/**
* Finds a document by its identifier
*
* @param string|object $id The identifier
* @param int $lockMode
* @param int $lockVersion
* @throws Mapping\MappingException
* @throws LockException
* @return object The document.
*/
public function find($id, $lockMode = LockMode::NONE, $lockVersion = null)
{
if ($id === null) {
return;
}
/* TODO: What if the ID object has a field with the same name as the
* class' mapped identifier field name?
*/
if (is_array($id)) {
list($identifierFieldName) = $this->class->getIdentifierFieldNames();
if (isset($id[$identifierFieldName])) {
$id = $id[$identifierFieldName];
}
}
// Check identity map first
if ($document = $this->uow->tryGetById($id, $this->class)) {
if ($lockMode != LockMode::NONE) {
$this->dm->lock($document, $lockMode, $lockVersion);
}
return $document;
// Hit!
}
$criteria = array('_id' => $id);
if ($lockMode == LockMode::NONE) {
return $this->getDocumentPersister()->load($criteria);
}
if ($lockMode == LockMode::OPTIMISTIC) {
if (!$this->class->isVersioned) {
throw LockException::notVersioned($this->documentName);
}
if ($document = $this->getDocumentPersister()->load($criteria)) {
$this->uow->lock($document, $lockMode, $lockVersion);
}
return $document;
}
return $this->getDocumentPersister()->load($criteria, null, array(), $lockMode);
}
