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<?php
declare(strict_types=1);
namespace Doctrine\ORM\Internal\Hydration;
use BackedEnum;
use Doctrine\DBAL\Driver\ResultStatement;
use Doctrine\DBAL\ForwardCompatibility\Result as ForwardCompatibilityResult;
use Doctrine\DBAL\Platforms\AbstractPlatform;
use Doctrine\DBAL\Result;
use Doctrine\DBAL\Types\Type;
use Doctrine\Deprecations\Deprecation;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\ORM\Events;
use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\Query\ResultSetMapping;
use Doctrine\ORM\Tools\Pagination\LimitSubqueryWalker;
use Doctrine\ORM\UnitOfWork;
use Generator;
use LogicException;
use ReflectionClass;
use TypeError;
use function array_map;
use function array_merge;
use function count;
use function end;
use function get_debug_type;
use function in_array;
use function is_array;
use function sprintf;
/**
* Base class for all hydrators. A hydrator is a class that provides some form
* of transformation of an SQL result set into another structure.
*/
abstract class AbstractHydrator
{
/**
* The ResultSetMapping.
*
* @var ResultSetMapping|null
*/
protected $_rsm;
/**
* The EntityManager instance.
*
* @var EntityManagerInterface
*/
protected $_em;
/**
* The dbms Platform instance.
*
* @var AbstractPlatform
*/
protected $_platform;
/**
* The UnitOfWork of the associated EntityManager.
*
* @var UnitOfWork
*/
protected $_uow;
/**
* Local ClassMetadata cache to avoid going to the EntityManager all the time.
*
* @var array<string, ClassMetadata<object>>
*/
protected $_metadataCache = [];
/**
* The cache used during row-by-row hydration.
*
* @var array<string, mixed[]|null>
*/
protected $_cache = [];
/**
* The statement that provides the data to hydrate.
*
* @var Result|null
*/
protected $_stmt;
/**
* The query hints.
*
* @var array<string, mixed>
*/
protected $_hints = [];
/**
* Initializes a new instance of a class derived from <tt>AbstractHydrator</tt>.
*
* @param EntityManagerInterface $em The EntityManager to use.
*/
public function __construct(EntityManagerInterface $em)
{
$this->_em = $em;
$this->_platform = $em->getConnection()->getDatabasePlatform();
$this->_uow = $em->getUnitOfWork();
}
/**
* Initiates a row-by-row hydration.
*
* @deprecated
*
* @param Result|ResultStatement $stmt
* @param ResultSetMapping $resultSetMapping
* @psalm-param array<string, mixed> $hints
*
* @return IterableResult
*/
public function iterate($stmt, $resultSetMapping, array $hints = [])
{
Deprecation::trigger(
'doctrine/orm',
'https://github.com/doctrine/orm/issues/8463',
'Method %s() is deprecated and will be removed in Doctrine ORM 3.0. Use toIterable() instead.',
__METHOD__
);
$this->_stmt = $stmt instanceof ResultStatement ? ForwardCompatibilityResult::ensure($stmt) : $stmt;
$this->_rsm = $resultSetMapping;
$this->_hints = $hints;
$evm = $this->_em->getEventManager();
$evm->addEventListener([Events::onClear], $this);
$this->prepare();
return new IterableResult($this);
}
/**
* Initiates a row-by-row hydration.
*
* @param Result|ResultStatement $stmt
* @psalm-param array<string, mixed> $hints
*
* @return Generator<array-key, mixed>
*
* @final
*/
public function toIterable($stmt, ResultSetMapping $resultSetMapping, array $hints = []): iterable
{
if (! $stmt instanceof Result) {
if (! $stmt instanceof ResultStatement) {
throw new TypeError(sprintf(
'%s: Expected parameter $stmt to be an instance of %s or %s, got %s',
__METHOD__,
Result::class,
ResultStatement::class,
get_debug_type($stmt)
));
}
Deprecation::trigger(
'doctrine/orm',
'https://github.com/doctrine/orm/pull/8796',
'%s: Passing a result as $stmt that does not implement %s is deprecated and will cause a TypeError on 3.0',
__METHOD__,
Result::class
);
$stmt = ForwardCompatibilityResult::ensure($stmt);
}
$this->_stmt = $stmt;
$this->_rsm = $resultSetMapping;
$this->_hints = $hints;
$evm = $this->_em->getEventManager();
$evm->addEventListener([Events::onClear], $this);
$this->prepare();
while (true) {
$row = $this->statement()->fetchAssociative();
if ($row === false) {
$this->cleanup();
break;
}
$result = [];
$this->hydrateRowData($row, $result);
$this->cleanupAfterRowIteration();
if (count($result) === 1) {
if (count($resultSetMapping->indexByMap) === 0) {
yield end($result);
} else {
yield from $result;
}
} else {
yield $result;
}
}
}
final protected function statement(): Result
{
if ($this->_stmt === null) {
throw new LogicException('Uninitialized _stmt property');
}
return $this->_stmt;
}
final protected function resultSetMapping(): ResultSetMapping
{
if ($this->_rsm === null) {
throw new LogicException('Uninitialized _rsm property');
}
return $this->_rsm;
}
/**
* Hydrates all rows returned by the passed statement instance at once.
