MapMapConverter (Flink : Table : Runtime 2.0.0 API)

java.lang.Object
- org.apache.flink.table.data.conversion.MapMapConverter<K,V>

All Implemented Interfaces:

Serializable, DataStructureConverter<org.apache.flink.table.data.MapData,Map<K,V>>
```
@Internal
public class MapMapConverter<K,V>
extends Object
implements DataStructureConverter<org.apache.flink.table.data.MapData,Map<K,V>>
```
Converter for MapType/MultisetType of Map external type.

See Also:

Serialized Form

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static MapMapConverter<?,?>`	`createForMapType(org.apache.flink.table.types.DataType dataType)`
`static MapMapConverter<?,?>`	`createForMultisetType(org.apache.flink.table.types.DataType dataType)`
`void`	`open(ClassLoader classLoader)`
`Map<K,V>`	`toExternal(org.apache.flink.table.data.MapData internal)`	Converts to external data structure.
`org.apache.flink.table.data.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<K,V>
  - toInternal
```
public org.apache.flink.table.data.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<K,V>
  - toExternal
```
public Map<K,V> toExternal(org.apache.flink.table.data.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<K,V>
  - createForMapType
```
public static MapMapConverter<?,?> createForMapType(org.apache.flink.table.types.DataType dataType)
```
  - createForMultisetType
```
public static MapMapConverter<?,?> createForMultisetType(org.apache.flink.table.types.DataType dataType)
```