I would like to make some query where my predicate is like this:
CriteriaBuilder criteriaBuilder = getEntityManager().getCriteriaBuilder();
CriteriaQuery<ProviderService> criteriaQuery = criteriaBuilder.createQuery(ProviderService.class);
// FROM
Root<ProviderService> providerService = criteriaQuery.from(ProviderService.class);
// SELECT
criteriaQuery.select(providerService);
// WHERE'S PREDICATE
List<Predicate> predicates = new ArrayList<>();
if(providers != null && providers.size() > 0) {
predicates.add(providerService.get(ProviderService_.provider).in(providers));
}
criteriaQuery.where(predicates.toArray(new Predicate[] { }));
TypedQuery<ProviderService> query = getEntityManager().createQuery(criteriaQuery);
return query.getResultList();
I check search for provider offers (ProviderService) that are supplied by any provider form collection (List) of providers.
I have received exception something like this:
Caused by: java.lang.IllegalArgumentException: Unaware how to convert value [pl.salonea.entities.Provider#85eab3b6 : pl.salonea.entities.Provider] to requested type [java.lang.Long]
at org.hibernate.jpa.criteria.ValueHandlerFactory.unknownConversion(ValueHandlerFactory.java:258)
at org.hibernate.jpa.criteria.ValueHandlerFactory.access$000(ValueHandlerFactory.java:34)
at org.hibernate.jpa.criteria.ValueHandlerFactory$LongValueHandler.convert(ValueHandlerFactory.java:152)
at org.hibernate.jpa.criteria.ValueHandlerFactory$LongValueHandler.convert(ValueHandlerFactory.java:139)
at org.hibernate.jpa.criteria.predicate.InPredicate.<init>(InPredicate.java:130)
at org.hibernate.jpa.criteria.predicate.InPredicate.<init>(InPredicate.java:108)
at org.hibernate.jpa.criteria.CriteriaBuilderImpl.in(CriteriaBuilderImpl.java:529)
at org.hibernate.jpa.criteria.expression.ExpressionImpl.in(ExpressionImpl.java:79)
EDITED:
I think it could have something to do with ProviderService composite Id that consists of (Provider, Service) and is defined as follows:
#Id
#NotNull
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "provider_id", referencedColumnName = "provider_id", nullable = false, columnDefinition = "BIGINT UNSIGNED")
public Provider getProvider() {
return provider;
}
public void setProvider(Provider provider) {
this.provider = provider;
}
#Id
#NotNull
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "service_id", referencedColumnName = "service_id", nullable = false, columnDefinition = "INT UNSIGNED")
public Service getService() {
return service;
}
public void setService(Service service) {
this.service = service;
}
And have proper IdClass as below:
public class ProviderServiceId implements Serializable {
private Long provider;
private Integer service;
/* constructors */
public ProviderServiceId() { }
public ProviderServiceId(Long providerId, Integer serviceId) {
this.provider = providerId;
this.service = serviceId;
}
// etc.
OR maybe there isn't such possibilities to compare entity attribute against list of possible values of that attribute (list of entities)
Suggested joining seems to work correctly:
// inner joining
if(provider == null) provider = providerService.join(ProviderService_.provider);
predicates.add(provider.in(providers));
I think that searching by passing list of Provider IDs rather than Provider entities will also work but haven't checked it.
Related
Spring version: 5.3.19
Hibernate: 5.4.24.Final
The problem: When trying to get the List compartments from class CriticalFlight after ScrollableData gets Cleaned up #Cleanup, the list is empty since fetch was never executed.
