org.apache.flink.table.data

Class GenericMapData

java.lang.Object

org.apache.flink.table.data.GenericMapData

All Implemented Interfaces:

MapData

@PublicEvolving
public final class GenericMapData
extends Object
implements MapData

An internal data structure representing data of MapType or MultisetType.

GenericMapData is a generic implementation of MapData which wraps regular Java maps.

Note: All keys and values of this data structure must be internal data structures. All keys must be of the same type; same for values. See RowData for more information about internal data structures.

Both keys and values can contain null for representing nullability.

Constructor Summary

Constructors

Constructor and Description
GenericMapData(Map<?,?> map) Creates an instance of GenericMapData using the given Java map.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Object	get(Object key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
int	hashCode()
ArrayData	keyArray() Returns an array view of the keys contained in this map.
int	size() Returns the number of key-value mappings in this map.
ArrayData	valueArray() Returns an array view of the values contained in this map.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericMapData

public GenericMapData(Map<?,?> map)

Creates an instance of GenericMapData using the given Java map.

Note: All keys and values of the map must be internal data structures.

Method Detail

get

public Object get(Object key)

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key. The returned value is in internal data structure.

size

public int size()

Description copied from interface: MapData

Returns the number of key-value mappings in this map.

Specified by:

size in interface MapData

keyArray

public ArrayData keyArray()

Description copied from interface: MapData

Returns an array view of the keys contained in this map.

A key-value pair has the same index in the key array and value array.

Specified by:

keyArray in interface MapData

valueArray

public ArrayData valueArray()

Description copied from interface: MapData

Returns an array view of the values contained in this map.

A key-value pair has the same index in the key array and value array.

Specified by:

valueArray in interface MapData

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object