refactor!: Align plugin's java version with API java version

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/release-drafter.yml

@@ -13,6 +13,6 @@ jobs:
   update_release_draft:
     runs-on: ubuntu-latest
     steps:
-      - uses: release-drafter/release-drafter@v5.17.5
+      - uses: release-drafter/release-drafter@v5.17.6
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.lift.toml

@@ -0,0 +1,4 @@
+jdkVersion = "17"
+build = "gradle clean build -x test"
+tools = ["findsecbugs", "ErrorProne", "Semgrep", "Detekt", "Infer"]
+ignoreRules = ["CatchAndPrintStackTrace", "ReferenceEquality", "FallThrough", "FutureReturnValueIgnored", "MixedMutabilityReturnType", "EmptyCatch", "MissingCasesInEnumSwitch", "OperatorPrecedence", "StaticAssignmentInConstructor", "ReferenceEquality", "EqualsHashCode", "EqualsGetClass", "TypeParameterUnusedInFormals", "StringSplitter", "InlineMeSuggester", "NULL_DEREFERENCE"]

Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java

@@ -218,6 +218,7 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
     private PlatformWorldManager<World> worldManager;
     private Locale serverLocale;
 
+    @SuppressWarnings("StringSplitter")
     @Override
     public int @NonNull [] serverVersion() {
         if (this.version == null) {
@@ -323,8 +324,6 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
         // Comments
         CommentManager.registerDefaultInboxes();
 
-        plotSquared.startExpiryTasks();
-
         // Do stuff that was previously done in PlotSquared
         // Kill entities
         if (Settings.Enabled_Components.KILL_ROAD_MOBS || Settings.Enabled_Components.KILL_ROAD_VEHICLES) {
@@ -421,6 +420,8 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
             }, TaskTime.ticks(1L));
         }
 
+        plotSquared.startExpiryTasks();
+
         // Once the server has loaded force updating all generators known to P2
         TaskManager.runTaskLater(() -> PlotSquared.platform().setupUtils().updateGenerators(true), TaskTime.ticks(1L));
 
@@ -970,7 +971,6 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
                                                 }
                                                 iterator.remove();
                                                 entity.remove();
-                                                continue;
                                             }
                                         }
                                     } else {
@@ -982,7 +982,6 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
                                             }
                                             iterator.remove();
                                             entity.remove();
-                                            continue;
                                         }
                                     }
                                 }
@@ -1223,7 +1222,7 @@ public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPl
 
     @Override
     @NonNull
-    @SuppressWarnings("ALL")
+    @SuppressWarnings("unchecked")
     public PlayerManager<? extends PlotPlayer<Player>, ? extends Player> playerManager() {
         return (PlayerManager<BukkitPlayer, Player>) injector().getInstance(PlayerManager.class);
     }

Bukkit/src/main/java/com/plotsquared/bukkit/entity/ReplicatingEntityWrapper.java

@@ -461,6 +461,7 @@ public final class ReplicatingEntityWrapper extends EntityWrapper {
         this.tamed.tamed = tamed.isTamed();
     }
 
+    @SuppressWarnings("deprecation") // Paper deprecation
     @Override
     public Entity spawn(World world, int xOffset, int zOffset) {
         Location location = new Location(world, this.getX() + xOffset, this.getY(), this.z + zOffset);

Bukkit/src/main/java/com/plotsquared/bukkit/inject/WorldManagerModule.java

@@ -36,6 +36,7 @@ import org.bukkit.World;
 
 public class WorldManagerModule extends AbstractModule {
 
+    @SuppressWarnings("removal") // Internal use only
     @Provides
     @Singleton
     PlatformWorldManager<World> provideWorldManager() {

Bukkit/src/main/java/com/plotsquared/bukkit/listener/EntitySpawnListener.java

@@ -60,7 +60,7 @@ import java.util.List;
 
 public class EntitySpawnListener implements Listener {
 
-    private final static String KEY = "P2";
+    private static final String KEY = "P2";
     private static boolean ignoreTP = false;
     private static boolean hasPlotArea = false;
     private static String areaName = null;

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PaperListener113.java

@@ -36,7 +36,6 @@ import com.plotsquared.core.plot.world.PlotAreaManager;
 import net.kyori.adventure.text.minimessage.Template;
 import org.bukkit.block.Banner;
 import org.bukkit.block.Beacon;
-import org.bukkit.block.Bed;
 import org.bukkit.block.BlockState;
 import org.bukkit.block.CommandBlock;
 import org.bukkit.block.Comparator;
@@ -51,6 +50,7 @@ import org.bukkit.block.Jukebox;
 import org.bukkit.block.Sign;
 import org.bukkit.block.Skull;
 import org.bukkit.block.Structure;
+import org.bukkit.block.data.type.Bed;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.block.BlockPlaceEvent;
 import org.checkerframework.checker.nullness.qual.NonNull;

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java

@@ -154,7 +154,6 @@ import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.lang.reflect.Field;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Locale;
@@ -224,6 +223,7 @@ public class PlayerEventListener extends PlotListener implements Listener {
         }
     }
 
+    @SuppressWarnings("StringSplitter")
     @EventHandler(ignoreCancelled = true, priority = EventPriority.HIGHEST)
     public void playerCommand(PlayerCommandPreprocessEvent event) {
         String msg = event.getMessage().toLowerCase().replaceAll("/", "").trim();
@@ -379,6 +379,7 @@ public class PlayerEventListener extends PlotListener implements Listener {
         this.eventDispatcher.doRespawnTask(pp);
     }
 
+    @SuppressWarnings("deprecation") // We explicitly want #getHomeSynchronous here
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void onTeleport(PlayerTeleportEvent event) {
         Player player = event.getPlayer();
@@ -1063,9 +1064,13 @@ public class PlayerEventListener extends PlotListener implements Listener {
         if (area == null) {
             return;
         }
-        PlayerBlockEventType eventType = null;
+        PlayerBlockEventType eventType;
         BlockType blocktype1;
         Block block = event.getClickedBlock();
+        if (block == null) {
+            // We do not care in this case, the player is likely interacting with air ("nothing").
+            return;
+        }
         Location location = BukkitUtil.adapt(block.getLocation());
         Action action = event.getAction();
         switch (action) {
@@ -1667,6 +1672,7 @@ public class PlayerEventListener extends PlotListener implements Listener {
         }
     }
 
+    @SuppressWarnings("deprecation") // #getLocate is needed for Spigot compatibility
     @EventHandler
     public void onLocaleChange(final PlayerLocaleChangeEvent event) {
         // The event is fired before the player is deemed online upon login

Bukkit/src/main/java/com/plotsquared/bukkit/listener/SingleWorldListener.java

@@ -43,7 +43,6 @@ import java.lang.reflect.Method;
 
 import static com.plotsquared.core.util.ReflectionUtils.getRefClass;
 
-@SuppressWarnings("unused")
 public class SingleWorldListener implements Listener {
 
     private final Method methodGetHandleChunk;

Bukkit/src/main/java/com/plotsquared/bukkit/player/BukkitPlayer.java

@@ -162,6 +162,7 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         }
     }
 
+    @SuppressWarnings("StringSplitter")
     @Override
     @NonNegative
     public int hasPermissionRange(
@@ -319,7 +320,7 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         if (id == ItemTypes.AIR) {
             // Let's just stop all the discs because why not?
             for (final Sound sound : Arrays.stream(Sound.values())
-                    .filter(sound -> sound.name().contains("DISC")).collect(Collectors.toList())) {
+                    .filter(sound -> sound.name().contains("DISC")).toList()) {
                 player.stopSound(sound);
             }
             // this.player.playEffect(BukkitUtil.getLocation(location), Effect.RECORD_PLAY, Material.AIR);
@@ -331,6 +332,7 @@ public class BukkitPlayer extends PlotPlayer<Player> {
         }
     }
 
+    @SuppressWarnings("deprecation") // Needed for Spigot compatibility
     @Override
     public void kick(final String message) {
         this.player.kickPlayer(message);