*
* @param Result|ResultStatement $stmt
* @param ResultSetMapping $resultSetMapping
* @psalm-param array<string, string> $hints
*
* @return mixed[]
*/
public function hydrateAll($stmt, $resultSetMapping, array $hints = [])
{
if (! $stmt instanceof Result) {
if (! $stmt instanceof ResultStatement) {
throw new TypeError(sprintf(
'%s: Expected parameter $stmt to be an instance of %s or %s, got %s',
__METHOD__,
Result::class,
ResultStatement::class,
get_debug_type($stmt)
));
}
Deprecation::trigger(
'doctrine/orm',
'https://github.com/doctrine/orm/pull/8796',
'%s: Passing a result as $stmt that does not implement %s is deprecated and will cause a TypeError on 3.0',
__METHOD__,
Result::class
);
$stmt = ForwardCompatibilityResult::ensure($stmt);
}
$this->_stmt = $stmt;
$this->_rsm = $resultSetMapping;
$this->_hints = $hints;
$this->_em->getEventManager()->addEventListener([Events::onClear], $this);
$this->prepare();
try {
$result = $this->hydrateAllData();
} finally {
$this->cleanup();
}
return $result;
}
/**
* Hydrates a single row returned by the current statement instance during
* row-by-row hydration with {@link iterate()} or {@link toIterable()}.
*
* @deprecated
*
* @return mixed[]|false
*/
public function hydrateRow()
{
Deprecation::triggerIfCalledFromOutside(
'doctrine/orm',
'https://github.com/doctrine/orm/pull/9072',
'%s is deprecated.',
__METHOD__
);
$row = $this->statement()->fetchAssociative();
if ($row === false) {
$this->cleanup();
return false;
}
$result = [];
$this->hydrateRowData($row, $result);
return $result;
}
/**
* When executed in a hydrate() loop we have to clear internal state to
* decrease memory consumption.
*
* @param mixed $eventArgs
*
* @return void
*/
public function onClear($eventArgs)
{
}
/**
* Executes one-time preparation tasks, once each time hydration is started
* through {@link hydrateAll} or {@link iterate()}.
*
* @return void
*/
protected function prepare()
{
}
/**
* Executes one-time cleanup tasks at the end of a hydration that was initiated
* through {@link hydrateAll} or {@link iterate()}.
*
* @return void
*/
protected function cleanup()
{
$this->statement()->free();
$this->_stmt = null;
$this->_rsm = null;
$this->_cache = [];
$this->_metadataCache = [];
$this
->_em
->getEventManager()
->removeEventListener([Events::onClear], $this);
}
protected function cleanupAfterRowIteration(): void
{
}
/**
* Hydrates a single row from the current statement instance.
*
* Template method.
*
* @param mixed[] $row The row data.
* @param mixed[] $result The result to fill.
*
* @return void
*
* @throws HydrationException
*/
protected function hydrateRowData(array $row, array &$result)
{
throw new HydrationException('hydrateRowData() not implemented by this hydrator.');
}
/**
* Hydrates all rows from the current statement instance at once.
*
* @return mixed[]
*/
abstract protected function hydrateAllData();
/**
* Processes a row of the result set.
*
* Used for identity-based hydration (HYDRATE_OBJECT and HYDRATE_ARRAY).
* Puts the elements of a result row into a new array, grouped by the dql alias
* they belong to. The column names in the result set are mapped to their
* field names during this procedure as well as any necessary conversions on
* the values applied. Scalar values are kept in a specific key 'scalars'.
*
* @param mixed[] $data SQL Result Row.
* @psalm-param array<string, string> $id Dql-Alias => ID-Hash.
* @psalm-param array<string, bool> $nonemptyComponents Does this DQL-Alias has at least one non NULL value?
*
* @return array<string, array<string, mixed>> An array with all the fields
* (name => value) of the data
* row, grouped by their
* component alias.
