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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