style(*): add this qualifier

api/src/main/java/net/okocraft/box/api/command/AbstractCommand.java

@@ -47,15 +47,15 @@ public AbstractCommand(@NotNull String name, @NotNull String permissionNode, @No
     }
 
     public @NotNull String getName() {
-        return name;
+        return this.name;
     }
 
     public @NotNull String getPermissionNode() {
-        return permissionNode;
+        return this.permissionNode;
     }
 
     public @NotNull @Unmodifiable Set<String> getAliases() {
-        return aliases;
+        return this.aliases;
     }
 
     public @NotNull List<String> onTabComplete(@NotNull CommandSender sender, @NotNull String[] args) {

api/src/main/java/net/okocraft/box/api/command/SubCommandHoldable.java

@@ -48,7 +48,7 @@ public SubCommandHolder(@NotNull Command... subCommands) {
          * @return the list of subcommands
          */
         public @NotNull @Unmodifiable List<Command> getSubCommands() {
-            return subCommands;
+            return this.subCommands;
         }
 
         /**
@@ -57,7 +57,7 @@ public SubCommandHolder(@NotNull Command... subCommands) {
          * @param subCommand the new subcommand
          */
         public void register(@NotNull Command subCommand) {
-            subCommands.add(subCommand);
+            this.subCommands.add(subCommand);
         }
 
         /**
@@ -66,7 +66,7 @@ public void register(@NotNull Command subCommand) {
          * @param subCommand the subcommand to unregister
          */
         public void unregister(@NotNull Command subCommand) {
-            subCommands.remove(subCommand);
+            this.subCommands.remove(subCommand);
         }
 
         /**
@@ -78,7 +78,7 @@ public void unregister(@NotNull Command subCommand) {
         public @NotNull Optional<Command> search(@NotNull String name) {
             name = Objects.requireNonNull(name).toLowerCase(Locale.ROOT);
 
-            for (var subCommand : subCommands) {
+            for (var subCommand : this.subCommands) {
                 if (subCommand.getName().equals(name) || subCommand.getAliases().contains(name)) {
                     return Optional.of(subCommand);
                 }

api/src/main/java/net/okocraft/box/api/event/feature/FeatureEvent.java

@@ -40,7 +40,7 @@ public FeatureEvent(@NotNull BoxFeature feature, @NotNull Type type) {
      * @return the {@link Type} of this event
      */
     public @NotNull Type getType() {
-        return type;
+        return this.type;
     }
 
     @Override

api/src/main/java/net/okocraft/box/api/feature/AbstractBoxFeature.java

@@ -22,7 +22,7 @@ protected AbstractBoxFeature(@NotNull String name) {
 
     @Override
     public @NotNull String getName() {
-        return name;
+        return this.name;
     }
 
 }

api/src/main/java/net/okocraft/box/api/transaction/DepositAllImpl.java

@@ -53,13 +53,13 @@ record DepositAllImpl(@NotNull StockHolder stockHolder,
 
             var boxItem = itemManager.getBoxItem(item).orElse(null);
 
-            if (boxItem == null || (filter != null && !filter.test(boxItem)) || (view != null && !checkClickEvent(view, i))) {
+            if (boxItem == null || (this.filter != null && !this.filter.test(boxItem)) || (view != null && !checkClickEvent(view, i))) {
                 continue;
             }
 
             int itemAmount = item.getAmount();
 
-            stockHolder.increase(boxItem, itemAmount, cause);
+            this.stockHolder.increase(boxItem, itemAmount, cause);
             contents[i] = null;
 
             resultMap.mergeInt(boxItem, itemAmount, Integer::sum);

api/src/main/java/net/okocraft/box/api/transaction/DepositImpl.java

@@ -38,22 +38,22 @@ record DepositImpl(@NotNull StockHolder stockHolder, @NotNull BoxItem boxItem,
 
         int depositedAmount = 0;
 
-        for (int i = 0; i < contents.length && depositedAmount < limit; i++) {
+        for (int i = 0; i < contents.length && depositedAmount < this.limit; i++) {
             var item = contents[i];
 
-            if (item == null || !boxItem.getOriginal().isSimilar(item) || (view != null && !checkClickEvent(view, i))) {
+            if (item == null || !this.boxItem.getOriginal().isSimilar(item) || (view != null && !checkClickEvent(view, i))) {
                 continue;
             }
 
