[jira] [Created] (TINKERPOP-2515) Add clone method to GraphTraversal interface

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

Christopher Smith created TINKERPOP-2515:
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             Summary: Add clone method to GraphTraversal interface
                 Key: TINKERPOP-2515
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2515
             Project: TinkerPop
          Issue Type: Improvement
    Affects Versions: 3.4.9
            Reporter: Christopher Smith


The canonical recommendation for reusing traversal parts (e.g., I have a method that takes a {{GraphTraversal}} as a parameter, and I need to apply {{.id()}} to it) is to call {{clone()}} on the traversal. However, the interface {{GraphTraversal}} does not actually provide a {{clone()}} method, and {{Object#clone()}} is protected. The universal actual implementations {{DefaultTraversal}} and {{DefaultGraphTraversal}} explicitly expose {{clone()}}, but they're hidden behind the interfaces.

To provide Java/STC compatibility, {{GraphTraversal}} (and possibly {{Traversal}}) should expose the {{clone()}} methods.



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