org.apache.spark.sql.types

Class MapType

Object

org.apache.spark.sql.types.DataType

org.apache.spark.sql.types.MapType

All Implemented Interfaces:

java.io.Serializable, scala.Equals, scala.Product

public class MapType
extends DataType
implements scala.Product, scala.Serializable

:: DeveloperApi :: The data type for Maps. Keys in a map are not allowed to have null values.

Please use DataTypes.createMapType() to create a specific instance.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MapType() No-arg constructor for kryo.
MapType(DataType keyType, DataType valueType, boolean valueContainsNull)

Method Summary

Methods

Modifier and Type	Method and Description
static MapType	apply(DataType keyType, DataType valueType) Construct a MapType object with the given key type and value type.
MapType	asNullable() Returns the same data type but set all nullability fields are true (StructField.nullable, ArrayType.containsNull, and MapType.valueContainsNull).
void	buildFormattedString(String prefix, scala.collection.mutable.StringBuilder builder)
int	defaultSize() The default size of a value of the MapType is 100 * (the default size of the key type + the default size of the value type).
org.json4s.JsonAST.JValue	jsonValue()
DataType	keyType()
String	simpleString()
boolean	valueContainsNull()
DataType	valueType()

Methods inherited from class org.apache.spark.sql.types.DataType

equalsIgnoreCompatibleNullability, equalsIgnoreNullability, fromCaseClassString, fromJson, isPrimitive, json, prettyJson, sameType, typeName, unapply

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface scala.Product

productArity, productElement, productIterator, productPrefix

Methods inherited from interface scala.Equals

canEqual, equals

Constructor Detail

MapType

public MapType(DataType keyType,
       DataType valueType,
       boolean valueContainsNull)

MapType

public MapType()

No-arg constructor for kryo.

Method Detail

apply

public static MapType apply(DataType keyType,
            DataType valueType)

Construct a MapType object with the given key type and value type. The valueContainsNull is true.

keyType

public DataType keyType()

valueType

public DataType valueType()

valueContainsNull

public boolean valueContainsNull()

buildFormattedString

public void buildFormattedString(String prefix,
                        scala.collection.mutable.StringBuilder builder)

jsonValue

public org.json4s.JsonAST.JValue jsonValue()

Overrides:

jsonValue in class DataType

defaultSize

public int defaultSize()

The default size of a value of the MapType is 100 * (the default size of the key type + the default size of the value type). (We assume that there are 100 elements).

Specified by:

defaultSize in class DataType

simpleString

public String simpleString()

Overrides:

simpleString in class DataType

asNullable

public MapType asNullable()

Description copied from class: DataType

Returns the same data type but set all nullability fields are true (StructField.nullable, ArrayType.containsNull, and MapType.valueContainsNull).

Specified by:

asNullable in class DataType