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/Dart 2

StreamView<T> class

Stream wrapper that only exposes the Stream interface.

Inheritance

Constructors

StreamView(Stream<T> stream)
const

Properties

isBroadcastbool
read-only, override
Whether this stream is a broadcast stream.
firstFuture<T>
read-only, inherited
The first element of this stream. [...]
hashCodeint
read-only, inherited
The hash code for this object. [...]
isEmptyFuture<bool>
read-only, inherited
Whether this stream contains any elements. [...]
lastFuture<T>
read-only, inherited
The last element of this stream. [...]
lengthFuture<int>
read-only, inherited
The number of elements in this stream. [...]
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.
singleFuture<T>
read-only, inherited
The single element of this stream. [...]

Methods

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

Operators

operator ==(dynamic other) → bool
inherited
The equality operator. [...]

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-async/StreamView-class.html