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vendor/symfony/serializer/Mapping/Factory/CacheClassMetadataFactory.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Mapping\Factory;
+
+use Psr\Cache\CacheItemPoolInterface;
+
+/**
+ * Caches metadata using a PSR-6 implementation.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class CacheClassMetadataFactory implements ClassMetadataFactoryInterface
+{
+    use ClassResolverTrait;
+
+    /**
+     * @var ClassMetadataFactoryInterface
+     */
+    private $decorated;
+
+    /**
+     * @var CacheItemPoolInterface
+     */
+    private $cacheItemPool;
+
+    public function __construct(ClassMetadataFactoryInterface $decorated, CacheItemPoolInterface $cacheItemPool)
+    {
+        $this->decorated = $decorated;
+        $this->cacheItemPool = $cacheItemPool;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMetadataFor($value)
+    {
+        $class = $this->getClass($value);
+        // Key cannot contain backslashes according to PSR-6
+        $key = strtr($class, '\\', '_');
+
+        $item = $this->cacheItemPool->getItem($key);
+        if ($item->isHit()) {
+            return $item->get();
+        }
+
+        $metadata = $this->decorated->getMetadataFor($value);
+        $this->cacheItemPool->save($item->set($metadata));
+
+        return $metadata;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasMetadataFor($value)
+    {
+        return $this->decorated->hasMetadataFor($value);
+    }
+}

vendor/symfony/serializer/Mapping/Factory/ClassMetadataFactory.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Mapping\Factory;
+
+use Doctrine\Common\Cache\Cache;
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+use Symfony\Component\Serializer\Mapping\ClassMetadata;
+use Symfony\Component\Serializer\Mapping\Loader\LoaderInterface;
+
+/**
+ * Returns a {@link ClassMetadata}.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class ClassMetadataFactory implements ClassMetadataFactoryInterface
+{
+    use ClassResolverTrait;
+
+    private $loader;
+    private $cache;
+    private $loadedClasses;
+
+    public function __construct(LoaderInterface $loader, Cache $cache = null)
+    {
+        $this->loader = $loader;
+        $this->cache = $cache;
+
+        if (null !== $cache) {
+            @trigger_error(sprintf('Passing a Doctrine Cache instance as 2nd parameter of the "%s" constructor is deprecated since Symfony 3.1. This parameter will be removed in Symfony 4.0. Use the "%s" class instead.', __CLASS__, CacheClassMetadataFactory::class), E_USER_DEPRECATED);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMetadataFor($value)
+    {
+        $class = $this->getClass($value);
+
+        if (isset($this->loadedClasses[$class])) {
+            return $this->loadedClasses[$class];
+        }
+
+        if ($this->cache && ($this->loadedClasses[$class] = $this->cache->fetch($class))) {
+            return $this->loadedClasses[$class];
+        }
+
+        $classMetadata = new ClassMetadata($class);
+        $this->loader->loadClassMetadata($classMetadata);
+
+        $reflectionClass = $classMetadata->getReflectionClass();
+
+        // Include metadata from the parent class
+        if ($parent = $reflectionClass->getParentClass()) {
+            $classMetadata->merge($this->getMetadataFor($parent->name));
+        }
+
+        // Include metadata from all implemented interfaces
+        foreach ($reflectionClass->getInterfaces() as $interface) {
+            $classMetadata->merge($this->getMetadataFor($interface->name));
+        }
+
+        if ($this->cache) {
+            $this->cache->save($class, $classMetadata);
+        }
+
+        return $this->loadedClasses[$class] = $classMetadata;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasMetadataFor($value)
+    {
+        try {
+            $this->getClass($value);
+
+            return true;
+        } catch (InvalidArgumentException $invalidArgumentException) {
+            // Return false in case of exception
+        }
+
+        return false;
+    }
+}

vendor/symfony/serializer/Mapping/Factory/ClassMetadataFactoryInterface.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Mapping\Factory;
+
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+use Symfony\Component\Serializer\Mapping\ClassMetadataInterface;
+
+/**
+ * Returns a {@see ClassMetadataInterface}.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+interface ClassMetadataFactoryInterface
+{
+    /**
+     * If the method was called with the same class name (or an object of that
+     * class) before, the same metadata instance is returned.
+     *
+     * If the factory was configured with a cache, this method will first look
+     * for an existing metadata instance in the cache. If an existing instance
+     * is found, it will be returned without further ado.
+     *
+     * Otherwise, a new metadata instance is created. If the factory was
+     * configured with a loader, the metadata is passed to the
+     * {@link \Symfony\Component\Serializer\Mapping\Loader\LoaderInterface::loadClassMetadata()} method for further
+     * configuration. At last, the new object is returned.
+     *
+     * @param string|object $value
+     *
+     * @return ClassMetadataInterface
+     *
+     * @throws InvalidArgumentException
+     */
+    public function getMetadataFor($value);
+
+    /**
+     * Checks if class has metadata.
+     *
+     * @param mixed $value
+     *
+     * @return bool
+     */
+    public function hasMetadataFor($value);
+}

vendor/symfony/serializer/Mapping/Factory/ClassResolverTrait.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Serializer\Mapping\Factory;
+
+use Symfony\Component\Serializer\Exception\InvalidArgumentException;
+
+/**
+ * Resolves a class name.
+ *
+ * @internal
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+trait ClassResolverTrait
+{
+    /**
+     * Gets a class name for a given class or instance.
+     *
+     * @param mixed $value
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException If the class does not exists
+     */
+    private function getClass($value)
+    {
+        if (\is_string($value)) {
+            if (!class_exists($value) && !interface_exists($value)) {
+                throw new InvalidArgumentException(sprintf('The class or interface "%s" does not exist.', $value));
+            }
+
+            return ltrim($value, '\\');
+        }
+
+        if (!\is_object($value)) {
+            throw new InvalidArgumentException(sprintf('Cannot create metadata for non-objects. Got: "%s"', \gettype($value)));
+        }
+
+        return \get_class($value);
+    }
+}