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

@@ -51,7 +51,6 @@ import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
 import org.bukkit.Bukkit;
-import org.bukkit.Chunk;
 import org.bukkit.block.Block;
 import org.bukkit.block.Container;
 import org.bukkit.block.data.BlockData;
@@ -199,7 +198,7 @@ public class BukkitQueueCoordinator extends BasicQueueCoordinator {
                     }
                 }
                 if (localChunk.getTiles().size() > 0) {
-                    localChunk.getTiles().forEach(((blockVector3, tag) -> {
+                    localChunk.getTiles().forEach((blockVector3, tag) -> {
                         try {
                             BaseBlock block = getWorld().getBlock(blockVector3).toBaseBlock(tag);
                             getWorld().setBlock(blockVector3, block, noSideEffectSet);
@@ -207,7 +206,7 @@ public class BukkitQueueCoordinator extends BasicQueueCoordinator {
                             StateWrapper sw = new StateWrapper(tag);
                             sw.restoreTag(getWorld().getName(), blockVector3.getX(), blockVector3.getY(), blockVector3.getZ());
                         }
-                    }));
+                    });
                 }
                 if (localChunk.getEntities().size() > 0) {
                     localChunk.getEntities().forEach((location, entity) -> getWorld().createEntity(location, entity));
@@ -238,6 +237,7 @@ public class BukkitQueueCoordinator extends BasicQueueCoordinator {
     /**
      * Set a block to the world. First tries WNA but defaults to normal block setting methods if that fails
      */
+    @SuppressWarnings("unused")
     private void setWorldBlock(int x, int y, int z, @NonNull BaseBlock block, @NonNull BlockVector2 blockVector2, boolean edge) {
         try {
             BlockVector3 loc = BlockVector3.at(x, y, z);
@@ -266,9 +266,7 @@ public class BukkitQueueCoordinator extends BasicQueueCoordinator {
         } catch (WorldEditException ignored) {
             // Fallback to not so nice method
             BlockData blockData = BukkitAdapter.adapt(block);
-            Chunk chunk = getBukkitWorld().getChunkAt(blockVector2.getX(), blockVector2.getZ());
+            Block existing = getBukkitWorld().getBlockAt(x, y, z);
-
-            Block existing = chunk.getBlock(x, y, z);
             final BlockState existingBaseBlock = BukkitAdapter.adapt(existing.getBlockData());
             if (BukkitBlockUtil.get(existing).equals(existingBaseBlock) && existing.getBlockData().matches(blockData)) {
                 return;

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

@@ -166,6 +166,7 @@ public class StateWrapper {
         return str;
     }
 
+    @SuppressWarnings("deprecation") // #setLine is needed for Spigot compatibility
     public boolean restoreTag(String worldName, int x, int y, int z) {
         if (this.tag == null) {
             return false;

Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitInventoryUtil.java

@@ -77,6 +77,7 @@ public class BukkitInventoryUtil extends InventoryUtil {
         return stack;
     }
 
+    @SuppressWarnings("deprecation") // Paper deprecation
     @Override
     public void open(PlotInventory inv) {
         BukkitPlayer bp = (BukkitPlayer) inv.getPlayer();
@@ -113,6 +114,7 @@ public class BukkitInventoryUtil extends InventoryUtil {
         bp.player.updateInventory();
     }
 
+    @SuppressWarnings("deprecation") // Paper deprecation
     public PlotItemStack getItem(ItemStack item) {
         if (item == null) {
             return null;
@@ -145,6 +147,7 @@ public class BukkitInventoryUtil extends InventoryUtil {
                 .toArray(PlotItemStack[]::new);
     }
 
+    @SuppressWarnings("deprecation") // #getTitle is needed for Spigot compatibility
     @Override
     public boolean isOpen(PlotInventory plotInventory) {
         if (!plotInventory.isOpen()) {

Bukkit/src/main/java/com/plotsquared/bukkit/util/UpdateUtility.java

@@ -61,6 +61,7 @@ public class UpdateUtility implements Listener {
         internalVersion = PlotSquared.get().getVersion();
     }
 
+    @SuppressWarnings({"deprecation", "DefaultCharset"}) // Suppress Json deprecation, we can't use features from gson 2.8.1 and newer yet
     public void updateChecker() {
         task = Bukkit.getScheduler().runTaskTimerAsynchronously(this.javaPlugin, () -> {
             try {
@@ -68,7 +69,7 @@ public class UpdateUtility implements Listener {
                         "https://api.spigotmc.org/simple/0.1/index.php?action=getResource&id=77506")
                         .openConnection();
                 connection.setRequestMethod("GET");
-                JsonObject result = (new JsonParser())
+                JsonObject result = new JsonParser()
                         .parse(new JsonReader(new InputStreamReader(connection.getInputStream())))
                         .getAsJsonObject();
                 spigotVersion = result.get("current_version").getAsString();
@@ -91,7 +92,7 @@ public class UpdateUtility implements Listener {
                 notify = false;
                 LOGGER.info("Congratulations! You are running the latest PlotSquared version");
             }
-        }, 0L, Settings.UpdateChecker.POLL_RATE * 60 * 20);
+        }, 0L, (long) Settings.UpdateChecker.POLL_RATE * 60 * 20);
     }
 
     private void cancelTask() {

Bukkit/src/main/java/com/plotsquared/bukkit/util/fawe/FaweSchematicHandler.java

@@ -75,6 +75,7 @@ public class FaweSchematicHandler extends SchematicHandler {
         return delegate.save(tag, path);
     }
 
+    @SuppressWarnings("removal") // Just the override
     @Override
     public void upload(final CompoundTag tag, final UUID uuid, final String file, final RunnableVal<URL> whenDone) {
         delegate.upload(tag, uuid, file, whenDone);

Core/src/main/java/com/plotsquared/core/PlotSquared.java

@@ -342,6 +342,7 @@ public class PlotSquared {
      * @param plotArea the {@link PlotArea} to add.
      * @see #removePlotArea(PlotArea) To remove the reference
      */
+    @SuppressWarnings("unchecked")
     public void addPlotArea(final @NonNull PlotArea plotArea) {
         HashMap<PlotId, Plot> plots;
         if (plots_tmp == null || (plots = plots_tmp.remove(plotArea.toString())) == null) {
@@ -556,6 +557,7 @@ public class PlotSquared {
      *
      * @param input an array of plots to sort
      */
+    @SuppressWarnings("unchecked")
     private void sortPlotsByHash(final @NonNull Plot @NonNull [] input) {
         List<Plot>[] bucket = new ArrayList[32];
         Arrays.fill(bucket, new ArrayList<>());
@@ -696,20 +698,12 @@ public class PlotSquared {
         ArrayList<Plot> toReturn = new ArrayList<>(plots.size());
         for (PlotArea area : areas) {
             switch (type) {
-                case CREATION_DATE:
+                case CREATION_DATE -> toReturn.addAll(sortPlotsByTemp(map.get(area)));
-                    toReturn.addAll(sortPlotsByTemp(map.get(area)));
+                case CREATION_DATE_TIMESTAMP -> toReturn.addAll(sortPlotsByTimestamp(map.get(area)));
-                    break;
+                case DISTANCE_FROM_ORIGIN -> toReturn.addAll(sortPlotsByHash(map.get(area)));
-                case CREATION_DATE_TIMESTAMP:
+                case LAST_MODIFIED -> toReturn.addAll(sortPlotsByModified(map.get(area)));
-                    toReturn.addAll(sortPlotsByTimestamp(map.get(area)));
+                default -> {
-                    break;
+                }
-                case DISTANCE_FROM_ORIGIN:
-                    toReturn.addAll(sortPlotsByHash(map.get(area)));
-                    break;
-                case LAST_MODIFIED:
-                    toReturn.addAll(sortPlotsByModified(map.get(area)));
-                    break;
-                default:
-                    break;
             }
         }
         return toReturn;
@@ -1540,7 +1534,7 @@ public class PlotSquared {
     }
 
