/** * Gets a reference to the document identified by the given type and identifier * without actually loading it. * * If partial objects are allowed, this method will return a partial object that only * has its identifier populated. Otherwise a proxy is returned that automatically * loads itself on first access. * * @return object The document reference. */ public function getReference($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 = $this->_proxyFactory->getProxy($class->name, $identifier); $this->_unitOfWork->registerManaged($document, $identifier, array()); return $document; }
/** * 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; }