TODO: This method assumes that $id is a valid PHP identifier for the
document class. If the class expects its database identifier to be a
MongoId, and an incompatible $id is registered (e.g. an integer), the
document identifiers map will become inconsistent with the identity map.
In the future, we may want to round-trip $id through a PHP and database
conversion and throw an exception if it's inconsistent.
/**
* Lood document by its identifier.
*
* @param string $id
* @return object|null
*/
public function loadById($id)
{
$result = $this->_collection->findOne(array('_id' => $this->_class->getDatabaseIdentifierValue($id)));
if ($result !== null) {
$document = $this->_uow->getOrCreateDocument($this->_documentName, $result);
$this->_uow->registerManaged($document, $this->_class->getPHPIdentifierValue($result['_id']), $result);
return $document;
}
return null;
}
/**
* Gets a partial reference to the document identified by the given type and identifier
* without actually loading it, if the document is not yet loaded.
*
* The returned reference may be a partial object if the document is not yet loaded/managed.
* If it is a partial object it will not initialize the rest of the document state on access.
* Thus you can only ever safely access the identifier of an document obtained through
* this method.
*
* The use-cases for partial references involve maintaining bidirectional associations
* without loading one side of the association or to update an document without loading it.
* Note, however, that in the latter case the original (persistent) document data will
* never be visible to the application (especially not event listeners) as it will
* never be loaded in the first place.
*
* @param string $documentName The name of the document type.
* @param mixed $identifier The document identifier.
* @return object The (partial) document reference.
*/
public function getPartialReference($documentName, $identifier)
{
$class = $this->metadataFactory->getMetadataFor($documentName);
// Check identity map first, if its already in there just return it.
if ($document = $this->unitOfWork->tryGetById($identifier, $class->rootDocumentName)) {
return $document;
}
$document = $class->newInstance();
$class->setIdentifierValue($document, $identifier);
$this->unitOfWork->registerManaged($document, $identifier, array());
return $document;
}
/**
* Creates or fills a single document object from an query result.
*
* @param $result The query result.
* @param object $document The document object to fill, if any.
* @param array $hints Hints for document creation.
* @return object The filled and managed document object or NULL, if the query result is empty.
*/
private function createDocument($result, $document = null, array $hints = array())
{
if ($result === null) {
return null;
}
if ($document !== null) {
$hints[Builder::HINT_REFRESH] = true;
$id = $result['_id'];
$this->uow->registerManaged($document, $id, $result);
}
return $this->uow->getOrCreateDocument($this->class->name, $result, $hints);
}
private function loadEmbedManyCollection(PersistentCollection $collection)
{
$embeddedDocuments = $collection->getMongoData();
$mapping = $collection->getMapping();
$owner = $collection->getOwner();
if ($embeddedDocuments) {
foreach ($embeddedDocuments as $key => $embeddedDocument) {
$className = $this->dm->getClassNameFromDiscriminatorValue($mapping, $embeddedDocument);
$embeddedMetadata = $this->dm->getClassMetadata($className);
$embeddedDocumentObject = $embeddedMetadata->newInstance();
$data = $this->hydratorFactory->hydrate($embeddedDocumentObject, $embeddedDocument);
$this->uow->registerManaged($embeddedDocumentObject, null, $data);
$this->uow->setParentAssociation($embeddedDocumentObject, $mapping, $owner, $mapping['name'] . '.' . $key);
$collection->add($embeddedDocumentObject);
}
}
}
private function loadEmbedManyCollection(PersistentCollection $collection)
{
$embeddedDocuments = $collection->getMongoData();
$mapping = $collection->getMapping();
$owner = $collection->getOwner();
if ($embeddedDocuments) {
foreach ($embeddedDocuments as $key => $embeddedDocument) {
$className = $this->uow->getClassNameForAssociation($mapping, $embeddedDocument);
$embeddedMetadata = $this->dm->getClassMetadata($className);
$embeddedDocumentObject = $embeddedMetadata->newInstance();
$this->uow->setParentAssociation($embeddedDocumentObject, $mapping, $owner, $mapping['name'] . '.' . $key);
$data = $this->hydratorFactory->hydrate($embeddedDocumentObject, $embeddedDocument);
$id = $embeddedMetadata->identifier && isset($data[$embeddedMetadata->identifier]) ? $data[$embeddedMetadata->identifier] : null;
$this->uow->registerManaged($embeddedDocumentObject, $id, $data);
if (CollectionHelper::isHash($mapping['strategy'])) {
$collection->set($key, $embeddedDocumentObject);
} else {
$collection->add($embeddedDocumentObject);
}
}
}
}