Get properties angular 2

[Martin Peveri]

Hi everyone, how i can get properties of my component?. 

I have something, but does not convince me. It works well, but do not know if it's right.

import {bootstrap, Component, ElementRef, View} from 'angular2/angular2'

@Component({

  selector: 'contact-form',

  properties: [

    'title',

    'firstname',

    'lastname',

    'email',

    'message',

    'send',

    'url',

    'method'

  ]

})

@View({

  templateUrl: "components/ng2-contact-form/template/contact-form.html"

})

class ComponentContactForm {

  private title:string;

  private firstname:string;

  private lastname:string;

  private email:string;

  private message:string;

  private send:string;

  private url:string;

  private method:string;

  constructor(private element:ElementRef) {

    this.title = this.element.nativeElement.title;

    this.firstname = this.element.nativeElement.getAttribute("firstname");

    this.lastname = this.element.nativeElement.getAttribute("lastname");

    this.email = this.element.nativeElement.getAttribute("email");

    this.send = this.element.nativeElement.getAttribute("send");

    this.message = this.element.nativeElement.getAttribute("message");

    this.url = this.element.nativeElement.getAttribute("url");

    this.method = this.element.nativeElement.getAttribute("method");

    this.title = typeof this.title !== 'undefined' ? this.title : "Title";

    this.firstname = typeof this.firstname !== 'undefined' ? this.firstname : "First Name";

    this.lastname = typeof this.lastname !== 'undefined' ? this.lastname : "Last Name";

    this.email = typeof this.email !== 'undefined' ? this.email : "Email";

    this.send = typeof this.send !== 'undefined' ? this.send : "Send";

    this.message = typeof this.message !== 'undefined' ? this.message : "Message";

    this.url = typeof this.url !== 'undefined' ? this.url : "/send/";

    this.method = typeof this.method !== 'undefined' ? this.method : "POST";

  }

}

bootstrap(ComponentContactForm);

There is a better way to do this ?.

Thanks!