/** * Called for each node of the graph that is being traversed. * * @param mixed $data the data depends on the direction, and type of visitor * @param null|array $type array has the format ["name" => string, "params" => array] * * @return mixed the return value depends on the direction, and type of visitor */ public function accept($data, array $type = null, Context $context) { $visitor = $context->getVisitor(); // If the type was not given, we infer the most specific type from the // input data in serialization mode. if (null === $type) { if ($context instanceof DeserializationContext) { throw new RuntimeException('The type must be given for all properties when deserializing.'); } $typeName = gettype($data); if ('object' === $typeName) { $typeName = get_class($data); } $type = array('name' => $typeName, 'params' => array()); } else { if ($context instanceof SerializationContext && null === $data) { $type = array('name' => 'NULL', 'params' => array()); } } switch ($type['name']) { case 'NULL': return $visitor->visitNull($data, $type, $context); case 'string': return $visitor->visitString($data, $type, $context); case 'int': case 'integer': return $visitor->visitInteger($data, $type, $context); case 'boolean': return $visitor->visitBoolean($data, $type, $context); case 'double': case 'float': return $visitor->visitDouble($data, $type, $context); case 'array': return $visitor->visitArray($data, $type, $context); case 'resource': $msg = 'Resources are not supported in serialized data.'; if ($context instanceof SerializationContext && null !== ($path = $context->getPath())) { $msg .= ' Path: ' . $path; } throw new RuntimeException($msg); default: // TODO: The rest of this method needs some refactoring. if ($context instanceof SerializationContext) { if (null !== $data) { if ($context->isVisiting($data)) { return null; } $context->startVisiting($data); } // If we're serializing a polymorphic type, then we'll be interested in the // metadata for the actual type of the object, not the base class. if (class_exists($type['name'], false) || interface_exists($type['name'], false)) { if (is_subclass_of($data, $type['name'], false)) { $type = array('name' => get_class($data), 'params' => array()); } } } elseif ($context instanceof DeserializationContext) { $context->increaseDepth(); } // Trigger pre-serialization callbacks, and listeners if they exist. // Dispatch pre-serialization event before handling data to have ability change type in listener if ($context instanceof SerializationContext) { if (null !== $this->dispatcher && $this->dispatcher->hasListeners('serializer.pre_serialize', $type['name'], $context->getFormat())) { $this->dispatcher->dispatch('serializer.pre_serialize', $type['name'], $context->getFormat(), $event = new PreSerializeEvent($context, $data, $type)); $type = $event->getType(); } } elseif ($context instanceof DeserializationContext) { if (null !== $this->dispatcher && $this->dispatcher->hasListeners('serializer.pre_deserialize', $type['name'], $context->getFormat())) { $this->dispatcher->dispatch('serializer.pre_deserialize', $type['name'], $context->getFormat(), $event = new PreDeserializeEvent($context, $data, $type)); $type = $event->getType(); $data = $event->getData(); } } // First, try whether a custom handler exists for the given type. This is done // before loading metadata because the type name might not be a class, but // could also simply be an artifical type. if (null !== ($handler = $this->handlerRegistry->getHandler($context->getDirection(), $type['name'], $context->getFormat()))) { $rs = call_user_func($handler, $visitor, $data, $type, $context); $this->leaveScope($context, $data); return $rs; } $exclusionStrategy = $context->getExclusionStrategy(); /** @var $metadata ClassMetadata */ $metadata = $this->metadataFactory->getMetadataForClass($type['name']); if ($context instanceof DeserializationContext && !empty($metadata->discriminatorMap) && $type['name'] === $metadata->discriminatorBaseClass) { $metadata = $this->resolveMetadata($data, $metadata); } if (null !== $exclusionStrategy && $exclusionStrategy->shouldSkipClass($metadata, $context)) { $this->leaveScope($context, $data); return null; } $context->pushClassMetadata($metadata); if ($context instanceof SerializationContext) { foreach ($metadata->preSerializeMethods as $method) { $method->invoke($data); } } $object = $data; if ($context instanceof DeserializationContext) { $object = $this->objectConstructor->construct($visitor, $metadata, $data, $type, $context); } if (isset($metadata->handlerCallbacks[$context->getDirection()][$context->getFormat()])) { $rs = $object->{$metadata->handlerCallbacks[$context->getDirection()][$context->getFormat()]}($visitor, $context instanceof SerializationContext ? null : $data, $context); $this->afterVisitingObject($metadata, $object, $type, $context); return $context instanceof SerializationContext ? $rs : $object; } $visitor->startVisitingObject($metadata, $object, $type, $context); foreach ($metadata->propertyMetadata as $propertyMetadata) { if (null !== $exclusionStrategy && $exclusionStrategy->shouldSkipProperty($propertyMetadata, $context)) { continue; } if ($context instanceof DeserializationContext && $propertyMetadata->readOnly) { continue; } $context->pushPropertyMetadata($propertyMetadata); $visitor->visitProperty($propertyMetadata, $data, $context); $context->popPropertyMetadata(); } if ($context instanceof SerializationContext) { $this->afterVisitingObject($metadata, $data, $type, $context); return $visitor->endVisitingObject($metadata, $data, $type, $context); } $rs = $visitor->endVisitingObject($metadata, $data, $type, $context); $this->afterVisitingObject($metadata, $rs, $type, $context); return $rs; } }