/**
* 更新新菜品分类
*
* @param categoryVO 菜品分类值对象，包含需要更新的数据
* @return 更新后的菜品分类值对象
* @throws DuplicateNameException 菜品分类命名重复异常
* @throws CategoryNotFoundException 菜品分类不存在异常
*/
@Transactional(
propagation = Propagation.REQUIRED,
readOnly = false,
rollbackFor = Exception.class)
public Category updateCategory(CategoryVO categoryVO)
throws DuplicateNameException, CategoryNotFoundException {
// 1. 检查需要更新的菜品分类是否存在
Category category = this.getCategoryById(categoryVO.getId());
Category checkedCategory = categoryDao.getCategoryByName(categoryVO.getName());
// 2. 检查是否有同名菜品分类
if (checkedCategory != null && checkedCategory.getId() != categoryVO.getId()) {
throw new DuplicateNameException(
MessageUtil.getMessage("category_name_msg", categoryVO.getName()));
} else {
// 3. 更新菜品分类
category.setName(categoryVO.getName());
category.setPicPath(categoryVO.getPicPath());
category.setUpdateDate(new Date());
categoryDao.update(category);
}
return category;
}
/**
* 添加新菜品分类
*
* @param categoryVO 菜品分类值对象
* @return 新创建的菜品分类对象
* @throws DuplicateNameException 菜品分类命名重复异常
*/
@Transactional(
propagation = Propagation.REQUIRED,
readOnly = false,
rollbackFor = Exception.class)
public Category addCategory(CategoryVO categoryVO) throws DuplicateNameException {
Category category = null;
// 1. 检查是否有同名菜品分类
if (null == categoryDao.getCategoryByName(categoryVO.getName())) {
category = new Category();
category.setName(categoryVO.getName());
category.setPicPath(categoryVO.getPicPath());
category.setCreateDate(new Date());
Long categoryId = categoryDao.save(category);
category = categoryDao.get(categoryId);
} else {
throw new DuplicateNameException(
MessageUtil.getMessage("category_name_msg", categoryVO.getName()));
}
return category;
}