public override IEnumerable <object> WriteTo(object writer, IEnumerable <object> records, Func <object, bool> predicate = null)
{
TextWriter sw = writer as TextWriter;
ChoGuard.ArgumentNotNull(sw, "TextWriter");
if (records == null)
{
yield break;
}
if (!RaiseBeginWrite(sw))
{
yield break;
}
CultureInfo prevCultureInfo = System.Threading.Thread.CurrentThread.CurrentCulture;
System.Threading.Thread.CurrentThread.CurrentCulture = Configuration.Culture;
string recText = String.Empty;
Type recType;
try
{
foreach (object record in records)
{
_index++;
recType = record.GetType();
if (record is IChoETLNameableObject)
{
ChoETLFramework.WriteLog(TraceSwitch.TraceVerbose, "Writing [{0}] object...".FormatString(((IChoETLNameableObject)record).Name));
}
else
{
ChoETLFramework.WriteLog(TraceSwitch.TraceVerbose, "Writing [{0}] object...".FormatString(_index));
}
recText = String.Empty;
if (record != null)
{
if (predicate == null || predicate(record))
{
//Discover and load Manifold columns from first record
if (!_configCheckDone)
{
//string[] fieldNames = null;
//if (record is ExpandoObject)
//{
// var dict = record as IDictionary<string, Object>;
// fieldNames = dict.Keys.ToArray();
//}
//else
//{
// fieldNames = ChoTypeDescriptor.GetProperties<ChoManifoldRecordFieldAttribute>(record.GetType()).Select(pd => pd.Name).ToArray();
// if (fieldNames.Length == 0)
// {
// fieldNames = ChoType.GetProperties(record.GetType()).Select(p => p.Name).ToArray();
// }
//}
//Configuration.Validate(fieldNames);
//WriteHeaderLine(sw);
_configCheckDone = true;
}
if (!RaiseBeforeRecordWrite(record, _index, ref recText))
{
yield break;
}
if (recText == null)
{
continue;
}
else if (recText.Length > 0)
{
sw.Write("{1}{0}", recText, Configuration.FileHeaderConfiguration.HasHeaderRecord ? Configuration.EOLDelimiter : "");
continue;
}
try
{
var config = GetConfiguration(record.GetType());
if (config == null)
{
throw new ChoParserException("No writer found to write record.");
}
if (config.GetType() == typeof(ChoCSVRecordConfiguration))
{
recText = ChoCSVWriter.ToText(record, config as ChoCSVRecordConfiguration, Configuration.Encoding, Configuration.BufferSize, TraceSwitch);
}
else if (config.GetType() == typeof(ChoFixedLengthRecordConfiguration))
{
recText = ChoFixedLengthWriter.ToText(record, config as ChoFixedLengthRecordConfiguration, Configuration.Encoding, Configuration.BufferSize, TraceSwitch);
}
else
{
throw new ChoParserException("Unsupported record found to write.");
}
if (recText != null)
{
if (_index == 1)
{
sw.Write("{1}{0}", recText, Configuration.FileHeaderConfiguration.HasHeaderRecord ? Configuration.EOLDelimiter : "");
}
else
{
sw.Write("{1}{0}", recText, Configuration.EOLDelimiter);
}
if (!RaiseAfterRecordWrite(record, _index, recText))
{
yield break;
}
}
}
catch (ChoParserException pEx)
{
throw new ChoParserException($"Failed to write line for '{recType}' object.", pEx);
}
catch (Exception ex)
{
ChoETLFramework.HandleException(ex);
if (Configuration.ErrorMode == ChoErrorMode.IgnoreAndContinue)
{
}
else if (Configuration.ErrorMode == ChoErrorMode.ReportAndContinue)
{
if (!RaiseRecordWriteError(record, _index, recText, ex))
{
throw new ChoWriterException($"Failed to write line for '{recType}' object.", ex);
}
}
else
{
throw new ChoWriterException($"Failed to write line for '{recType}' object.", ex);
}
}
}
}
yield return(record);
if (Configuration.NotifyAfter > 0 && _index % Configuration.NotifyAfter == 0)
{
if (RaisedRowsWritten(_index))
{
ChoETLFramework.WriteLog(TraceSwitch.TraceVerbose, "Abort requested.");
yield break;
}
}
}
}
finally
{
System.Threading.Thread.CurrentThread.CurrentCulture = prevCultureInfo;
}
RaiseEndWrite(sw);
}
public static string ToTextAll <TRec>(IEnumerable <TRec> records, ChoCSVRecordConfiguration configuration = null, TraceSwitch traceSwitch = null)
where TRec : class
{
return(ChoCSVWriter <TRec> .ToTextAll(records, configuration, traceSwitch));
}