public override void Dispose()
{
if (!_disposed)
{
var disposableState = _state as IDisposable;
var disposableSrc = _src as IDisposable;
var disposableDst = _dst as IDisposable;
if (disposableState != null)
{
disposableState.Dispose();
}
if (disposableSrc != null)
{
disposableSrc.Dispose();
}
if (disposableDst != null)
{
disposableDst.Dispose();
}
_input.Dispose();
base.Dispose();
_disposed = true;
}
}
public ISlotCursor GetSlotCursor(int col)
{
_host.CheckParam(0 <= col && col < _header.ColumnCount, nameof(col));
var view = _entries[col].GetViewOrNull();
if (view == null)
{
throw _host.ExceptParam(nameof(col), "Bad call to GetSlotCursor on untransposable column '{0}'",
Schema.GetColumnName(col));
}
_host.CheckParam(0 <= col && col < _header.ColumnCount, nameof(col));
// We don't want the type error, if there is one, to be handled by the get-getter, because
// at the point we've gotten the interior cursor, but not yet constructed the slot cursor.
ColumnType cursorType = TransposeSchema.GetSlotType(col).ItemType;
IRowCursor inputCursor = view.GetRowCursor(c => true);
try
{
return(Utils.MarshalInvoke(GetSlotCursorCore <int>, cursorType.RawType, inputCursor));
}
catch (Exception)
{
// We've already verified the types so we shouldn't throw here, in principle, but just
// be extra careful so we're sure to dispose the input cursor.
if (inputCursor != null)
{
inputCursor.Dispose();
}
throw;
}
}
public void Dispose()
{
if (!_disposed)
{
_input.Dispose();
Ch.Dispose();
_disposed = true;
}
}
protected override bool MoveNextCore()
{
Ch.AssertValue(_currentCursor);
while (!_currentCursor.MoveNext())
{
// Mark the current cursor as finished.
_currentCursor.Dispose();
_currentCursor = null;
if (++_currentSourceIndex >= Sources.Length)
{
return(false);
}
_currentCursor = Sources[_currentSourceIndex].GetRowCursor(c => IsColumnActive(c));
_currentIdGetter = _currentCursor.GetIdGetter();
}
return(true);
}
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);
}
public override void Dispose()
{
_leadingCursor.Dispose();
_trailingCursor.Dispose();
base.Dispose();
}
void IDisposable.Dispose()
{
_inputCursor.Dispose();
GC.SuppressFinalize(this);
}
