io.ray.streaming.state.keystate.state

Interface MapState<K,V>

All Superinterfaces:

State, UnaryState<Map<K,V>>

All Known Implementing Classes:

MapStateImpl

public interface MapState<K,V>
extends UnaryState<Map<K,V>>

MapState interface.

Method Summary

Modifier and Type	Method and Description
default boolean	contains(K key) Returns whether there exists the given mapping.
default Iterable<Map.Entry<K,V>>	entries() Returns all the mappings in the state
V	get(K key) Returns the current value associated with the given key.
default Iterator<Map.Entry<K,V>>	iterator() Iterates over all the mappings in the state.
default Iterable<K>	keys() Returns all the keys in the state
void	put(K key, V value) Associates a new value with the given key.
void	putAll(Map<K,V> map) Copies all of the mappings from the given map into the state.
void	remove(K key) Deletes the mapping of the given key.
void	update(Map<K,V> map) Resets the state value.
default Iterable<V>	values() Returns all the values in the state.

Methods inherited from interface io.ray.streaming.state.keystate.state.UnaryState

get

Methods inherited from interface io.ray.streaming.state.keystate.state.State

setCurrentKey

Method Detail

get

V get(K key)

Returns the current value associated with the given key.

Parameters:

key - The key of the mapping

Returns:

The value of the mapping with the given key

put

void put(K key,
         V value)

Associates a new value with the given key.

Parameters:

key - The key of the mapping

value - The new value of the mapping

update

void update(Map<K,V> map)

Resets the state value.

Parameters:

map - The mappings for reset in this state

putAll

void putAll(Map<K,V> map)

Copies all of the mappings from the given map into the state.

Parameters:

map - The mappings to be stored in this state

remove

void remove(K key)

Deletes the mapping of the given key.

Parameters:

key - The key of the mapping

contains

default boolean contains(K key)

Returns whether there exists the given mapping.

Parameters:

key - The key of the mapping

Returns:

True if there exists a mapping whose key equals to the given key

entries

default Iterable<Map.Entry<K,V>> entries()

Returns all the mappings in the state

Returns:

An iterable view of all the key-value pairs in the state.

keys

default Iterable<K> keys()

Returns all the keys in the state

Returns:

An iterable view of all the keys in the state.

values

default Iterable<V> values()

Returns all the values in the state.

Returns:

An iterable view of all the values in the state.

iterator

default Iterator<Map.Entry<K,V>> iterator()

Iterates over all the mappings in the state.

Returns:

An iterator over all the mappings in the state