injector

Description:

injector

Injector 💉 #
Injector is a simple dependency injection lib for Dart.
It does not replace a complex dependency injection framework like Dagger, but it provides the basics that most apps need.
Feature requests are welcomed!
Internally the injector is a singleton that stores instances and builders in a Map.
Use registerDependency<Type>() to register the dependency.
Never ever try to register or get dependencies without the generic type! Dart allows it, but we don't ;)
All instances are lazy loaded, meaning that at the time you request the dependency the instance is created.
Get your dependency using get<Type>().
Usage #
A simple usage example:
// Register a dependency (Every time a new instance)
injector.registerDependency<Car>(() {
var engine = injector.get<Engine>();
var fuel = injector.get<Fuel>();
var driver = injector.get<Driver>();

return CarImpl(engine,fuel,driver);
});

// Register a singleton
injector.registerSingleton<Car>(() {
var engine = injector.get<Engine>();
var fuel = injector.get<Fuel>();
var driver = injector.get<Driver>();

return CarImpl(engine,fuel,driver);
});

// Use custom Factories by extending [Factory].
injector.register(CustomFactory(() => Engine()));

// Register your dependencies / singletons in the __main.dart__ file
copied to clipboard
Notice #
If you have an issue with getting dependencies from the injector, check that imports of your dependencies classes are absolute.
Good:
import 'package:<project_name>/some/package/<file_name>.dart';
Bad:
import '../../some/package/<file_name>.dart';
Features and bugs #
Please file feature requests and bugs at the issue tracker.