public function executeJson(AgaviRequestDataHolder $rd)
{
if ($this->hasAttribute('categories')) {
$categories = $this->getAttribute('categories', array());
$json = new AppKitExtJsonDocument();
$json->setAttribute(AppKitExtJsonDocument::ATTR_AUTODISCOVER);
$json->setMeta(AppKitExtJsonDocument::PROPERTY_ID, 'catid');
$json->setData($categories);
$json->setSuccess(true);
return $json->getJson();
}
}