--- /dev/null
+<?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
+{
+ /**
+ * @var LoaderInterface
+ */
+ private $loader;
+
+ /**
+ * @var Cache
+ */
+ private $cache;
+
+ /**
+ * @var array
+ */
+ private $loadedClasses;
+
+ /**
+ * @param LoaderInterface $loader
+ * @param Cache|null $cache
+ */
+ public function __construct(LoaderInterface $loader, Cache $cache = null)
+ {
+ $this->loader = $loader;
+ $this->cache = $cache;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getMetadataFor($value)
+ {
+ $class = $this->getClass($value);
+ if (!$class) {
+ throw new InvalidArgumentException(sprintf('Cannot create metadata for non-objects. Got: "%s"', gettype($value)));
+ }
+
+ if (isset($this->loadedClasses[$class])) {
+ return $this->loadedClasses[$class];
+ }
+
+ if ($this->cache && ($this->loadedClasses[$class] = $this->cache->fetch($class))) {
+ return $this->loadedClasses[$class];
+ }
+
+ if (!class_exists($class) && !interface_exists($class)) {
+ throw new InvalidArgumentException(sprintf('The class or interface "%s" does not exist.', $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)
+ {
+ $class = $this->getClass($value);
+
+ return class_exists($class) || interface_exists($class);
+ }
+
+ /**
+ * Gets a class name for a given class or instance.
+ *
+ * @param mixed $value
+ *
+ * @return string|bool
+ */
+ private function getClass($value)
+ {
+ if (!is_object($value) && !is_string($value)) {
+ return false;
+ }
+
+ return ltrim(is_object($value) ? get_class($value) : $value, '\\');
+ }
+}