internal RecordState GetDefaultRecordState(Shaper <RecordState> shaper)
{
RecordState recordState = (RecordState)null;
if (this.RecordStateFactories.Count > 0)
{
recordState = (RecordState)shaper.State[this.RecordStateFactories[0].StateSlotNumber];
recordState.ResetToDefaultState();
}
return(recordState);
}
/// <summary>
/// Returns the "default" record state (that is, the one we use for PreRead/PastEnd reader states
/// </summary>
internal RecordState GetDefaultRecordState(Shaper <RecordState> shaper)
{
RecordState result = null;
if (RecordStateFactories.Count > 0)
{
// CONSIDER: We're relying upon having the default for polymorphic types be
// the first item in the list; that sounds kind of risky.
result = (RecordState)shaper.State[RecordStateFactories[0].StateSlotNumber];
Debug.Assert(null != result, "did you initialize the record states?");
result.ResetToDefaultState();
}
return(result);
}
private void SetShaper(Shaper<RecordState> shaper, CoordinatorFactory<RecordState> coordinatorFactory, int depth)
{
_shaper = shaper;
_coordinatorFactory = coordinatorFactory;
_dataRecord = new BridgeDataRecord(shaper, depth);
// To determine whether there are any rows for this coordinator at this place in
// the root enumerator, we pretty much just look at it's current record (we'll read
// one if there isn't one waiting) and if it matches our coordinator, we've got rows.
_hasRows = false;
if (!_shaper.DataWaiting)
{
_shaper.DataWaiting = _shaper.RootEnumerator.MoveNext();
}
if (_shaper.DataWaiting)
{
var currentRecord = _shaper.RootEnumerator.Current;
if (null != currentRecord)
{
_hasRows = (currentRecord.CoordinatorFactory == _coordinatorFactory);
}
}
// Once we've created the root enumerator, we can get the default record state
_defaultRecordState = coordinatorFactory.GetDefaultRecordState(_shaper);
Debug.Assert(null != _defaultRecordState, "no default?");
}