/**
* @param string $direction
* @param object $object
* @param integer $pageLimit
* @return array
*/
protected function makePagingLink($direction, $object, $pageLimit)
{
$return = array('offset-dir' => $direction, 'limit' => $pageLimit, $this->offsetKey => $this->storage->serializeOffset($object, $this->sort));
if (isset($this->options['sortby'])) {
$return['sortby'] = $this->options['sortby'];
}
return $return;
}
public function merge(array $query, array $result)
{
$query = ObjectManager::splitFromRow($query, $this->queryKeys);
if ($query === null) {
// the queryKeys are either unset or null, and not indexable
// TODO: what should happen here?
return;
}
$this->result[$query] = $result;
}
public function canAnswer(array $keys, array $options)
{
if (!parent::canAnswer($keys, $options)) {
return false;
}
if (isset($options['sort'], $options['order'])) {
return ObjectManager::makeArray($options['sort']) === $this->options['sort'] && strtoupper($options['order']) === $this->options['order'];
}
return true;
}
public function fromStorageRow(array $row, $object = null)
{
$pk = ObjectManager::splitFromRow($row, $this->primaryKey);
if ($pk === null) {
throw new \InvalidArgumentException('Storage row has no pk');
} elseif (!isset($this->loaded[$pk])) {
// unserialize the object
return $this->loaded[$pk] = call_user_func($this->fromStorageRow, $row, $object);
} elseif ($object === null) {
// provide previously loaded object
return $this->loaded[$pk];
} elseif ($object !== $this->loaded[$pk]) {
// loaded object of this id is not same object
$class = get_class($object);
$id = json_encode($pk);
throw new \InvalidArgumentException("Duplicate '{$class}' objects for id {$id}");
} else {
// object was provided, load $row into $object
// we already know $this->loaded[$pk] === $object
return call_user_func($this->fromStorageRow, $row, $object);
}
}
/**
* Calculates the DB updates to be performed to update data from $old to
* $new.
*
* @param array $old
* @param array $new
* @return array
* @throws DataModelException
*/
public function calcUpdates(array $old, array $new)
{
$changeSet = ObjectManager::calcUpdatesWithoutValidation($old, $new);
foreach ($this->obsoleteUpdateColumns as $val) {
// Need to use array_key_exists to check null value
if (array_key_exists($val, $changeSet)) {
unset($changeSet[$val]);
}
}
if (is_array($this->allowedUpdateColumns)) {
$extra = array_diff(array_keys($changeSet), $this->allowedUpdateColumns);
if ($extra) {
throw new DataModelException('Update not allowed on: ' . implode(', ', $extra), 'process-data');
}
}
return $changeSet;
}
/**
* {@inheritDoc}
*/
public function onAfterRemove($object, array $old, array $metadata)
{
$indexed = ObjectManager::splitFromRow($old, $this->indexed);
if (!$indexed) {
throw new DataModelException('Unindexable row: ' . FormatJson::encode($old), 'process-data');
}
$this->removeFromIndex($indexed, $old);
}
/**
* Fetch a node and all its descendants. Children are returned in the
* same order they were inserted.
*
* @param UUID|UUID[] $roots
* @return array Multi-dimensional tree. The top level is a map from the uuid of a node
* to attributes about that node. The top level contains not just the parents, but all nodes
* within this tree. Within each node there is a 'children' key that contains a map from
* the child uuid's to references back to the top level of this identity map. As such this
* result can be read either as a list or a tree.
* @throws DataModelException When invalid data is received from self::fetchSubtreeNodeList
*/
public function fetchSubtreeIdentityMap($roots)
{
$roots = ObjectManager::makeArray($roots);
if (!$roots) {
return array();
}
$nodes = $this->fetchSubtreeNodeList($roots);
if (!$nodes) {
throw new DataModelException('subtree node list should have at least returned root: ' . $root, 'process-data');
} elseif (count($nodes) === 1) {
$parentMap = $this->fetchParentMap(reset($nodes));
} else {
$parentMap = $this->fetchParentMap(call_user_func_array('array_merge', $nodes));
}
$identityMap = array();
foreach ($parentMap as $child => $parent) {
if (!array_key_exists($child, $identityMap)) {
$identityMap[$child] = array('children' => array());
}
// Root nodes have no parent
if ($parent !== null) {
$identityMap[$parent->getAlphadecimal()]['children'][$child] =& $identityMap[$child];
}
}
foreach (array_keys($identityMap) as $parent) {
ksort($identityMap[$parent]['children']);
}
return $identityMap;
}
/**
* Takes an array of rows going to/from the database/cache. Converts uuid and
* things that look like uuids into the requested format.
