TransformingConsumer<T> class
abstract
Transforming operation that produces the original value unchanged, executing a given additional action.
class PrintConsumer extends TransformingConsumer<int> {
@override
void onAction(int value) {
print("New value: ${value}");
}
}
void main() async {
final Stream<int> stream = Stream
.fromIterable([1, 7, 2, 5])
.transform(PrintConsumer());
final List<String> values = await stream.toList();
// New value: 1
// New value: 7
// New value: 2
// New value: 5
print(values); // [1, 7, 2, 5]
}
- Inheritance
-
- Object
- StreamTransformerBase<
T, T> - TransformingFunction<
T, T> - TransformingUnaryOperator<
T> - TransformingConsumer
Constructors
- TransformingConsumer()
- TransformingConsumer.parameter(void onAction(T))
-
factory
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
bind(
Stream< T> stream) → Stream<T> -
Transforms the provided
stream
.inherited -
cast<
RS, RT> () → StreamTransformer< RS, RT> -
Provides a
StreamTransformer<RS, RT>
view of this stream transformer.inherited -
dispose(
) → Future< void> -
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
onAction(
T value) → void -
onValue(
T value) → Iterable< T> -
override
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited