JsonPersistenceMiddleware<T> class

Convenience middleware for persisting reactons with JSON serialization.

final settingsReacton = reacton(
  Settings.defaults(),
  options: ReactonOptions(
    middleware: [
      JsonPersistenceMiddleware(
        storage: memoryStorage,
        key: 'settings',
        toJson: (s) => s.toJson(),
        fromJson: (j) => Settings.fromJson(j),
      ),
    ],
  ),
);

Inheritance

• Object
• Middleware<T>
• PersistenceMiddleware<T>
• JsonPersistenceMiddleware

Constructors

JsonPersistenceMiddleware({required StorageAdapter storage, required String key, required Map<String, dynamic> toJson(T), required T fromJson(Map<String, dynamic>)})

Properties

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

onAfterWrite(ReactonBase<T> reacton, T value) → void

Called after a value has been written and propagated.

inherited

onBeforeWrite(ReactonBase<T> reacton, T currentValue, T newValue) → T

Called before a value is written to the reacton. Return the (possibly modified) value, or throw to reject the write.

inherited

onDispose(ReactonBase<T> reacton) → void

Called when the reacton is disposed from the store.

inherited

onError(ReactonBase<T> reacton, Object error, StackTrace stackTrace) → void

Called when an error occurs during computation.

inherited

onInit(ReactonBase<T> reacton, T initialValue) → T

Called when the reacton is first initialized. Return the initial value (possibly modified).

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited