internal void ConfigureStartAndEndSteps(GraphTraversal2 whereTraversal)
{
if (whereTraversal.TranslationOpList.Count >= 2)
{
//__.as()
GremlinAsOp asOp = whereTraversal.TranslationOpList[1] as GremlinAsOp;
if (asOp != null)
{
whereTraversal.TranslationOpList.RemoveAt(1); //remove as-step
whereTraversal.InsertOperator(1, new GremlinSelectOp(GremlinKeyword.Pop.Last, asOp.Labels.First()));
}
//__.Or()
GremlinOrOp orOp = whereTraversal.TranslationOpList[1] as GremlinOrOp;
if (orOp != null)
{
foreach (var traversal in orOp.OrTraversals)
{
ConfigureStartAndEndSteps(traversal);
}
}
//__.And()
GremlinAndOp andOp = whereTraversal.TranslationOpList[1] as GremlinAndOp;
if (andOp != null)
{
foreach (var traversal in andOp.AndTraversals)
{
ConfigureStartAndEndSteps(traversal);
}
}
//__.Not()
GremlinNotOp notOp = whereTraversal.TranslationOpList[1] as GremlinNotOp;
if (notOp != null)
{
ConfigureStartAndEndSteps(notOp.NotTraversal);
}
}
var lastOp = WhereTraversal.GetEndOp() as GremlinAsOp;
if (lastOp != null)
{
string label = lastOp.Labels.First();
whereTraversal.TranslationOpList.Remove(whereTraversal.GetEndOp()); //remove the last as-step
whereTraversal.AddOperator(new GremlinWherePredicateOp(Predicate.eq(label)));
}
}