public static String decode()

in computer-api/src/main/java/org/apache/hugegraph/computer/core/util/CoderUtil.java [82:156]
67 lines of code
20 McCabe index (conditional complexity)

    public static String decode(byte[] bytes, int start, int length) {
        // Note that this code is mostly copied from DataInputStream
        char[] chars = new char[length];
        int c;
        int char2;
        int char3;
        int count = start;
        int charIndex = 0;

        while (count < length) {
            c = (int) bytes[count] & 0xff;
            if (c > 127) {
                break;
            }
            count++;
            chars[charIndex++] = (char) c;
        }

        while (count < length) {
            c = (int) bytes[count] & 0xff;
            switch (c >> 4) {
                case 0:
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                case 7:
                    // 0xxxxxxx
                    count++;
                    chars[charIndex++] = (char) c;
                    break;
                case 12:
                case 13:
                    // 110x xxxx   10xx xxxx
                    count += 2;
                    if (count > length) {
                        throw new ComputerException(
                                  "Malformed input: partial character at end");
                    }
                    char2 = (int) bytes[count - 1];
                    if ((char2 & 0xC0) != 0x80) {
                        throw new ComputerException(
                                  "Malformed input around byte " + count);
                    }
                    chars[charIndex++] = (char) (((c & 0x1F) << 6) |
                                                 (char2 & 0x3F));
                    break;
                case 14:
                    // 1110 xxxx  10xx xxxx  10xx xxxx
                    count += 3;
                    if (count > length) {
                        throw new ComputerException(
                                  "Malformed input: partial character at end");
                    }
                    char2 = bytes[count - 2];
                    char3 = bytes[count - 1];
                    if (((char2 & 0xC0) != 0x80) || ((char3 & 0xC0) != 0x80)) {
                        throw new ComputerException(
                                  "Malformed input around byte " + (count - 1));
                    }
                    chars[charIndex++] = (char) (((c & 0x0F) << 12) |
                                                 ((char2 & 0x3F) << 6) |
                                                 ((char3 & 0x3F) << 0));
                    break;
                default:
                    // 10xx xxxx,  1111 xxxx
                    throw new ComputerException(
                              "Malformed input around byte " + count);
            }
        }
        // The number of chars produced may be less than len
        return new String(chars, 0, charIndex);
    }