MapStream<K, V> class

A Map that supports listening to changes.

Implemented types

• Map<K, V?>

Constructors

MapStream()

Creates an empty MapStream

MapStream.from(Map<K, V?> other)

Creates a MapStream with the same keys and values as other.

MapStream.typeSafe([Map<K, V?>? other])

Creates a type safe MapStream.

Properties

entries → Iterable<MapEntry<K, V?>>

The map entries of this.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

hasListener → bool

Whether there are any subscribers.

no setter

isClosed → bool

Whether the stream controller is closed for adding more events.

no setter

isEmpty → bool

Whether there is no key/value pair in the map.

no setter, override

isNotEmpty → bool

Whether there is at least one key/value pair in the map.

no setter, override

keys → Iterable<K>

The keys of this.

no setter, override

length → int

The number of key/value pairs in the map.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

typeSafe ↔ bool

Flag whether typeChecking is performed on updates.

getter/setter pair

values → Iterable<V?>

The values of this.

no setter, override

Methods

addAll(Map<K, V?> other) → void

Adds all key/value pairs of other to this.

override

addEntries(Iterable<MapEntry<K, V?>> newEntries) → void

Adds all key/value pairs of newEntries to this.

override

asBroadcastStream() → Stream<MapUpdate<K, V?>>

Returns a multi-subscription stream that emits the MapUpdates.

cast<RK, RV>() → Map<RK, RV>

Unsupported for MapStream

override

clear() → void

Removes all entries from the map.

override

close() → Future

Closes all attached streams.

connect(K key, Stream<V> stream) → void

Connect a stream to a key in the map.

containsKey(Object? key) → bool

Whether this map contains the given key.

override

containsValue(Object? value) → bool

Whether this map contains the given value.

override

disconnect(K key) → void

Disconnect a connected stream from a key in the map.

disconnectAll() → void

Disconnect all connected streams

forEach(void action(K key, V? value)) → void

Applies action to each key/value pair of the map.

override

listen(void onUpdate(MapUpdate mapUpdate), [List? keys]) → StreamSubscription<MapUpdate<K, V?>>

Adds a subscription to this MapStream's stream.

map<K2, V2>(MapEntry<K2, V2> convert(K key, V? value)) → Map<K2, V2>

Returns a new Map where all entries of this MapStream are transformed by the given convert function.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

putIfAbsent(K key, V? ifAbsent()) → V?

Look up the value of key, or add a new entry if it isn't there.

override

remove(Object? key) → V?

Removes key and its associated value, if present, from the map.

override

removeWhere(bool test(K key, V? value)) → void

Removes all entries of this map that satisfy the given test.

override

resend(K key) → void

Sends a MapUpdate down the stream with the key's MapEntry

resendAll() → void

Sends an empty MapUpdate down the stream to all attached listeners.

revert(K key) → void

Reverts key back to that in defaultMap.

revertAll() → void

Reverts all values back to defaultMap.

toMap() → Map<K, V?>

Returns this MapStream as a Dart Map.

toString() → String

Returns a string representation of this object.

override

update(K key, V? update(V? value), {V? ifAbsent()?}) → V?

Updates the value for the provided key.

override

updateAll(V? update(K key, V? value)) → void

Updates all values.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

operator [](Object? key) → V?

The value for the given key, or null if key is not in the map.

override

operator []=(K key, V? value) → void

Adds key/value pair to this.

override