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https://issues.apache.org/jira/browse/SPARK-10576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14742066#comment-14742066
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Kiran Lonikar commented on SPARK-10576:
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thats right, the intent is to find out if there is any particular reason to
colocate the java and scala files.
Additionally, there are instances of scala files in java source tree. Did not
make an attempt to find all, but here is one:
core/src/main/java/org/apache/spark/api/java/function/package.scala
> Move .java files out of src/main/scala
> --------------------------------------
>
> Key: SPARK-10576
> URL: https://issues.apache.org/jira/browse/SPARK-10576
> Project: Spark
> Issue Type: Improvement
> Components: Build
> Affects Versions: 1.5.0
> Reporter: Sean Owen
> Priority: Minor
>
> (I suppose I'm really asking for an opinion on this, rather than asserting it
> must be done, but seems worthwhile. CC [~rxin] and [~pwendell])
> As pointed out on the mailing list, there are some Java files in the Scala
> source tree:
> {code}
> ./bagel/src/main/scala/org/apache/spark/bagel/package-info.java
> ./core/src/main/scala/org/apache/spark/annotation/AlphaComponent.java
> ./core/src/main/scala/org/apache/spark/annotation/DeveloperApi.java
> ./core/src/main/scala/org/apache/spark/annotation/Experimental.java
> ./core/src/main/scala/org/apache/spark/annotation/package-info.java
> ./core/src/main/scala/org/apache/spark/annotation/Private.java
> ./core/src/main/scala/org/apache/spark/api/java/package-info.java
> ./core/src/main/scala/org/apache/spark/broadcast/package-info.java
> ./core/src/main/scala/org/apache/spark/executor/package-info.java
> ./core/src/main/scala/org/apache/spark/io/package-info.java
> ./core/src/main/scala/org/apache/spark/rdd/package-info.java
> ./core/src/main/scala/org/apache/spark/scheduler/package-info.java
> ./core/src/main/scala/org/apache/spark/serializer/package-info.java
> ./core/src/main/scala/org/apache/spark/util/package-info.java
> ./core/src/main/scala/org/apache/spark/util/random/package-info.java
> ./external/flume/src/main/scala/org/apache/spark/streaming/flume/package-info.java
> ./external/kafka/src/main/scala/org/apache/spark/streaming/kafka/package-info.java
> ./external/mqtt/src/main/scala/org/apache/spark/streaming/mqtt/package-info.java
> ./external/twitter/src/main/scala/org/apache/spark/streaming/twitter/package-info.java
> ./external/zeromq/src/main/scala/org/apache/spark/streaming/zeromq/package-info.java
> ./graphx/src/main/scala/org/apache/spark/graphx/impl/EdgeActiveness.java
> ./graphx/src/main/scala/org/apache/spark/graphx/lib/package-info.java
> ./graphx/src/main/scala/org/apache/spark/graphx/package-info.java
> ./graphx/src/main/scala/org/apache/spark/graphx/TripletFields.java
> ./graphx/src/main/scala/org/apache/spark/graphx/util/package-info.java
> ./mllib/src/main/scala/org/apache/spark/ml/attribute/package-info.java
> ./mllib/src/main/scala/org/apache/spark/ml/package-info.java
> ./mllib/src/main/scala/org/apache/spark/mllib/package-info.java
> ./sql/catalyst/src/main/scala/org/apache/spark/sql/types/SQLUserDefinedType.java
> ./sql/hive/src/main/scala/org/apache/spark/sql/hive/package-info.java
> ./streaming/src/main/scala/org/apache/spark/streaming/api/java/package-info.java
> ./streaming/src/main/scala/org/apache/spark/streaming/dstream/package-info.java
> ./streaming/src/main/scala/org/apache/spark/streaming/StreamingContextState.java
> {code}
> It happens to work since the Scala compiler plugin is handling both.
> On its face, they should be in the Java source tree. I'm trying to figure out
> if there are good reasons they have to be in this less intuitive location.
> I might try moving them just to see.
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