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https://issues.apache.org/jira/browse/TINKERPOP-1901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Florian Hockmann closed TINKERPOP-1901.
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Resolution: Fixed
> Enable usage of enums in more steps in Gremlin.Net
> --------------------------------------------------
>
> Key: TINKERPOP-1901
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1901
> Project: TinkerPop
> Issue Type: Improvement
> Components: dotnet
> Affects Versions: 3.2.7, 3.3.1
> Reporter: Florian Hockmann
> Assignee: Florian Hockmann
> Priority: Minor
> Fix For: 3.2.8, 3.3.2
>
>
> Java enums can implement interfaces and some Gremlin steps take interfaces as
> arguments that are implemented by enums like {{T}} or {{P}} in Java. However,
> C# enums can't have any methods and therefore also not implement interfaces.
> For this reason, step arguments whose type is one of those interfaces
> ({{Predicate}}, {{Function}}, ...) currently have the type {{object}} in
> Gremlin.Net which makes it hard for users to know what kind of values they
> can use for these arguments.
> This overload of the {{By}} step is a good example for this:
> * In Gremlin-java:
> {code:java}
> public default <V> GraphTraversal<S, E> by(final Traversal<?, ?> traversal,
> final Comparator<V> comparator)
> {code}
> * In Gremlin.Net:
> {code}
> public GraphTraversal<S, E> By (object function, object comparator)
> {code}
> [~jorgebg] [suggested two possible
> solutions|https://github.com/apache/tinkerpop/pull/792#discussion_r167847541]
> for this problem:
> {quote} * Use a class for T (not an enum), properties like T.Id could return
> instances of whatever interface we create for it. Given that java enums
> functionality is more comprehensive than what C# currently supports, it makes
> sense to use a class IMO.
> * Generate the offending traversal methods manually.{quote}
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