Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Serializer\Normalizer;
Chris@0: 
Chris@0: use Symfony\Component\Serializer\Exception\CircularReferenceException;
Chris@0: use Symfony\Component\Serializer\Exception\InvalidArgumentException;
Chris@0: use Symfony\Component\Serializer\Exception\LogicException;
Chris@0: use Symfony\Component\Serializer\Exception\RuntimeException;
Chris@0: use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
Chris@0: use Symfony\Component\Serializer\Mapping\AttributeMetadataInterface;
Chris@0: use Symfony\Component\Serializer\NameConverter\NameConverterInterface;
Chris@0: use Symfony\Component\Serializer\SerializerAwareInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Normalizer implementation.
Chris@0:  *
Chris@0:  * @author Kévin Dunglas <dunglas@gmail.com>
Chris@0:  */
Chris@0: abstract class AbstractNormalizer extends SerializerAwareNormalizer implements NormalizerInterface, DenormalizerInterface, SerializerAwareInterface
Chris@0: {
Chris@0:     const CIRCULAR_REFERENCE_LIMIT = 'circular_reference_limit';
Chris@0:     const OBJECT_TO_POPULATE = 'object_to_populate';
Chris@0:     const GROUPS = 'groups';
Chris@0: 
Chris@0:     /**
Chris@0:      * @var int
Chris@0:      */
Chris@0:     protected $circularReferenceLimit = 1;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var callable
Chris@0:      */
Chris@0:     protected $circularReferenceHandler;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var ClassMetadataFactoryInterface|null
Chris@0:      */
Chris@0:     protected $classMetadataFactory;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var NameConverterInterface|null
Chris@0:      */
Chris@0:     protected $nameConverter;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var array
Chris@0:      */
Chris@0:     protected $callbacks = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * @var array
Chris@0:      */
Chris@0:     protected $ignoredAttributes = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * @var array
Chris@0:      */
Chris@0:     protected $camelizedAttributes = array();
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets the {@link ClassMetadataFactoryInterface} to use.
Chris@0:      *
Chris@0:      * @param ClassMetadataFactoryInterface|null $classMetadataFactory
Chris@0:      * @param NameConverterInterface|null        $nameConverter
Chris@0:      */
Chris@0:     public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null)
Chris@0:     {
Chris@0:         $this->classMetadataFactory = $classMetadataFactory;
Chris@0:         $this->nameConverter = $nameConverter;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Set circular reference limit.
Chris@0:      *
Chris@0:      * @param int $circularReferenceLimit limit of iterations for the same object
Chris@0:      *
Chris@0:      * @return self
Chris@0:      */
Chris@0:     public function setCircularReferenceLimit($circularReferenceLimit)
Chris@0:     {
Chris@0:         $this->circularReferenceLimit = $circularReferenceLimit;
Chris@0: 
Chris@0:         return $this;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Set circular reference handler.
Chris@0:      *
Chris@0:      * @param callable $circularReferenceHandler
Chris@0:      *
Chris@0:      * @return self
Chris@0:      */
Chris@0:     public function setCircularReferenceHandler(callable $circularReferenceHandler)
Chris@0:     {
Chris@0:         $this->circularReferenceHandler = $circularReferenceHandler;
Chris@0: 
Chris@0:         return $this;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Set normalization callbacks.
Chris@0:      *
Chris@0:      * @param callable[] $callbacks help normalize the result
Chris@0:      *
Chris@0:      * @return self
Chris@0:      *
Chris@0:      * @throws InvalidArgumentException if a non-callable callback is set
Chris@0:      */
Chris@0:     public function setCallbacks(array $callbacks)
Chris@0:     {
Chris@0:         foreach ($callbacks as $attribute => $callback) {
Chris@0:             if (!is_callable($callback)) {
Chris@0:                 throw new InvalidArgumentException(sprintf(
Chris@0:                     'The given callback for attribute "%s" is not callable.',
Chris@0:                     $attribute
Chris@0:                 ));
Chris@0:             }
Chris@0:         }
Chris@0:         $this->callbacks = $callbacks;
Chris@0: 
Chris@0:         return $this;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Set ignored attributes for normalization and denormalization.
Chris@0:      *
Chris@0:      * @param array $ignoredAttributes
Chris@0:      *
Chris@0:      * @return self
Chris@0:      */
Chris@0:     public function setIgnoredAttributes(array $ignoredAttributes)
Chris@0:     {
Chris@0:         $this->ignoredAttributes = $ignoredAttributes;
Chris@0: 
Chris@0:         return $this;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Detects if the configured circular reference limit is reached.