* @psalm-return array{
* data: array<array-key, array>,
* newObjects?: array<array-key, array{
* class: mixed,
* args?: array
* }>,
* scalars?: array
* }
*/
protected function gatherRowData(array $data, array &$id, array &$nonemptyComponents)
{
$rowData = ['data' => []];
foreach ($data as $key => $value) {
$cacheKeyInfo = $this->hydrateColumnInfo($key);
if ($cacheKeyInfo === null) {
continue;
}
$fieldName = $cacheKeyInfo['fieldName'];
switch (true) {
case isset($cacheKeyInfo['isNewObjectParameter']):
$argIndex = $cacheKeyInfo['argIndex'];
$objIndex = $cacheKeyInfo['objIndex'];
$type = $cacheKeyInfo['type'];
$value = $type->convertToPHPValue($value, $this->_platform);
$rowData['newObjects'][$objIndex]['class'] = $cacheKeyInfo['class'];
$rowData['newObjects'][$objIndex]['args'][$argIndex] = $value;
break;
case isset($cacheKeyInfo['isScalar']):
$type = $cacheKeyInfo['type'];
$value = $type->convertToPHPValue($value, $this->_platform);
// Reimplement ReflectionEnumProperty code
if ($value !== null && isset($cacheKeyInfo['enumType'])) {
$enumType = $cacheKeyInfo['enumType'];
if (is_array($value)) {
$value = array_map(static function ($value) use ($enumType): BackedEnum {
return $enumType::from($value);
}, $value);
} else {
$value = $enumType::from($value);
}
}
$rowData['scalars'][$fieldName] = $value;
break;
//case (isset($cacheKeyInfo['isMetaColumn'])):
default:
$dqlAlias = $cacheKeyInfo['dqlAlias'];
$type = $cacheKeyInfo['type'];
// If there are field name collisions in the child class, then we need
// to only hydrate if we are looking at the correct discriminator value
if (
isset($cacheKeyInfo['discriminatorColumn'], $data[$cacheKeyInfo['discriminatorColumn']])
&& ! in_array((string) $data[$cacheKeyInfo['discriminatorColumn']], $cacheKeyInfo['discriminatorValues'], true)
) {
break;
}
// in an inheritance hierarchy the same field could be defined several times.
// We overwrite this value so long we don't have a non-null value, that value we keep.
// Per definition it cannot be that a field is defined several times and has several values.
if (isset($rowData['data'][$dqlAlias][$fieldName])) {
break;
}
$rowData['data'][$dqlAlias][$fieldName] = $type
? $type->convertToPHPValue($value, $this->_platform)
: $value;
if ($cacheKeyInfo['isIdentifier'] && $value !== null) {
$id[$dqlAlias] .= '|' . $value;
$nonemptyComponents[$dqlAlias] = true;
}
break;
}
}
return $rowData;
}
/**
* Processes a row of the result set.
*
* Used for HYDRATE_SCALAR. This is a variant of _gatherRowData() that
* simply converts column names to field names and properly converts the
* values according to their types. The resulting row has the same number
* of elements as before.
*
* @param mixed[] $data
* @psalm-param array<string, mixed> $data
*
* @return mixed[] The processed row.
* @psalm-return array<string, mixed>
*/
protected function gatherScalarRowData(&$data)
{
$rowData = [];
foreach ($data as $key => $value) {
$cacheKeyInfo = $this->hydrateColumnInfo($key);
if ($cacheKeyInfo === null) {
continue;
}
$fieldName = $cacheKeyInfo['fieldName'];
// WARNING: BC break! We know this is the desired behavior to type convert values, but this
// erroneous behavior exists since 2.0 and we're forced to keep compatibility.
if (! isset($cacheKeyInfo['isScalar'])) {
$type = $cacheKeyInfo['type'];
$value = $type ? $type->convertToPHPValue($value, $this->_platform) : $value;
$fieldName = $cacheKeyInfo['dqlAlias'] . '_' . $fieldName;
}
$rowData[$fieldName] = $value;
}
return $rowData;
}
/**
* Retrieve column information from ResultSetMapping.
*
* @param string $key Column name
*
* @return mixed[]|null
* @psalm-return array<string, mixed>|null
*/
protected function hydrateColumnInfo($key)
{
if (isset($this->_cache[$key])) {
return $this->_cache[$key];
}
switch (true) {
// NOTE: Most of the times it's a field mapping, so keep it first!!!
