trait ColumnMapper[T] extends AnyRef
Produces ColumnMapForReading or ColumnMapForWriting objects that map
class T properties to columns in a given Cassandra table.
You can associate a custom ColumnMapper object with any of your classes by
providing an implicit ColumnMapper in the companion object of the mapped class:
CREATE TABLE kv(key int primary key, value text);
case class KeyValue(k: Int, v: String) object KeyValue { implicit val columnMapper = new DefaultColumnMapper[KeyValue](Map("k" -> "key", "v" -> "value")) }
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abstract
def
columnMapForReading(struct: StructDef, selectedColumns: IndexedSeq[ColumnRef]): ColumnMapForReading
Provides a mapping between given table or UDT and properties of type
T, useful for creating objects of typeT.Provides a mapping between given table or UDT and properties of type
T, useful for creating objects of typeT. Throws IllegalArgumentException ifselectedColumnsdoes not provide some columns needed to instantiate object of typeT -
abstract
def
columnMapForWriting(struct: StructDef, selectedColumns: IndexedSeq[ColumnRef]): ColumnMapForWriting
Provides a mapping between given table or UDT and properties of type
T, useful for reading property values of typeTand writing them to Cassandra.Provides a mapping between given table or UDT and properties of type
T, useful for reading property values of typeTand writing them to Cassandra. Throws IllegalArgumentException ifselectedColumnscontains some columns that don't have matching getters. -
abstract
def
newTable(keyspaceName: String, tableName: String, protocolVersion: ProtocolVersion = ProtocolVersion.DEFAULT): TableDef
Provides a definition of the table that class
Tcould be saved to.
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