public abstract ResponseType writeResponse()

in aws-serverless-java-container-core/src/main/java/com/amazonaws/serverless/proxy/ResponseWriter.java [44:90]

34 lines of code
11 McCabe index (conditional complexity)


    public abstract ResponseType writeResponse(ContainerResponseType containerResponse, Context lambdaContext)
            throws InvalidResponseObjectException;

    /**
     * Checks whether the given byte array contains a UTF-8 encoded string
     * @param input The byte[] to check against
     * @return true if the contend is valid UTF-8, false otherwise
     */
    @SuppressFBWarnings("NS_NON_SHORT_CIRCUIT")
    protected boolean isValidUtf8(final byte[] input) {
        int i = 0;
        // Check for BOM
        if (input.length >= 3 && (input[0] & 0xFF) == 0xEF
                && (input[1] & 0xFF) == 0xBB & (input[2] & 0xFF) == 0xBF) {
            i = 3;
        }

        int end;
        for (int j = input.length; i < j; ++i) {
            int octet = input[i];
            if ((octet & 0x80) == 0) {
                continue; // ASCII
            }

            // Check for UTF-8 leading byte
            if ((octet & 0xE0) == 0xC0) {
                end = i + 1;
            } else if ((octet & 0xF0) == 0xE0) {
                end = i + 2;
            } else if ((octet & 0xF8) == 0xF0) {
                end = i + 3;
            } else {
                // Java only supports BMP so 3 is max
                return false;
            }

            while (i < end) {
                i++;
                octet = input[i];
                if ((octet & 0xC0) != 0x80) {
                    // Not a valid trailing byte
                    return false;
                }
            }
        }
        return true;
    }