UserInterface equals method

gistfile1.aw

<?php

class User implements UserInterface
{
    // ...
    
    /**
     * Compares this user to another to determine if they are the same.
     * 
     * @param  UserInterface $user
     * @return boolean True if equal, false otherwise.
     */
    public function equals(UserInterface $user)
    {
   	return
            md5($user->getUsername()) == md5($this->getUsername()) &&
            md5(serialize($user->getRoles())) == md5(serialize($this->getRoles()));
    }
    
    // ...
}