Bard、一言、ChatGPT的水平-Toy模板网

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如何解读Specification.where

如何解读Spring boot jpa中Specification的如下方法：

static <T> Specification<T> where(@Nullable Specification<T> spec) {
  return spec == null ? (root, query, builder) -> null : spec;
}

有文字解释，这里只摘录代码部分。

Bard

Specification<User> spec1 = new Specification<User>() {
  @Override
  public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
    return builder.equal(root.get("name"), "John Doe");
  }
};

Specification<User> spec2 = new Specification<User>() {
  @Override
  public Predicate toPredicate(Root<User> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
    return builder.greaterThan(root.get("age"), 21);
  }
};
Specification<User> spec = Specification.where(spec1).where(spec2);
List<User> users = repository.findAll(spec);

这句Specification<User> spec = Specification.where(spec1).where(spec2);明显错误。

ChatGPT

Specification<Book> spec1 = (root, query, builder) -> builder.lessThanOrEqualTo(root.get(Book_.PRICE), 100);
Specification<Book> spec2 = (root, query, builder) -> builder.like(root.get(Book_.ISBN), "%64%");
Specification<Book> spec = spec1.and(spec2);

List<Book> books = bookRepository.findAll(spec);
books.forEach(b -> log.debug("{}{-}", b.getIsbn(), b.getPrice()));

文心一言

List<Person> people = new ArrayList<>();  
people.add(new Person("Alice", 25));  
people.add(new Person("Bob", 20));  
people.add(new Person("Charlie", 30));  
  
List<Person> filteredPeople = new ArrayList<>();  
  
Specification<Person> specification = Specification.where(builder -> builder.ge(Person::getAge, 18));  
  
filteredPeople.addAll(people.stream().filter(specification).collect(Collectors.toList()));