content: package com.snow.system.service.impl;
  
  import java.util.Comparator;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  import javax.annotation.PostConstruct;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import org.springframework.transaction.annotation.Transactional;
  import com.snow.common.core.constant.UserConstants;
  import com.snow.common.core.exception.ServiceException;
  import com.snow.common.core.utils.StringUtils;
  import com.snow.common.security.utils.DictUtils;
  import com.snow.system.api.domain.SysDictData;
  import com.snow.system.api.domain.SysDictType;
  import com.snow.system.mapper.SysDictDataMapper;
  import com.snow.system.mapper.SysDictTypeMapper;
  import com.snow.system.service.ISysDictTypeService;
  
  /**
   * 字典 业务层处理
   *
   * @author snow
   */
  @Service
  public class SysDictTypeServiceImpl implements ISysDictTypeService
  {
      @Autowired
      private SysDictTypeMapper dictTypeMapper;
  
      @Autowired
      private SysDictDataMapper dictDataMapper;
  
      /**
       * 项目启动时，初始化字典到缓存
       */
      @PostConstruct
      public void init()
      {
          loadingDictCache();
      }
  
      /**
       * 根据条件分页查询字典类型
       *
       * @param dictType 字典类型信息
       * @return 字典类型集合信息
       */
      @Override
      public List<SysDictType> selectDictTypeList(SysDictType dictType)
      {
          return dictTypeMapper.selectDictTypeList(dictType);
      }
  
      /**
       * 根据所有字典类型
       *
       * @return 字典类型集合信息
       */
      @Override
      public List<SysDictType> selectDictTypeAll()
      {
          return dictTypeMapper.selectDictTypeAll();
      }
  
      /**
       * 根据字典类型查询字典数据
       *
       * @param dictType 字典类型
       * @return 字典数据集合信息
       */
      @Override
      public List<SysDictData> selectDictDataByType(String dictType)
      {
          List<SysDictData> dictDatas = DictUtils.getDictCache(dictType);
          if (StringUtils.isNotEmpty(dictDatas))
          {
              return dictDatas;
          }
          dictDatas = dictDataMapper.selectDictDataByType(dictType);
          if (StringUtils.isNotEmpty(dictDatas))
          {
              DictUtils.setDictCache(dictType, dictDatas);
              return dictDatas;
          }
          return null;
      }
  
      /**
       * 根据字典类型ID查询信息
       *
       * @param dictId 字典类型ID
       * @return 字典类型
       */
      @Override
      public SysDictType selectDictTypeById(Long dictId)
      {
          return dictTypeMapper.selectDictTypeById(dictId);
      }
  
      /**
       * 根据字典类型查询信息
       *
       * @param dictType 字典类型
       * @return 字典类型
       */
      @Override
      public SysDictType selectDictTypeByType(String dictType)
      {
          return dictTypeMapper.selectDictTypeByType(dictType);
      }
  
      /**
       * 批量删除字典类型信息
       *
       * @param dictIds 需要删除的字典ID
       */
      @Override
      public void deleteDictTypeByIds(Long[] dictIds)
      {
          for (Long dictId : dictIds)
          {
              SysDictType dictType = selectDictTypeById(dictId);
              if (dictDataMapper.countDictDataByType(dictType.getDictType()) > 0)
              {
                  throw new ServiceException(String.format("%1$s已分配,不能删除", dictType.getDictName()));
              }
              dictTypeMapper.deleteDictTypeById(dictId);
              DictUtils.removeDictCache(dictType.getDictType());
          }
      }
  
      /**
       * 加载字典缓存数据
       */
      @Override
      public void loadingDictCache()
      {
          SysDictData dictData = new SysDictData();
          dictData.setStatus("0");
          Map<String, List<SysDictData>> dictDataMap = dictDataMapper.selectDictDataList(dictData).stream().collect(Collectors.groupingBy(SysDictData::getDictType));
          for (Map.Entry<String, List<SysDictData>> entry : dictDataMap.entrySet())
          {
              DictUtils.setDictCache(entry.getKey(), entry.getValue().stream().sorted(Comparator.comparing(SysDictData::getDictSort)).collect(Collectors.toList()));
          }
      }
  
      /**
       * 清空字典缓存数据
       */
      @Override
      public void clearDictCache()
      {
          DictUtils.clearDictCache();
      }
  
      /**
       * 重置字典缓存数据
       */
      @Override
      public void resetDictCache()
      {
          clearDictCache();
          loadingDictCache();
      }
  
      /**
       * 新增保存字典类型信息
       *
       * @param dict 字典类型信息
       * @return 结果
       */
      @Override
      public int insertDictType(SysDictType dict)
      {
          int row = dictTypeMapper.insertDictType(dict);
          if (row > 0)
          {
              DictUtils.setDictCache(dict.getDictType(), null);
          }
          return row;
      }
  
      /**
       * 修改保存字典类型信息
       *
       * @param dict 字典类型信息
       * @return 结果
       */
      @Override
      @Transactional(rollbackFor = Exception.class)
      public int updateDictType(SysDictType dict)
      {
          SysDictType oldDict = dictTypeMapper.selectDictTypeById(dict.getDictId());
          dictDataMapper.updateDictDataType(oldDict.getDictType(), dict.getDictType());
          int row = dictTypeMapper.updateDictType(dict);
          if (row > 0)
          {
              List<SysDictData> dictDatas = dictDataMapper.selectDictDataByType(dict.getDictType());
              DictUtils.setDictCache(dict.getDictType(), dictDatas);
          }
          return row;
      }
  
      /**
       * 校验字典类型称是否唯一
       *
       * @param dict 字典类型
       * @return 结果
       */
      @Override
      public boolean checkDictTypeUnique(SysDictType dict)
      {
          Long dictId = StringUtils.isNull(dict.getDictId()) ? -1L : dict.getDictId();
          SysDictType dictType = dictTypeMapper.checkDictTypeUnique(dict.getDictType());
          if (StringUtils.isNotNull(dictType) && dictType.getDictId().longValue() != dictId.longValue())
          {
              return UserConstants.NOT_UNIQUE;
          }
          return UserConstants.UNIQUE;
      }
  }
  