final public function initMetaEntity(Page $page, $metaName, $metaValue)
    {
        $this->initPageMetas($page);
        if (isset($this->pageMetas[$metaName]))
        {
            $entity = $this->pageMetas[$metaName];
        }
        else
        {
            $entity = new PageMeta();
            $entity->setPage($page);
            $entity->setMetaKey($metaName);
        }
        $entity->setMetaValue($metaValue);
        return $entity;
    }