private static PathKind CalculatePathKind(IList <PathSegment> segments)
{
PathSegment lastSegment = segments.Last();
if (lastSegment is NavigationSegment)
{
if (lastSegment.IsSingle)
{
return(PathKind.SingleNavigation);
}
return(PathKind.CollectionNavigation);
}
else if (lastSegment is PropertySegment)
{
return(PathKind.Property);
}
else if (lastSegment is OperationSegment)
{
return(PathKind.Operation);
}
else if (lastSegment.Kind == SegmentKind.Type)
{
return(PathKind.TypeCast);
}
else
{
int count = segments.Count;
if (count == 1)
{
if (lastSegment is EntitySetSegment)
{
return(PathKind.EntitySet);
}
else if (lastSegment is SingletonSegment)
{
return(PathKind.Singleton);
}
else if (lastSegment is OperationImportSegment)
{
return(PathKind.OperationImport);
}
throw new System.Exception($"Unknown path kind!");
}
else if (count == 2 && lastSegment is KeySegment &&
segments[0] is EntitySetSegment)
{
return(PathKind.Entity);
}
else
{
PathSegment pre = segments[segments.Count - 2];
if (pre is NavigationSegment && lastSegment is KeySegment)
{
return(PathKind.SingleNavigation);
}
throw new System.Exception($"Unknown path kind!");
}
}
}