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[TOREE-492] Add DataFrame displayer #167

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[TOREE-492] Add DataFrame displayer #167

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10 changes: 8 additions & 2 deletions ...nterpreter/src/main/scala/org/apache/toree/kernel/interpreter/scala/ScalaDisplayers.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -23,8 +23,7 @@ import scala.collection.JavaConverters._
import scala.collection.mutable
import scala.util.Try
import org.apache.spark.SparkContext
import org.apache.spark.sql.Row
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.{DataFrame, Row, SparkSession}
import jupyter.Displayer
import jupyter.Displayers
import jupyter.MIMETypes
Expand Down Expand Up @@ -64,6 +63,13 @@ object ScalaDisplayers {
}
})

Displayers.register(classOf[DataFrame], new Displayer[DataFrame] {
override def display(df: DataFrame): util.Map[String, String] = toJava {
val (text, html) = displayRows(df.head(20), Some(df.schema.fieldNames))
Map(MIMEType.PlainText -> text, MIMEType.TextHtml -> html)
}
})

Displayers.register(classOf[Array[Row]], new Displayer[Array[Row]] {
override def display(arr: Array[Row]): util.Map[String, String] = toJava {
val (text, html) = displayRows(arr)
Expand Down