Piwik\Db\Adapter::factory PHP Method

    public static function factory($adapterName, &$dbInfos, $connect = true)
    {
        if ($connect) {
            if ($dbInfos['port'][0] == '/') {
                $dbInfos['unix_socket'] = $dbInfos['port'];
                unset($dbInfos['host']);
                unset($dbInfos['port']);
            }
            // not used by Zend Framework
            unset($dbInfos['tables_prefix']);
            unset($dbInfos['adapter']);
            unset($dbInfos['schema']);
        }
        $className = self::getAdapterClassName($adapterName);
        // make sure not to pass any references otherwise they will modify $dbInfos
        $infos = array();
        foreach ($dbInfos as $key => $val) {
            $infos[$key] = $val;
        }
        $adapter = new $className($infos);
        if ($connect) {
            $adapter->getConnection();
            Zend_Db_Table::setDefaultAdapter($adapter);
            // we don't want the connection information to appear in the logs
            $adapter->resetConfig();
        }
        return $adapter;
    }

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     // Set memory limit to off
     @ini_set('memory_limit', -1);
     Piwik::doAsSuperUser(function () use($input, $output) {
         $settings = new MigratorSettings();
         $settings->idSite = $input->getArgument('idSite');
         $settings->site = $this->getSite($settings->idSite);
         $settings->dateFrom = $input->getOption('date-from') ? new \DateTime($input->getOption('date-from')) : null;
         $settings->dateTo = $input->getOption('date-to') ? new \DateTime($input->getOption('date-to')) : null;
         $settings->skipArchiveData = $input->getOption('skip-archive-data');
         $settings->skipLogData = $input->getOption('skip-log-data');
         $config = Db::getDatabaseConfig();
         $startTime = microtime(true);
         $this->createTargetDatabaseConfig($input, $output, $config);
         $tmpConfig = $config;
         $sourceDb = Db::get();
         try {
             $targetDb = @Db\Adapter::factory($config['adapter'], $tmpConfig);
         } catch (\Exception $e) {
             throw new \RuntimeException('Unable to connect to the target database: ' . $e->getMessage(), 0, $e);
         }
         $sourceDbHelper = new DBHelper($sourceDb, Db::getDatabaseConfig());
         $migratorFacade = new Migrator($sourceDbHelper, new DBHelper($targetDb, $config), GCHelper::getInstance(), $settings, new ArchiveLister($sourceDbHelper));
         $migratorFacade->migrate();
         $endTime = microtime(true);
         Log::debug(sprintf('Time taken: %01.2f sec', $endTime - $startTime));
         Log::debug(sprintf('Peak memory usage: %01.2f MB', memory_get_peak_usage(true) / 1048576));
     });
 }