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src/Normalizer/ObjectNormalizer.php (1 issue)

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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);
0 ignored issues
show
It seems like you code against a concrete implementation and not the interface Symfony\Component\Serializer\SerializerInterface as the method denormalize() does only exist in the following implementations of said interface: Symfony\Component\Serializer\Serializer.

Let’s take a look at an example:

interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

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

  1. Change the type-hint for the parameter:

    class AuthSystem
    {
        public function authenticate(MyUser $user) { /* ... */ }
    }
    
  2. Add an additional type-check:

    class AuthSystem
    {
        public function authenticate(User $user)
        {
            if ($user instanceof MyUser) {
                $this->logger->info(/** ... */);
            }
    
            // or alternatively
            if ( ! $user instanceof MyUser) {
                throw new \LogicException(
                    '$user must be an instance of MyUser, '
                   .'other instances are not supported.'
                );
            }
    
        }
    }
    
Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case.
  1. Add the method to the interface:

    interface User
    {
        /** @return string */
        public function getPassword();
    
        /** @return string */
        public function getDisplayName();
    }
    
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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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