/// <summary>
/// Returns the next record in the iteration.
/// </summary>
/// <returns></returns>
private IRecord Next()
{
if (curFileReader == null || !curFileReader.MoveNext())
{
NextFile();
}
return(curFileReader == null ? null : curFileReader.Current);
}
public bool MoveNext()
{
if (reader.MoveNext())
{
currentRecord = Next();
return(currentRecord != null);
}
return(false);
}
private IRecord Next()
{
if (_currentRecord != null)
{
IRecord tmp = _currentRecord;
_currentRecord = null;
return(tmp);
}
else
if (_currentRecord == null)
{
if (_nextRecord != null)
{
_currentRecord = _nextRecord;
CopyErrors(_currentErrors, _nextErrors);
_nextRecord = null;
}
if (!_reader.MoveNext())
{
return((_currentRecord != null) ? Next() : null);
}
try
{
_nextRecord = _reader.Current;
}
catch (Exception e)
{
if (_currentRecord != null)
{
String recCntlNum = _currentRecord.GetControlNumber();
throw new MarcException("Couldn't get next record after " + (recCntlNum != null ? recCntlNum : "") + " -- " + e.ToString());
}
else
{
throw new MarcException("Marc record couldn't be read -- " + e.ToString());
}
}
while (RecordsMatch(_currentRecord, _nextRecord))
{
_currentRecord = CombineRecords(_currentRecord, _nextRecord, _idsToMerge);
MergeErrors(_currentErrors, _nextErrors);
if (_reader.MoveNext())
{
try
{
_nextRecord = _reader.Current;
}
catch (Exception e)
{
var recCntlNum = _currentRecord.GetControlNumber();
throw new MarcException("Couldn't get next record after " + (recCntlNum != null ? recCntlNum : "") + " -- " + e.ToString());
}
}
else
{
_nextRecord = null;
}
}
return(Next());
}
return(null);
}
