public void printDecimal()

in src/com/amazon/ion/impl/_Private_IonTextAppender.java [719:798]
67 lines of code
10 McCabe index (conditional complexity)

    public void printDecimal(_Private_IonTextWriterBuilder _options,
                             BigDecimal                    value)
        throws IOException
    {
        if (value == null)
        {
            appendAscii("null.decimal");
            return;
        }

        BigInteger unscaled = value.unscaledValue();

        int signum = value.signum();
        if (signum < 0)
        {
            appendAscii('-');
            unscaled = unscaled.negate();
        }
        else if (value instanceof Decimal
             && ((Decimal)value).isNegativeZero())
        {
            // for the various forms of negative zero we have to
            // write the sign ourselves, since neither BigInteger
            // nor BigDecimal recognize negative zero, but Ion does.
            appendAscii('-');
        }

        final String unscaledText = unscaled.toString();
        final int significantDigits = unscaledText.length();

        final int scale = value.scale();
        final int exponent = -scale;

        if (_options._decimal_as_float)
        {
            appendAscii(unscaledText);
            appendAscii('e');
            appendAscii(Integer.toString(exponent));
        }
        else if (exponent == 0)
        {
            appendAscii(unscaledText);
            appendAscii('.');
        }
        else if (exponent < 0)
        {
            // Avoid printing small negative exponents using a heuristic
            // adapted from http://speleotrove.com/decimal/daconvs.html

            final int adjustedExponent = significantDigits - 1 - scale;
            if (adjustedExponent >= 0)
            {
                int wholeDigits = significantDigits - scale;
                appendAscii(unscaledText, 0, wholeDigits);
                appendAscii('.');
                appendAscii(unscaledText, wholeDigits,
                                    significantDigits);
            }
            else if (adjustedExponent >= -6)
            {
                appendAscii("0.");
                appendAscii("00000", 0, scale - significantDigits);
                appendAscii(unscaledText);
            }
            else
            {
                appendAscii(unscaledText);
                appendAscii("d-");
                appendAscii(Integer.toString(scale));
            }
        }
        else // (exponent > 0)
        {
            // We cannot move the decimal point to the right, adding
            // rightmost zeros, because that would alter the precision.
            appendAscii(unscaledText);
            appendAscii('d');
            appendAscii(Integer.toString(exponent));
        }
    }