最新版本541200007

doum

3 天以前 0c3e6b2d5edd46c3476a1a51a70540258b3c39dc

 server/visits/dmvisit_service/src/main/java/com/doumee/service/business/impl/JkCustomerServiceImpl.java

@@ -1,20 +1,44 @@
package com.doumee.service.business.impl;

import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.doumee.biz.system.SystemDictDataBiz;
import com.doumee.core.annotation.excel.ExcelImporter;
import com.doumee.core.constants.ResponseStatus;
import com.doumee.core.exception.BusinessException;
import com.doumee.core.utils.Constants;
import com.doumee.core.utils.HttpsUtil;
import com.doumee.dao.admin.request.JkCustomerImport;
import com.doumee.dao.admin.request.JkLineImport;
import com.doumee.dao.business.JkLineMapper;
import com.doumee.dao.business.model.*;
import com.doumee.dao.system.model.SystemUser;
import com.doumee.service.business.third.model.LoginUserInfo;
import com.doumee.service.business.third.model.PageData;
import com.doumee.service.business.third.model.PageWrap;
import com.doumee.core.utils.Utils;
import com.doumee.dao.business.JkCustomerMapper;
import com.doumee.dao.business.model.JkCustomer;
import com.doumee.service.business.JkCustomerService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.github.yulichang.wrapper.MPJLambdaWrapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.web.multipart.MultipartFile;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * 交控-客户信息表Service实现
@@ -22,11 +46,18 @@
 * @date 2025/09/28 09:01
 */
@Service
@Slf4j
public class JkCustomerServiceImpl implements JkCustomerService {

    @Autowired
    private JkCustomerMapper jkCustomerMapper;
    @Autowired
    private JkLineMapper jkLineMapper;
    @Autowired
    private SystemDictDataBiz systemDictDataBiz;

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;
    @Override
    public Integer create(JkCustomer jkCustomer) {
        jkCustomerMapper.insert(jkCustomer);
@@ -34,8 +65,13 @@
    }

    @Override
    public void deleteById(Integer id) {
        jkCustomerMapper.deleteById(id);
    public void deleteById(Integer id,LoginUserInfo user) {
        jkCustomerMapper.update(null,new UpdateWrapper<JkCustomer>().lambda()
                .set(JkCustomer::getIsdeleted,Constants.ONE)
                .set(JkCustomer::getEditor,user.getId())
                .set(JkCustomer::getEditDate,new Date())
                .eq(JkCustomer::getId,id)
        );
    }

    @Override
@@ -45,16 +81,45 @@
    }

    @Override
    public void deleteByIdInBatch(List<Integer> ids) {
    public void deleteByIdInBatch(List<Integer> ids,LoginUserInfo user) {
        if (CollectionUtils.isEmpty(ids)) {
            return;
        }
        jkCustomerMapper.deleteBatchIds(ids);
        jkCustomerMapper.update(null,new UpdateWrapper<JkCustomer>().lambda()
                .set(JkCustomer::getIsdeleted,Constants.ONE)
                .set(JkCustomer::getEditor,user.getId())
                .set(JkCustomer::getEditDate,new Date())
                .in(JkCustomer::getId,ids)
        );
    }

    @Override
    public void updateById(JkCustomer jkCustomer) {
        jkCustomerMapper.updateById(jkCustomer);
        if(jkCustomer.getId() == null
            ||jkCustomer.getLocationInfo() ==null ){
                throw  new BusinessException(ResponseStatus.BAD_REQUEST);
        }
        String[] strs = jkCustomer.getLocationInfo().split(",");
        jkCustomer.setLongitude(getDecimalByVal(strs[0]));//经度
        jkCustomer.setLatitude(strs.length>1?getDecimalByVal(strs[1]):null);//纬度
        if(jkCustomer.getLatitude() == null || jkCustomer.getLongitude() ==null){
            //非成对出现，无效经纬度不维护
            throw  new BusinessException(ResponseStatus.BAD_REQUEST);
        }

