@Override
    public boolean execute(CommandSender sender, String currentAlias, String[] args) {
        if (!testPermission(sender)) return true;
        if ((args.length < 2) || (args.length > 4)) {
            sender.sendMessage(ChatColor.RED + "Usage: " + usageMessage);
            return false;
        }
        if (args.length < 2 || args.length > 4) return false;

        String usage = "";
        try {
            // Extract player
            Player player = Bukkit.getPlayerExact(args[0]);
            Validate.notNull(player, "Player not found");

            // Extract item
            int colon = args[1].indexOf(':');
            String type = colon > 0 ? args[1].substring(0, colon) : args[1];
            Material mat = Material.getMaterial(type);
            Validate.notNull(mat, "Invalid id");

            int data = 0;

            // Extract possible data
            if (args[1].length() > 3 && colon > 0) {
                data = Integer.parseInt(args[1].substring(colon + 1));
            }

            // Extract amount
            int amount = 1;
            if (args.length > 2) {
                try {
                    amount = Integer.parseInt(args[2]);
                } catch (NumberFormatException e) {
                    // keep as is
                }
            }

            // Extract data
            if (args.length > 3) {
                try {
                    data = Integer.parseInt(args[3]);
                } catch (NumberFormatException e) {
                    // keep as is
                }
            }
        } catch (NumberFormatException e) {
            usage = e.getMessage();
        } catch (IllegalArgumentException e) {
            usage = e.getMessage();
        } finally {
            if (!"".equals(usage)) {
                sender.sendMessage(usage);
                return false;
            }
        }
        return true;
    }