/// <summary>
/// Reads an EDI item from the stream.
/// </summary>
/// <returns>Indication if an item was read.</returns>
public override bool Read()
{
if (Item is ReaderErrorContext && !ContinueOnError)
{
return(false);
}
Item = null;
try
{
while ((!StreamReader.EndOfStream || InternalBuffer.Any()) && Item == null)
{
var segment = ReadSegment();
if (Separators == null)
{
throw new ReaderException("No valid separator set was found.", ReaderErrorCode.InvalidControlStructure);
}
if (string.IsNullOrEmpty(segment))
{
continue;
}
Item = Split(segment) ?? Process(segment);
}
}
catch (ReaderException ex)
{
Item = new ReaderErrorContext(ex, ex.ErrorCode);
}
catch (ParserMessageException ex)
{
Item = new ReaderErrorContext(ex, ReaderErrorCode.InvalidSpecOrAssembly, ex.MessageErrorContext);
}
catch (Exception ex)
{
Item = new ReaderErrorContext(ex, ReaderErrorCode.Unknown);
}
if (StreamReader.EndOfStream && CurrentSegments.Any())
{
Item = new ReaderErrorContext(new Exception("Improper end of file."), ReaderErrorCode.ImproperEndOfFile);
}
var readerErrorContext = Item as ReaderErrorContext;
if (readerErrorContext != null)
{
CurrentSegments.Clear();
if (readerErrorContext.MessageErrorContext == null)
{
Separators = null;
}
}
return(Item != null);
}
/// <summary>
/// Reads an item from the stream.
/// </summary>
/// <returns>Indication if an item was read.</returns>
public override bool Read()
{
if (Item is ReaderErrorContext && !ContinueOnError)
{
return(false);
}
Item = null;
try
{
while ((!StreamReader.EndOfStream || InternalBuffer.Any()) && Item == null)
{
var segment = ReadSegment();
if (string.IsNullOrEmpty(segment))
{
continue;
}
Item = Process(segment);
}
}
catch (ReaderException ex)
{
Item = new ReaderErrorContext(ex, ex.ErrorCode);
}
catch (ParserMessageException ex)
{
Item = new ReaderErrorContext(ex, ReaderErrorCode.InvalidSpecOrAssembly, ex.MessageErrorContext);
}
catch (Exception ex)
{
Item = new ReaderErrorContext(ex, ReaderErrorCode.Unknown);
}
if (StreamReader.EndOfStream && CurrentSegments.Any())
{
Item = Flush(null);
}
var readerErrorContext = Item as ReaderErrorContext;
if (readerErrorContext != null)
{
CurrentSegments.Clear();
}
return(Item != null);
}
/// <summary>
/// Parses the accumulated segments.
/// </summary>
protected EdiItem ParseSegments()
{
if (CurrentMessageContext == null)
{
CurrentSegments.Clear();
return(null);
}
EdiItem result;
try
{
var message = new TransactionSet(CurrentMessageContext.MessageType);
var errorContext = message.Analyze(CurrentSegments, CurrentMessageContext, Separators, PartsIndex,
SegmentIndex);
var ediMessage = (EdiMessage)message.ToInstance();
ediMessage.MessagePart = PartsIndex;
ediMessage.ControlNumber = CurrentMessageContext.ControlNumber;
ediMessage.ErrorContext = errorContext;
result = ediMessage;
}
catch (Exception ex)
{
result = new ReaderErrorContext(ex, ReaderErrorCode.InvalidSpecOrAssembly,
new MessageErrorContext(CurrentMessageContext.Name,
CurrentMessageContext.ControlNumber, CurrentMessageContext.Version, PartsIndex, ex.Message,
MessageErrorCode.MissingOrInvalidTransactionSet));
}
finally
{
SegmentIndex = SegmentIndex + CurrentSegments.Count;
CurrentSegments.Clear();
}
return(result);
}