Chris@0:      *
Chris@0:      * @param object $object
Chris@0:      * @param array  $context
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      *
Chris@0:      * @throws CircularReferenceException
Chris@0:      */
Chris@0:     protected function isCircularReference($object, &$context)
Chris@0:     {
Chris@0:         $objectHash = spl_object_hash($object);
Chris@0: 
Chris@0:         if (isset($context[static::CIRCULAR_REFERENCE_LIMIT][$objectHash])) {
Chris@0:             if ($context[static::CIRCULAR_REFERENCE_LIMIT][$objectHash] >= $this->circularReferenceLimit) {
Chris@0:                 unset($context[static::CIRCULAR_REFERENCE_LIMIT][$objectHash]);
Chris@0: 
Chris@0:                 return true;
Chris@0:             }
Chris@0: 
Chris@0:             ++$context[static::CIRCULAR_REFERENCE_LIMIT][$objectHash];
Chris@0:         } else {
Chris@0:             $context[static::CIRCULAR_REFERENCE_LIMIT][$objectHash] = 1;
Chris@0:         }
Chris@0: 
Chris@0:         return false;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Handles a circular reference.
Chris@0:      *
Chris@0:      * If a circular reference handler is set, it will be called. Otherwise, a
Chris@0:      * {@class CircularReferenceException} will be thrown.
Chris@0:      *
Chris@0:      * @param object $object
Chris@0:      *
Chris@0:      * @return mixed
Chris@0:      *
Chris@0:      * @throws CircularReferenceException
Chris@0:      */
Chris@0:     protected function handleCircularReference($object)
Chris@0:     {
Chris@0:         if ($this->circularReferenceHandler) {
Chris@0:             return call_user_func($this->circularReferenceHandler, $object);
Chris@0:         }
Chris@0: 
Chris@0:         throw new CircularReferenceException(sprintf('A circular reference has been detected (configured limit: %d).', $this->circularReferenceLimit));
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets attributes to normalize using groups.
Chris@0:      *
Chris@0:      * @param string|object $classOrObject
Chris@0:      * @param array         $context
Chris@0:      * @param bool          $attributesAsString If false, return an array of {@link AttributeMetadataInterface}
Chris@0:      *
Chris@0:      * @return string[]|AttributeMetadataInterface[]|bool
Chris@0:      */
Chris@0:     protected function getAllowedAttributes($classOrObject, array $context, $attributesAsString = false)
Chris@0:     {
Chris@0:         if (!$this->classMetadataFactory || !isset($context[static::GROUPS]) || !is_array($context[static::GROUPS])) {
Chris@0:             return false;
Chris@0:         }
Chris@0: 
Chris@0:         $allowedAttributes = array();
Chris@0:         foreach ($this->classMetadataFactory->getMetadataFor($classOrObject)->getAttributesMetadata() as $attributeMetadata) {
Chris@0:             $name = $attributeMetadata->getName();
Chris@0: 
Chris@0:             if (
Chris@0:                 count(array_intersect($attributeMetadata->getGroups(), $context[static::GROUPS])) &&
Chris@0:                 $this->isAllowedAttribute($classOrObject, $name, null, $context)
Chris@0:             ) {
Chris@0:                 $allowedAttributes[] = $attributesAsString ? $name : $attributeMetadata;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $allowedAttributes;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Is this attribute allowed?
Chris@0:      *
Chris@0:      * @param object|string $classOrObject
Chris@0:      * @param string        $attribute
Chris@0:      * @param string|null   $format
Chris@0:      * @param array         $context
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      */
Chris@0:     protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
Chris@0:     {
Chris@0:         return !in_array($attribute, $this->ignoredAttributes);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Normalizes the given data to an array. It's particularly useful during
Chris@0:      * the denormalization process.
Chris@0:      *
Chris@0:      * @param object|array $data
Chris@0:      *
Chris@0:      * @return array
Chris@0:      */
Chris@0:     protected function prepareForDenormalization($data)
Chris@0:     {
Chris@0:         return (array) $data;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the method to use to construct an object. This method must be either
Chris@0:      * the object constructor or static.
Chris@0:      *
Chris@0:      * @param array            $data
Chris@0:      * @param string           $class
Chris@0:      * @param array            $context
Chris@0:      * @param \ReflectionClass $reflectionClass
Chris@0:      * @param array|bool       $allowedAttributes
Chris@0:      *
Chris@0:      * @return \ReflectionMethod|null
Chris@0:      */
Chris@0:     protected function getConstructor(array &$data, $class, array &$context, \ReflectionClass $reflectionClass, $allowedAttributes)
Chris@0:     {
Chris@0:         return $reflectionClass->getConstructor();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Instantiates an object using constructor parameters when needed.
Chris@0:      *
Chris@0:      * This method also allows to denormalize data into an existing object if
Chris@0:      * it is present in the context with the object_to_populate. This object
Chris@0:      * is removed from the context before being returned to avoid side effects
Chris@0:      * when recursively normalizing an object graph.
