AppComponentからServiceにアクセスするにはforwardRefを使う

hero.ts

import {bootstrap, Component, View, FORM_DIRECTIVES, CORE_DIRECTIVES, Inject, forwardRef} from 'angular2/angular2';

class Hero {
  id: number;
  name: string;
  birthday: Date;
}

@Component({
  selector: 'hero-app'
})

@View({
  templateUrl: 'app/app.html',
  styles: [`
    .heroes {list-style-type: none; margin-left: 1em; padding: 0; width: 10em;}
    .heroes li { cursor: pointer; position: relative; left: 0; transition: all 0.2s ease; }
    .heroes li:hover {color: #369; background-color: #EEE; left: .2em;}
    .heroes .badge {
      font-size: small;
      color: white;
      padding: 0.1em 0.7em;
      background-color: #369;
      line-height: 1em;
      position: relative;
      left: -1px;
      top: -1px;
    }
    .selected { background-color: #EEE; color: #369; }
    `],
  directives: [FORM_DIRECTIVES, CORE_DIRECTIVES]
})

class AppComponent {
  public title = 'Tour of Heroes';
  public heroes: Hero[];
  public selectedHero: Hero;

  constructor(@Inject(forwardRef(() => HeroService)) service) {
    this.heroes = service.getHeroes();
  }
  onSelect(hero: Hero) { this.selectedHero = hero; }
  getSelectedClass(hero: Hero) {
    return {
      'selected': hero === this.selectedHero
    };
  }
}

class HeroService {
  public heroes: Hero[];

  constructor() {
    this.heroes = [
      { id: 1, name: 'Mr nice', birthday: new Date(2015, 1, 1) },
      { id: 2, name: 'Mr nishio', birthday: new Date(2015, 1, 2) },
      { id: 3, name: 'Yamada', birthday: new Date(2015, 1, 2) }
    ];
  }

  getHeroes() {
    return this.heroes;
  }
}

bootstrap(AppComponent, [HeroService]);