        jkCustomerMapper.update(null,new UpdateWrapper<JkCustomer>().lambda()
                .set(JkCustomer::getLatitude,jkCustomer.getLatitude())
                .set(JkCustomer::getLongitude,jkCustomer.getLongitude())
                .set(JkCustomer::getEditor,jkCustomer.getLoginUserInfo().getId())
                .set(JkCustomer::getStartDistance,null)
                .set(JkCustomer::getEndDistance,null)
                .set(JkCustomer::getStartSteps,null)
                .set(JkCustomer::getEndSteps,null)
                .set(JkCustomer::getDistanceStatus,Constants.ZERO)
                .set(JkCustomer::getDistance,null)
                .set(JkCustomer::getEditDate,new Date())
                .eq(JkCustomer::getId,jkCustomer.getId())
        );
    }

    @Override
@@ -87,71 +152,332 @@
    @Override
    public PageData<JkCustomer> findPage(PageWrap<JkCustomer> pageWrap) {
        IPage<JkCustomer> page = new Page<>(pageWrap.getPage(), pageWrap.getCapacity());
        QueryWrapper<JkCustomer> queryWrapper = new QueryWrapper<>();
        MPJLambdaWrapper<JkCustomer> queryWrapper = new MPJLambdaWrapper<>();
        Utils.MP.blankToNull(pageWrap.getModel());
        pageWrap.getModel().setIsdeleted(Constants.ZERO);
        queryWrapper.selectAll(JkCustomer.class )
                .selectAs(JkLine::getName,JkCustomer::getLineName)
                .selectAs(JkLine::getWeeks,JkCustomer::getLineWeeks)
                .selectAs(Category::getId,JkCustomer::getCategoryId)
                .selectAs(Category::getName,JkCustomer::getCategoryName)
                .leftJoin(JkLine.class,JkLine::getId,JkCustomer::getLineId )
                .leftJoin(Category.class,Category::getId,JkLine::getCategoryId );
        queryWrapper.eq( pageWrap.getModel().getDistanceStatus()!=null,JkCustomer::getDistanceStatus, pageWrap.getModel().getDistanceStatus());
        queryWrapper.eq( pageWrap.getModel().getCategoryId()!=null,JkLine::getCategoryId, pageWrap.getModel().getCategoryId());
        queryWrapper.eq(StringUtils.isNotBlank(pageWrap.getModel().getLineWeeks()),JkLine::getWeeks, pageWrap.getModel().getLineWeeks());
        queryWrapper.like(StringUtils.isNotBlank(pageWrap.getModel().getCategoryName()),Category::getName, pageWrap.getModel().getCategoryName());
        queryWrapper.like(StringUtils.isNotBlank(pageWrap.getModel().getLineName()),JkLine::getName, pageWrap.getModel().getLineName());
        queryWrapper.like(StringUtils.isNotBlank(pageWrap.getModel().getCategoryName()),Category::getName, pageWrap.getModel().getCategoryName());
        if (pageWrap.getModel().getId() != null) {
            queryWrapper.lambda().eq(JkCustomer::getId, pageWrap.getModel().getId());
            queryWrapper.eq(JkCustomer::getId, pageWrap.getModel().getId());
        }
        if (pageWrap.getModel().getCreator() != null) {
            queryWrapper.lambda().eq(JkCustomer::getCreator, pageWrap.getModel().getCreator());
            queryWrapper.eq(JkCustomer::getCreator, pageWrap.getModel().getCreator());
        }
        if (pageWrap.getModel().getCreateDate() != null) {
            queryWrapper.lambda().ge(JkCustomer::getCreateDate, Utils.Date.getStart(pageWrap.getModel().getCreateDate()));
            queryWrapper.lambda().le(JkCustomer::getCreateDate, Utils.Date.getEnd(pageWrap.getModel().getCreateDate()));
            queryWrapper.ge(JkCustomer::getCreateDate, Utils.Date.getStart(pageWrap.getModel().getCreateDate()));
            queryWrapper.le(JkCustomer::getCreateDate, Utils.Date.getEnd(pageWrap.getModel().getCreateDate()));
        }
        if (pageWrap.getModel().getEditor() != null) {
            queryWrapper.lambda().eq(JkCustomer::getEditor, pageWrap.getModel().getEditor());
