public linkedListOperationExecutor(
ExecutionSequenceParameters eParams,
LinkedList <LinkedListItem> list)
{
state = new LinkedListExecutionState(list);
state.AddToKnownNodes(list.First);
state.AddToKnownNodes(list.Last);
this.eParams = eParams;
}
public override LinkedListNode <LinkedListItem> RunOnLinkedList(LinkedListExecutionState state)
{
if (state.Current == null ||
state.Current == state.List.Last ||
state.Current == state.List.First)
{
return(null);
}
ListItemData oldData = state.Current.Value.Data;
if (oldData.Value != prevalentValue ||
state.Current.Value.Deleted)
{
state.AddToKnownNodes(null);
return(null);
}
return
(state.AddingToKnownNodes(
state.List.AddAfter(state.Current, new LinkedListItem(Value))));
}