CategoryEjb.java 文件源码

public List<Category> getAllCategories(boolean withSub){

        TypedQuery<Category> query = em.createQuery("select c from Category c", Category.class);
        List<Category> categories = query.getResultList();

        if(withSub){
            //force loading
            categories.forEach(c -> c.getSubCategories().size());
        }

        return categories;
    }