[jira] [Resolved] (SPARK-8527) StructType's Factory method does not work in java code

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-8527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li resolved SPARK-8527.
----------------------------
    Resolution: Fixed

> StructType's Factory method does not work in java code
> ------------------------------------------------------
>
>                 Key: SPARK-8527
>                 URL: https://issues.apache.org/jira/browse/SPARK-8527
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.4.0
>            Reporter: Hao Ren
>
> According to the following line of code below:
> https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala#L209
> The casting should be successful, however after type erasure, I encounter {{java.lang.ClassCastException}}:
> {code}
> ArrayList<StructField> structFields = new ArrayList<>();
> // Some add operation
> return StructType$.MODULE$.apply(structFields); // run time error
> Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lorg.apache.spark.sql.types.StructField;
> 	at org.apache.spark.sql.types.StructType$.apply(StructType.scala:209)
> {code}
> Am I missing anything ?



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