/// <summary>
/// Tries to parse what had been collected before a new message starts.
/// </summary>
/// <param name="segmentContext">The current segment.</param>
/// <param name="tag">The start new message tag.</param>
/// <returns>If flushed.</returns>
internal bool Flush(SegmentContext segmentContext, SegmentTags tag)
{
if ((segmentContext.IsControl || segmentContext.Tag == tag) && CurrentMessage.Any())
{
foreach (var c in segmentContext.Value)
{
Buffer.Enqueue(c);
}
Buffer.Enqueue(Separators.Segment);
try
{
if (CurrentGroupHeader != null)
{
CurrentMessage.Add(CurrentGroupHeader);
}
Item = CurrentMessage.Analyze(Separators, BuildContext());
}
finally
{
CurrentMessage.Clear();
}
return(true);
}
return(false);
}
/// <summary>
/// Reads an EDI item from the stream.
/// An EDI item is an IEdiControl or a message or a ParsingException.
/// </summary>
/// <returns>Indication if an item was read.</returns>
public bool Read()
{
Item = null;
try
{
while ((!StreamReader.EndOfStream || Buffer.Any()) && Item == null)
{
ProcessSegment(ReadSegment());
if (Separators != null)
{
continue;
}
Item = new ParsingException(ErrorCodes.InvalidControlStructure, "No valid interchange header was found.");
}
}
catch (ParsingException ex)
{
Item = ex;
}
catch (Exception ex)
{
Item = new ParsingException(ErrorCodes.Unknown, ex.Message, ex);
}
if (StreamReader.EndOfStream && CurrentMessage.Any())
{
Item = new ParsingException(ErrorCodes.ImproperEndOfFile, "Unprocessed segments before the end of file.");
CurrentMessage.Clear();
}
return(Item != null);
}
