多餘的getter和setter

我執行我的PHP應用程序的延遲初始化和依賴注入模式的時刻，面臨着以下問題：多餘的getter和setter

每個類都有一堆getter和setter方法提供外部類的對象。有沒有一種優雅的方式來消除這種「冗餘」的父級或某種工廠？

編輯：沒有鬆動可測試性;-)的優點

EDIT2：這裏是一個getter和setter方法的一個例子如我使用它們：

function getSql() { 
    if (is_object($this->sql) === FALSE) { 
     $registry = \Registry::getInstance(); 
     $factories = $registry->get('factories'); 
     $database = $factories['databaseSql']; 
     $this->sql = $database->getSql(); 
    } 

    return $this->sql; 
} 

function setSql($sqlObject) { 
    // ... some checks 
    $this->sql = $sqlObject; 
}

EDIT3我跟着使用的想法性狀所以這裏使用了類「註冊」一性狀的樣品溶液：

trait Registration { 

    private $registration = null; 

    public function getRegistration() { 
     $registry = \Registry::getInstance(); 
     $factories = $registry->get('factories'); 

     if (is_object($this->registration) === TRUE) { 
      // get obect if instance already exists 
      $registration = $this->registration; 
     } else if (isset($factories['registration']) === TRUE) { 
      // get object using the matching factory 
      $registrationFactory = $factories['registration']; 
      $registration = $registrationFactory->getRegistration(); 
     } else if (class_exists('\engine\classes\Registration') === TRUE) { 
      // get object using the default object class when no specific factory is defined 
      $registration = new \engine\classes\Registration(); 
     } else { 
      throw new \Exception('error getting an instance of Registration'); 
     } 

     $this->registration = $registration; 

     return $registration; 
    } 

    public function setRegistration($object) { 
     if (is_object($object) === FALSE) 
      throw new \Exception('invalid registration object'); 

     $this->registration = $object; 
    } 
}

使用

class Foo { 
    use Registration; 

    public function bar() { 
     $reg = $this->getRegistration(); 
     // ... use instance of Registration 
    } 
}

來源

2013-04-03 gro