[jira] [Created] (TINKERPOP-2502) Consistent start API for anonymous and regular traversals

["Christopher Smith (Jira)" <ji...@apache.org>]

Christopher Smith created TINKERPOP-2502:
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             Summary: Consistent start API for anonymous and regular traversals
                 Key: TINKERPOP-2502
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2502
             Project: TinkerPop
          Issue Type: Improvement
          Components: process
    Affects Versions: 3.4.9
            Reporter: Christopher Smith


I am writing a graph-based application and am taking advantage of the method-based nature of Gremlin to librarify some of my common usage patterns. However, I'm encountering a frustrating problem where I frequently need to be able to attach the same traversal steps to either a real {{GraphTraversalSource}} or an anonymous traversal (usually for some nested reason like a coalesced conditional insert).

The methods on {{__}} are mostly static, but I can call {{__.start()}} to obtain a live {{GraphTraversal}} object and then proceed from there (invoking {{GraphTraversal#addV}}, for example). {{GraphTraversalSource}}, however, requires me to invoke the method {{GraphTraversalSource#addV}} to get started, and there's no common base type. I think I could theoretically use something like {{inject()}}, but that seems particularly odd.

It would be helpful to either have both {{GraphTraversal}} and {{GraphTraversalSource}} implement a common interface holding the "start opcodes" or to have a {{GraphTraversalSource#start()}} method that could be used to obtain a "blank" traversal.



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