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| class CD {
public $band = '';
public $title = '';
protected $_mediator;
public function __construct(MusicContainerMediator $mediator = NULL) {
$this->_mediator = $mediator;
}
public function save() {
//具体实现待定
var_dump($this);
}
public function changeBandName($bandname) {
if ( ! is_null($this->_mediator)) {
$this->_mediator->change($this, array("band" => $bandname));
}
$this->band = $bandname;
$this->save();
}
}
//MP3Archive类
class MP3Archive {
protected $_mediator;
public function __construct(MusicContainerMediator $mediator = NULL) {
$this->_mediator = $mediator;
}
public function save() {
//具体实现待定
var_dump($this);
}
public function changeBandName($bandname) {
if ( ! is_null($this->_mediator)) {
$this->_mediator->change($this, array("band" => $bandname));
}
$this->band = $bandname;
$this->save();
}
}
//中介者类
class MusicContainerMediator {
protected $_containers = array();
public function __construct() {
$this->_containers[] = "CD";
$this->_containers[] = "MP3Archive";
}
public function change($originalObject, $newValue) {
$title = $originalObject->title;
$band = $originalObject->band;
foreach ($this->_containers as $container) {
if ( ! ($originalObject instanceof $container)) {
$object = new $container;
$object->title = $title;
$object->band = $band;
foreach ($newValue as $key => $val) {
$object->$key = $val;
}
$object->save();
}
}
}
}
//测试实例
$titleFromDB = "Waste of a Rib";
$bandFromDB = "Never Again";
$mediator = new MusicContainerMediator();
$cd = new CD($mediator);
$cd->title = $titleFromDB;
$cd->band = $bandFromDB;
$cd->changeBandName("Maybe Once More");
|
