public static BaseProduct input(Class<? extends BaseProduct> productClass, InputStream in) throws IOException {
    DataInputStream dataInputStream = new DataInputStream(in);
    String brand = dataInputStream.readUTF();
    String productName = dataInputStream.readUTF();
    BigDecimal price = new BigDecimal(dataInputStream.readUTF());
    int totalQuantity = dataInputStream.readInt();
    int defectiveQuantity = dataInputStream.readInt();
    List<Review> reviews = new ArrayList<>();
    for (Review review : reviews) {
        String userName = dataInputStream.readUTF();
        int rating = dataInputStream.readInt();
    }
    return createProductInstance(brand, productName, price, totalQuantity, defectiveQuantity, reviews, productClass);
}

private static BaseProduct createProductInstance(String brand, String productName, BigDecimal price, int totalQuantity, int defectiveQuantity, List<Review> reviews, Class<? extends BaseProduct> productClass) {
    try {
        Constructor<? extends BaseProduct> productConstructor = productClass.getConstructor(String.class, String.class, BigDecimal.class, int.class, int.class, List.class);
        return productConstructor.newInstance(brand, productName, price, totalQuantity, defectiveQuantity, reviews);
    } catch (NoSuchMethodException | IllegalAccessException | InstantiationException | InvocationTargetException e) {
        throw new IllegalArgumentException("Could not create product instance: " + e);
    }
}