com.datastax.spark.connector.rdd.reader

RowReader

trait RowReader[T] extends Serializable

Transforms a Cassandra Java driver Row into high-level row representation, e.g. a tuple or a user-defined case class object. The target type T must be serializable.

Linear Supertypes
Serializable, Serializable, AnyRef, Any
Known Subclasses
ClassBasedRowReader, FunctionBasedRowReader1, FunctionBasedRowReader10, FunctionBasedRowReader11, FunctionBasedRowReader12, FunctionBasedRowReader2, FunctionBasedRowReader3, FunctionBasedRowReader4, FunctionBasedRowReader5, FunctionBasedRowReader6, FunctionBasedRowReader7, FunctionBasedRowReader8, FunctionBasedRowReader9, GenericRowReader$
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Abstract Value Members

  1. abstract def columnCount: Option[Int]

    The number of columns that need to be fetched from C*.

  2. abstract def columnNames: Option[Seq[String]]

    List of columns this RowReader is going to read.

    List of columns this RowReader is going to read. Useful to avoid fetching the columns that are not needed.

  3. abstract def read(row: Row, columnNames: Array[String]): T

    Reads column values from low-level Row and turns them into higher level representation.

    Reads column values from low-level Row and turns them into higher level representation.

    row

    row fetched from Cassandra

    columnNames

    column names available in the row

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  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  10. def finalize(): Unit

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  11. final def getClass(): Class[_]

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  14. final def ne(arg0: AnyRef): Boolean

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  15. final def notify(): Unit

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  16. final def notifyAll(): Unit

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  17. final def synchronized[T0](arg0: ⇒ T0): T0

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  19. final def wait(): Unit

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  20. final def wait(arg0: Long, arg1: Int): Unit

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