这里,我正在构建用于 REST API 的 Symfony SDK。大部分数据都是带有嵌套其他 JSON 对象的 JSON 对象。像这样
{
"id": "eng_pl",
"name": "Premier League",
"_links": {
"self": {
"href": "/tournaments/eng_pl"
},
"seasons": {
"href": "/tournaments/eng_pl/seasons/"
}
},
"coverage": {
"id": "eng",
"name": "England",
"_links": {
"self": {
"href": "/territories/eng"
}
}
}
}
反序列化必须生成一个等于以下代码生成的对象的对象:
$tournament = new Tournament();
$tournament->setId('eng_pl');
$tournament->setName('Premier League');
$coverage = new Territory();
$coverage->setId('eng');
$coverage->setName('England');
$tournament->setCoverage($coverage);
我正在使用自己的自定义反规范化器,以下是比赛对象(Tournament objects)的反规范化器代码片段:
class TournamentDenormalizer implements DenormalizerInterface
{
/**
* @inheritdoc
*/
public function supportsDenormalization($object, $type, $format = null)
{
if ($type != Tournament::class) {
return false;
}
return true;
}
/**
* @inheritdoc
* @return Tournament
*/
public function denormalize($object, $class, $format = null, array $context = array())
{
$tournament = new Tournament();
$tournament->setId($object->id);
$tournament->setName($object->name);
if (isset($object->coverage)) {
/** @var Territory $coverage */
$coverage = ???; //HOWTO how to implement Territory denormalization here???
$tournament->setCoverage(
$coverage
);
}
return $tournament;
}
}
问题是如何在TournamentDenormalizer中访问TerritoryDenormalizer?我看到了两个选项:
第一种(我现在正在使用)是将implements DenormalizerAwareInterface
添加到反序列化器类的签名中,并依赖于Symfony\Component\Serializer\Serializer
类:$serializer = new Symfony\Component\Serializer\Serializer(
[
new TournamentDenormalizer(),
new TerritoryDenormalizer()
], [
new Symfony\Component\Serializer\Encoder\JsonDecode()
]
);
$serializer->deserialize($json, Tournament::class, 'json');
因此在 TournamentDeserializer
中,它将会像这样:
if (isset($object->coverage)) {
/** @var Territory $coverage */
$coverage = $this->denormalizer->denormalize(
$object->coverage,
Territory::class,
$format,
$context
);
$tournament->setCoverage(
$coverage
);
}
}
第二种方法是明确地注入必要的反规范化器。
$tournamentDenormalizer = new TournamentDenormalizer();
$tournamentDenormalizer->setTerritoryDenormalizer(new TerritoryDenormalizer());
所以在TournamentDeserializer
中,它将像这样:
if (isset($object->coverage)) {
/** @var Territory $coverage */
$coverage = $this->territoryDenormalizer->denormalize(
$object->coverage,
Territory::class,
$format,
$context
);
$tournament->setCoverage(
$coverage
);
}
}
哪种方法是最好的?有哪些可能的替代方案?