GenericMapData (Flink : Table : Common 2.1.0 API)

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 Description

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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