Eccube\Form\Type\Admin\MasterdataType::buildForm PHP Method

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        /** @var $app \Eccube\Application */
        $app = $this->app;
        $masterdata = array();
        $driverChain = $app['orm.em']->getConfiguration()->getMetadataDriverImpl();
        $drivers = $driverChain->getDrivers();
        foreach ($drivers as $namespace => $driver) {
            if ($namespace == 'Eccube\\Entity') {
                $classNames = $driver->getAllClassNames();
                foreach ($classNames as $className) {
                    $meta = $app['orm.em']->getMetadataFactory()->getMetadataFor($className);
                    if (strpos($meta->rootEntityName, 'Master') !== false && $meta->hasField('id') && $meta->hasField('name') && $meta->hasField('rank')) {
                        $metadataName = str_replace('\\', '-', $meta->getName());
                        $masterdata[$metadataName] = $meta->getTableName();
                    }
                }
            }
        }
        $builder->add('masterdata', 'choice', array('choices' => $masterdata, 'expanded' => false, 'multiple' => false, 'constraints' => array(new Assert\NotBlank())));
    }