            queryWrapper.eq(JkCustomer::getEditor, pageWrap.getModel().getEditor());
        }
        if (pageWrap.getModel().getEditDate() != null) {
            queryWrapper.lambda().ge(JkCustomer::getEditDate, Utils.Date.getStart(pageWrap.getModel().getEditDate()));
            queryWrapper.lambda().le(JkCustomer::getEditDate, Utils.Date.getEnd(pageWrap.getModel().getEditDate()));
            queryWrapper.ge(JkCustomer::getEditDate, Utils.Date.getStart(pageWrap.getModel().getEditDate()));
            queryWrapper.le(JkCustomer::getEditDate, Utils.Date.getEnd(pageWrap.getModel().getEditDate()));
        }
        if (pageWrap.getModel().getIsdeleted() != null) {
            queryWrapper.lambda().eq(JkCustomer::getIsdeleted, pageWrap.getModel().getIsdeleted());
            queryWrapper.eq(JkCustomer::getIsdeleted, pageWrap.getModel().getIsdeleted());
        }
        if (pageWrap.getModel().getInfo() != null) {
            queryWrapper.lambda().eq(JkCustomer::getInfo, pageWrap.getModel().getInfo());
            queryWrapper.eq(JkCustomer::getInfo, pageWrap.getModel().getInfo());
        }
        if (pageWrap.getModel().getName() != null) {
            queryWrapper.lambda().eq(JkCustomer::getName, pageWrap.getModel().getName());
            queryWrapper.like(JkCustomer::getName, pageWrap.getModel().getName());
        }
        if (pageWrap.getModel().getCode() != null) {
            queryWrapper.lambda().eq(JkCustomer::getCode, pageWrap.getModel().getCode());
            queryWrapper.like(JkCustomer::getCode, pageWrap.getModel().getCode());
        }
        if (pageWrap.getModel().getLacation() != null) {
            queryWrapper.lambda().eq(JkCustomer::getLacation, pageWrap.getModel().getLacation());
        if (pageWrap.getModel().getLocation() != null) {
            queryWrapper.like(JkCustomer::getLocation, pageWrap.getModel().getLocation());
        }
        if (pageWrap.getModel().getLongitude() != null) {
            queryWrapper.lambda().eq(JkCustomer::getLongitude, pageWrap.getModel().getLongitude());
            queryWrapper.eq(JkCustomer::getLongitude, pageWrap.getModel().getLongitude());
        }
        if (pageWrap.getModel().getLatitude() != null) {
            queryWrapper.lambda().eq(JkCustomer::getLatitude, pageWrap.getModel().getLatitude());
            queryWrapper.eq(JkCustomer::getLatitude, pageWrap.getModel().getLatitude());
        }
        if (pageWrap.getModel().getWeeks() != null) {
            queryWrapper.lambda().eq(JkCustomer::getWeeks, pageWrap.getModel().getWeeks());
        if (pageWrap.getModel().getSortno() != null) {
            queryWrapper.eq(JkCustomer::getSortno, pageWrap.getModel().getSortno());
        }
        if (pageWrap.getModel().getLineId() != null) {
            queryWrapper.lambda().eq(JkCustomer::getLineId, pageWrap.getModel().getLineId());
            queryWrapper.eq(JkCustomer::getLineId, pageWrap.getModel().getLineId());
        }
        if (pageWrap.getModel().getStatus() != null) {
            queryWrapper.lambda().eq(JkCustomer::getStatus, pageWrap.getModel().getStatus());
            queryWrapper.eq(JkCustomer::getStatus, pageWrap.getModel().getStatus());
        }
        if (pageWrap.getModel().getSortnum() != null) {
            queryWrapper.lambda().eq(JkCustomer::getSortnum, pageWrap.getModel().getSortnum());
            queryWrapper.eq(JkCustomer::getSortnum, pageWrap.getModel().getSortnum());
        }
        for(PageWrap.SortData sortData: pageWrap.getSorts()) {
            if (sortData.getDirection().equalsIgnoreCase(PageWrap.DESC)) {
                queryWrapper.orderByDesc(sortData.getProperty());
            } else {
                queryWrapper.orderByAsc(sortData.getProperty());