-            int remaining = limit - depositedAmount;
+            int remaining = this.limit - depositedAmount;
             int itemAmount = item.getAmount();
 
             if (itemAmount <= remaining) {
-                stockHolder.increase(boxItem, itemAmount, cause);
+                this.stockHolder.increase(this.boxItem, itemAmount, cause);
                 depositedAmount += itemAmount;
                 contents[i] = null;
             } else {
-                stockHolder.increase(boxItem, remaining, cause);
+                this.stockHolder.increase(this.boxItem, remaining, cause);
                 depositedAmount += remaining;
                 contents[i] = item.asQuantity(itemAmount - remaining);
             }

api/src/main/java/net/okocraft/box/api/transaction/StockHolderTransaction.java

@@ -45,7 +45,7 @@ private StockHolderTransaction(@NotNull StockHolder stockHolder) {
      * @throws NullPointerException if {@code item} is null
      */
     public @NotNull Deposit deposit(@NotNull BoxItem item, int limit) {
-        return new DepositImpl(stockHolder, Objects.requireNonNull(item), limit);
+        return new DepositImpl(this.stockHolder, Objects.requireNonNull(item), limit);
     }
 
     /**
@@ -54,7 +54,7 @@ private StockHolderTransaction(@NotNull StockHolder stockHolder) {
      * @return a {@link Deposit} instance
      */
     public @NotNull Deposit depositAll() {
-        return new DepositAllImpl(stockHolder, null);
+        return new DepositAllImpl(this.stockHolder, null);
     }
 
     /**
@@ -65,7 +65,7 @@ private StockHolderTransaction(@NotNull StockHolder stockHolder) {
      * @throws NullPointerException if {@code filter} is null
      */
     public @NotNull Deposit depositAll(@NotNull Predicate<BoxItem> filter) {
-        return new DepositAllImpl(stockHolder, Objects.requireNonNull(filter));
+        return new DepositAllImpl(this.stockHolder, Objects.requireNonNull(filter));
     }
 
     /**
@@ -77,7 +77,7 @@ private StockHolderTransaction(@NotNull StockHolder stockHolder) {
      * @throws NullPointerException if {@code item} is null
      */
     public @NotNull Withdrawal withdraw(@NotNull BoxItem item, int limit) {
-        return new WithdrawalImpl(stockHolder, Objects.requireNonNull(item), limit);
+        return new WithdrawalImpl(this.stockHolder, Objects.requireNonNull(item), limit);
     }
 
     /**

api/src/main/java/net/okocraft/box/api/transaction/TransactionResult.java

@@ -50,7 +50,7 @@ public record TransactionResult(@NotNull BoxItem item, int amount) {
      */
     @ApiStatus.Obsolete
     public @NotNull BoxItem getItem() {
-        return item;
+        return this.item;
     }
 
     /**
@@ -60,6 +60,6 @@ public record TransactionResult(@NotNull BoxItem item, int amount) {
      */
     @ApiStatus.Obsolete
     public int getAmount() {
-        return amount;
+        return this.amount;
     }
 }

api/src/main/java/net/okocraft/box/api/transaction/WithdrawalImpl.java

@@ -31,36 +31,36 @@ record WithdrawalImpl(@NotNull StockHolder stockHolder, @NotNull BoxItem boxItem
         Objects.requireNonNull(inventory);
         Objects.requireNonNull(cause);
 
-        int maxStackSize = boxItem.getOriginal().getMaxStackSize();
+        int maxStackSize = this.boxItem.getOriginal().getMaxStackSize();
         int withdrawnAmount = 0;
 
         var contents = inventory.getStorageContents();
 
-        for (int i = 0; i < contents.length && withdrawnAmount < limit; i++) {
+        for (int i = 0; i < contents.length && withdrawnAmount < this.limit; i++) {
             var item = contents[i];
 
             if (item == null) {
                 if (view != null && !checkClickEvent(view, i)) {
                     continue;
                 }
 
