use Eccube\Form\DataTransformer;

class BannerType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {

        $transformer = new DataTransformer\IntegerToBooleanTransformer();

        $builder
            ->add($builder->create('link_method', 'checkbox', array(
                'required' => false,
                'label' => '別ウィンドウを開く',
                'value' => '1',
            ))->addModelTransformer($transformer))
        ;
    }