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.
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abstract
def
neededColumns: Option[Seq[ColumnRef]]
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. -
abstract
def
read(row: Row, rowMetaData: CassandraRowMetadata): 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
- rowMetaData
column names and codec available in the
row
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(Since version ) see corresponding Javadoc for more information.