doctrine / mongodb-odm

            case ClassMetadata::GENERATOR_TYPE_AUTO:

                $class->setIdGenerator(new AutoGenerator());

                break;

            case ClassMetadata::GENERATOR_TYPE_INCREMENT:

                $incrementGenerator = new IncrementGenerator();

                if (isset($idGenOptions['key'])) {

                    $incrementGenerator->setKey($idGenOptions['key']);

                }

                if (isset($idGenOptions['collection'])) {

                    $incrementGenerator->setCollection($idGenOptions['collection']);

                }

                if (isset($idGenOptions['startingId'])) {

                    $incrementGenerator->setStartingId((int) $idGenOptions['startingId']);

                }

                $class->setIdGenerator($incrementGenerator);

                break;

            case ClassMetadata::GENERATOR_TYPE_UUID:

                $uuidGenerator = new UuidGenerator();

                isset($idGenOptions['salt']) && $uuidGenerator->setSalt($idGenOptions['salt']);

                isset($idGenOptions['salt']) && $uuidGenerator->setSalt($idGenOptions['salt']);

                $class->setIdGenerator($uuidGenerator);

                break;

            case ClassMetadata::GENERATOR_TYPE_ALNUM:

                $alnumGenerator = new AlnumGenerator();

                if (isset($idGenOptions['pad'])) {

                    $alnumGenerator->setPad($idGenOptions['pad']);

                }

                if (isset($idGenOptions['chars'])) {

                    $alnumGenerator->setChars($idGenOptions['chars']);

                } elseif (isset($idGenOptions['awkwardSafe'])) {

                    $alnumGenerator->setAwkwardSafeMode($idGenOptions['awkwardSafe']);

                }

                $class->setIdGenerator($alnumGenerator);

                break;

            case ClassMetadata::GENERATOR_TYPE_CUSTOM:

                if (empty($idGenOptions['class'])) {

                    throw MappingException::missingIdGeneratorClass($class->name);