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