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https://issues.apache.org/jira/browse/SPARK-22739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust updated SPARK-22739:
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Target Version/s: 2.3.0
> Additional Expression Support for Objects
> -----------------------------------------
>
> Key: SPARK-22739
> URL: https://issues.apache.org/jira/browse/SPARK-22739
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Aleksander Eskilson
>
> Some discussion in Spark-Avro [1] motivates additions and minor changes to
> the {{Objects}} Expressions API [2]. The proposed changes include
> * a generalized form of {{initializeJavaBean}} taking a sequence of
> initialization expressions that can be applied to instances of varying objects
> * an object cast that performs a simple Java type cast against a value
> * making {{ExternalMapToCatalyst}} public, for use in outside libraries
> These changes would facilitate the writing of custom encoders for varying
> objects that cannot already be readily converted to a statically typed
> dataset by a JavaBean encoder (e.g. Avro).
> [1] --
> https://github.com/databricks/spark-avro/pull/217#issuecomment-342599110
> [2] --
>
> https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
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