/// <summary>
/// Try to get the AI at the current position
/// </summary>
/// <param name="data">The row data from the scanner</param>
/// <param name="index">The refrence of the current position</param>
/// <param name="usePlaceHolder">Sets if the last character of the AI should replaced with a placehoder ("d")</param>
/// <returns>The current AI or null if no match was found</returns>
private GS1BarcodeItem GetAi(string data, ref int index, bool usePlaceHolder = false)
{
if (data.Length < _minLengthOfAi)
{
return(null);
}
IGS1Item result = null;
// Step through the different lenghts of the AIs
for (int i = _minLengthOfAi; i <= _maxLengthOfAi; i++)
{
// get the AI sub string
string ai;
try
{
ai = data.Substring(index, i);
}
catch (Exception ex)
{
var appException = new ApplicationException("AI substring failed, see inner exception", ex);
appException.Data.Add("data", data);
appException.Data.Add("index", index);
appException.Data.Add("i", i);
throw appException;
}
if (usePlaceHolder)
{
try
{
ai = ai.Remove(ai.Length - 1) + "d";
}
catch (ArgumentOutOfRangeException argException)
{
//NOTE: if it fails maybe ignore and break out of the for loop since this GS1.AI doesn't exist?
throw new ArgumentOutOfRangeException($"AI Remove threw an exception with placeholder: {ai}{Environment.NewLine}Data: {data}", argException);
}
}
if (ApplicationItemDictionary.TryGetValue(ai, out result))
{
index += i;
return((GS1BarcodeItem)result);
}
// if no AI found, try it with the next length
}
// if no AI found here, than try it with placeholders. Assumed that is the first sep where usePlaceHolder is false
if (!usePlaceHolder)
{
result = GetAi(data, ref index, true);
}
return((GS1BarcodeItem)result);
}
public bool Contains(IGS1Item item)
{
return(Contains(item.Id));
}
internal void Add(IGS1Item segment)
{
Segments.Add(segment);
}
