gistfile1.txt

public CommandResult execute(CommandSource src, CommandContext args) throws CommandException {
        if (!(src instanceof Player)) {
            src.sendMessage(Text.of(COMMAND_PREFIX + I18nSupport.getInternationalisedString("Command - Must be player")));
            return CommandResult.empty();
        }
        String arg = args.<String>getOne(Text.of()).get();
        final Player player = (Player) src;
        @NotNull final WorldEditHandler weHandler = StructureBoxes.getInstance().getWorldEditHandler();
        @Nullable Clipboard clipboard = weHandler.loadClipboardFromSchematic(StructureBoxes.getInstance().getWorldEditPlugin().getWorld(player.getLocation().getExtent()), arg);
        if (clipboard == null) {
            player.sendMessage(Text.of(COMMAND_PREFIX + I18nSupport.getInternationalisedString("Command - No schematic")));
            return CommandResult.empty();
        }
        if (Settings.MaxStructureSize > -1 && weHandler.getStructureSize(clipboard) > Settings.MaxStructureSize) {
            player.sendMessage(Text.of(COMMAND_PREFIX + I18nSupport.getInternationalisedString("Command - Structure too large")));
            return CommandResult.empty();
        }

        Inventory emptySlots = player.getInventory().query(QueryOperationTypes.ITEM_TYPE.of(ItemTypes.AIR));
        if (emptySlots.size() <= 0) {
            player.sendMessage(Text.of(COMMAND_PREFIX + I18nSupport.getInternationalisedString("Command - Insufficient inventory space")));
            return CommandResult.empty();
        }
        return CommandResult.success();
    }