Chris@0:      *
Chris@0:      * @param array            $data
Chris@0:      * @param string           $class
Chris@0:      * @param array            $context
Chris@0:      * @param \ReflectionClass $reflectionClass
Chris@0:      * @param array|bool       $allowedAttributes
Chris@0:      * @param string|null      $format
Chris@0:      *
Chris@0:      * @return object
Chris@0:      *
Chris@0:      * @throws RuntimeException
Chris@0:      */
Chris@0:     protected function instantiateObject(array &$data, $class, array &$context, \ReflectionClass $reflectionClass, $allowedAttributes/*, $format = null*/)
Chris@0:     {
Chris@0:         if (func_num_args() >= 6) {
Chris@0:             $format = func_get_arg(5);
Chris@0:         } else {
Chris@0:             if (__CLASS__ !== get_class($this)) {
Chris@0:                 $r = new \ReflectionMethod($this, __FUNCTION__);
Chris@0:                 if (__CLASS__ !== $r->getDeclaringClass()->getName()) {
Chris@0:                     @trigger_error(sprintf('Method %s::%s() will have a 6th `$format = null` argument in version 4.0. Not defining it is deprecated since 3.2.', get_class($this), __FUNCTION__), E_USER_DEPRECATED);
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             $format = null;
Chris@0:         }
Chris@0: 
Chris@0:         if (
Chris@0:             isset($context[static::OBJECT_TO_POPULATE]) &&
Chris@0:             is_object($context[static::OBJECT_TO_POPULATE]) &&
Chris@0:             $context[static::OBJECT_TO_POPULATE] instanceof $class
Chris@0:         ) {
Chris@0:             $object = $context[static::OBJECT_TO_POPULATE];
Chris@0:             unset($context[static::OBJECT_TO_POPULATE]);
Chris@0: 
Chris@0:             return $object;
Chris@0:         }
Chris@0: 
Chris@0:         $constructor = $this->getConstructor($data, $class, $context, $reflectionClass, $allowedAttributes);
Chris@0:         if ($constructor) {
Chris@0:             $constructorParameters = $constructor->getParameters();
Chris@0: 
Chris@0:             $params = array();
Chris@0:             foreach ($constructorParameters as $constructorParameter) {
Chris@0:                 $paramName = $constructorParameter->name;
Chris@0:                 $key = $this->nameConverter ? $this->nameConverter->normalize($paramName) : $paramName;
Chris@0: 
Chris@0:                 $allowed = $allowedAttributes === false || in_array($paramName, $allowedAttributes);
Chris@0:                 $ignored = in_array($paramName, $this->ignoredAttributes);
Chris@0:                 if (method_exists($constructorParameter, 'isVariadic') && $constructorParameter->isVariadic()) {
Chris@0:                     if ($allowed && !$ignored && (isset($data[$key]) || array_key_exists($key, $data))) {
Chris@0:                         if (!is_array($data[$paramName])) {
Chris@0:                             throw new RuntimeException(sprintf('Cannot create an instance of %s from serialized data because the variadic parameter %s can only accept an array.', $class, $constructorParameter->name));
Chris@0:                         }
Chris@0: 
Chris@0:                         $params = array_merge($params, $data[$paramName]);
Chris@0:                     }
Chris@0:                 } elseif ($allowed && !$ignored && (isset($data[$key]) || array_key_exists($key, $data))) {
Chris@0:                     $parameterData = $data[$key];
Chris@0:                     try {
Chris@0:                         if (null !== $constructorParameter->getClass()) {
Chris@0:                             if (!$this->serializer instanceof DenormalizerInterface) {
Chris@0:                                 throw new LogicException(sprintf('Cannot create an instance of %s from serialized data because the serializer inject in "%s" is not a denormalizer', $constructorParameter->getClass(), static::class));
Chris@0:                             }
Chris@0:                             $parameterClass = $constructorParameter->getClass()->getName();
Chris@0:                             $parameterData = $this->serializer->denormalize($parameterData, $parameterClass, $format, $context);
Chris@0:                         }
Chris@0:                     } catch (\ReflectionException $e) {
Chris@0:                         throw new RuntimeException(sprintf('Could not determine the class of the parameter "%s".', $key), 0, $e);
Chris@0:                     }
Chris@0: 
Chris@0:                     // Don't run set for a parameter passed to the constructor
Chris@0:                     $params[] = $parameterData;
Chris@0:                     unset($data[$key]);
Chris@0:                 } elseif ($constructorParameter->isDefaultValueAvailable()) {
Chris@0:                     $params[] = $constructorParameter->getDefaultValue();
Chris@0:                 } else {
Chris@0:                     throw new RuntimeException(
Chris@0:                         sprintf(
Chris@0:                             'Cannot create an instance of %s from serialized data because its constructor requires parameter "%s" to be present.',
Chris@0:                             $class,
Chris@0:                             $constructorParameter->name
Chris@0:                         )
Chris@0:                     );
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             if ($constructor->isConstructor()) {
Chris@0:                 return $reflectionClass->newInstanceArgs($params);
Chris@0:             } else {
Chris@0:                 return $constructor->invokeArgs(null, $params);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return new $class();
Chris@0:     }
Chris@0: }