return obj == null ? null : new String(Base64.decodeBase64((byte[])obj));
return obj == null ? null : new String(Base64.encodeBase64((byte[])obj));
    public String convertToString(Object obj, int sqlTypeCode) throws ConversionException    {        try        {            return obj == null ? null : new String(Base64.decodeBase64((byte[])obj));        }        catch (Exception ex)        {            throw new ConversionException(ex);        }    }