-                int withdrawn = stockHolder.decreaseToZero(boxItem, Math.min(limit - withdrawnAmount, maxStackSize), cause);
+                int withdrawn = this.stockHolder.decreaseToZero(this.boxItem, Math.min(this.limit - withdrawnAmount, maxStackSize), cause);
 
                 if (withdrawn < 1) {
                     break;
                 }
 
                 withdrawnAmount += withdrawn;
-                contents[i] = boxItem.getOriginal().asQuantity(withdrawn);
-            } else if (item.isSimilar(boxItem.getOriginal())) {
+                contents[i] = this.boxItem.getOriginal().asQuantity(withdrawn);
+            } else if (item.isSimilar(this.boxItem.getOriginal())) {
                 if (view != null && !checkClickEvent(view, i)) {
                     continue;
                 }
 
                 int remaining = maxStackSize - item.getAmount();
 
                 if (0 < remaining) {
-                    int withdrawn = stockHolder.decreaseToZero(boxItem, Math.min(limit - withdrawnAmount, remaining), cause);
+                    int withdrawn = this.stockHolder.decreaseToZero(this.boxItem, Math.min(this.limit - withdrawnAmount, remaining), cause);
 
                     if (withdrawn < 1) {
                         break;
@@ -76,7 +76,7 @@ record WithdrawalImpl(@NotNull StockHolder stockHolder, @NotNull BoxItem boxItem
             inventory.setStorageContents(contents);
         }
 
-        return TransactionResult.create(boxItem, withdrawnAmount);
+        return TransactionResult.create(this.boxItem, withdrawnAmount);
     }
 
     private static boolean checkClickEvent(@NotNull InventoryView view, int slot) {

bundle/src/main/java/net/okocraft/box/bootstrap/BoxBootstrapContext.java

@@ -54,12 +54,12 @@ public final class BoxBootstrapContext implements net.okocraft.box.api.bootstrap
 
     @Override
     public @NotNull Path getDataDirectory() {
-        return dataDirectory;
+        return this.dataDirectory;
     }
 
     @Override
     public @NotNull String getVersion() {
-        return version;
+        return this.version;
     }
 
     @Override
@@ -80,7 +80,7 @@ public final class BoxBootstrapContext implements net.okocraft.box.api.bootstrap
     }
 
     public @NotNull StorageRegistry getStorageRegistry() {
-        return storageRegistry;
+        return this.storageRegistry;
     }
 
     public @NotNull List<BoxFeature> getBoxFeatureList() {

core/src/main/java/net/okocraft/box/core/BoxCore.java

@@ -84,7 +84,7 @@ public boolean enable(@NotNull Storage storage) {
 
         BoxLogger.logger().info("Initializing managers...");
 
-        userManager = new BoxUserManager(storage.getUserStorage());
+        this.userManager = new BoxUserManager(storage.getUserStorage());
 
         try {
             var itemLoadResult = ItemLoader.load(storage.getItemStorage(), this.context.defaultItemProvider());
@@ -103,9 +103,9 @@ public boolean enable(@NotNull Storage storage) {
         this.playerMap = new BoxPlayerMapImpl(this.userManager, this.stockManager, this.context.eventManager(), this.context.scheduler(), this.context.messageProvider());
         this.playerMap.loadAll();
 
-        Bukkit.getPluginManager().registerEvents(new PlayerConnectionListener(this.playerMap), context.plugin());
+        Bukkit.getPluginManager().registerEvents(new PlayerConnectionListener(this.playerMap), this.context.plugin());
 
-        stockManager.schedulerAutoSaveTask(this.context.scheduler());
+        this.stockManager.schedulerAutoSaveTask(this.context.scheduler());
 
         BoxLogger.logger().info("Registering commands...");
 
@@ -121,11 +121,11 @@ public boolean enable(@NotNull Storage storage) {
     }
 
     public void disable() {
-        if (playerMap != null) {
-            playerMap.unloadAll();
+        if (this.playerMap != null) {
+            this.playerMap.unloadAll();
         }
 
-        stockManager.close();
+        this.stockManager.close();
 
         DebugListener.unregister(this.context.eventManager());
     }
@@ -190,7 +190,7 @@ public void accept(Supplier<Component> componentSupplier) {
 
     @Override
     public @NotNull Path getPluginDirectory() {
-        return context.dataDirectory();
+        return this.context.dataDirectory();
     }
 
