org.apache.flink.table.data

类 GenericMapData

java.lang.Object

org.apache.flink.table.data.GenericMapData

所有已实现的接口:

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.

构造器概要

构造器

构造器和说明
GenericMapData(Map<?,?> map) Creates an instance of GenericMapData using the given Java map.

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 java.lang.Object

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

构造器详细资料

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.

方法详细资料

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()

从接口复制的说明: MapData

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

指定者:

size 在接口中 MapData

keyArray

public ArrayData keyArray()

从接口复制的说明: 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.

指定者:

keyArray 在接口中 MapData

valueArray

public ArrayData valueArray()

从接口复制的说明: 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.

指定者:

valueArray 在接口中 MapData

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object