case isset($this->_rsm->fieldMappings[$key]):
$classMetadata = $this->getClassMetadata($this->_rsm->declaringClasses[$key]);
$fieldName = $this->_rsm->fieldMappings[$key];
$fieldMapping = $classMetadata->fieldMappings[$fieldName];
$ownerMap = $this->_rsm->columnOwnerMap[$key];
$columnInfo = [
'isIdentifier' => in_array($fieldName, $classMetadata->identifier, true),
'fieldName' => $fieldName,
'type' => Type::getType($fieldMapping['type']),
'dqlAlias' => $ownerMap,
];
// the current discriminator value must be saved in order to disambiguate fields hydration,
// should there be field name collisions
if ($classMetadata->parentClasses && isset($this->_rsm->discriminatorColumns[$ownerMap])) {
return $this->_cache[$key] = array_merge(
$columnInfo,
[
'discriminatorColumn' => $this->_rsm->discriminatorColumns[$ownerMap],
'discriminatorValue' => $classMetadata->discriminatorValue,
'discriminatorValues' => $this->getDiscriminatorValues($classMetadata),
]
);
}
return $this->_cache[$key] = $columnInfo;
case isset($this->_rsm->newObjectMappings[$key]):
// WARNING: A NEW object is also a scalar, so it must be declared before!
$mapping = $this->_rsm->newObjectMappings[$key];
return $this->_cache[$key] = [
'isScalar' => true,
'isNewObjectParameter' => true,
'fieldName' => $this->_rsm->scalarMappings[$key],
'type' => Type::getType($this->_rsm->typeMappings[$key]),
'argIndex' => $mapping['argIndex'],
'objIndex' => $mapping['objIndex'],
'class' => new ReflectionClass($mapping['className']),
];
case isset($this->_rsm->scalarMappings[$key], $this->_hints[LimitSubqueryWalker::FORCE_DBAL_TYPE_CONVERSION]):
return $this->_cache[$key] = [
'fieldName' => $this->_rsm->scalarMappings[$key],
'type' => Type::getType($this->_rsm->typeMappings[$key]),
'dqlAlias' => '',
'enumType' => $this->_rsm->enumMappings[$key] ?? null,
];
case isset($this->_rsm->scalarMappings[$key]):
return $this->_cache[$key] = [
'isScalar' => true,
'fieldName' => $this->_rsm->scalarMappings[$key],
'type' => Type::getType($this->_rsm->typeMappings[$key]),
'enumType' => $this->_rsm->enumMappings[$key] ?? null,
];
case isset($this->_rsm->metaMappings[$key]):
// Meta column (has meaning in relational schema only, i.e. foreign keys or discriminator columns).
$fieldName = $this->_rsm->metaMappings[$key];
$dqlAlias = $this->_rsm->columnOwnerMap[$key];
$type = isset($this->_rsm->typeMappings[$key])
? Type::getType($this->_rsm->typeMappings[$key])
: null;
// Cache metadata fetch
$this->getClassMetadata($this->_rsm->aliasMap[$dqlAlias]);
return $this->_cache[$key] = [
'isIdentifier' => isset($this->_rsm->isIdentifierColumn[$dqlAlias][$key]),
'isMetaColumn' => true,
'fieldName' => $fieldName,
'type' => $type,
'dqlAlias' => $dqlAlias,
];
}
// this column is a left over, maybe from a LIMIT query hack for example in Oracle or DB2
// maybe from an additional column that has not been defined in a NativeQuery ResultSetMapping.
return null;
}
/**
* @return string[]
* @psalm-return non-empty-list<string>
*/
private function getDiscriminatorValues(ClassMetadata $classMetadata): array
{
$values = array_map(
function (string $subClass): string {
return (string) $this->getClassMetadata($subClass)->discriminatorValue;
},
$classMetadata->subClasses
);
$values[] = (string) $classMetadata->discriminatorValue;
return $values;
}
/**
* Retrieve ClassMetadata associated to entity class name.
*
* @param string $className
*
* @return ClassMetadata
*/
protected function getClassMetadata($className)
{
if (! isset($this->_metadataCache[$className])) {
$this->_metadataCache[$className] = $this->_em->getClassMetadata($className);
}
return $this->_metadataCache[$className];
}
/**
* Register entity as managed in UnitOfWork.
*
* @param object $entity
* @param mixed[] $data
*
* @return void
*
* @todo The "$id" generation is the same of UnitOfWork#createEntity. Remove this duplication somehow
*/
protected function registerManaged(ClassMetadata $class, $entity, array $data)
{
if ($class->isIdentifierComposite) {
$id = [];
foreach ($class->identifier as $fieldName) {
$id[$fieldName] = isset($class->associationMappings[$fieldName])
? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
: $data[$fieldName];
}
} else {
$fieldName = $class->identifier[0];
$id = [
$fieldName => isset($class->associationMappings[$fieldName])
? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
: $data[$fieldName],
];
}
$this->_em->getUnitOfWork()->registerManaged($entity, $id, $data);
}
}