private static void Visit(ISelection selection, QueryPlanContext context)
{
if (selection.IsStreamable && selection.SelectionSet is not null)
{
QueryPlanContext streamContext = context.Branch();
VisitChildren(selection, streamContext);
if (streamContext.Root is not null &&
!context.Streams.ContainsKey(selection.Id))
{
context.Streams.Add(selection.Id, new(selection.Id, streamContext.Root));
}
if (streamContext.Streams.Count > 0)
{
foreach (StreamPlanNode streamPlan in streamContext.Streams.Values)
{
if (!context.Streams.ContainsKey(selection.Id))
{
context.Streams.Add(selection.Id, streamPlan);
}
}
}
}
if (context.NodePath.Count == 0)
{
context.Root = new ResolverNode(selection);
context.NodePath.Push(context.Root);
}
else
{
QueryPlanNode parent = context.NodePath.Peek();
if (selection.Strategy == SelectionExecutionStrategy.Serial)
{
if (parent is ResolverNode {
Strategy : ExecutionStrategy.Serial
} p)
{
p.Selections.Add(selection);
}
else if (context.SelectionPath.Count > 0 &&
context.NodePath.TryPeek(2, out QueryPlanNode? grandParent) &&
grandParent is ResolverNode {
Strategy: ExecutionStrategy.Serial
} gp&&
gp.Selections.Contains(context.SelectionPath.PeekOrDefault() !))
{
gp.Selections.Add(selection);
}
