gistfile1.php

<?php
interface DAOFactory 
{
    public function createAccessDAO();
    public function createClientDAO();
    public function createAddressDAO();
}

/**
 * Concrete AccessDAO
 */
class AccessDAO 
{
    /**
     * Retrieve instance of Access
     * @param  String $login
     * @return Access
     */
    public function getAccessByLogin($login)
    {

    }
}

/**
 * Concrete ClientDAO
 */
class ClientDAO 
{
    /**
     * Retrieve instance of Client
     * @param  int $id 
     * @return Client 
     */
    public function getById($id)
    {

    }
}

/**
 * Concrete AddressDAO
 */
class AddressDAO 
{
    /**
     * Retrieve instance of Address
     * @param  Access $access
     * @return Address
     */
    public function getByAccess(Access $access)
    {

    }
}


/**
 * Entity Access
 */
class Access {
    private $id;
    private $login;
    private $client;
    private $address;

    /**
     * DAO Objects
     */
    private $DAOFactory;
    private $clientDAO;
    private $addressDAO;


    public function getters() {
    }

    public function setters() {
    }

    public function setDAOFactory(DAOFactory $DAOFactory)
    {
        $this->DAOFactory = $DAOFactory;
    }

    private function checkDAOFactory()
    {
        if (!$this->DAOFactory instanceof DAOFactory) {
            throw RuntimeException("Set a DAOFactory.");
        }
        return $this->DAOFactory;
    }

    public function getClient()
    {
        if (!$this->clientDAO instanceof ClientDAO) {
            $this->clientDAO = $this->checkDAOFactory()->createClientDAO();
        }

        return $this->clientDAO->getById($this->client);;
    }

    public function getAddress()
    {
        if (!$this->addressDAO instanceof AddressDAO) {
            $this->addressDAO = $this->checkDAOFactory()->createAddressDAO();
        }

        return $this->addressDAO->getByAccess($this);
    }
}

/**
 * Entity Client
 */
class Client {

}

/**
 * Entity Address
 */
class Address {

}