public override Traversal ToTraversal(IGremlinQueryEnvironment environment)
{
var keyProjectionTraversal = _keyProjection.ToTraversal(environment);
var maybeValueProjectionTraversal = _valueProjection?.ToTraversal(environment);
return((keyProjectionTraversal.Count == 0 && (maybeValueProjectionTraversal?.Count).GetValueOrDefault() == 0)
? Traversal.Empty
: new LocalStep(Traversal
.Create(
4,
(keyProjectionTraversal, maybeValueProjectionTraversal),
static (steps, state) =>
{
var(keyProjectionTraversal, maybeValueProjectionTraversal) = state;
steps[0] = UnfoldStep.Instance;
steps[1] = GroupStep.Instance;
steps[2] = new GroupStep.ByTraversalStep(Traversal
.Create(
keyProjectionTraversal.Count + 1,
keyProjectionTraversal,
static (steps, keyProjectionTraversal) =>
{
steps[0] = new SelectColumnStep(Column.Keys);
keyProjectionTraversal.Steps
.AsSpan()
.CopyTo(steps[1..]);
}));
public override Traversal ToTraversal(IGremlinQueryEnvironment environment)
{
var inner = _inner.ToTraversal(environment);
if (inner.Count > 0)
{
return(new LocalStep(Traversal.Create(
inner.Count + 2,
inner,
static (steps, inner) =>
{
steps[0] = UnfoldStep.Instance;
steps[^ 1] = FoldStep.Instance;
inner
.Steps
.AsSpan()
.CopyTo(steps[1..]);