     /**
-     * Register a caption map. The namespace needs be equal to the namespace used for
+     * Register a caption map. The namespace needs to be equal to the namespace used for
      * the {@link TranslatableCaption}s inside the map.
      *
      * @param namespace  Namespace

Core/src/main/java/com/plotsquared/core/collection/ArrayUtil.java

@@ -29,7 +29,8 @@ import java.util.Arrays;
 
 public class ArrayUtil {
 
-    public static final <T> T[] concatAll(T[] first, T[]... rest) {
+    @SuppressWarnings("unchecked")
+    public static <T> T[] concatAll(T[] first, T[]... rest) {
         int totalLength = first.length;
         for (T[] array : rest) {
             totalLength += array.length;

Core/src/main/java/com/plotsquared/core/collection/FlatRandomCollection.java

@@ -35,6 +35,7 @@ public class FlatRandomCollection<T> extends RandomCollection<T> {
 
     private final T[] values;
 
+    @SuppressWarnings("unchecked")
     public FlatRandomCollection(Map<T, Double> weights, Random random) {
         super(weights, random);
         int max = 0;

Core/src/main/java/com/plotsquared/core/collection/QuadMap.java

@@ -241,6 +241,7 @@ public class QuadMap<T> {
         return false;
     }
 
+    @SuppressWarnings("unchecked")
     public void recalculateSkip() {
         QuadMap<T> map = null;
         for (QuadMap<T> current : new QuadMap[]{this.one, this.two, this.three, this.four}) {

Core/src/main/java/com/plotsquared/core/command/Clear.java

@@ -58,6 +58,7 @@ import java.util.concurrent.CompletableFuture;
 public class Clear extends Command {
 
     private final EventDispatcher eventDispatcher;
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     private final GlobalBlockQueue blockQueue;
 
     @Inject

Core/src/main/java/com/plotsquared/core/command/Command.java

@@ -375,7 +375,6 @@ public abstract class Command {
             boolean failed = args.length < reqArgs.length;
             String[] baseSplit = getCommandString().split(" ");
             String[] fullSplit = getUsage().split(" ");
-            String base = getCommandString();
             if (fullSplit.length - baseSplit.length < reqArgs.length) {
                 String[] tmp = new String[baseSplit.length + reqArgs.length];
                 System.arraycopy(fullSplit, 0, tmp, 0, fullSplit.length);

Core/src/main/java/com/plotsquared/core/command/Condense.java

@@ -69,6 +69,7 @@ public class Condense extends SubCommand {
         this.worldUtil = worldUtil;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public boolean onCommand(final PlotPlayer<?> player, String[] args) {
         if (args.length != 2 && args.length != 3) {

Core/src/main/java/com/plotsquared/core/command/DatabaseCommand.java

@@ -255,7 +255,7 @@ public class DatabaseCommand extends SubCommand {
                 player.sendMessage(TranslatableCaption.of("database.failed_to_save_plots"));
                 player.sendMessage(TranslatableCaption.of("errors.stacktrace_begin"));
                 e.printStackTrace();
-                player.sendMessage(TranslatableCaption.of(("errors.stacktrace_end")));
+                player.sendMessage(TranslatableCaption.of("errors.stacktrace_end"));
                 player.sendMessage(TranslatableCaption.of("database.invalid_args"));
                 return false;
             }

Core/src/main/java/com/plotsquared/core/command/Download.java

@@ -94,12 +94,12 @@ public class Download extends SubCommand {
             player.sendMessage(TranslatableCaption.of("info.plot_unowned"));
             return false;
         }
-        if ((Settings.Done.REQUIRED_FOR_DOWNLOAD && (!DoneFlag.isDone(plot))) && !Permissions
+        if ((Settings.Done.REQUIRED_FOR_DOWNLOAD && !DoneFlag.isDone(plot)) && !Permissions
                 .hasPermission(player, Permission.PERMISSION_ADMIN_COMMAND_DOWNLOAD)) {
             player.sendMessage(TranslatableCaption.of("done.done_not_done"));
             return false;
         }
-        if ((!plot.isOwner(player.getUUID())) && !Permissions
+        if (!plot.isOwner(player.getUUID()) && !Permissions
                 .hasPermission(player, Permission.PERMISSION_ADMIN.toString())) {
             player.sendMessage(TranslatableCaption.of("permission.no_plot_perms"));
             return false;

Core/src/main/java/com/plotsquared/core/command/FlagCommand.java

@@ -367,6 +367,7 @@ public final class FlagCommand extends Command {
         );
     }
 
+    @SuppressWarnings({"unchecked", "rawtypes"})
     @CommandDeclaration(command = "add",
             aliases = {"a", "add"},
             usage = "/plot flag add <flag> <value>",
@@ -435,6 +436,7 @@ public final class FlagCommand extends Command {
         );
     }
 
+    @SuppressWarnings({"unchecked", "rawtypes"})
     @CommandDeclaration(command = "remove",
             aliases = {"r", "remove", "delete"},
             usage = "/plot flag remove <flag> [values]",

Core/src/main/java/com/plotsquared/core/command/Like.java

@@ -112,7 +112,7 @@ public class Like extends SubCommand {
                     });
                     for (final Plot plot : plots) {
                         if ((!Settings.Done.REQUIRED_FOR_RATINGS || DoneFlag.isDone(plot)) && plot
-                                .isBasePlot() && (!plot.getLikes().containsKey(uuid))) {
+                                .isBasePlot() && !plot.getLikes().containsKey(uuid)) {
                             plot.teleportPlayer(player, TeleportCause.COMMAND_LIKE, result -> {
                             });
                             player.sendMessage(TranslatableCaption.of("tutorial.rate_this"));

Core/src/main/java/com/plotsquared/core/command/Rate.java

@@ -104,7 +104,7 @@ public class Rate extends SubCommand {
                     UUID uuid = player.getUUID();
                     for (Plot p : plots) {
                         if ((!Settings.Done.REQUIRED_FOR_RATINGS || DoneFlag.isDone(p)) && p
-                                .isBasePlot() && (!p.getRatings().containsKey(uuid)) && !p
+                                .isBasePlot() && !p.getRatings().containsKey(uuid) && !p
                                 .isAdded(uuid)) {
                             p.teleportPlayer(player, TeleportCause.COMMAND_RATE, result -> {
                             });

Core/src/main/java/com/plotsquared/core/command/RegenAllRoads.java

@@ -88,7 +88,6 @@ public class RegenAllRoads extends SubCommand {
             );
             return false;
         }
-        String name = args[0];
         PlotManager manager = area.getPlotManager();
         if (!(manager instanceof HybridPlotManager)) {
             player.sendMessage(TranslatableCaption.of("errors.invalid_plot_world"));

Core/src/main/java/com/plotsquared/core/command/SchematicCmd.java

@@ -181,8 +181,6 @@ public class SchematicCmd extends SubCommand {
                 });
             }
             case "saveall", "exportall" -> {
-                Location loc = player.getLocation();
-                final Plot plot = loc.getPlotAbs();
                 if (!(player instanceof ConsolePlayer)) {
                     player.sendMessage(TranslatableCaption.of("console.not_console"));
                     return false;

Core/src/main/java/com/plotsquared/core/command/Set.java

@@ -100,7 +100,7 @@ public class Set extends SubCommand {
 
                 if (Settings.Enabled_Components.CHUNK_PROCESSOR) {
                     forbiddenTypes.addAll(worldUtil.getTileEntityTypes().stream().map(
-                            BlockType::getName).collect(Collectors.toList()));
+                            BlockType::getName).toList());
                 }
 
                 if (!Permissions.hasPermission(player, Permission.PERMISSION_ADMIN_ALLOW_UNSAFE) &&

Core/src/main/java/com/plotsquared/core/command/Visit.java

@@ -361,30 +361,4 @@ public class Visit extends Command {
         return completions;
     }
 
