[jira] [Assigned] (SPARK-20554) Remove usage of scala.language.reflectiveCalls

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-20554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-20554:
------------------------------------

    Assignee: Apache Spark

> Remove usage of scala.language.reflectiveCalls
> ----------------------------------------------
>
>                 Key: SPARK-20554
>                 URL: https://issues.apache.org/jira/browse/SPARK-20554
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, Spark Core, SQL, Structured Streaming
>    Affects Versions: 2.1.0
>            Reporter: Sean Owen
>            Assignee: Apache Spark
>            Priority: Minor
>
> In several parts of the code we have imported {{scala.language.reflectiveCalls}} to suppress a warning about, well, reflective calls. I know from cleaning up build warnings in 2.2 that in almost all cases of this are inadvertent and masking a type problem.
> Example, in HiveDDLSuite:
> {code}
>     val expectedTablePath =
>       if (dbPath.isEmpty) {
>         hiveContext.sessionState.catalog.defaultTablePath(tableIdentifier)
>       } else {
>         new Path(new Path(dbPath.get), tableIdentifier.table)
>       }
>     val filesystemPath = new Path(expectedTablePath.toString)
> {code}
> This shouldn't really work because one branch returns a URI and the other a Path. In this case it only needs an object with a toString method and can make this work with structural types and reflection.
> Obviously, the intent was to add ".toURI" to the second branch though to make both a URI!
> I think we should probably clean this up by taking out all imports of reflectiveCalls, and re-evaluating all of the warnings. There may be a few legit usages.



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