CallbackObserver<T> class

A simple Observer implementation using callbacks.

Use this when you don't want to create a custom Observer class.

Example:

final observer = CallbackObserver<User>(
  onDataCallback: (user) => print('Got user: ${user.name}'),
  onErrorCallback: (failure) => print('Error: $failure'),
  onDoneCallback: () => print('Done'),
);

Inheritance

• Object
• Observer<T>
• CallbackObserver

Constructors

CallbackObserver({required void onDataCallback(T data), void onErrorCallback(AppFailure failure)?, void onDoneCallback()?})

Create a CallbackObserver with the given callbacks.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

onDataCallback → void Function(T data)

Callback for data events

final

onDoneCallback → void Function()?

Callback for done events

final

onErrorCallback → void Function(AppFailure failure)?

Callback for error events

final

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

onData(T data) → void

Called when a new value is emitted.

override

onDone() → void

Called when the stream completes.

override

onError(AppFailure failure) → void

Called when an error occurs.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited