LceState<DATA extends Object> class abstract

State for 'Loading-Content-Error' resource which retrieves DATA

Implementers

• LceContent
• LceError
• LceLoading
• LceTerminated

Available extensions

• LceStateUtils

Constructors

LceState.content(DATA data, bool dataIsValid)

DATA is loaded data State data dataIsValid Data validity at the time of emission

const

factory

LceState.error(DATA? data, bool dataIsValid, Exception error)

DATA load error. May contain some data if cached data State data dataIsValid Data validity at the time of emission error Error occurred

const

factory

LceState.loading(DATA? data, bool dataIsValid, [LoadingType type])

DATA is loading data is the current data if any dataIsValid Data validity at the time of emission type Loading type

const

factory

LceState.terminated()

Creates a terminating state that signals emission finish

const

factory

Properties

data → DATA?

State data

final

dataIsValid → bool

A property that is evaluated internally and may mean that data being emitted is stall, invalidated or otherwise 'not-so-valid' until some further emission (say after network reload).

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toError(Exception error) → LceError<DATA>

Transfers to LceError state with error preserving data

toLoading([LoadingType type = LoadingType.loading]) → LceLoading<DATA>

Transfers to LceLoading state with loading type preserving data

toString() → String

A string representation of this object.

inherited

when<T extends Object>({required T loading(LceLoading<DATA> state), required T content(LceContent<DATA> state), required T error(LceError<DATA> state), T terminated()?}) → T

Emulates sealed class with every state callback required except terminated. Override it if you expect termination or leave empty to throw exception

whenElse<T extends Object>({T loading(LceLoading<DATA> state)?, T content(LceContent<DATA> state)?, T error(LceError<DATA> state)?, T terminated()?, required T onElse(LceState<DATA> state)}) → T

Emulates sealed class with only one onElse callback required. Every unset callback will be routed to onElse case.

Operators

operator ==(Object other) → bool

The equality operator.

inherited