/// <summary>
/// Builds Byte[] from Instance of Message
/// </summary>
/// <typeparam name="TMessage">TMessage class, a derived class of BaseMessage class</typeparam>
/// <param name="message">message instance</param>
/// <param name="MTI">MTI Response value</param>
/// <param name="notIncludeFields">whether the BitMap will Contain Fields without values</param>
/// <returns>byte array Iso Message</returns>
public byte[] Build <TMessage>(TMessage message, string MTI, params IsoFields[] notIncludeFields) where TMessage : BaseMessage, new()
{
IEnumerable <int> orderedFieldPositions = message.MessagePropsIsoFieldAttributes.Select(c => (int)c.Value.Position);
IsoFieldAttribute mtiIsoField = message.GetIsoFieldByPropName(nameof(message.MTI));
var mtiBytes = mtiIsoField.BuildFieldValue(MTI);
var messageBytes = new List <byte>(mtiBytes);
IEnumerable <int> fieldsForBitMap = orderedFieldPositions.Where(pos => !notIncludeFields.Contains((IsoFields)pos));
messageBytes.AddRange(BuildBitMap(message, fieldsForBitMap));
IEnumerable <int> fieldsToBuild = fieldsForBitMap.Where(pos => pos != (int)IsoFields.F1 && pos != (int)IsoFields.BitMap && pos != (int)IsoFields.MTI);
BuildFields(fieldsToBuild, message, ref messageBytes);
return(messageBytes.ToArray());
}
/// <summary>
/// Builds BitMap value of Message to Send
/// </summary>
/// <typeparam name="TMessage">TMessage class, a derived class of BaseMessage class</typeparam>
/// <param name="message">message instance</param>
/// <param name="orderedFields">ordered fields positions</param>
/// <returns>byte array bitMap value</returns>
private byte[] BuildBitMap <TMessage>(TMessage message, IEnumerable <int> orderedFields) where TMessage : BaseMessage, new()
{
var secondBitRequired = orderedFields.Any(pos => pos > 65 && pos < 128);
IsoFieldAttribute bitMapIsoField = message.GetIsoFieldByPropName(nameof(BaseMessage.BitMap));
char[] bitmapBinaryArray = null;
if (secondBitRequired)
{
bitmapBinaryArray = new char[129];
bitmapBinaryArray[1] = '1';
}
else
{
bitmapBinaryArray = new char[65];
bitmapBinaryArray[1] = '0';
}
//Building BitMap
for (var i = 2; i < bitmapBinaryArray.Length; i++)
{
if (orderedFields.Contains(i))
{
bitmapBinaryArray[i] = '1';
}
else
{
bitmapBinaryArray[i] = '0';
}
}
var bitmapString = new string(bitmapBinaryArray);
var bitMap = Convert.ToInt64(bitmapString.Substring(1, 64), 2).ToString("X").PadLeft(16, '0');
if (secondBitRequired)
{
bitMap = bitMap + Convert.ToInt64(bitmapString.Substring(65, 64), 2).ToString("X").PadLeft(16, '0');
}
return(bitMapIsoField.BuildFieldValue(bitMap));
}
