ValueConnectableStream<T> class

A ConnectableStream that converts a single-subscription Stream into a broadcast Stream that replays the latest value to any new listener, and provides synchronous access to the latest emitted value.

Inheritance
Implemented types
Available extensions

Constructors

ValueConnectableStream(Stream<T> source, {bool sync = false})
Constructs a Stream which only begins emitting events when the connect method is called, this Stream acts like a BehaviorSubject.
ValueConnectableStream.seeded(Stream<T> source, T seedValue, {bool sync = false})
Constructs a Stream which only begins emitting events when the connect method is called, this Stream acts like a BehaviorSubject.seeded.

Properties

error Object
Returns last emitted error, failing if there is no error.
no setteroverride
errorOrNull Object?
Last emitted error, or null if no error added.
no setteroverride
first Future<T>
The first element of this stream.
no setterinherited
hasError bool
Returns true when error is available.
no setteroverride
hashCode int
The hash code for this object.
no setterinherited
hasValue bool
Returns true when value is available.
no setteroverride
isBroadcast bool
Whether this stream is a broadcast stream.
no setterinherited
isEmpty Future<bool>
Whether this stream contains any elements.
no setterinherited
last Future<T>
The last element of this stream.
no setterinherited
length Future<int>
The number of elements in this stream.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
single Future<T>
The single element of this stream.
no setterinherited
stackTrace StackTrace?
Returns StackTrace of the last emitted error, or null if no error added or the added error has no StackTrace.
no setteroverride
value → T
Returns the last emitted value, failing if there is no value. See hasValue to determine whether value has already been set.
no setteroverride
valueOrNull → T?
Returns either value, or null, should value not yet have been set.
no setteroverride

Methods

any(bool test(T element)) Future<bool>
Checks whether test accepts any element provided by this stream.
inherited
asBroadcastStream({void onListen(StreamSubscription<T> subscription)?, void onCancel(StreamSubscription<T> subscription)?}) Stream<T>
Returns a multi-subscription stream that produces the same events as this.
inherited
asyncExpand<E>(Stream<E>? convert(T event)) Stream<E>
Transforms each element into a sequence of asynchronous events.
inherited
asyncMap<E>(FutureOr<E> convert(T event)) Stream<E>
Creates a new stream with each data event of this stream asynchronously mapped to a new event.
inherited
autoConnect({void connection(StreamSubscription<T> subscription)?}) ValueStream<T>
Returns a Stream that automatically connects (at most once) to this ConnectableStream when the first Observer subscribes.
inherited
cast<R>() Stream<R>
Adapt this stream to be a Stream<R>.
inherited
connect() StreamSubscription<T>
Instructs the ConnectableStream to begin emitting items from the source Stream. To disconnect from the source stream, cancel the subscription.
inherited
contains(Object? needle) Future<bool>
Returns whether needle occurs in the elements provided by this stream.
inherited
distinct([bool equals(T previous, T next)?]) Stream<T>
Skips data events if they are equal to the previous data event.
inherited
drain<E>([E? futureValue]) Future<E>
Discards all data on this stream, but signals when it is done or an error occurred.
inherited
elementAt(int index) Future<T>
Returns the value of the indexth data event of this stream.
inherited
every(bool test(T element)) Future<bool>
Checks whether test accepts all elements provided by this stream.
inherited
expand<S>(Iterable<S> convert(T element)) Stream<S>
Transforms each element of this stream into a sequence of elements.
inherited
firstWhere(bool test(T element), {T orElse()?}) Future<T>
Finds the first element of this stream matching test.
inherited
fold<S>(S initialValue, S combine(S previous, T element)) Future<S>
Combines a sequence of values by repeatedly applying combine.
inherited
forEach(void action(T element)) Future<void>
Executes action on each element of this stream.
inherited
handleError(Function onError, {bool test(dynamic error)?}) Stream<T>
Creates a wrapper Stream that intercepts some errors from this stream.
inherited
join([String separator = ""]) Future<String>
Combines the string representation of elements into a single string.
inherited
lastWhere(bool test(T element), {T orElse()?}) Future<T>
Finds the last element in this stream matching test.
inherited
listen(void onData(T value)?, {Function? onError, void onDone()?, bool? cancelOnError}) StreamSubscription<T>
Adds a subscription to this stream.
inherited
map<S>(S convert(T event)) Stream<S>
Transforms each element of this stream into a new stream event.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pipe(StreamConsumer<T> streamConsumer) Future
Pipes the events of this stream into streamConsumer.
inherited
reduce(T combine(T previous, T element)) Future<T>
Combines a sequence of values by repeatedly applying combine.
inherited
refCount() ValueStream<T>
Returns a Stream that stays connected to this ConnectableStream as long as there is at least one subscription to this ConnectableStream.
inherited
singleWhere(bool test(T element), {T orElse()?}) Future<T>
Finds the single element in this stream matching test.
inherited
skip(int count) Stream<T>
Skips the first count data events from this stream.
inherited
skipWhile(bool test(T element)) Stream<T>
Skip data events from this stream while they are matched by test.
inherited
take(int count) Stream<T>
Provides at most the first count data events of this stream.
inherited
takeWhile(bool test(T element)) Stream<T>
Forwards data events while test is successful.
inherited
timeout(Duration timeLimit, {void onTimeout(EventSink<T> sink)?}) Stream<T>
Creates a new stream with the same events as this stream.
inherited
toList() Future<List<T>>
Collects all elements of this stream in a List.
inherited
toSet() Future<Set<T>>
Collects the data of this stream in a Set.
inherited
toString() String
A string representation of this object.
inherited
transform<S>(StreamTransformer<T, S> streamTransformer) Stream<S>
Applies streamTransformer to this stream.
inherited
where(bool test(T event)) Stream<T>
Creates a new stream from this stream that discards some elements.
inherited

Operators

operator ==(Object other) bool
The equality operator.
inherited