     @Override
@@ -205,17 +205,17 @@ public void accept(Supplier<Component> componentSupplier) {
 
     @Override
     public @NotNull UserManager getUserManager() {
-        return userManager;
+        return this.userManager;
     }
 
     @Override
     public @NotNull ItemManager getItemManager() {
-        return itemManager;
+        return this.itemManager;
     }
 
     @Override
     public @NotNull StockManager getStockManager() {
-        return stockManager;
+        return this.stockManager;
     }
 
     @Override
@@ -235,17 +235,17 @@ public void accept(Supplier<Component> componentSupplier) {
 
     @Override
     public @NotNull BoxPlayerMap getBoxPlayerMap() {
-        return playerMap;
+        return this.playerMap;
     }
 
     @Override
     public @NotNull BoxCommand getBoxCommand() {
-        return boxCommand;
+        return this.boxCommand;
     }
 
     @Override
     public @NotNull BoxAdminCommand getBoxAdminCommand() {
-        return boxAdminCommand;
+        return this.boxAdminCommand;
     }
 
     public void initializeFeatures(@NotNull List<BoxFeature> features) {

core/src/main/java/net/okocraft/box/core/command/BaseCommand.java

@@ -45,7 +45,7 @@ public void onCommand(@NotNull CommandSender sender, @NotNull String[] args) {
         }
 
         if (args.length == 0) {
-            if (commandOfNoArgument != null && sender.hasPermission(commandOfNoArgument.getPermissionNode())) {
+            if (this.commandOfNoArgument != null && sender.hasPermission(this.commandOfNoArgument.getPermissionNode())) {
                 this.scheduler.runAsyncTask(() -> this.commandOfNoArgument.onCommand(sender, args));
             } else {
                 ErrorMessages.NOT_ENOUGH_ARGUMENT.source(source).send(sender);
@@ -54,7 +54,7 @@ public void onCommand(@NotNull CommandSender sender, @NotNull String[] args) {
             return;
         }
 
-        var optionalSubCommand = subCommandHolder.search(args[0]);
+        var optionalSubCommand = this.subCommandHolder.search(args[0]);
 
         if (optionalSubCommand.isEmpty()) {
             if (!args[0].equalsIgnoreCase("help")) {
@@ -89,22 +89,22 @@ public void onCommand(@NotNull CommandSender sender, @NotNull String[] args) {
         }
 
         if (args.length == 1) {
-            return subCommandHolder.getSubCommands().stream()
+            return this.subCommandHolder.getSubCommands().stream()
                     .filter(cmd -> sender.hasPermission(cmd.getPermissionNode()))
                     .map(Command::getName)
                     .filter(cmdName -> cmdName.startsWith(args[0].toLowerCase(Locale.ROOT)))
                     .toList();
         }
 
-        return subCommandHolder.search(args[0])
+        return this.subCommandHolder.search(args[0])
                 .filter(cmd -> sender.hasPermission(cmd.getPermissionNode()))
                 .map(cmd -> cmd.onTabComplete(sender, args))
                 .orElse(Collections.emptyList());
     }
 
     @Override
     public @NotNull SubCommandHolder getSubCommandHolder() {
-        return subCommandHolder;
+        return this.subCommandHolder;
     }
 
     @Override
@@ -113,7 +113,7 @@ public void onCommand(@NotNull CommandSender sender, @NotNull String[] args) {
     }
 
     public void changeNoArgumentCommand(@Nullable Command command) {
-        commandOfNoArgument = command;
+        this.commandOfNoArgument = command;
     }
 
     @EventHandler

core/src/main/java/net/okocraft/box/core/listener/PlayerConnectionListener.java

@@ -17,11 +17,11 @@ public PlayerConnectionListener(@NotNull BoxPlayerMapImpl playerMap) {
 
     @EventHandler
     public void onJoin(@NotNull PlayerJoinEvent event) {
-        playerMap.scheduleLoadingData(event.getPlayer());
+        this.playerMap.scheduleLoadingData(event.getPlayer());
     }
 
     @EventHandler
     public void onQuit(@NotNull PlayerQuitEvent event) {
-        playerMap.unload(event.getPlayer());
+        this.playerMap.unload(event.getPlayer());
     }
 }