        queryWrapper.orderByAsc(JkCustomer::getCode);
        IPage<JkCustomer> result = jkCustomerMapper.selectJoinPage(page, JkCustomer.class,queryWrapper);
        if(result.getRecords()!=null && result.getRecords().size()>0){
            for(JkCustomer model :result.getRecords()){
                if(model.getLongitude()!=null && model.getLatitude()!=null){
                    model.setLocationInfo(model.getLongitude().setScale(6, RoundingMode.HALF_UP).doubleValue()
                            +","+model.getLatitude().setScale(6, RoundingMode.HALF_UP).doubleValue());
                }
            }
        }
        return PageData.from(jkCustomerMapper.selectPage(page, queryWrapper));
        return PageData.from(result);
    }

    @Override
    public     void checkNullLocation() {
        log.error("更新交控中心客户经纬度信息===============开始");
        Boolean importing = (Boolean) redisTemplate.opsForValue().get(Constants.RedisKeys.CHECKING_JKCUSTOMER_LOCATION);
        if(importing!=null && importing){
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(),"对不起，上次任务正在执行中，请稍后再试！");
        }
        redisTemplate.opsForValue().set(Constants.RedisKeys.CHECKING_JKCUSTOMER_LOCATION,true);
        try {
            LambdaQueryWrapper<JkCustomer> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.isNotNull(JkCustomer::getLocation);
            queryWrapper.and(wrapper ->{
                wrapper.isNull(JkCustomer::getLatitude)
                        .or().isNull(JkCustomer::getLongitude)
                        .or().eq(JkCustomer::getDistanceStatus,Constants.TWO);});
            //查询全部有地址，但是没有经纬度的客户信息
            List<JkCustomer>  list = jkCustomerMapper.selectList(queryWrapper);
            if(list ==null || list.size()==0){
                return;
            }
            String url = systemDictDataBiz.queryByCode(Constants.SYSTEM,Constants.GAODE_LOCATION_GEOAPI_URL).getCode();
            for(JkCustomer c : list){
                try {
                    String urlStr =url.replace("${param}"
                            ,c.getLocation().replaceAll("[^a-zA-Z0-9\\u4e00-\\u9fa5]", ""));
                    String result = HttpsUtil.get(urlStr,true);
                    JSONObject json = JSONObject.parseObject(result);
                    if(json!=null
                            && json.getInteger("status")!=null
                            && json.getInteger("status") ==1
                            && json.getJSONArray("geocodes")!=null
                            && json.getJSONArray("geocodes").size()>0
                            && json.getJSONArray("geocodes").getJSONObject(0)!=null
                            && json.getJSONArray("geocodes").getJSONObject(0).getString("location")!=null){
                        //请求成功
                        String[] strs =json.getJSONArray("geocodes").getJSONObject(0).getString("location").split(",");
                        c.setLongitude(getDecimalByVal(strs[0]));//经度
                        c.setLatitude(strs.length>1?getDecimalByVal(strs[1]):null);//纬度
                        if(c.getLatitude() != null && c.getLongitude() !=null){
                            //非成对出现，无效经纬度不维护
                            jkCustomerMapper.update(null,new UpdateWrapper<JkCustomer>().lambda()
                                    .set(JkCustomer::getLatitude,c.getLatitude())
                                    .set(JkCustomer::getLongitude,c.getLongitude())
                                    .set(JkCustomer::getStartDistance,null)
                                    .set(JkCustomer::getEndDistance,null)
                                    .set(JkCustomer::getStartSteps,null)
                                    .set(JkCustomer::getEndSteps,null)
                                    .set(JkCustomer::getDistanceStatus,Constants.ZERO)
                                    .set(JkCustomer::getDistance,null)
                                    .set(JkCustomer::getEditDate,new Date())
                                    .eq(JkCustomer::getId,c.getId())
                            );
                        }
                    }else{
                        log.error("更新交控中心客户经纬度信息=====获取json=========="+urlStr+"\n"+c.getName()+"\n"+json);
                    }
                }catch (Exception e){
                    log.error("更新交控中心客户经纬度信息=====失败=========="+c.getName()+"-"+c.getLocation());
                }
            }
        }catch (Exception e){
                log.error("更新交控中心客户经纬度信息===============",e.getMessage());
        }finally {
            redisTemplate.delete(Constants.RedisKeys.CHECKING_JKCUSTOMER_LOCATION);
        }
        log.error("更新交控中心客户经纬度信息===============结束");

