java.lang.Object
- org.apache.flink.types.MapValue<K,V>

Type Parameters:

K - Type of the map's key element.

V - Type of the map's value element.

All Implemented Interfaces:

Serializable, Map<K,V>, IOReadableWritable, Value
```
@Public
public abstract class MapValue<K extends Value,V extends Value>
extends Object
implements Value, Map<K,V>
```
Generic map base type for PACT programs that implements the Value and Map interfaces. The MapValue encapsulates a Java HashMap object.

See Also:

Value, Map, HashMap, Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors
Constructor	Description
`MapValue()`	Initializes the encapsulated map with an empty HashMap.
`MapValue(Map<K,V> map)`	Initializes the encapsulated map with a HashMap filled with all entries of the provided map.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`
`boolean`	`containsKey(Object key)`
`boolean`	`containsValue(Object value)`
`Set<Map.Entry<K,V>>`	`entrySet()`
`boolean`	`equals(Object obj)`
`V`	`get(Object key)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Set<K>`	`keySet()`
`V`	`put(K key, V value)`
`void`	`putAll(Map<? extends K,? extends V> m)`
`void`	`read(DataInputView in)`	Reads the object's internal data from the given data input view.
`V`	`remove(Object key)`
`int`	`size()`
`String`	`toString()`
`Collection<V>`	`values()`
`void`	`write(DataOutputView out)`	Writes the object's internal data to the given data output view.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

- Constructor Detail
  - MapValue
```
public MapValue()
```
    Initializes the encapsulated map with an empty HashMap.
  - MapValue
```
public MapValue(Map<K,V> map)
```
    Initializes the encapsulated map with a HashMap filled with all entries of the provided map.
    
    Parameters:
    
    map - Map holding all entries with which the new encapsulated map is filled.
- Method Detail
  - read
```
public void read(DataInputView in)
          throws IOException
```
    Description copied from interface: IOReadableWritable
    
    Reads the object's internal data from the given data input view.
    
    Specified by:
    
    read in interface IOReadableWritable
    
    Parameters:
    
    in - the input view to read the data from
    
    Throws:
    
    IOException - thrown if any error occurs while reading from the input stream
  - write
```
public void write(DataOutputView out)
           throws IOException
```
    Description copied from interface: IOReadableWritable
    
    Writes the object's internal data to the given data output view.
    
    Specified by:
    
    write in interface IOReadableWritable
    
    Parameters:
    
    out - the output view to receive the data.
    
    Throws:
    
    IOException - thrown if any error occurs while writing to the output stream
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in interface Map<K extends Value,V extends Value>
    
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object obj)
```
    Specified by:
    
    equals in interface Map<K extends Value,V extends Value>
    
    Overrides:
    
    equals in class Object
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface Map<K extends Value,V extends Value>
  - containsKey
```
public boolean containsKey(Object key)
```
    Specified by:
    
    containsKey in interface Map<K extends Value,V extends Value>
  - containsValue
```
public boolean containsValue(Object value)
```
    Specified by:
    
    containsValue in interface Map<K extends Value,V extends Value>
  - entrySet
```
public Set<Map.Entry<K,V>> entrySet()
```
    Specified by:
    
    entrySet in interface Map<K extends Value,V extends Value>
  - get
```
public V get(Object key)
```
    Specified by:
    
    get in interface Map<K extends Value,V extends Value>
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface Map<K extends Value,V extends Value>
  - keySet
```
public Set<K> keySet()
```
    Specified by:
    
    keySet in interface Map<K extends Value,V extends Value>
  - put
```
public V put(K key,
             V value)
```
    Specified by:
    
    put in interface Map<K extends Value,V extends Value>
  - putAll
```
public void putAll(Map<? extends K,? extends V> m)
```
    Specified by:
    
    putAll in interface Map<K extends Value,V extends Value>
  - remove
```
public V remove(Object key)
```
    Specified by:
    
    remove in interface Map<K extends Value,V extends Value>
  - size
```
public int size()
```
    Specified by:
    
    size in interface Map<K extends Value,V extends Value>
  - values
```
public Collection<V> values()
```
    Specified by:
    
    values in interface Map<K extends Value,V extends Value>

Class MapValue<K extends Value,​V extends Value>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Map

Constructor Detail

MapValue

MapValue

Method Detail

read

write

toString

hashCode

equals

clear

containsKey

containsValue

entrySet

get

isEmpty

keySet

put

putAll

remove

size

values

Class MapValue<K extends Value,V extends Value>