[jira] [Updated] (SPARK-14873) Java sampleByKey methods take ju.Map but with Scala Double values; results in type Object

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-14873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen updated SPARK-14873:
------------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: SPARK-11806

> Java sampleByKey methods take ju.Map but with Scala Double values; results in type Object
> -----------------------------------------------------------------------------------------
>
>                 Key: SPARK-14873
>                 URL: https://issues.apache.org/jira/browse/SPARK-14873
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Java API, Spark Core
>    Affects Versions: 1.6.1
>            Reporter: Sean Owen
>            Assignee: Sean Owen
>            Priority: Minor
>
> There's this odd bit of code in {{JavaStratifiedSamplingExample}}:
> {code}
>     // specify the exact fraction desired from each key Map<K, Object>
>     ImmutableMap<Integer, Object> fractions =
>       ImmutableMap.of(1, (Object)0.1, 2, (Object) 0.6, 3, (Object) 0.3);
>     // Get an approximate sample from each stratum
>     JavaPairRDD<Integer, Character> approxSample = data.sampleByKey(false, fractions);
> {code}
> It highlights a problem like that in https://issues.apache.org/jira/browse/SPARK-12604 where Scala primitive types are used where Java requires an object, and the result is that a signature that logically takes Double (objects) takes an Object in the Java API. It's an easy, similar fix.



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