BaseAsyncState<S extends Object?> class abstract

Abstract base class for representing asynchronous state in a notifier or state management flow.

BaseAsyncState provides a common interface for handling loading, data, and error states in asynchronous operations, such as network requests or background computations.

S is the type of data managed by the state.

This class is typically extended or implemented by concrete async state classes. It enables pattern matching via when and whenData, and provides utility constructors and methods for transitioning between loading, data, and error states.

Implementers

Constructors

BaseAsyncState.new({required AsyncStatus status, S? data, ErrorState? errorState})
Creates a BaseAsyncState with optional data and errorState.
const
BaseAsyncState.data(S? data)
Creates a data state with the given data.
const
BaseAsyncState.error(ErrorState? errorState)
Creates an error state with the given errorState.
const
BaseAsyncState.loading()
Creates a loading state.
const

Properties

data → S?
The data held by the state, if any.
final
errorState → ErrorState?
The error information held by the state, if any.
final
hasError → bool
Returns true if the state represents an error.
no setter
hashCode → int
The hash code for this object.
no setteroverride
isLoading → bool
Returns true if the state is loading.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toData(S data) → AsyncState<S>
Returns a new state with the given data.
toError(Object error, {String? message, StackTrace? stackTrace}) → AsyncState<S>
Returns a new state representing an error with the given error.
toLoading() → AsyncState<S>
Returns a new state representing the loading state.
toString() → String
A string representation of this object.
inherited
when<T>({required T loading(), required T data(S data), required T error(ErrorState e)}) → T
Pattern matching for async state.
whenData<T>(void data(S data), {void loading()?, void error(ErrorState e)?}) → void
Optional pattern matching for async state, focused on data extraction.

Operators

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