private static void TraversAllSegments(Interchange interchange, IReadOnlyList<Segment> segments, Errors errors)
{
if (segments == null || segments.Count == 0)
{
errors.NewError("No segments provided for parsing.");
return;
}
Group currentGroup = null;
Document currentDocument = null;
if (
!errors.Assert(() => segments[0].Name == "ISA",
"FATAL Error: The first segment ('" + segments[0].Name + "') is not ISA segment."))
return; // FATAL error
interchange.ISASegment = new ISASegment(segments[0].Elements);
for (var i = 1; i < segments.Count; i++)
{
switch (segments[i].Name)
{
case "ST":
currentDocument = new Document();
currentDocument.STSegment = new STSegment(segments[i].Elements);
break;
case "SE":
if (currentDocument != null)
{
currentDocument.SESegment = new SESegment(segments[i].Elements);
if (currentGroup != null)
currentGroup.Documents.Add(currentDocument);
else
errors.NewError(string.Format("Segment:'{0}' placed before GS segment",
segments[i].AsString));
currentDocument = null;
}
else
errors.NewError(string.Format("Segment:'{0}' placed before ST segment", segments[i].AsString));
break;
case "GS":
currentGroup = new Group();
currentGroup.GSSegment = new GSSegment(segments[i].Elements);
break;
case "GE":
if (currentGroup != null)
{
currentGroup.GESegment = new GESegment(segments[i].Elements);
interchange.Groups.Add(currentGroup);
currentGroup = null;
}
else
errors.NewError(string.Format("Segment:'{0}' placed before GS segment", segments[i].AsString));
break;
case "IEA":
interchange.IEASegment = new IEASegment(segments[i].Elements);
break;
default:
if (currentDocument != null)
currentDocument.Segments.Add(segments[i]);
else
errors.NewError(string.Format("Segment:'{0}' placed before ST segment", segments[i].AsString));
break;
}
}
// Validate a new interchange:
interchange.Validate(errors);
}
private static Segment ParseSegment(string line, char dataElementSeparator, Errors errors)
{
var elements = line.Split(dataElementSeparator);
errors.Assert(() => elements.Length != 0,
string.Format("Line '{0}' cannot be parsed. Is it empty?", line));
errors.Assert(() => elements.Length != 1,
string.Format("Line '{0}' cannot be parsed. With '{1}' separator it has only one element.", line,
dataElementSeparator));
for (var index = 0; index < elements.Length; index++)
elements[index] = elements[index].Trim();
return new Segment(elements);
}