-    private void completeNumbers(final List<Command> commands, final String arg, final int start) {
-        for (int i = 0; i < 100; i++) {
-            final String command = Integer.toString(start + 1);
-            if (!command.toLowerCase().startsWith(arg.toLowerCase())) {
-                continue;
-            }
-            commands.add(new Command(this, false, command, "",
-                    RequiredType.NONE, CommandCategory.TELEPORT
-            ) {
-            });
-        }
-    }
-
-    private void completeAreas(final List<Command> commands, final String arg) {
-        for (final PlotArea area : this.plotAreaManager.getAllPlotAreas()) {
-            final String areaName = area.getWorldName() + ";" + area.getId();
-            if (!areaName.toLowerCase().startsWith(arg.toLowerCase())) {
-                continue;
-            }
-            commands.add(new Command(this, false, area.getWorldName() + ";" + area.getId(), "",
-                    RequiredType.NONE, CommandCategory.TELEPORT
-            ) {
-            });
-        }
-    }
-
 }

Core/src/main/java/com/plotsquared/core/components/ComponentPreset.java

@@ -65,6 +65,7 @@ public class ComponentPreset implements ConfigurationSerializable {
         this.icon = icon;
     }
 
+    @SuppressWarnings("unchecked")
     public static ComponentPreset deserialize(final @NonNull Map<String, Object> map) {
         final ClassicPlotManagerComponent classicPlotManagerComponent = ClassicPlotManagerComponent
                 .fromString(map.getOrDefault("component", "").toString()).orElseThrow(() ->

Core/src/main/java/com/plotsquared/core/components/ComponentPresetManager.java

@@ -75,6 +75,7 @@ public class ComponentPresetManager {
     private final InventoryUtil inventoryUtil;
     private File componentsFile;
 
+    @SuppressWarnings("unchecked")
     @Inject
     public ComponentPresetManager(final @NonNull EconHandler econHandler, final @NonNull InventoryUtil inventoryUtil) throws
             IOException {

Core/src/main/java/com/plotsquared/core/configuration/Config.java

@@ -58,6 +58,7 @@ public class Config {
      * @param <T>  value type
      * @return value
      */
+    @SuppressWarnings("unchecked")
     public static <T> T get(String key, Class<?> root) {
         String[] split = key.split("\\.");
         Object instance = getInstance(split, root);
@@ -183,6 +184,7 @@ public class Config {
         return value != null ? value.toString() : "null";
     }
 
+    @SuppressWarnings({"unchecked", "rawtypes"})
     private static void save(PrintWriter writer, Class<?> clazz, Object instance, int indent) {
         try {
             String lineSeparator = System.lineSeparator();
@@ -258,21 +260,6 @@ public class Config {
         }
     }
 
-    /**
-     * Get the field for a specific config node.
-     *
-     * @param split the node (split by period)
-     * @param root
-     * @return
-     */
-    private static Field getField(String[] split, Class<?> root) {
-        Object instance = getInstance(split, root);
-        if (instance == null) {
-            return null;
-        }
-        return getField(split, instance);
-    }
-
     /**
      * Get the field for a specific config node and instance<br>
      * Note: As expiry can have multiple blocks there will be multiple instances
@@ -305,6 +292,7 @@ public class Config {
      * @param root
      * @return The instance or null
      */
+    @SuppressWarnings({"unchecked", "rawtypes"})
     private static Object getInstance(String[] split, Class<?> root) {
         try {
             Class<?> clazz = root == null ? MethodHandles.lookup().lookupClass() : root;

Core/src/main/java/com/plotsquared/core/configuration/Settings.java

@@ -196,6 +196,8 @@ public class Settings extends Config {
         public boolean CONFIRMATION = true;
         public int DAYS = 90;
         public int SKIP_ACCOUNT_AGE_DAYS = -1;
+        @Comment("True, if a plot should be deleted if the plot owner is unknown to the server")
+        public boolean DELETE_IF_OWNER_IS_UNKNOWN = false;
         public List<String> WORLDS = new ArrayList<>(Collections.singletonList("*"));
 
 

Core/src/main/java/com/plotsquared/core/database/SQLManager.java

@@ -101,7 +101,9 @@ public class SQLManager implements AbstractDB {
     private final String prefix;
     private final Database database;
     private final boolean mySQL;
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     private final EventDispatcher eventDispatcher;
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     private final PlotListener plotListener;
     private final YamlConfiguration worldConfiguration;
     /**
@@ -408,7 +410,6 @@ public class SQLManager implements AbstractDB {
                 while (iterator.hasNext()) {
                     try {
                         Entry<Plot, Queue<UniqueStatement>> entry = iterator.next();
-                        Plot plot = entry.getKey();
                         Queue<UniqueStatement> tasks = entry.getValue();
                         if (tasks.isEmpty()) {
                             iterator.remove();
@@ -2295,8 +2296,6 @@ public class SQLManager implements AbstractDB {
                     int size = uniqueIdsList.size();
                     int packet = 990;
                     int amount = size / packet;
-                    int count = 0;
-                    int last = -1;
                     for (int j = 0; j <= amount; j++) {
                         List<Integer> subList =
                                 uniqueIdsList.subList(j * packet, Math.min(size, (j + 1) * packet));
@@ -3200,6 +3199,7 @@ public class SQLManager implements AbstractDB {
         return true;
     }
 
+    @SuppressWarnings({"unchecked", "unused"})
     @Override
     public void validateAllPlots(Set<Plot> toValidate) {
         if (!isValid()) {
@@ -3455,15 +3455,7 @@ public class SQLManager implements AbstractDB {
 
     }
 
-    private static class UUIDPair {
+    private record UUIDPair(int id, UUID uuid) {
-
-        public final int id;
-        public final UUID uuid;
-
-        public UUIDPair(int id, UUID uuid) {
-            this.id = id;
-            this.uuid = uuid;
-        }
 
     }
 

Core/src/main/java/com/plotsquared/core/events/PlayerAutoPlotsChosenEvent.java

@@ -40,8 +40,6 @@ import java.util.List;
  */
 public class PlayerAutoPlotsChosenEvent extends PlotPlayerEvent {
 
-    private Result eventResult;
-
     private List<Plot> plots;
 
     /**

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

@@ -97,8 +97,8 @@ public class HybridGen extends IndependentPlotGenerator {
         }
         // Coords
         Location min = result.getMin();
-        int bx = (min.getX()) - hybridPlotWorld.ROAD_OFFSET_X;
+        int bx = min.getX() - hybridPlotWorld.ROAD_OFFSET_X;
-        int bz = (min.getZ()) - hybridPlotWorld.ROAD_OFFSET_Z;
+        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;

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

@@ -148,12 +148,22 @@ public class HybridUtils {
                 return;
             }
 
-            ChunkQueueCoordinator chunk = new ChunkQueueCoordinator(bot, top, false);
+            ChunkQueueCoordinator chunk = new ChunkQueueCoordinator(worldUtil.getWeWorld(world), bot, top, false);
             hpw.getGenerator().generateChunk(chunk, hpw);
 
+            final BlockState airBlock = BlockTypes.AIR.getDefaultState();
             final BlockState[][][] oldBlocks = chunk.getBlocks();
             final BlockState[][][] newBlocks = new BlockState[256][width][length];
-            final BlockState airBlock = BlockTypes.AIR.getDefaultState();
+            for (final BlockState[][] newBlock : newBlocks) {
+                for (final BlockState[] blockStates : newBlock) {
+                    Arrays.fill(blockStates, airBlock);
+                }
+            }
+            for (final BlockState[][] oldBlock : oldBlocks) {
+                for (final BlockState[] blockStates : oldBlock) {
+                    Arrays.fill(blockStates, airBlock);
+                }
+            }
 
