Spark之 ArrayType

ArrayType definition

case class ArrayType(elementType: DataType, containsNull: Boolean) extends DataType {

  /** No-arg constructor for kryo. */
  protected def this() = this(null, false)

  private[sql] def buildFormattedString(
      prefix: String,
      stringConcat: StringConcat,
      maxDepth: Int): Unit = {
    if (maxDepth > 0) {
      stringConcat.append(
        s"$prefix-- element: ${elementType.typeName} (containsNull = $containsNull)\n")
      DataType.buildFormattedString(elementType, s"$prefix    |", stringConcat, maxDepth)
    }
  }

  override private[sql] def jsonValue =
    ("type" -> typeName) ~
      ("elementType" -> elementType.jsonValue) ~
      ("c