private function doMerge($document, array &$visited, $prevManagedCopy = null, $assoc = null)
{
if (!is_object($document)) {
throw CouchDBException::unexpectedDocumentType($document);
}
$oid = spl_object_hash($document);
if (isset($visited[$oid])) {
return;
// Prevent infinite recursion
}
$visited[$oid] = $document;
// mark visited
$class = $this->dm->getClassMetadata(get_class($document));
// First we assume DETACHED, although it can still be NEW but we can avoid
// an extra db-roundtrip this way. If it is not MANAGED but has an identity,
// we need to fetch it from the db anyway in order to merge.
// MANAGED entities are ignored by the merge operation.
if ($this->getDocumentState($document) == self::STATE_MANAGED) {
$managedCopy = $document;
} else {
$id = $class->getIdentifierValue($document);
if (!$id) {
// document is new
// TODO: prePersist will be fired on the empty object?!
$managedCopy = $class->newInstance();
$this->persistNew($class, $managedCopy);
} else {
$managedCopy = $this->tryGetById($id);
if ($managedCopy) {
// We have the document in-memory already, just make sure its not removed.
if ($this->getDocumentState($managedCopy) == self::STATE_REMOVED) {
throw new \InvalidArgumentException('Removed document detected during merge.' . ' Can not merge with a removed document.');
}
} else {
// We need to fetch the managed copy in order to merge.
$managedCopy = $this->dm->find($class->name, $id);
}
if ($managedCopy === null) {
// If the identifier is ASSIGNED, it is NEW, otherwise an error
// since the managed document was not found.
if ($class->idGenerator == ClassMetadata::IDGENERATOR_ASSIGNED) {
$managedCopy = $class->newInstance();
$class->setIdentifierValue($managedCopy, $id);
$this->persistNew($class, $managedCopy);
} else {
throw new DocumentNotFoundException();
}
}
}
if ($class->isVersioned) {
$managedCopyVersion = $class->reflFields[$class->versionField]->getValue($managedCopy);
$documentVersion = $class->reflFields[$class->versionField]->getValue($document);
// Throw exception if versions dont match.
if ($managedCopyVersion != $documentVersion) {
throw OptimisticLockException::lockFailedVersionMissmatch($document, $documentVersion, $managedCopyVersion);
}
}
$managedOid = spl_object_hash($managedCopy);
// Merge state of $entity into existing (managed) entity
foreach ($class->reflFields as $name => $prop) {
if (!isset($class->associationsMappings[$name])) {
if (!$class->isIdentifier($name)) {
$prop->setValue($managedCopy, $prop->getValue($document));
}
} else {
$assoc2 = $class->associationsMappings[$name];
if ($assoc2['type'] & ClassMetadata::TO_ONE) {
$other = $prop->getValue($document);
if ($other === null) {
$prop->setValue($managedCopy, null);
} else {
if ($other instanceof Proxy && !$other->__isInitialized__) {
// do not merge fields marked lazy that have not been fetched.
continue;
} else {
if ($assoc2['cascade'] & ClassMetadata::CASCADE_MERGE == 0) {
if ($this->getDocumentState($other) == self::STATE_MANAGED) {
$prop->setValue($managedCopy, $other);
} else {
$targetClass = $this->dm->getClassMetadata($assoc2['targetDocument']);
$id = $targetClass->getIdentifierValues($other);
$proxy = $this->dm->getProxyFactory()->getProxy($assoc2['targetDocument'], $id);
$prop->setValue($managedCopy, $proxy);
$this->registerManaged($proxy, $id, null);
}
}
}
}
} else {
$mergeCol = $prop->getValue($document);
if ($mergeCol instanceof PersistentCollection && !$mergeCol->isInitialized) {
// do not merge fields marked lazy that have not been fetched.
// keep the lazy persistent collection of the managed copy.
continue;
}
$managedCol = $prop->getValue($managedCopy);
if (!$managedCol) {
if ($assoc2['isOwning']) {
$managedCol = new PersistentIdsCollection(new ArrayCollection(), $assoc2['targetDocument'], $this->dm, array());
} else {
$managedCol = new PersistentViewCollection(new ArrayCollection(), $this->dm, $this->documentIdentifiers[$managedOid], $assoc2);
}
$prop->setValue($managedCopy, $managedCol);
$this->originalData[$managedOid][$name] = $managedCol;
}
if ($assoc2['cascade'] & ClassMetadata::CASCADE_MERGE > 0) {
$managedCol->initialize();
if (!$managedCol->isEmpty()) {
// clear managed collection, in casacadeMerge() the collection is filled again.
$managedCol->unwrap()->clear();
}
}
}
}
}
}
if ($prevManagedCopy !== null) {
$assocField = $assoc['fieldName'];
$prevClass = $this->dm->getClassMetadata(get_class($prevManagedCopy));
if ($assoc['type'] & ClassMetadata::TO_ONE) {
$prevClass->reflFields[$assocField]->setValue($prevManagedCopy, $managedCopy);
} else {
$prevClass->reflFields[$assocField]->getValue($prevManagedCopy)->add($managedCopy);
if ($assoc['type'] == ClassMetadata::ONE_TO_MANY) {
$class->reflFields[$assoc['mappedBy']]->setValue($managedCopy, $prevManagedCopy);
}
}
}
// Mark the managed copy visited as well
$visited[spl_object_hash($managedCopy)] = true;
$this->cascadeMerge($document, $managedCopy, $visited);
return $managedCopy;
}
