Law of Demeter - Data objects

Question

I\'m trying to follow the Law Of Demeter ( see http://en.wikipedia.org/wiki/Law_of_Demeter , http://misko.hevery.com/code-reviewers-guide/flaw-digging-into-collaborators/ ) as I

Answer 1

You're correct and you'll most likely model your value objects something like this

class Order {
    User user;
}

class User {
    Address shippingAddress;
    Address deliveryAddress;
}

class Address {
    String city;
    ...
}

When you start considering how you will persist this data to a database (e.g. ORM) do you start thinking about performance. Think eager vs lazy loading trade offs.