public static char binaryBeMsb0ToHexDigit()

in src/main/java/org/apache/commons/lang3/Conversion.java [429:462]

• 31 lines of code
• 21 McCabe index (conditional complexity)

    public static char binaryBeMsb0ToHexDigit(final boolean[] src, final int srcPos) {
        // JDK 9: Objects.checkIndex(int index, int length)
        if (Integer.compareUnsigned(srcPos, src.length) >= 0) {
            // Throw the correct exception
            if (src.length == 0) {
                throw new IllegalArgumentException("Cannot convert an empty array.");
            }
            throw new IndexOutOfBoundsException(srcPos + " is not within array length " + src.length);
        }
        // Little-endian bit 0 position
        final int pos = src.length - 1 - srcPos;
        if (3 <= pos && src[pos - 3]) {
            if (src[pos - 2]) {
                if (src[pos - 1]) {
                    return src[pos] ? 'f' : 'e';
                }
                return src[pos] ? 'd' : 'c';
            }
            if (src[pos - 1]) {
                return src[pos] ? 'b' : 'a';
            }
            return src[pos] ? '9' : '8';
        }
        if (2 <= pos && src[pos - 2]) {
            if (src[pos - 1]) {
                return src[pos] ? '7' : '6';
            }
            return src[pos] ? '5' : '4';
        }
        if (1 <= pos && src[pos - 1]) {
            return src[pos] ? '3' : '2';
        }
        return src[pos] ? '1' : '0';
    }