private int getSrcCSType(ColorModel cm) {
...
            switch (cs.getType()) {
...
            case ColorSpace.TYPE_3CLR:
                if (cs == JPEG.JCS.getYCC()) {
...
                }
            case ColorSpace.TYPE_CMYK:
                retval = JPEG.JCS_CMYK;
                break;
...

YCC* images types are overwritten when one case falls through to the next.