protected override bool MoveNextCore()
{
// Iterate sub cursor or move to the next file.
while (_subCursor == null || !_subCursor.MoveNext())
{
// Cleanup old sub cursor
if (_subCursor != null)
{
_subCursor.Dispose();
_subCursor = null;
}
if (!TryGetNextPathAndValues(out string path, out string relativePath, out List <string> values))
{
return(false);
}
IDataLoader loader = null;
try
{
// Load the sub cursor and reset the data.
loader = _parent.CreateLoaderFromBytes(_parent._subLoaderBytes, new MultiFileSource(path));
}
catch (Exception e)
{
Ch.Warning($"Failed to load file {path} due to a loader exception. Moving on to the next file. Ex: {e.Message}");
continue;
}
_subCursor = loader.GetRowCursor(col => _subActive[col]);
try
{
UpdateSubGetters();
UpdateColumnValues(relativePath, values);
}
catch (InvalidOperationException e)
{
// Failed to load this file so skip.
Ch.Warning(MessageSensitivity.Schema, e.Message);
if (_subCursor != null)
{
_subCursor.Dispose();
_subCursor = null;
}
}
}
return(true);
}