Pure Java alternative to JAI ImageIO for detecting CMYK images

Question

first I\'d like to explain the situation/requirements that lead to the question:

In our web application we can\'t support CMYK images (JPEG) since IE 8 and below can

Answer 1

Beware of another post as the Java 7 does not allow to use directly Sun's implementation without special parameters as indicated in import com.sun.image.codec.jpeg.*.