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<?php |
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/* |
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* (c) Kévin Dunglas <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Dunglas\DoctrineJsonOdm\Normalizer; |
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use Symfony\Component\Serializer\Normalizer\DenormalizerInterface; |
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use Symfony\Component\Serializer\Normalizer\NormalizerInterface; |
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use Symfony\Component\Serializer\SerializerAwareInterface; |
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use Symfony\Component\Serializer\SerializerInterface; |
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/** |
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* Transforms an object to an array with the following keys: |
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* * _type: the class name |
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* * _value: a representation of the values of the object. |
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* |
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* @author Kévin Dunglas <[email protected]> |
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*/ |
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final class ObjectNormalizer implements NormalizerInterface, DenormalizerInterface, SerializerAwareInterface |
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{ |
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/** |
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* @var SerializerInterface |
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*/ |
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private $serializer; |
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private $objectNormalizer; |
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public function __construct(NormalizerInterface $objectNormalizer) |
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{ |
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if (!$objectNormalizer instanceof DenormalizerInterface) { |
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throw new \InvalidArgumentException(sprintf('The normalizer used must implement the "%s" interface.', DenormalizerInterface::class)); |
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} |
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$this->objectNormalizer = $objectNormalizer; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function normalize($object, $format = null, array $context = []) |
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{ |
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return [ |
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'_type' => get_class($object), |
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'_value' => $this->objectNormalizer->normalize($object, $format, $context), |
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]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function supportsNormalization($data, $format = null) |
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{ |
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return is_object($data); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function denormalize($data, $class, $format = null, array $context = []) |
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{ |
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if (isset($data['_value']) && isset($data['_type']) && is_array($data['_value'])) { |
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$data['_value'] = $this->denormalize($data['_value'], $data['_type'], $format, $context); |
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$data = $this->objectNormalizer->denormalize($data['_value'], $data['_type'], $format, $context); |
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return $data; |
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} |
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if (is_array($data) || $data instanceof \Traversable) { |
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foreach ($data as $key => $value) { |
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$data[$key] = $this->serializer->denormalize($value, $class, $format, $context); |
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} |
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} |
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return $data; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function supportsDenormalization($data, $type, $format = null) |
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{ |
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return true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function setSerializer(SerializerInterface $serializer) |
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{ |
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$this->serializer = $serializer; |
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if ($this->objectNormalizer instanceof SerializerAwareInterface) { |
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$this->objectNormalizer->setSerializer($serializer); |
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} |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: