3
我执行我的PHP应用程序的延迟初始化和依赖注入模式的时刻,面临着以下问题:多余的getter和setter
每个类都有一堆getter和setter方法提供外部类的对象。有没有一种优雅的方式来消除这种“冗余”的父级或某种工厂?
编辑:没有松动可测试性;-)的优点
EDIT2:这里是一个getter和setter方法的一个例子如我使用它们:
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状所以这里使用了类“注册”一性状的样品溶液:
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
}
}
我添加了一个例子,将通过你提到的链接阅读。我知道继承,魔术获得者和二传手。 – gro
当这个getter/setter对有一个特性用于每当另一个类需要这样一个对象时,它会很好吗? – gro