             System.gc();
             System.gc();
@@ -221,9 +231,6 @@ public class HybridUtils {
                         for (int y = 0; y < 256; y++) {
                             BlockState old = oldBlocks[y][x][z];
                             try {
-                                if (old == null) {
-                                    old = airBlock;
-                                }
                                 BlockState now = newBlocks[y][x][z];
                                 if (!old.equals(now)) {
                                     changes[i]++;

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

@@ -95,6 +95,7 @@ public abstract class IndependentPlotGenerator {
      * @param world ChunkGenerator Implementation
      * @return Chunk generator
      */
+    @SuppressWarnings("unchecked")
     public <T> GeneratorWrapper<T> specify(final @NonNull String world) {
         return (GeneratorWrapper<T>) PlotSquared.platform().wrapPlotGenerator(world, this);
     }

Core/src/main/java/com/plotsquared/core/listener/ProcessedWEExtent.java

@@ -42,8 +42,6 @@ import com.sk89q.worldedit.world.biome.BiomeType;
 import com.sk89q.worldedit.world.block.BaseBlock;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockStateHolder;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.lang.reflect.Field;
@@ -53,8 +51,6 @@ import java.util.Set;
 
 public class ProcessedWEExtent extends AbstractDelegateExtent {
 
-    private static final Logger LOGGER = LogManager.getLogger("PlotSquared/" + ProcessedWEExtent.class.getSimpleName());
-
     private final Set<CuboidRegion> mask;
     private final String world;
     private final int max;
@@ -162,6 +158,7 @@ public class ProcessedWEExtent extends AbstractDelegateExtent {
         return null;
     }
 
+    @SuppressWarnings("deprecation")
     @Override
     public boolean setBiome(BlockVector2 position, BiomeType biome) {
         return WEManager.maskContains(this.mask, position.getX(), position.getZ()) && super

Core/src/main/java/com/plotsquared/core/listener/WEExtent.java

@@ -54,6 +54,7 @@ public class WEExtent extends AbstractDelegateExtent {
         this.mask = mask;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public boolean setBlock(BlockVector3 location, BlockStateHolder block)
             throws WorldEditException {

Core/src/main/java/com/plotsquared/core/player/MetaDataAccess.java

@@ -53,7 +53,7 @@ public abstract class MetaDataAccess<T> implements AutoCloseable {
         this.lockAccess = lockAccess;
     }
 
-    @SuppressWarnings("ALL")
+    @SuppressWarnings("unchecked")
     private static <E extends Throwable> void sneakyThrow(final Throwable e) throws E {
         throw (E) e;
     }

Core/src/main/java/com/plotsquared/core/player/MetaDataKey.java

@@ -62,6 +62,7 @@ public final class MetaDataKey<T> {
      * @param <T>  Type
      * @return MetaData key instance
      */
+    @SuppressWarnings("unchecked")
     public static @NonNull <T> MetaDataKey<T> of(final @NonNull String key, final @NonNull TypeLiteral<T> type) {
         synchronized (keyMetaData) {
             return (MetaDataKey<T>)

Core/src/main/java/com/plotsquared/core/player/PersistentMetaDataAccess.java

@@ -47,6 +47,7 @@ final class PersistentMetaDataAccess<T> extends MetaDataAccess<T> {
         return this.getPlayer().hasPersistentMeta(getMetaDataKey().toString());
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public @Nullable T remove() {
         this.checkClosed();

Core/src/main/java/com/plotsquared/core/player/PlotPlayer.java

@@ -104,7 +104,8 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer,
     private static final Set<PlotPlayer<?>> debugModeEnabled =
             Collections.synchronizedSet(new HashSet<>());
 
-    private static final Map<Class, PlotPlayerConverter> converters = new HashMap<>();
+    @SuppressWarnings("rawtypes")
+    private static final Map<Class<?>, PlotPlayerConverter> converters = new HashMap<>();
     private final LockRepository lockRepository = new LockRepository();
     private final PlotAreaManager plotAreaManager;
     private final EventDispatcher eventDispatcher;
@@ -128,6 +129,7 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer,
         this.permissionHandler = permissionHandler;
     }
 
+    @SuppressWarnings({"rawtypes", "unchecked"})
     public static <T> PlotPlayer<T> from(final @NonNull T object) {
         // fast path
         if (converters.containsKey(object.getClass())) {
@@ -234,6 +236,7 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer,
      * @param <T> the object type to return
      * @return the value assigned to the key or null if it does not exist
      */
+    @SuppressWarnings("unchecked")
     <T> T getMeta(String key) {
         if (this.meta != null) {
             return (T) this.meta.get(key);
@@ -361,7 +364,6 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer,
     }
 
     public int getClusterCount(String world) {
-        UUID uuid = getUUID();
         int count = 0;
         for (PlotArea area : this.plotAreaManager.getPlotAreasSet(world)) {
             for (PlotCluster cluster : area.getClusters()) {
@@ -795,16 +797,16 @@ public abstract class PlotPlayer<P> implements CommandCaller, OfflinePlotPlayer,
             final @NonNull MetaDataKey<T> key,
             final @NonNull T value
     ) {
-        final Object rawValue = value;
         if (key.getType().getRawType().equals(Integer.class)) {
-            this.setPersistentMeta(key.toString(), Ints.toByteArray((int) rawValue));
+            this.setPersistentMeta(key.toString(), Ints.toByteArray((int) (Object) value));
         } else if (key.getType().getRawType().equals(Boolean.class)) {
-            this.setPersistentMeta(key.toString(), ByteArrayUtilities.booleanToBytes((boolean) rawValue));
+            this.setPersistentMeta(key.toString(), ByteArrayUtilities.booleanToBytes((boolean) (Object) value));
         } else {
             throw new IllegalArgumentException(String.format("Unknown meta data type '%s'", key.getType()));
         }
     }
 
+    @SuppressWarnings("unchecked")
     @Nullable <T> T getPersistentMeta(final @NonNull MetaDataKey<T> key) {
         final byte[] value = this.getPersistentMeta(key.toString());
         if (value == null) {

Core/src/main/java/com/plotsquared/core/player/TemporaryMetaDataAccess.java

@@ -47,6 +47,7 @@ final class TemporaryMetaDataAccess<T> extends MetaDataAccess<T> {
         return this.getPlayer().getMeta(this.getMetaDataKey().toString()) != null;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public @Nullable T remove() {
         this.checkClosed();

Core/src/main/java/com/plotsquared/core/plot/Plot.java

@@ -2834,7 +2834,7 @@ public class Plot {
                         if (this.isOnline()) {
                             seen = TranslatableCaption.of("info.now").getComponent(player);
                         } else {
-                            int time = (int) (ExpireManager.IMP.getAge(this) / 1000);
+                            int time = (int) (ExpireManager.IMP.getAge(this, false) / 1000);
                             if (time != 0) {
                                 seen = TimeUtil.secToTime(time);
                             } else {

Core/src/main/java/com/plotsquared/core/plot/PlotArea.java

@@ -439,38 +439,6 @@ public abstract class PlotArea {
         loadConfiguration(config);
     }
 
-    private Component getFlagsComponent(Component flagsComponent, Collection<PlotFlag<?, ?>> flagCollection) {
-        if (flagCollection.isEmpty()) {
-            flagsComponent = MINI_MESSAGE.parse(TranslatableCaption.of("flag.no_flags").getComponent(LocaleHolder.console()));
-        } else {
-            String prefix = " ";
-            for (final PlotFlag<?, ?> flag : flagCollection) {
-                Object value;
-                if (flag instanceof DoubleFlag && !Settings.General.SCIENTIFIC) {
-                    value = FLAG_DECIMAL_FORMAT.format(flag.getValue());
-                } else {
-                    value = flag.toString();
-                }
-                Component snip = MINI_MESSAGE.parse(
-                        prefix + CaptionUtility
-                                .format(
-                                        ConsolePlayer.getConsole(),
-                                        TranslatableCaption.of("info.plot_flag_list").getComponent(LocaleHolder.console())
-                                ),
-                        Template.of("flag", flag.getName()),
-                        Template.of("value", CaptionUtility.formatRaw(ConsolePlayer.getConsole(), value.toString()))
-                );
-                if (flagsComponent != null) {
-                    flagsComponent.append(snip);
-                } else {
-                    flagsComponent = snip;
-                }
-                prefix = ", ";
-            }
-        }
-        return flagsComponent;
-    }
-
     public abstract void loadConfiguration(ConfigurationSection config);
 
