public static char binaryBeMsb0ToHexDigit()

in src/main/java/org/apache/commons/lang3/Conversion.java [439:471]
33 lines of code
31 McCabe index (conditional complexity)

    public static char binaryBeMsb0ToHexDigit(boolean[] src, int srcPos) {
        if (src.length == 0) {
            throw new IllegalArgumentException("Cannot convert an empty array.");
        }
        final int beSrcPos = src.length - 1 - srcPos;
        final int srcLen = Math.min(4, beSrcPos + 1);
        final boolean[] paddedSrc = new boolean[4];
        System.arraycopy(src, beSrcPos + 1 - srcLen, paddedSrc, 4 - srcLen, srcLen);
        src = paddedSrc;
        srcPos = 0;
        if (src[srcPos]) {
            if (src.length > srcPos + 1 && src[srcPos + 1]) {
                if (src.length > srcPos + 2 && src[srcPos + 2]) {
                    return src.length > srcPos + 3 && src[srcPos + 3] ? 'f' : 'e';
                }
                return src.length > srcPos + 3 && src[srcPos + 3] ? 'd' : 'c';
            }
            if (src.length > srcPos + 2 && src[srcPos + 2]) {
                return src.length > srcPos + 3 && src[srcPos + 3] ? 'b' : 'a';
            }
            return src.length > srcPos + 3 && src[srcPos + 3] ? '9' : '8';
        }
        if (src.length > srcPos + 1 && src[srcPos + 1]) {
            if (src.length > srcPos + 2 && src[srcPos + 2]) {
                return src.length > srcPos + 3 && src[srcPos + 3] ? '7' : '6';
            }
            return src.length > srcPos + 3 && src[srcPos + 3] ? '5' : '4';
        }
        if (src.length > srcPos + 2 && src[srcPos + 2]) {
            return src.length > srcPos + 3 && src[srcPos + 3] ? '3' : '2';
        }
        return src.length > srcPos + 3 && src[srcPos + 3] ? '1' : '0';
    }