/**
* 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;
}
}