1. MongoTemplate mongoTemplate = new MongoTemplate(new MongoClient(new MongoClientURI(mongoURI)), "news-archive");
2. Query query = new Query();
3.  
4. List<News> tempList = new ArrayList<>();
5.  
6. if(keyword != null) {
7.   String[] strings = keyword.toString().split(" ");
8.   for (int idx = 0; idx < strings.length; idx++) {
9.     List<News> now = this.newsRepository.findAllByNewsContainingOrTitleContaining(pageable, strings[idx]);
10.     tempList.addAll(now);
11.   }
12. }
13.  
14. if (category != null) {
15.   query.addCriteria(Criteria.where("category").regex(category.toString()));
16. }
17.  
18. if(date != null) {
19.   String dateString = date.toString().substring(0, date.toString().length()-1);
20.   LocalDateTime ldt = LocalDateTime.parse(dateString);
21.   LocalDateTime lower, upper;
22.   lower = LocalDateTime.of(ldt.getYear(), ldt.getMonth(), ldt.getDayOfMonth(), 0, 0, 0);
23.   upper = LocalDateTime.of(ldt.getYear(), ldt.getMonth(), ldt.getDayOfMonth(), 23, 59, 59);
24.   query.addCriteria(Criteria.where("date").gte(lower).lte(upper));
25. }
26.  
27. List<News> list = mongoTemplate.find(query, News.class);
28. List<News> finalList = new ArrayList<>();
29.  
30. if(tempList.size() > 0) {
31.   finalList.addAll(tempList);
32.   finalList.retainAll(list);
33. } else {
34.   finalList.addAll(list);
35. }
36.  
37. finalList = finalList.stream().distinct().collect(Collectors.toList());
38.  
39. return finalList;