content: package com.gitee.pifeng.monitoring.ui.business.web.service.impl;
  
  import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
  import com.baomidou.mybatisplus.core.metadata.IPage;
  import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
  import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
  import com.gitee.pifeng.monitoring.ui.business.web.dao.IMonitorRoleDao;
  import com.gitee.pifeng.monitoring.ui.business.web.entity.MonitorRole;
  import com.gitee.pifeng.monitoring.ui.business.web.service.IMonitorRoleService;
  import com.gitee.pifeng.monitoring.ui.business.web.vo.MonitorRoleVo;
  import com.google.common.collect.Lists;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.List;
  
  /**
   * <p>
   * 监控用户角色服务实现类
   * </p>
   *
   * @author 皮锋
   * @custom.date 2020/7/14 9:18
   */
  @Service
  public class MonitorRoleServiceImpl extends ServiceImpl<IMonitorRoleDao, MonitorRole> implements IMonitorRoleService {
  
      /**
       * 监控用户角色数据访问对象
       */
      @Autowired
      private IMonitorRoleDao monitorRoleDao;
  
      /**
       * <p>
       * 获取监控角色列表
       * </p>
       *
       * @param current 当前页
       * @param size    每页显示条数
       * @param roleId  角色ID
       * @return 分页Page对象
       * @author 皮锋
       * @custom.date 2020/8/3 11:07
       */
      @Override
      public Page<MonitorRoleVo> getMonitorRoleList(Long current, Long size, Long roleId) {
          // 查询数据库
          IPage<MonitorRole> ipage = new Page<>(current, size);
          LambdaQueryWrapper<MonitorRole> lambdaQueryWrapper = new LambdaQueryWrapper<>();
          if (roleId != null) {
              lambdaQueryWrapper.eq(MonitorRole::getId, roleId);
          }
          IPage<MonitorRole> monitorRolePage = this.monitorRoleDao.selectPage(ipage, lambdaQueryWrapper);
          List<MonitorRole> monitorRoles = monitorRolePage.getRecords();
          // 转换成监控角色表现层对象
          List<MonitorRoleVo> monitorRoleVos = Lists.newLinkedList();
          for (MonitorRole monitorRole : monitorRoles) {
              MonitorRoleVo monitorRoleVo = MonitorRoleVo.builder().build().convertFor(monitorRole);
              monitorRoleVos.add(monitorRoleVo);
          }
          // 设置返回对象
          Page<MonitorRoleVo> monitorRoleVoPage = new Page<>();
          monitorRoleVoPage.setRecords(monitorRoleVos);
          monitorRoleVoPage.setTotal(monitorRolePage.getTotal());
          return monitorRoleVoPage;
      }
  }
  