RunnableMapInputStream<RunInput extends Object, RunOutput extends Object> class

A RunnableMapInputStream allows you to map the input stream to a different stream of values.

You can create a RunnableMapInputStream using the Runnable.mapInputStream static method.

When you call stream on a RunnableMapInputStream, it will take the input stream it receives and returns the output stream returned by the given inputStreamMapper function.

Example:

final model = ChatOpenAI(
  apiKey: openAiApiKey,
  defaultOptions: ChatOpenAIOptions(
    responseFormat: ChatOpenAIResponseFormat(
      type: ChatOpenAIResponseFormatType.jsonObject,
    ),
  ),
);
final parser = JsonOutputParser<ChatResult>();
final mapper = Runnable.mapInputStream((Stream<Map<String, dynamic>> inputStream) async* {
  yield await inputStream.last;
});

final chain = model.pipe(parser).pipe(mapper);

final stream = chain.stream(
  PromptValue.string(
    'Output a list of the countries france, spain and japan and their '
        'populations in JSON format. Use a dict with an outer key of '
        '"countries" which contains a list of countries. '
        'Each country should have the key "name" and "population"',
  ),
);
await stream.forEach((final chunk) => print('$chunk|'));
// {countries: [{name: France, population: 65273511}, {name: Spain, population: 46754778}, {name: Japan, population: 126476461}]}|
Inheritance
Available extensions

Constructors

RunnableMapInputStream(Stream<RunOutput> inputStreamMapper(Stream<RunInput> inputStream))
A RunnableMapInputStream allows you to map the input stream to a different stream of values.
const

Properties

defaultOptions → RunnableOptions
The default options to use when invoking the Runnable.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
inputStreamMapper → Stream<RunOutput> Function(Stream<RunInput> inputStream)
The stream transformer to run.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

batch(List<RunInput> inputs, {List<RunnableOptions>? options}) → Future<List<RunOutput>>
Batches the invocation of the Runnable on the given inputs.
inherited
bind(RunnableOptions options) → RunnableBinding<RunInput, RunnableOptions, RunOutput>
Binds the Runnable to the given options.
inherited
close() → void
Cleans up any resources associated with it the Runnable.
inherited
getCompatibleOptions(RunnableOptions? options) → RunnableOptions?
Returns the given options if they are compatible with the Runnable, otherwise returns null.
inherited
invoke(RunInput input, {RunnableOptions? options}) → Future<RunOutput>
Invokes the RunnableMapInputStream on the given input.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pipe<NewRunOutput extends Object?, NewCallOptions extends RunnableOptions>(Runnable<RunOutput, NewCallOptions, NewRunOutput> next) → RunnableSequence<RunInput, NewRunOutput>
Pipes the output of this Runnable into another Runnable using a RunnableSequence.
inherited
stream(RunInput input, {RunnableOptions? options}) → Stream<RunOutput>
Streams the input through the RunnableMapInputStream.
override
streamFromInputStream(Stream<RunInput> inputStream, {RunnableOptions? options}) → Stream<RunOutput>
Streams the inputStream through the RunnableMapInputStream.
override
toString() → String
A string representation of this object.
inherited
withFallbacks(List<Runnable<RunInput, RunnableOptions, RunOutput>> fallbacks) → RunnableWithFallback<RunInput, RunOutput>
Adds fallback runnables to be invoked if the primary runnable fails.
inherited
withRetry({int maxRetries = 3, FutureOr<bool> retryIf(Object e)?, List<Duration?>? delayDurations, bool addJitter = false}) → RunnableRetry<RunInput, RunOutput>
Adds retry logic to an existing runnable.
inherited

Operators

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