNotFoundException {
+        for (final Method method : craftBlockEntityStateClass.getMethods()) {
+            if (method.getReturnType().equals(Boolean.TYPE) && method.getParameterCount() == 2 &&
+                    method.getParameterTypes()[0] == Boolean.TYPE && method.getParameterTypes()[1] == Boolean.TYPE) {
+                return LOOKUP.unreflect(method);
             }
-            Map<String, Tag> auxData = new HashMap<>();
-            auxData.put("ench", new ListTag(CompoundTag.class, enchantmentList));
-            data.put("tag", new CompoundTag(auxData));
         }
-        return data;
+        throw new NoSuchMethodException("Couldn't find method for #update(boolean, boolean) in " + craftBlockEntityStateClass.getName());
     }
 
 }