/// <summary>
/// Get the current code to the AI
/// </summary>
/// <param name="barcodeString">The row data from the scanner</param>
/// <param name="ai">The current AI</param>
/// <param name="index">The refrence of the current position</param>
/// <returns>the data to the current AI</returns>
private string GetCode(string barcodeString, GS1BarcodeItem ai, ref int index)
{
// get the max lenght to read.
int lenghtToRead = Math.Min(ai.LengthOfData, barcodeString.Length - index);
string data;
try
{
// get the data of the current AI
data = barcodeString.Substring(index, lenghtToRead);
}
catch (Exception ex)
{
var appException = new ApplicationException("Data for AI substring failed, see inner exception", ex);
appException.Data.Add("barcodeString", barcodeString);
appException.Data.Add("index", index);
appException.Data.Add("lenghtToRead", lenghtToRead);
throw appException;
}
// check if the AI support a group seperator
if (ai.Fnc1)
{
// try to find the index of the group seperator
int indexOfGroupTermination = data.IndexOf(GroupSeparator);
if (indexOfGroupTermination >= 0)
{
lenghtToRead = indexOfGroupTermination + 1;
}
try
{
// get the data of the current AI till the gorup seperator
data = barcodeString.Substring(index, lenghtToRead);
}
catch (Exception ex)
{
var appException = new ApplicationException("Data for AI substring failed, see inner exception", ex);
appException.Data.Add("barcodeString", barcodeString);
appException.Data.Add("index", index);
appException.Data.Add("lenghtToRead", lenghtToRead);
throw appException;
}
if (data.Contains(GroupSeparator.ToString()))
{
data = data.Remove(data.IndexOf(GroupSeparator), 1);
}
}
// Shift the index to the next
index += lenghtToRead;
return(data);
}
public GS1BarcodeParser()
{
ApplicationItemDictionary = new SortedDictionary <string, IGS1Item>();
IList <IGS1Item> availableBarcodeItems = FindDerivedTypes(Assembly.GetAssembly(GetType()), typeof(GS1BarcodeItem));
foreach (IGS1Item gs1Item in availableBarcodeItems)
{
GS1BarcodeItem item = (GS1BarcodeItem)gs1Item;
ApplicationItemDictionary.Add(item.Id, item);
}
_minLengthOfAi = ApplicationItemDictionary.Values.Min(x => x.Id.Length);
_maxLengthOfAi = ApplicationItemDictionary.Values.Max(x => x.Id.Length);
}
public IList <IGS1Item> Parse(string data, bool throwException = false)
{
// cut off the EAN128 start code
if (data.StartsWith(Ean128StartCode))
{
data = data.Substring(Ean128StartCode.Length);
}
// cut off the check sum
if (HasCheckSum)
{
data = data.Substring(0, data.Length - 2);
}
IList <IGS1Item> gs1List = new List <IGS1Item>();
int index = 0;
// walkk through the EAN128 code
while (index < data.Length)
{
// try to get the AI at the current position
GS1BarcodeItem ai = GetAi(data, ref index);
if (ai == null)
{
if (throwException)
{
throw new InvalidOperationException("AI not found");
}
return(gs1List);
}
// get the data to the current AI
string code = GetCode(data, ai, ref index);
ai.Value = code;
gs1List.Add(ai);
//result[ai] = code;
}
return(gs1List);
}
