如何使用Symfony序列化器反序列化复杂对象的数组？

Question

我如何反序列化此XML

<Outer>
   <simpleProperty1>A</simpleProperty1>
   <simpleProperty2>B</simpleProperty2>
   <Inner>
      <simpleProperty3>C</simpleProperty3>
      <simpleProperty4>D</simpleProperty4>
   </Inner>
   <Inner>
      <simpleProperty3>E</simpleProperty3>
      <simpleProperty4>F</simpleProperty4>
   </Inner>
</Outer>

进入一些PHP类：

class Outer 
{
   /** @var string */
   private $simpleProperty1;
   /** @var string */
   private $simpleProperty2;
   /** @var Inner[] */
   private $inners;

   [insert getters and setters here]
}

class Inner 
{
   /** @var string */
   private $simpleProperty3;
   /** @var string */
   private $simpleProperty4;

   [insert getters and setters here]
}

使用Symfony序列化器 ？

填充了外部对象及其简单属性，但是代替了内部对象，我得到了一个关联数组，该数组包含两个另外的关联数组，分别包含simpleProperty3和simpleProperty4 。

Answer 1

我能够通过将序列化程序指向正确类型的自定义PropertyExtractor来解决该问题：

$encoders = [new XmlEncoder('response', LIBXML_NOERROR)];
$normalizers = [
    new ArrayDenormalizer(),
    new ObjectNormalizer(null, null, null, 
      new class implements PropertyTypeExtractorInterface
        {
          private $reflectionExtractor;

          public function __construct()
          {
              $this->reflectionExtractor = new ReflectionExtractor();
          }

          public function getTypes($class, $property, array $context = array())
          {
              if (is_a($class, Outer::class, true) && 'Inner' === $property) {
                return [
                  new Type(Type::BUILTIN_TYPE_OBJECT, true, Inner::class . "[]")
                ];
              }
              return $this->reflectionExtractor->getTypes($class, $property, $context);
          }
        })
    ];
$this->serializer = new Serializer($normalizers, $encoders);