    }
    @Override
    public long count(JkCustomer jkCustomer) {
        QueryWrapper<JkCustomer> wrapper = new QueryWrapper<>(jkCustomer);
        return jkCustomerMapper.selectCount(wrapper);
    }


    @Override
    @Transactional(rollbackFor = {BusinessException.class,Exception.class})
    public List<JkCustomer> importBatch(MultipartFile file, LoginUserInfo loginUserInfo){
        Boolean importing = (Boolean) redisTemplate.opsForValue().get(Constants.RedisKeys.IMPORTING_JKCUSTOMER);
        if(importing!=null && importing){
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(),"对不起，已存在导入任务正在执行中，请稍后再试！");
        }
        redisTemplate.opsForValue().set(Constants.RedisKeys.IMPORTING_JKCUSTOMER,true,30, TimeUnit.MINUTES);
        try {
            ExcelImporter ie = null;
            List<JkCustomerImport> dataList =null;
            try {
                ie = new ExcelImporter(file,1,0);
                dataList = ie.getDataList(JkCustomerImport.class,null);
            }  catch (Exception e) {
                e.printStackTrace();
            }
            if(dataList == null || dataList.size() ==0){
                throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(),"对不起，录入数据为空！");
            }
            //当前所有线路
            List<JkLine> lineList =  jkLineMapper.selectJoinList(JkLine.class,new MPJLambdaWrapper<JkLine>()
                    .selectAll(JkLine.class)
                    .eq(JkLine::getIsdeleted,Constants.ZERO)
            );
            List<JkCustomer> allList =  jkCustomerMapper.selectJoinList(JkCustomer.class,new MPJLambdaWrapper<JkCustomer>()
                    .selectAll(JkCustomer.class)
                    .eq(JkCustomer::getIsdeleted,Constants.ZERO)
            );

            List<JkCustomer> newList = new ArrayList<>();
            List<JkCustomer> updateList = new ArrayList<>();
            for(int i=0;i<dataList.size();i++){
                JkCustomerImport model = dataList.get(i);
                if(StringUtils.isBlank(model.getName())
                        &&StringUtils.isBlank(model.getCode())
                        &&StringUtils.isBlank(model.getLocation())
                        &&StringUtils.isBlank(model.getSortno())
                        &&StringUtils.isBlank(model.getLocationInfo())
                        &&StringUtils.isBlank(model.getLineName()) ){
                    continue;
                }
                checkModelParam(model,newList,updateList,i,loginUserInfo,allList,lineList );
            }
            if((newList == null || newList.size() ==0) && updateList.size() == 0){
                throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(),"对不起，录入有效数据为空！");
            }
            if(newList.size()>0){
                jkCustomerMapper.insert(newList);
            }
            if(updateList.size()>0){
                for (JkCustomer c : updateList){
                    jkCustomerMapper.updateById(c);
                }
            }
            newList.addAll(updateList);
            return newList;
        }catch (BusinessException e){
            throw e;
        }catch (Exception e){
            e.printStackTrace();
            throw  new BusinessException(ResponseStatus.SERVER_ERROR.getCode(),"信息导入失败，请稍后重试");
        }finally {
            redisTemplate.delete(Constants.RedisKeys.IMPORTING_JKCUSTOMER);
        }

