Nextras\Orm\Mapper\Memory\ArrayMapper::persist PHP Метод

    public function persist(IEntity $entity)
    {
        $this->initializeData();
        $data = $this->entityToArray($entity);
        $data = $this->getStorageReflection()->convertEntityToStorage($data);
        if ($entity->isPersisted()) {
            $id = $entity->getPersistedId();
            $primaryValue = implode(',', (array) $id);
        } else {
            $this->lock();
            try {
                $storedData = $this->readEntityData();
                if (!$entity->hasValue('id')) {
                    $id = $storedData ? max(array_keys($storedData)) + 1 : 1;
                    $storagePrimaryKey = $this->storageReflection->getStoragePrimaryKey();
                    $data[$storagePrimaryKey[0]] = $id;
                } else {
                    $id = $entity->getValue('id');
                }
                $primaryValue = implode(',', (array) $id);
                if (isset($storedData[$primaryValue])) {
                    throw new InvalidStateException("Unique constraint violation: entity with '{$primaryValue}' primary value already exists.");
                }
                $storedData[$primaryValue] = null;
                $this->saveEntityData($storedData);
            } finally {
                $this->unlock();
            }
        }
        $this->data[$primaryValue] = $entity;
        $this->dataToStore[$primaryValue] = $data;
        return $id;
    }