internal override void Execute(Processor processor, ActionFrame frame)
{
Debug.Assert(processor != null && frame != null);
switch (frame.State)
{
case Initialized:
if (sortContainer != null)
{
processor.InitSortArray();
processor.PushActionFrame(sortContainer, frame.NodeSet);
frame.State = ProcessedSort;
break;
}
goto case ProcessedSort;
case ProcessedSort:
frame.InitNewNodeSet(processor.StartQuery(frame.NodeSet, this.selectKey));
if (sortContainer != null)
{
Debug.Assert(processor.SortArray.Count != 0);
frame.SortNewNodeSet(processor, processor.SortArray);
}
frame.State = ProcessNextNode;
goto case ProcessNextNode;
case ProcessNextNode:
Debug.Assert(frame.State == ProcessNextNode);
Debug.Assert(frame.NewNodeSet != null);
if (frame.NewNextNode(processor))
{
frame.State = PositionAdvanced;
goto case PositionAdvanced;
}
else
{
frame.Finished();
break;
}
case PositionAdvanced:
processor.PushActionFrame(frame, frame.NewNodeSet);
frame.State = ContentsProcessed;
break;
case ContentsProcessed:
frame.State = ProcessNextNode;
goto case ProcessNextNode;
}
}