     /**

Core/src/main/java/com/plotsquared/core/plot/expiration/ExpireManager.java

@@ -216,24 +216,20 @@ public class ExpireManager {
                 applicable.add(et);
             }
         }
-
         if (applicable.isEmpty()) {
             return new ArrayList<>();
         }
 
+        // Don't delete server plots
         if (plot.getFlag(ServerPlotFlag.class)) {
             return new ArrayList<>();
         }
 
-        long diff = getAge(plot);
-        if (diff == 0) {
-            return new ArrayList<>();
-        }
         // Filter out non old plots
         boolean shouldCheckAccountAge = false;
         for (int i = 0; i < applicable.size(); i++) {
             ExpiryTask et = applicable.poll();
-            if (et.applies(diff)) {
+            if (et.applies(getAge(plot, et.shouldDeleteForUnknownOwner()))) {
                 applicable.add(et);
                 shouldCheckAccountAge |= et.getSettings().SKIP_ACCOUNT_AGE_DAYS != -1;
             }
@@ -243,9 +239,9 @@ public class ExpireManager {
         }
         // Check account age
         if (shouldCheckAccountAge) {
-            long accountAge = getAge(plot);
             for (int i = 0; i < applicable.size(); i++) {
                 ExpiryTask et = applicable.poll();
+                long accountAge = getAge(plot, et.shouldDeleteForUnknownOwner());
                 if (et.appliesAccountAge(accountAge)) {
                     applicable.add(et);
                 }
@@ -309,9 +305,8 @@ public class ExpireManager {
             return false;
         }
         this.running = 2;
-        final ConcurrentLinkedDeque<Plot> plots =
-                new ConcurrentLinkedDeque<>(PlotQuery.newQuery().allPlots().asList());
         TaskManager.runTaskAsync(new Runnable() {
+            private ConcurrentLinkedDeque<Plot> plots = null;
             @Override
             public void run() {
                 final Runnable task = this;
@@ -319,7 +314,9 @@ public class ExpireManager {
                     ExpireManager.this.running = 0;
                     return;
                 }
-                long start = System.currentTimeMillis();
+                if (plots == null) {
+                    plots = new ConcurrentLinkedDeque<>(PlotQuery.newQuery().allPlots().asList());
+                }
                 while (!plots.isEmpty()) {
                     if (ExpireManager.this.running != 2) {
                         ExpireManager.this.running = 0;
@@ -454,7 +451,20 @@ public class ExpireManager {
         plot.getPlotModificationManager().deletePlot(null, whenDone);
     }
 
+    @Deprecated(forRemoval = true, since = "TODO")
     public long getAge(UUID uuid) {
+        return getAge(uuid, false);
+    }
+
+    /**
+     * Get the age (last play time) of the passed player
+     *
+     * @param uuid                     the uuid of the owner to check against
+     * @param shouldDeleteUnknownOwner {@code true} if an unknown player should be counted as never online
+     * @return the millis since the player was last online, or {@link Long#MAX_VALUE} if player was never online
+     * @since TODO
+     */
+    public long getAge(UUID uuid, final boolean shouldDeleteUnknownOwner) {
         if (PlotSquared.platform().playerManager().getPlayerIfExists(uuid) != null) {
             return 0;
         }
@@ -464,7 +474,7 @@ public class ExpireManager {
             if (opp != null && (last = opp.getLastPlayed()) != 0) {
                 this.dates_cache.put(uuid, last);
             } else {
-                return 0;
+                return shouldDeleteUnknownOwner ? Long.MAX_VALUE : 0;
             }
         }
         if (last == 0) {
@@ -473,7 +483,7 @@ public class ExpireManager {
         return System.currentTimeMillis() - last;
     }
 
-    public long getAge(Plot plot) {
+    public long getAge(Plot plot, final boolean shouldDeleteUnknownOwner) {
         if (!plot.hasOwner() || Objects.equals(DBFunc.EVERYONE, plot.getOwner())
                 || PlotSquared.platform().playerManager().getPlayerIfExists(plot.getOwner()) != null || plot.getRunning() > 0) {
             return 0;
@@ -495,7 +505,7 @@ public class ExpireManager {
         }
         long min = Long.MAX_VALUE;
         for (UUID owner : plot.getOwners()) {
-            long age = getAge(owner);
+            long age = getAge(owner, shouldDeleteUnknownOwner);
             if (age < min) {
                 min = age;
             }

Core/src/main/java/com/plotsquared/core/plot/expiration/ExpiryTask.java

@@ -80,7 +80,7 @@ public class ExpiryTask {
                         diff = settings.REQUIRED_PLOTS - plots.size();
                     }
                     List<Long> entireList =
-                            plots.stream().map(plot -> ExpireManager.IMP.getAge(plot))
+                            plots.stream().map(plot -> ExpireManager.IMP.getAge(plot, settings.DELETE_IF_OWNER_IS_UNKNOWN))
                                     .collect(Collectors.toList());
                     List<Long> top = new ArrayList<>(diff + 1);
                     if (diff > 1000) {
@@ -157,5 +157,13 @@ public class ExpiryTask {
         return settings.CONFIRMATION;
     }
 
+    /**
+     * Returns {@code true} if this task respects unknown owners
+     * @return {@code true} if unknown owners should be counted as never online
+     * @since TODO
+     */
+    public boolean shouldDeleteForUnknownOwner() {
+        return settings.DELETE_IF_OWNER_IS_UNKNOWN;
+    }
 
 }

Core/src/main/java/com/plotsquared/core/plot/expiration/PlotAnalysis.java

@@ -558,6 +558,7 @@ public class PlotAnalysis {
         return ranks;
     }
 
+    @SuppressWarnings("unchecked")
     public static void sort(int[] input) {
         int SIZE = 10;
         List<Integer>[] bucket = new ArrayList[SIZE];

Core/src/main/java/com/plotsquared/core/plot/flag/FlagContainer.java

@@ -96,7 +96,7 @@ public class FlagContainer {
     }
 
     /**
-     * Cast a plot flag with wildcard parameters into a parametrisized
+     * Cast a plot flag with wildcard parameters into a parametrized
      * PlotFlag. This is an unsafe operation, and should only be performed
      * if the generic parameters are known beforehand.
      *
@@ -105,7 +105,7 @@ public class FlagContainer {
      * @param <T>  Flag type
      * @return Casted flag
      */
-    @SuppressWarnings("ALL")
+    @SuppressWarnings("unchecked")
     public static <V, T extends PlotFlag<V, ?>> T castUnsafe(
             final PlotFlag<?, ?> flag
     ) {
@@ -181,6 +181,7 @@ public class FlagContainer {
      * @param <V>  flag value type
      * @return value of flag removed
      */
+    @SuppressWarnings("unchecked")
     public <V, T extends PlotFlag<V, ?>> V removeFlag(final T flag) {
         final Object value = this.flagMap.remove(flag.getClass());
         if (this.plotFlagUpdateHandler != null) {

Core/src/main/java/com/plotsquared/core/plot/flag/implementations/PlotTitleFlag.java

