UUIDs.java

    /**
     * Retrieve a UUID safely from a {@link String}.
     *
     * @param string The {@link String} to deserialize into an {@link UUID} object.
     * @return {@link Optional#empty()} if the provided {@link String} is illegal, otherwise an {@link Optional}
     * containing the deserialized {@link UUID} object.
     */
    public static Optional<UUID> getUUID(String string) {
        if (string.contains("-")) {
            try {
                return Optional.of(UUID.fromString(string));
            } catch (IllegalArgumentException exc) {
                return Optional.empty();
            }
        }

        String builder = string.substring(0, 8) + "-"
                + string.substring(8, 12) + "-"
                + string.substring(12, 16) + "-"
                + string.substring(16, 20) + "-"
                + string.substring(20, 32);

        return Optional.of(UUID.fromString(builder));
    }