System.Xml.Xsl.XsltOld.ForEachAction.Execute C# (CSharp) Method

        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;
            }
        }