@@ -29,6 +29,7 @@ import com.plotsquared.core.configuration.caption.TranslatableCaption;
 import com.plotsquared.core.plot.PlotTitle;
 import com.plotsquared.core.plot.flag.FlagParseException;
 import com.plotsquared.core.plot.flag.PlotFlag;
+import com.plotsquared.core.util.StringMan;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 public class PlotTitleFlag extends PlotFlag<PlotTitle, PlotTitleFlag> {
@@ -56,17 +57,18 @@ public class PlotTitleFlag extends PlotFlag<PlotTitle, PlotTitleFlag> {
         if (!input.contains("\"")) {
             return new PlotTitleFlag(new PlotTitle(input, ""));
         }
-        input = input.substring(input.indexOf("\""));
+
-        input = input.substring(0, input.lastIndexOf("\"") + 1);
+        var split = StringMan.splitMessage(input);
-        String[] inputs = input.split("\"");
+
-        PlotTitle value;
+        if (split.isEmpty() || split.size() > 2) {
-        if (inputs.length == 2) {
-            value = new PlotTitle(inputs[1], "");
-        } else if (inputs.length > 3) {
-            value = new PlotTitle(inputs[1], inputs[3]);
-        } else {
             throw new FlagParseException(this, input, TranslatableCaption.of("flags.flag_error_title"));
         }
+        PlotTitle value;
+        if (split.size() == 1) {
+            value = new PlotTitle(split.get(0), "");
+        } else {
+            value = new PlotTitle(split.get(0), split.get(1));
+        }
         return new PlotTitleFlag(value);
     }
 

Core/src/main/java/com/plotsquared/core/plot/world/SinglePlotArea.java

@@ -57,7 +57,9 @@ import java.nio.file.Files;
 
 public class SinglePlotArea extends GridPlotWorld {
 
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     private final EventDispatcher eventDispatcher;
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     private final PlotListener plotListener;
     public boolean VOID = false;
 
@@ -273,6 +275,7 @@ public class SinglePlotArea extends GridPlotWorld {
         return false; // do not create signs for single plots
     }
 
+    @SuppressWarnings("deprecation")
     protected Plot adapt(Plot p) {
         if (p instanceof SinglePlot) {
             return p;

Core/src/main/java/com/plotsquared/core/queue/BasicQueueCoordinator.java

@@ -57,7 +57,6 @@ public abstract class BasicQueueCoordinator extends QueueCoordinator {
     private final ConcurrentHashMap<BlockVector2, LocalChunk> blockChunks = new ConcurrentHashMap<>();
     private final List<BlockVector2> readRegion = new ArrayList<>();
     private final List<ProgressSubscriber> progressSubscribers = new ArrayList<>();
-    private long modified;
     private LocalChunk lastWrappedChunk;
     private int lastX = Integer.MIN_VALUE;
     private int lastZ = Integer.MIN_VALUE;
@@ -76,7 +75,6 @@ public abstract class BasicQueueCoordinator extends QueueCoordinator {
     public BasicQueueCoordinator(@NonNull World world) {
         super(world);
         this.world = world;
-        this.modified = System.currentTimeMillis();
     }
 
     @Override
@@ -94,7 +92,6 @@ public abstract class BasicQueueCoordinator extends QueueCoordinator {
 
     @Override
     public final void setModified(long modified) {
-        this.modified = modified;
     }
 
     @Override
@@ -120,6 +117,7 @@ public abstract class BasicQueueCoordinator extends QueueCoordinator {
         return setBlock(x, y, z, id.toBaseBlock());
     }
 
+    @SuppressWarnings("removal")
     @Override
     public boolean setBiome(int x, int z, @NonNull BiomeType biomeType) {
         LocalChunk chunk = getChunk(x >> 4, z >> 4);

Core/src/main/java/com/plotsquared/core/queue/ChunkQueueCoordinator.java

@@ -46,13 +46,20 @@ public class ChunkQueueCoordinator extends ScopedQueueCoordinator {
     private final int length;
     private final BlockVector3 bot;
     private final BlockVector3 top;
+    private final World weWorld;
 
-    public ChunkQueueCoordinator(@NonNull BlockVector3 bot, @NonNull BlockVector3 top, boolean biomes) {
+    public ChunkQueueCoordinator(
+            final @NonNull World weWorld,
+            @NonNull BlockVector3 bot,
+            @NonNull BlockVector3 top,
+            boolean biomes
+    ) {
         super(null, Location.at("", 0, 0, 0), Location.at("", 15, 255, 15));
+        this.weWorld = weWorld;
         this.width = top.getX() - bot.getX() + 1;
         this.length = top.getZ() - bot.getZ() + 1;
-        this.result = new BlockState[256][][];
+        this.result = new BlockState[256][width][length];
-        this.biomeResult = biomes ? new BiomeType[256][][] : null;
+        this.biomeResult = biomes ? new BiomeType[256][width][length] : null;
         this.bot = bot;
         this.top = top;
     }
@@ -137,7 +144,7 @@ public class ChunkQueueCoordinator extends ScopedQueueCoordinator {
 
     @Override
     public @Nullable World getWorld() {
-        return super.getWorld();
+        return weWorld;
     }
 
     @Override

Core/src/main/java/com/plotsquared/core/queue/QueueCoordinator.java

@@ -56,6 +56,7 @@ public abstract class QueueCoordinator {
     private Object chunkObject;
     private final AtomicBoolean enqueued = new AtomicBoolean();
 
+    @SuppressWarnings({"unused", "FieldCanBeLocal"})
     @Inject
     private GlobalBlockQueue blockQueue;
 

Core/src/main/java/com/plotsquared/core/synchronization/LockRepository.java

@@ -34,6 +34,7 @@ import java.util.function.Consumer;
 /**
  * A repository for keyed {@link java.util.concurrent.locks.Lock locks}
  */
+@SuppressWarnings("UnstableApiUsage")
 public final class LockRepository {
 
     private final Striped<Lock> striped;

Core/src/main/java/com/plotsquared/core/util/BlockUtil.java

@@ -90,7 +90,7 @@ public final class BlockUtil {
         if (id.length() == 1 && id.charAt(0) == '*') {
             return FuzzyBlockState.builder().type(BlockTypes.AIR).build();
         }
-        String mutableId = id;
+        String mutableId;
         mutableId = id.toLowerCase();
         BlockType type = BlockTypes.get(mutableId);
         if (type != null) {

Core/src/main/java/com/plotsquared/core/util/EntityUtil.java

@@ -73,6 +73,7 @@ public class EntityUtil {
         return i;
     }
 
+    @SuppressWarnings("unchecked")
     public static boolean checkEntity(Plot plot, PlotFlag<Integer, ?>... flags) {
         if (Settings.Done.RESTRICT_BUILDING && DoneFlag.isDone(plot)) {
             return true;

Core/src/main/java/com/plotsquared/core/util/RegionManager.java

@@ -289,7 +289,7 @@ public abstract class RegionManager {
                 true
         );
 
-        toQueue2.setCompleteTask(whenDone::run);
+        toQueue2.setCompleteTask(whenDone);
         if (actor != null && Settings.QUEUE.NOTIFY_PROGRESS) {
             toQueue2.addProgressSubscriber(subscriberFactory.createFull(
                     actor,

Core/src/main/java/com/plotsquared/core/util/StringComparison.java

@@ -59,6 +59,7 @@ public class StringComparison<T> {
         this(input, objects, Object::toString);
     }
 
+    @SuppressWarnings("unchecked")
     public StringComparison(String input, Collection<T> objects, Function<T, String> toString) {
         this(input, (T[]) objects.toArray(), toString);
     }

Core/src/main/java/com/plotsquared/core/util/StringMan.java

@@ -30,16 +30,21 @@ import com.plotsquared.core.configuration.caption.Caption;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
 import java.lang.reflect.Array;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Comparator;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
+import java.util.regex.Pattern;
 
 public class StringMan {
 
+    private static final Pattern STRING_SPLIT_PATTERN = Pattern.compile("(?<quoted>\"[\\w ]+\")|(?<single>\\w+)");
+
     public static String replaceFromMap(String string, Map<String, String> replacements) {
         StringBuilder sb = new StringBuilder(string);
         int size = string.length();
@@ -286,7 +291,7 @@ public class StringMan {
     }
 
     public static boolean isEqualIgnoreCase(String a, String b) {
-        return (a.equals(b)) || ((a != null) && (b != null) && (a.length() == b.length()) && a
+        return a.equals(b) || ((a != null) && (b != null) && (a.length() == b.length()) && a
                 .equalsIgnoreCase(b));
     }
 