    }


    private JkCustomer checkModelParam(JkCustomerImport model, List<JkCustomer> newList
            , List<JkCustomer> updateList
            ,int index
            ,LoginUserInfo loginUserInfo
            ,List<JkCustomer> allList
            ,List<JkLine> lineList ) {
        if(StringUtils.isBlank(model.getName())
                ||StringUtils.isBlank(model.getCode())
                ||StringUtils.isBlank(model.getLocation()) ){
            throw  new BusinessException(ResponseStatus.BAD_REQUEST.getCode(),"对不起，第"+(index+3)+"行客户信息不完整，请检查表格内容！");
        }
        for(JkCustomer param: newList){
            if(StringUtils.isNotBlank(model.getCode())&&StringUtils.isNotBlank(param.getCode())) {
                if (StringUtils.equals(model.getCode(), param.getCode())) {
                    throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "对不起，第" + (index + 3) + "行客户简码【" + model.getName() + "】重复出现，请检查表格内容！");
                }
            }
        }
        JkLine line = findLineFromListByName(model.getLineName(),lineList);
        if(line == null){
            throw new BusinessException(ResponseStatus.BAD_REQUEST.getCode(), "对不起，第" + (index + 3) + "行线路【" + model.getLineName() + "】不存在，请检查表格内容！");
        }

        JkCustomer tModel = findModelFromList(model.getCode(),allList);
        if(tModel == null){
            tModel = new JkCustomer();
            tModel.setCreator(loginUserInfo.getId());
            tModel.setCreateDate(new Date());
            tModel.setIsnew(Constants.ONE);
            tModel.setDistanceStatus(Constants.TWO);//需要重新定位
            tModel.setStatus(Constants.ZERO);
            tModel.setDistanceStatus(Constants.ZERO);
            newList.add(tModel);
        }else{
            if(StringUtils.isBlank(model.getLocation()) ||
                    StringUtils.equals(tModel.getLocation().replaceAll("[^a-zA-Z0-9\\u4e00-\\u9fa5]","")
                    ,model.getLocation().replaceAll("[^a-zA-Z0-9\\u4e00-\\u9fa5]",""))){
                //如果位置信息发生变化
                tModel.setDistanceStatus(Constants.TWO);//需要重新定位
            }
            tModel.setIsnew(Constants.ZERO);
            updateList.add(tModel);
        }
        tModel.setName(model.getName());
        tModel.setCode(model.getCode());
        tModel.setLocation(model.getLocation());
        tModel.setSortno(model.getSortno());
        tModel.setLineId(line.getId());
        if(StringUtils.isNotBlank(model.getLocationInfo())){
            String[] strs = model.getLocationInfo().split(",");
            tModel.setLongitude(getDecimalByVal(strs[0]));//经度
            tModel.setLatitude(strs.length>1?getDecimalByVal(strs[1]):null);//纬度
        }
        if(tModel.getLatitude() == null || tModel.getLongitude() ==null){
            //非成对出现，无效经纬度不维护
            tModel.setLongitude(null);
            tModel.setLatitude(null);
        }
        tModel.setEditDate(new Date());
        tModel.setEditor(loginUserInfo.getId());
        tModel.setIsdeleted(Constants.ZERO);
        return tModel;
    }

    private BigDecimal getDecimalByVal(String val) {
        try {
            return new BigDecimal(val);
        }catch (Exception e){

        }
        return null;
    }

    private Company findCompanyFromList(String companyName, List<Company> companyList) {
        if(companyList !=null){
            for(Company company : companyList){
                if(StringUtils.equals(companyName,company.getCompanyNamePath())){
                    return  company;
                }
            }
        }
        return null;
    }
    private JkCustomer findModelFromList(String code, List<JkCustomer> list) {
        if(list !=null){
            for(JkCustomer model : list){
                if(StringUtils.equals(code,model.getCode())){
                    return  model;
                }
            }
        }
        return null;
    }
    private JkLine findLineFromListByName(String name, List<JkLine> list) {
        if(list !=null){
            for(JkLine model : list){
                if(StringUtils.equals(name,model.getName())){
                    return model;
                }
            }
        }
        return null;
    }

}