*
* @param array $array
* @param string $format
* @return string[]|UUIDBlob[] Typically an array of strings. If required by the database when
* $format === 'binary' uuid values will be represented as Blob objects.
*/
public static function convertUUIDs($array, $format = 'binary')
{
$array = ObjectManager::makeArray($array);
foreach ($array as $key => $value) {
if ($value instanceof UUIDBlob) {
// database encoded binary value
if ($format === 'alphadecimal') {
$array[$key] = UUID::create($value->fetch())->getAlphadecimal();
}
} elseif ($value instanceof UUID) {
if ($format === 'binary') {
$array[$key] = $value->getBinary();
} elseif ($format === 'alphadecimal') {
$array[$key] = $value->getAlphadecimal();
}
} elseif (is_string($value) && substr($key, -3) === '_id') {
// things that look like uuids
$len = strlen($value);
if ($format === 'alphadecimal' && $len === self::BIN_LEN) {
$array[$key] = UUID::create($value)->getAlphadecimal();
} elseif ($format === 'binary' && ($len >= self::MIN_ALNUM_LEN && $len <= self::ALNUM_LEN || $len === self::HEX_LEN)) {
// Note that if a value is a binary string, but needs to be encoded
// for the database, that is unhandled here. A patch is under
// consideration to allow binary data to always be wrapped in a Blob
// to clear up this inconsistency.
$array[$key] = UUID::create($value)->getBinary();
}
}
}
return $array;
}
public function findMulti(array $queries, array $options = array())
{
$keys = array_keys(reset($queries));
$pks = $this->getPrimaryKeyColumns();
if (count($keys) !== count($pks) || array_diff($keys, $pks)) {
return $this->fallbackFindMulti($queries, $options);
}
$conds = array();
$dbr = $this->dbFactory->getDB(DB_SLAVE);
foreach ($queries as $query) {
$conds[] = $dbr->makeList($this->preprocessSqlArray($query), LIST_AND);
}
unset($query);
$conds = $dbr->makeList($conds, LIST_OR);
$result = array();
// options can be ignored for primary key search
$res = $this->find(array(new RawSql($conds)));
if (!$res) {
return $result;
}
// create temp array with pk value (usually uuid) as key and full db row
// as value
$temp = new MultiDimArray();
foreach ($res as $val) {
$val = UUID::convertUUIDs($val, 'alphadecimal');
$temp[ObjectManager::splitFromRow($val, $this->primaryKey)] = $val;
}
// build return value by mapping the database rows to the matching array
// index in $queries
foreach ($queries as $i => $val) {
$val = UUID::convertUUIDs($val, 'alphadecimal');
$pk = ObjectManager::splitFromRow($val, $this->primaryKey);
$result[$i][] = isset($temp[$pk]) ? $temp[$pk] : null;
}
return $result;
}
/**
* Gets the required updates. Any changes to External Store will be reflected in
* the returned array.
*
* @param array $old Associative array mapping prior columns to old values
* @param array $new Associative array mapping updated columns to new values
*
* @return array Validated change set as associative array, mapping columns to
* change to their new values
*/
public function calcUpdates(array $old, array $new)
{
// First, see if there are any changes to content at all.
// If not, processExternalStore will know not to insert a useless row for
// unchanged content (if updating content is allowed).
$unvalidatedChangeset = ObjectManager::calcUpdatesWithoutValidation($old, $new);
// We check here so if it's not allowed, we don't insert a wasted External
// Store entry, then throw an exception in the parent calcUpdates.
if ($this->isUpdatingExistingRevisionContentAllowed()) {
$unvalidatedChangeset = $this->processExternalStore($unvalidatedChangeset);
}
// The parent calcUpdates does the validation that we're not changing a non-allowed
// field, regardless of whether explicitly passed in, or done by processExternalStore.
$validatedChangeset = parent::calcUpdates(array(), $unvalidatedChangeset);
return $validatedChangeset;
}
/**
* Returns a boolean true/false if the getMulti()-operation for the given
* attributes has already been resolves and doesn't need to query any
* outside cache/database.
* Determining if a find() has not yet been resolved may be useful so that
* additional data may be loaded at once.
*
* @param array $objectIds Ids to getMulti()
* @return bool
*/
public function gotMulti(array $objectIds)
{
if (!$objectIds) {
return true;
}
$primaryKey = $this->storage->getPrimaryKeyColumns();
$queries = array();
foreach ($objectIds as $id) {
$query = array_combine($primaryKey, ObjectManager::makeArray($id));
$query = UUID::convertUUIDs($query, 'alphadecimal');
if (!$this->mapper->get($query)) {
$queries[] = $query;
}
}
if ($queries && $this->mapper instanceof Mapper\CachingObjectMapper) {
return false;
}
return $this->foundMulti($queries);
}
