/**
* Executes a merge operation on an document.
*
* @param object $document
* @param array $visited
* @return object The managed copy of the document.
* @throws InvalidArgumentException If the document instance is NEW.
*/
private function doMerge($document, array &$visited, $prevManagedCopy = null, $assoc = null)
{
$oid = spl_object_hash($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 documents are ignored by the merge operation.
if ($this->getDocumentState($document, self::STATE_DETACHED) == self::STATE_MANAGED) {
$managedCopy = $document;
} else {
$id = null;
if (!$class->isEmbeddedDocument) {
// Try to look the entity up in the identity map.
$id = $class->getIdentifierValue($document);
}
// If there is no ID, it is actually NEW.
if (!$id) {
$managedCopy = $class->newInstance();
$this->persistNew($class, $managedCopy);
} else {
$managedCopy = $this->tryGetById($id, $class->rootDocumentName);
if ($managedCopy) {
// We have the entity in-memory already, just make sure its not removed.
if ($this->getDocumentState($managedCopy) == self::STATE_REMOVED) {
throw new InvalidArgumentException('Removed entity detected during merge.' . ' Can not merge with a removed entity.');
}
} 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 entity was not found.
$managedCopy = $class->newInstance();
$class->setIdentifierValue($managedCopy, $id);
$this->persistNew($class, $managedCopy);
}
}
if ($class->isVersioned) {
$managedCopyVersion = $class->reflFields[$class->versionField]->getValue($managedCopy);
$documentVersion = $class->reflFields[$class->versionField]->getValue($document);
// Throw exception if versions don't match.
if ($managedCopyVersion != $documentVersion) {
throw LockException::lockFailedVersionMissmatch($documentVersion, $managedCopyVersion);
}
}
// Merge state of $document into existing (managed) entity
foreach ($class->reflFields as $name => $prop) {
if (!isset($class->fieldMappings[$name]['embedded']) && !isset($class->fieldMappings[$name]['reference'])) {
$prop->setValue($managedCopy, $prop->getValue($document));
} else {
$assoc2 = $class->fieldMappings[$name];
if ($assoc2['type'] === '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 (!isset($assoc2['embedded']) && !$assoc2['isCascadeMerge']) {
if ($this->getDocumentState($other, self::STATE_DETACHED) == self::STATE_MANAGED) {
$prop->setValue($managedCopy, $other);
} else {
$targetDocument = isset($assoc2['targetDocument']) ? $assoc2['targetDocument'] : get_class($other);
$targetClass = $this->dm->getClassMetadata($targetDocument);
$id = $targetClass->getIdentifierValue($other);
$proxy = $this->dm->getProxyFactory()->getProxy($targetDocument, $id);
$prop->setValue($managedCopy, $proxy);
$this->registerManaged($proxy, $id, array());
}
}
}
}
} 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;
}
foreach ($mergeCol as $entry) {
$targetDocument = isset($assoc2['targetDocument']) ? $assoc2['targetDocument'] : get_class($entry);
$targetClass = $this->dm->getClassMetadata($targetDocument);
if ($targetClass->isEmbeddedDocument) {
$this->registerManaged($entry, null, array());
} else {
$id = $targetClass->getIdentifierValue($entry);
$this->registerManaged($entry, $id, array());
}
}
if (!$mergeCol instanceof PersistentCollection) {
if (!$mergeCol instanceof Collection) {
$mergeCol = new ArrayCollection($mergeCol);
}
$mergeCol = new PersistentCollection($mergeCol, $this->dm, $this, $this->cmd);
$mergeCol->setInitialized(true);
} else {
$mergeCol->setDocumentManager($this->dm);
}
$mergeCol->setOwner($managedCopy, $assoc2);
$mergeCol->setDirty(true);
// mark for dirty checking
$prop->setValue($managedCopy, $mergeCol);
}
}
if ($class->isChangeTrackingNotify()) {
// Just treat all properties as changed, there is no other choice.
$this->propertyChanged($managedCopy, $name, null, $prop->getValue($managedCopy));
}
}
if ($class->isChangeTrackingDeferredExplicit()) {
$this->scheduleForDirtyCheck($document);
}
}
if ($prevManagedCopy !== null) {
$assocField = $assoc->sourceFieldName;
$prevClass = $this->dm->getClassMetadata(get_class($prevManagedCopy));
if ($assoc->isOneToOne()) {
$prevClass->reflFields[$assocField]->setValue($prevManagedCopy, $managedCopy);
} else {
$prevClass->reflFields[$assocField]->getValue($prevManagedCopy)->unwrap()->add($managedCopy);
if ($assoc->isOneToMany()) {
$class->reflFields[$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;
}
/**
* {@inheritdoc}
*/
public function setDocumentManager(DocumentManager $dm)
{
$this->collection->setDocumentManager($dm);
}
