package cn.lihu.jh.module.infra.service.demo.demo02;
|
|
import cn.lihu.jh.framework.common.util.object.BeanUtils;
|
import cn.lihu.jh.module.infra.controller.admin.demo.demo02.vo.Demo02CategoryListReqVO;
|
import cn.lihu.jh.module.infra.controller.admin.demo.demo02.vo.Demo02CategorySaveReqVO;
|
import cn.lihu.jh.module.infra.dal.dataobject.demo.demo02.Demo02CategoryDO;
|
import cn.lihu.jh.module.infra.dal.mysql.demo.demo02.Demo02CategoryMapper;
|
import org.springframework.stereotype.Service;
|
import org.springframework.validation.annotation.Validated;
|
|
import javax.annotation.Resource;
|
import java.util.List;
|
import java.util.Objects;
|
|
import static cn.lihu.jh.framework.common.exception.util.ServiceExceptionUtil.exception;
|
import static cn.lihu.jh.module.infra.enums.ErrorCodeConstants.*;
|
|
/**
|
* 示例分类 Service 实现类
|
*
|
* @author 芋道源码
|
*/
|
@Service
|
@Validated
|
public class Demo02CategoryServiceImpl implements Demo02CategoryService {
|
|
@Resource
|
private Demo02CategoryMapper demo02CategoryMapper;
|
|
@Override
|
public Long createDemo02Category(Demo02CategorySaveReqVO createReqVO) {
|
// 校验父级编号的有效性
|
validateParentDemo02Category(null, createReqVO.getParentId());
|
// 校验名字的唯一性
|
validateDemo02CategoryNameUnique(null, createReqVO.getParentId(), createReqVO.getName());
|
|
// 插入
|
Demo02CategoryDO demo02Category = BeanUtils.toBean(createReqVO, Demo02CategoryDO.class);
|
demo02CategoryMapper.insert(demo02Category);
|
// 返回
|
return demo02Category.getId();
|
}
|
|
@Override
|
public void updateDemo02Category(Demo02CategorySaveReqVO updateReqVO) {
|
// 校验存在
|
validateDemo02CategoryExists(updateReqVO.getId());
|
// 校验父级编号的有效性
|
validateParentDemo02Category(updateReqVO.getId(), updateReqVO.getParentId());
|
// 校验名字的唯一性
|
validateDemo02CategoryNameUnique(updateReqVO.getId(), updateReqVO.getParentId(), updateReqVO.getName());
|
|
// 更新
|
Demo02CategoryDO updateObj = BeanUtils.toBean(updateReqVO, Demo02CategoryDO.class);
|
demo02CategoryMapper.updateById(updateObj);
|
}
|
|
@Override
|
public void deleteDemo02Category(Long id) {
|
// 校验存在
|
validateDemo02CategoryExists(id);
|
// 校验是否有子示例分类
|
if (demo02CategoryMapper.selectCountByParentId(id) > 0) {
|
throw exception(DEMO02_CATEGORY_EXITS_CHILDREN);
|
}
|
// 删除
|
demo02CategoryMapper.deleteById(id);
|
}
|
|
private void validateDemo02CategoryExists(Long id) {
|
if (demo02CategoryMapper.selectById(id) == null) {
|
throw exception(DEMO02_CATEGORY_NOT_EXISTS);
|
}
|
}
|
|
private void validateParentDemo02Category(Long id, Long parentId) {
|
if (parentId == null || Demo02CategoryDO.PARENT_ID_ROOT.equals(parentId)) {
|
return;
|
}
|
// 1. 不能设置自己为父示例分类
|
if (Objects.equals(id, parentId)) {
|
throw exception(DEMO02_CATEGORY_PARENT_ERROR);
|
}
|
// 2. 父示例分类不存在
|
Demo02CategoryDO parentDemo02Category = demo02CategoryMapper.selectById(parentId);
|
if (parentDemo02Category == null) {
|
throw exception(DEMO02_CATEGORY_PARENT_NOT_EXITS);
|
}
|
// 3. 递归校验父示例分类，如果父示例分类是自己的子示例分类，则报错，避免形成环路
|
if (id == null) { // id 为空，说明新增，不需要考虑环路
|
return;
|
}
|
for (int i = 0; i < Short.MAX_VALUE; i++) {
|
// 3.1 校验环路
|
parentId = parentDemo02Category.getParentId();
|
if (Objects.equals(id, parentId)) {
|
throw exception(DEMO02_CATEGORY_PARENT_IS_CHILD);
|
}
|
// 3.2 继续递归下一级父示例分类
|
if (parentId == null || Demo02CategoryDO.PARENT_ID_ROOT.equals(parentId)) {
|
break;
|
}
|
parentDemo02Category = demo02CategoryMapper.selectById(parentId);
|
if (parentDemo02Category == null) {
|
break;
|
}
|
}
|
}
|
|
private void validateDemo02CategoryNameUnique(Long id, Long parentId, String name) {
|
Demo02CategoryDO demo02Category = demo02CategoryMapper.selectByParentIdAndName(parentId, name);
|
if (demo02Category == null) {
|
return;
|
}
|
// 如果 id 为空，说明不用比较是否为相同 id 的示例分类
|
if (id == null) {
|
throw exception(DEMO02_CATEGORY_NAME_DUPLICATE);
|
}
|
if (!Objects.equals(demo02Category.getId(), id)) {
|
throw exception(DEMO02_CATEGORY_NAME_DUPLICATE);
|
}
|
}
|
|
@Override
|
public Demo02CategoryDO getDemo02Category(Long id) {
|
return demo02CategoryMapper.selectById(id);
|
}
|
|
@Override
|
public List<Demo02CategoryDO> getDemo02CategoryList(Demo02CategoryListReqVO listReqVO) {
|
return demo02CategoryMapper.selectList(listReqVO);
|
}
|
|
}
|
