Я использую критерии jhipster и спецификацию jpa для реализации конечной точки для проведения исследования.
Хорошо, это работает, но продолжайте посылать мне дубликаты.
Есть prestations с этой моделью
public class Prestation extends AbstractAuditingEntity implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")
@SequenceGenerator(name = "sequenceGenerator")
private Long id;
@NotNull
@Column(name = "jhi_label", nullable = false)
private String label;
@Column(name = "description")
private String description;
@Column(name = "unit")
private String unit;
@NotNull
@Column(name = "activated", nullable = false)
private boolean activated;
@ManyToOne(optional = false)
@NotNull
@JsonIgnoreProperties("prestations")
private SubCategory subCategory;
@OneToMany(mappedBy = "prestation", cascade = CascadeType.ALL, orphanRemoval = true)
private List<CompanyPrestation> companies = new ArrayList<>();
И связь между компанией и станциями
@OneToMany(mappedBy = "company", cascade = CascadeType.ALL, orphanRemoval = true)
@LazyCollection(LazyCollectionOption.FALSE)
private List<CompanyPrestation> prestations = new ArrayList<>();
А вот класс CompanySpecification, который я использовал для создания спецификации, которую я даю хранилищу
public class CompanySpecification extends QueryService<Company> implements Specification<Company> {
private static final long serialVersionUID = 1L;
private CompanyCriteria criteria;
public CompanySpecification(CompanyCriteria criteria) {
this.criteria = criteria;
}
@Override
public Predicate toPredicate(Root<Company> roots, CriteriaQuery<?> query, CriteriaBuilder builder) {
Specification<Company> specification = Specification.where(null);
if (criteria != null) {
if (criteria.getName() != null) {
specification = specification.or(buildStringSpecification(criteria.getName(), Company_.name));
}
if (criteria.getSiret() != null) {
specification = specification.or(buildStringSpecification(criteria.getSiret(), Company_.siret));
}
if (criteria.getCodeAPE() != null) {
specification = specification.or(buildStringSpecification(criteria.getCodeAPE(), Company_.codeAPE));
}
if (criteria.getLegalForm() != null) {
specification = specification.or(buildStringSpecification(criteria.getLegalForm(), Company_.legalForm));
}
if (criteria.getVille() != null) {
specification = specification
.and(buildReferringEntitySpecification(criteria.getVille(), Company_.address, Address_.ville));
}
if (criteria.getExercicePlace() != null && !criteria.getExercicePlace().getIn().isEmpty()) {
Filter<ExercicePlace> exercicePlaceFilter = new Filter<>();
exercicePlaceFilter.setIn(criteria.getExercicePlace().getIn().stream().map(ExercicePlace::valueOf)
.collect(Collectors.toList()));
specification = specification.and(buildSpecification(exercicePlaceFilter, Company_.exercicePlace));
}
if (criteria.getCodePostal() != null) {
specification = specification.and(buildReferringEntitySpecification(criteria.getCodePostal(),
Company_.address, Address_.codePostal));
}
if (criteria.getPrestationsId() != null) {
specification = specification.and(buildSpecification(criteria.getPrestationsId(),
root -> root.join(Company_.prestations, JoinType.LEFT)
.join(CompanyPrestation_.prestation, JoinType.LEFT).get(Prestation_.id)));
}
if (criteria.getCatId() != null) {
specification = specification.and(buildSpecification(criteria.getCatId(),
root -> root.join(Company_.prestations, JoinType.LEFT)
.join(CompanyPrestation_.prestation, JoinType.LEFT)
.join(Prestation_.subCategory, JoinType.LEFT).join(SubCategory_.category, JoinType.LEFT)
.get(Category_.id)));
}
if (criteria.getSubCatId() != null) {
specification = specification.and(buildSpecification(criteria.getSubCatId(),
root -> root.join(Company_.prestations, JoinType.LEFT)
.join(CompanyPrestation_.prestation, JoinType.LEFT)
.join(Prestation_.subCategory, JoinType.LEFT).get(SubCategory_.id)));
}
if (criteria.getPrestationName() != null) {
specification = specification.or(buildSpecification(criteria.getPrestationName(),
root -> root.join(Company_.prestations, JoinType.LEFT)
.join(CompanyPrestation_.prestation, JoinType.LEFT).get(Prestation_.label)));
}
if (criteria.getPriceMinimum() != null || criteria.getPriceMaximum() != null) {
specification = specification.and((lroot, lquery, lcriteriaBuilder) -> {
ListJoin<Company, CompanyPrestation> joinCompnayToCompanyPrestations = lroot
.join(Company_.prestations, JoinType.LEFT);
if (criteria.getPriceMinimum() != null && criteria.getPriceMaximum() != null) {
return lcriteriaBuilder.between(
joinCompnayToCompanyPrestations.get(CompanyPrestation_.pricePerUnit),
criteria.getPriceMinimum().getGreaterOrEqualThan(),
criteria.getPriceMaximum().getLessOrEqualThan()
);
} else if (criteria.getPriceMinimum() != null) {
return lcriteriaBuilder.greaterThanOrEqualTo(
joinCompnayToCompanyPrestations.get(CompanyPrestation_.pricePerUnit),
criteria.getPriceMinimum().getGreaterOrEqualThan());
} else {
return lcriteriaBuilder.lessThanOrEqualTo(
joinCompnayToCompanyPrestations.get(CompanyPrestation_.pricePerUnit),
criteria.getPriceMaximum().getLessOrEqualThan());
}
});
}
}
return specification.toPredicate(roots, query, builder);
}
Ивот мой сервисный метод, использующий его
@Transactional(readOnly = true)
public Page<CompanyDTO> findByCriteria(CompanyCriteria criteria, Pageable page) {
log.debug("find by criteria : {}, page: {}", criteria, page);
Specification<Company> spec = Specification.where(null);
CompanySpecification specification = new CompanySpecification(criteria);
spec = (Specification<Company>) specification;
Page<Company> vitrinesPage = companyRepository.findAll(spec, page);
List<CompanyDTO> list = companyMapper.toDto(vitrinesPage.getContent());
Page<CompanyDTO> listPage = new PageImpl<>(list, page, vitrinesPage.getTotalElements());
return listPage;
}
Я нашел отличный метод в CriteriaQuery, но я действительно не знаю, как добавить его в мою спецификацию.
Помогите, пожалуйста!