@@ -320,4 +325,46 @@ public class StringMan {
         return col;
     }
 
+    /**
+     * @param message an input string
+     * @return a list of strings
+     * @since TODO
+     *
+     *         <table border="1">
+     *         <caption>Converts multiple quoted and single strings into a list of strings</caption>
+     *         <thead>
+     *           <tr>
+     *             <th>Input</th>
+     *             <th>Output</th>
+     *           </tr>
+     *         </thead>
+     *         <tbody>
+     *           <tr>
+     *             <td>title "sub title"</td>
+     *             <td>["title", "sub title"]</td>
+     *           </tr>
+     *           <tr>
+     *             <td>"a title" subtitle</td>
+     *             <td>["a title", "subtitle"]</td>
+     *           </tr>
+     *           <tr>
+     *             <td>"title" "subtitle"</td>
+     *             <td>["title", "subtitle"]</td>
+     *           </tr>
+     *           <tr>
+     *             <td>"PlotSquared is going well" the authors "and many contributors"</td>
+     *             <td>["PlotSquared is going well", "the", "authors", "and many contributors"]</td>
+     *           </tr>
+     *         </tbody>
+     *         </table>
+     */
+    public static @NonNull List<String> splitMessage(@NonNull String message) {
+        var matcher = StringMan.STRING_SPLIT_PATTERN.matcher(message);
+        List<String> splitMessages = new ArrayList<>();
+        while (matcher.find()) {
+            splitMessages.add(matcher.group(0).replaceAll("\"", ""));
+        }
+        return splitMessages;
+    }
+
 }

Core/src/main/java/com/plotsquared/core/util/TabCompletions.java

@@ -265,6 +265,7 @@ public final class TabCompletions {
      * @return List of completions
      * @deprecated In favor {@link #completePlayers(String, PlotPlayer, String, List, Predicate)}
      */
+    @SuppressWarnings("unused")
     @Deprecated(forRemoval = true)
     private static List<Command> completePlayers(
             final @NonNull String cacheIdentifier,

Core/src/main/java/com/plotsquared/core/util/WEManager.java

@@ -109,7 +109,7 @@ public class WEManager {
                 plot = metaDataAccess.get().orElse(null);
             }
             if (plot != null && (!Settings.Done.RESTRICT_BUILDING || !DoneFlag.isDone(plot)) && (
-                    (allowMember && plot.isAdded(uuid)) || (!allowMember && (plot.isOwner(uuid)) || plot
+                    (allowMember && plot.isAdded(uuid)) || (!allowMember && plot.isOwner(uuid) || plot
                             .getTrusted().contains(uuid))) && !plot.getFlag(NoWorldeditFlag.class)) {
                 for (CuboidRegion region : plot.getRegions()) {
                     BlockVector3 pos1 = region.getMinimumPoint().withY(area.getMinBuildHeight());

Core/src/test/java/com/plotsquared/core/plot/FlagTest.java

@@ -25,9 +25,12 @@
  */
 package com.plotsquared.core.plot;
 
+import com.plotsquared.core.configuration.caption.TranslatableCaption;
 import com.plotsquared.core.database.AbstractDBTest;
 import com.plotsquared.core.database.DBFunc;
+import com.plotsquared.core.plot.flag.FlagParseException;
 import com.plotsquared.core.plot.flag.PlotFlag;
+import com.plotsquared.core.plot.flag.implementations.PlotTitleFlag;
 import com.plotsquared.core.plot.flag.implementations.UseFlag;
 import com.sk89q.worldedit.world.item.ItemType;
 import org.apache.logging.log4j.LogManager;
@@ -74,4 +77,62 @@ public class FlagTest {
         Assertions.assertEquals("use", flagName);
     }
 
+    @Test
+    public void shouldSuccessfullyParseTitleFlagWithTitleSingularAndSubTitleEmpty() {
+        Assertions.assertDoesNotThrow(() -> {
+            var title = PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("\"test\" \"\"").getValue();
+            Assertions.assertEquals("test", title.title());
+            Assertions.assertEquals("", title.subtitle());
+        }, "Should not throw a FlagParseException");
+    }
+
+    @Test
+    public void shouldSuccessfullyParseTitleFlagWithTitleMultipleWordsAndSubTitleEmpty() {
+        Assertions.assertDoesNotThrow(() -> {
+            var title = PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("\"test hello test\" \"\"").getValue();
+            Assertions.assertEquals("test hello test", title.title());
+            Assertions.assertEquals("", title.subtitle());
+        }, "Should not throw a FlagParseException");
+    }
+
+    @Test
+    public void shouldSuccessfullyParseTitleFlagWithTitleMultipleWordsAndSubTitleMultipleWords() {
+        Assertions.assertDoesNotThrow(() -> {
+            var title = PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("\"test hello test\" \"a very long subtitle\"").getValue();
+            Assertions.assertEquals("test hello test", title.title());
+            Assertions.assertEquals("a very long subtitle", title.subtitle());
+        }, "Should not throw a FlagParseException");
+    }
+
+    @Test
+    public void shouldSuccessfullyParseTitleFlagWithTitleEmptyAndSubTitleSingleWord() {
+        Assertions.assertDoesNotThrow(() -> {
+            var title = PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("\"\" \"single\"").getValue();
+            Assertions.assertEquals(" ", title.title());
+            Assertions.assertEquals("single", title.subtitle());
+        }, "Should not throw a FlagParseException");
+    }
+
+    @Test
+    public void shouldExtractTitleWhenASingleDoubleQuoteAtEndOfTitle() {
+        Assertions.assertDoesNotThrow(() -> {
+            var plotTitle = PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("title\"").getValue();
+            Assertions.assertEquals("title", plotTitle.title());
+            Assertions.assertEquals("", plotTitle.subtitle());
+        }, "Should not throw a FlagParseException");
+    }
+
+    @Test
+    public void shouldThrowFlagParseExceptionWithQuotesGreater4() {
+        var exception = Assertions.assertThrows(
+                FlagParseException.class,
+                () -> PlotTitleFlag.TITLE_FLAG_DEFAULT.parse("\"title\" \"subtitle\" \"more\""),
+                "Needs to throw a FlagParseException"
+        );
+        Assertions.assertTrue(exception.getErrorMessage() instanceof TranslatableCaption);
+        Assertions.assertEquals(
+                "flags.flag_error_title",
+                ((TranslatableCaption) exception.getErrorMessage()).getKey()
+        );
+    }
 }

Core/src/test/java/com/plotsquared/core/util/StringManTest.java

@@ -0,0 +1,61 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            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.util;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+public class StringManTest {
+
+    @Test
+    public void ensureThatAllVariationsHasTheExpectedOutcome() {
+
+        List<Message> messages = List.of(
+                new Message("title", List.of("title")),
+                new Message("title \"sub title\"", List.of("title", "sub title")),
+                new Message("\"a title\" subtitle", List.of("a title", "subtitle")),
+                new Message("\"title\" \"subtitle\"", List.of("title", "subtitle"))
+        );
+
+        for (Message message : messages) {
+            var messageList = StringMan.splitMessage(message.input);
+
+            Assertions.assertEquals(message.expected.size(), messageList.size());
+            if (message.expected.size() > 0) {
+                Assertions.assertEquals(message.expected.get(0), messageList.get(0));
+            }
+            if (message.expected.size() > 1) {
+                Assertions.assertEquals(message.expected.get(1), messageList.get(1));
+            }
+        }
+    }
+
+    private record Message(String input, List<String> expected) {
+
+    }
+}

build.gradle.kts

@@ -77,7 +77,7 @@ allprojects {
     }
 
     tasks.compileJava.configure {
-        options.release.set(16)
+        options.release.set(17)
     }
 
     configurations.all {