38 lines
1.1 KiB
PHP
38 lines
1.1 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Serializer\Normalizer;
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trait ObjectToPopulateTrait
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{
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/**
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* Extract the `object_to_populate` field from the context if it exists
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* and is an instance of the provided $class.
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*
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* @param string $class The class the object should be
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* @param $context The denormalization context
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* @param string $key They in which to look for the object to populate.
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* Keeps backwards compatibility with `AbstractNormalizer`.
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*
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* @return object|null an object if things check out, null otherwise
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*/
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protected function extractObjectToPopulate($class, array $context, $key = null)
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{
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$key = $key ?: 'object_to_populate';
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if (isset($context[$key]) && \is_object($context[$key]) && $context[$key] instanceof $class) {
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return $context[$key];
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}
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return null;
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}
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}
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