org.apache.flink.table.data.conversion

Class MapMapConverter<K,V>

java.lang.Object

org.apache.flink.table.data.conversion.MapMapConverter<K,V>

All Implemented Interfaces:

Serializable, DataStructureConverter<MapData,Map<K,V>>

@Internal
public class MapMapConverter<K,V>
extends Object
implements DataStructureConverter<MapData,Map<K,V>>

Converter for MapType/MultisetType of Map external type.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static MapMapConverter<?,?>	createForMapType(DataType dataType)
static MapMapConverter<?,?>	createForMultisetType(DataType dataType)
void	open(ClassLoader classLoader)
Map<K,V>	toExternal(MapData internal) Converts to external data structure.
MapData	toInternal(Map<K,V> external) Converts to internal data structure.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.data.conversion.DataStructureConverter

isIdentityConversion, toExternalOrNull, toInternalOrNull

Method Detail

open

public void open(ClassLoader classLoader)

Specified by:

open in interface DataStructureConverter<MapData,Map<K,V>>

toInternal

public MapData toInternal(Map<K,V> external)

Description copied from interface: DataStructureConverter

Converts to internal data structure.

Note: Parameter must not be null. Output must not be null.

Specified by:

toInternal in interface DataStructureConverter<MapData,Map<K,V>>

toExternal

public Map<K,V> toExternal(MapData internal)

Description copied from interface: DataStructureConverter

Converts to external data structure.

Note: Parameter must not be null. Output must not be null.

Specified by:

toExternal in interface DataStructureConverter<MapData,Map<K,V>>

createForMapType

public static MapMapConverter<?,?> createForMapType(DataType dataType)

createForMultisetType

public static MapMapConverter<?,?> createForMultisetType(DataType dataType)