ezy_di 0.0.4

Dependency Injection Tools for Dart

Dependency Injection

import 'package:ezy_di/ezy_di.dart';

final injector = Injector();
Animal animal = injector.get<Animal>();

// is equal to 

Animal animal = Animal(
  Dog(Walk()), 
  Fish(Swim()), 
  Bird(Fly()), 
  Duck(
    Swim(), 
    walk: Walk(), 
    fly: Fly(),
  ),
);

As you can see in example you do not need to add dependencies to the injector. Injector itselft is smart enough to get required dependencies and inject to the requested class.

Full Example

class Animal {
  final Dog dog;
  final Fish fish;
  final Bird bird;
  final Duck duck;

  const Animal(this.dog, this.fish, this.bird, this.duck);
}

class Bird {
  final Fly fly;
  Bird(this.fly);
}

class Dog {
  final Walk walk;
  Dog(this.walk);
}

class Duck {
  final Swim swim;
  final Walk walk;
  final Fly? fly;
  Duck(this.swim, {required this.walk, this.fly});
}

class Fish {
  final Swim swim;
  Fish(this.swim);
}

class Fly {
  start() {
    return "flying";
  }
}

class Swim {
  start() {
    return "swimming";
  }
}

@Singleton()
class Walk {

  const Walk() {
    print('this class will create only once and share with other classes').
  }

  start() {
    return "walking";
  }
}

void main() {
    final injector = Injector();
    Animal animal = injector.get<Animal>();
    animal.bird.fly.start() // flying
    animal.fish.swim.start() // swimming
}

Support Singleton provider

@Singleton()
class Walk {

  const Walk() {
    print('this class will create only once and share with other classes').
  }

  start() {
    return "walking";
  }
}

Support both positional and named params

class Duck {
  final Swim swim;
  final Walk walk;
  final Fly? fly;
  Duck(this.swim, {required this.walk, this.fly});
}