Best practise to transform native array/object into Ember.Array/Ember.Object

I have an ember component expecting a parameter as an array of objects. By default, this parameter is gonna be a native array with native objects inside. I'd like to transform this array into an ember array containing ember objects.

I was thinking about something like that, but this will create an infinite loop firing the observer every time:

export default Ember.Component.extend({
   content: null,

   contentDidChange: function () {
        var content = Ember.A();
        this.get('content').forEach(function (item) {
            content.addObject((item.constructor.toString() !== 'Ember.Object') ? Ember.Object.create(item) : item);
        });
        this.set('content', content);
    }.observes('content'),
});

What is the best practise to do that?

Thanks