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<?php |
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namespace RulerZ\Target\DoctrineORM; |
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use Doctrine\ORM\EntityManagerInterface as EntityManager; |
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use Hoa\Ruler\Model as AST; |
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class DoctrineAutoJoin |
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{ |
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/** |
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* @var EntityManager |
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*/ |
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private $em; |
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/** |
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* @var array |
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*/ |
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private $detectedJoins = []; |
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/** |
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* @var array<Entity,array<dimmension,alias> |
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*/ |
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private $knownEntities = []; |
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/** |
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* @var array<alias,Entity> |
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*/ |
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private $aliasMap = []; |
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/** |
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* @var array |
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*/ |
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private $rootEntities = []; |
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public function __construct(EntityManager $em, array $rootEntities, array $rootAliases, array $existingJoins) |
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{ |
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$this->em = $em; |
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$this->rootEntities = array_combine($rootAliases, $rootEntities); |
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$this->aliasMap = array_combine($rootAliases, $rootEntities); |
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foreach ($existingJoins as $joins) { |
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/** @var \Doctrine\ORM\Query\Expr\Join $join */ |
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foreach ($joins as $join) { |
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list($fromAlias, $attribute) = explode('.', $join->getJoin()); |
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$relation = $this->getRelation($attribute, $this->getEntity($fromAlias)); |
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$this->saveAlias($relation['targetEntity'], $relation['fieldName'], $join->getAlias()); |
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} |
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} |
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} |
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public function getDetectedJoins() |
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{ |
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return $this->detectedJoins; |
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} |
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/** |
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* @param string $root |
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* @param string $column |
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* @param string $alias |
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*/ |
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private function addDetectedJoin($root, $column, $alias) |
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{ |
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foreach ($this->detectedJoins as &$join) { |
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if ($join['root'] === (string) $root && $join['column'] === (string) $column && |
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$join['as'] === (string) $alias |
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) { |
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return; |
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} |
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} |
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$this->detectedJoins[] = [ |
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'root' => (string) $root, |
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'column' => (string) $column, |
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'as' => (string) $alias, |
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]; |
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} |
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public function buildAccessPath(AST\Bag\Context $element) |
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{ |
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$dimensionNames = array_map(function ($dimension) { |
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return $dimension[1]; |
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}, $element->getDimensions()); |
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array_unshift($dimensionNames, $element->getId()); |
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$currentEntity = current($this->rootEntities); |
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$lastAlias = key($this->aliasMap); |
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foreach ($dimensionNames as $i => $dimension) { |
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if (!$this->em->getClassMetadata($currentEntity)) { |
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throw new \Exception(sprintf('Metadata not found for entity "%s"', $currentEntity)); |
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} |
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// the current dimension is an alias (a table already joined for instance) |
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if (isset($this->aliasMap[$dimension])) { |
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$currentEntity = $this->getEntity($dimension); |
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$lastAlias = $dimension; |
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continue; |
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} |
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// the current dimension is a relation of the current entity |
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if ($this->relationExists($dimension, $currentEntity)) { |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($currentEntity); |
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$association = $classMetadata->getAssociationMapping($dimension); |
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if (!isset($this->knownEntities[$currentEntity], $this->knownEntities[$currentEntity][$association['fieldName']])) { |
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$alias = sprintf('_%d_%s', count($this->knownEntities), $dimension); |
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$this->saveAlias($currentEntity, $association['fieldName'], $alias); |
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} |
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$this->addDetectedJoin( |
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$lastAlias, |
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$dimension, |
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$alias = $this->getAlias($currentEntity, $association['fieldName']) |
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); |
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$currentEntity = $association['targetEntity']; |
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$lastAlias = $alias; |
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continue; |
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} |
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// the current dimension is an embedded class |
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if ($this->embeddedExists($dimension, $currentEntity)) { |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($currentEntity); |
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$embeddableMetadata = $classMetadata->embeddedClasses[$dimension]; |
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$currentEntity = $embeddableMetadata['class']; |
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$lastAlias = $lastAlias.'.'.$dimension; |
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continue; |
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} |
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// or, at last, it's a column access. |
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if ($this->columnExists($dimension, $currentEntity)) { |
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if (($i + 1) === count($dimensionNames)) { |
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return sprintf('%s.%s', $lastAlias, $dimension); |
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} |
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throw new \RuntimeException('Found scalar attribute in the middle of an access path.'); |
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} |
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throw new \Exception(sprintf('"%s" not found for entity "%s"', $dimension, $currentEntity)); |
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} |
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return $lastAlias; |
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} |
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private function columnExists($name, $rootEntity) |
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{ |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($rootEntity); |
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return $classMetadata->hasField($name); |
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} |
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private function relationExists($name, $rootEntity) |
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{ |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($rootEntity); |
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return $classMetadata->hasAssociation($name); |
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} |
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private function getRelation($name, $rootEntity) |
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{ |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($rootEntity); |
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return $classMetadata->getAssociationMapping($name); |
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} |
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private function embeddedExists($name, $rootEntity) |
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{ |
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/** @var \Doctrine\ORM\Mapping\ClassMetadataInfo $classMetadata */ |
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$classMetadata = $this->em->getClassMetadata($rootEntity); |
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return isset($classMetadata->embeddedClasses) && isset($classMetadata->embeddedClasses[$name]); |
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} |
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private function saveAlias($entity, $dimension, $alias) |
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{ |
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if (!isset($this->knownEntities[$entity])) { |
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$this->knownEntities[$entity] = []; |
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} |
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$this->knownEntities[$entity][$dimension] = $alias; |
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$this->aliasMap[$alias] = $entity; |
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} |
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private function getAlias($entity, $dimension) |
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{ |
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return $this->knownEntities[$entity][$dimension]; |
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} |
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private function getEntity($entity) |
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{ |
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return $this->aliasMap[$entity]; |
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} |
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} |
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K-Phoen /
rulerz
