/// <summary>
/// Flushes any remaining data before a control segment.
/// </summary>
/// <param name="segment">The control segment.</param>
/// <returns>The parsed segments.</returns>
protected EdiItem Flush(string segment)
{
if (!CurrentSegments.Any())
{
return(null);
}
var firstSegment = CurrentSegments.First().Value;
if (Separators != null)
{
Buffer(segment + Separators.Segment);
}
else
{
Buffer(segment);
}
var result = ParseSegments() ?? new ReaderErrorContext(
new Exception(string.Format("Invalid control structure beginning with {0}",
firstSegment)), ReaderErrorCode.InvalidControlStructure);
CurrentMessageContext = null;
SegmentIndex = 0;
PartsIndex = 0;
return(result);
}
/// <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);
}