Custom class ScrollableData execution snipped code:
List<ENTITY> filteredEntities;
#Cleanup ScrollableData<ENTITY> scrollableData =
getScrollableData(
filter,
myMarketChecker,
additionalFilters,
staticPredicateBuilders);
filteredEntities = scrollableData.getAll();
return filteredEntities;
I loop into the list returned and try to access List compartments
then got: "org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.pros.travel.services.oandd.optimizer.alerts.entity.CriticalFlight.compartments, could not initialize proxy - no Session
"
Classes
Embeddable Class: CriticalFlightKey
#Data
#Embeddable
public class CriticalFlightKey implements Serializable
{
#DTOMapping(CriticalFlightDTO.FIELD_FLIGHTDATE)
#Convert(converter = DateToLocalDateAttributeConverter.class)
#Column(name = "FLTDATE", nullable = false)
private LocalDate flightDate;
#DTOMapping(CriticalFlightDTO.FIELD_DIM_CRRCODE)
#Column(name = "CRRCODE", nullable = false)
private String carrierCode;
#DTOMapping(CriticalFlightDTO.FIELD_DIM_FLTNUM)
#Column(name = "FLTNUM", nullable = false)
private String flightNumber;
#DTOMapping(CriticalFlightDTO.FIELD_DIM_ORGN)
#Column(name = "ORGN", nullable = false)
private String origin;
#DTOMapping(CriticalFlightDTO.FIELD_DIM_DSTN)
#Column(name = "DSTN", nullable = false)
private String destination;
}
Parent Class: CriticalFlight
#Data
#EqualsAndHashCode(of = {"id"})
#Entity
#Table(name = "OD_CRITICAL_FLIGHTS")
public class CriticalFlight implements
{
#JsonUnwrapped
#EmbeddedId
#DTOMapped
public CriticalFlightKey id;
...
....
#JsonManagedReference
#OneToMany(fetch = FetchType.EAGER)
#Fetch(FetchMode.SUBSELECT)
#JoinColumns({
#JoinColumn(name="FLTDATE", referencedColumnName="FLTDATE"),
#JoinColumn(name="CRRCODE", referencedColumnName="CRRCODE"),
#JoinColumn(name="FLTNUM", referencedColumnName="FLTNUM"),
#JoinColumn(name="ORGN", referencedColumnName="ORGN"),
#JoinColumn(name="DSTN", referencedColumnName="DSTN")
})
private List<CriticalFlightCmp> compartments = new ArrayList<>();
}
Embeddable class for child: CriticalFlightCmpKey
#Data
#Embeddable
public class CriticalFlightCmpKey implements Serializable
{
#Convert(converter = DateToLocalDateAttributeConverter.class)
#Column(name = "FLTDATE", nullable = false)
private LocalDate flightDate;
#Column(name = "CRRCODE", nullable = false)
private String carrierCode;
#Column(name = "FLTNUM", nullable = false)
private String flightNumber;
#Column(name = "ORGN", nullable = false)
private String origin;
#Column(name = "DSTN", nullable = false)
private String destination;
#Column(name = "CMPCODE", nullable = false)
private String cmpCode;
}
Child Class: CriticalFlightCmp
#Data
#EqualsAndHashCode(of = {"id"})
#Entity
#Table(name = "OD_CRITICAL_FLIGHTS_CMP")
public class CriticalFlightCmp implements IPersistable<CriticalFlightCmpKey>
{
#EmbeddedId
private CriticalFlightCmpKey id;
..
...
}
Custom class ScrollableData which uses org.hibernate.ScrollableResults to execute the query
#Slf4j
public class ScrollableData<ENTITY extends IPersistable> implements Closeable
{
private static final int SCROLLABLE_FETCH_SIZE = 10000;
private final Class<ENTITY> entityClass;
private final ScrollableResults results;
private final EntityManager entityManager;
private final List<IScrollableFilter<ENTITY>> filters = new ArrayList<>();
public ScrollableData(
Class<ENTITY> entityClass,
ScrollableResults results,
EntityManager entityManager)
{
this.entityClass = entityClass;
this.results = results;
this.entityManager = entityManager;
}
/**
* Create scrollable data from a query and entity manager session.
*
* #param entityManager Entity manager from which the query was built from.
* #param query Query to scroll on.
* #return Scrollable data
*/
static <ENTITY extends IPersistable> ScrollableData<ENTITY> fromQuery(
Class<ENTITY> entityClass,
EntityManager entityManager,
CriteriaQuery query)
{
ScrollableResults results = entityManager.createQuery(query)
.unwrap(Query.class)
.setReadOnly(true)
.setFetchSize(SCROLLABLE_FETCH_SIZE)
.setCacheable(false)
.scroll(ScrollMode.FORWARD_ONLY);
return new ScrollableData<>(entityClass, results, entityManager);
}
public List<ENTITY> getAll()
{
List<ENTITY> allEntities = new ArrayList<>();
while (next())
{
allEntities.add(get());
}
return allEntities;
}
/**
* Clears the hibernate session of any entities it's caching.
*/
public void clearSession()
{
log.debug("Clearing Session for {}", entityClass.getSimpleName());
Session hibernateSession = entityManager.unwrap(Session.class);
hibernateSession.clear();
}
/**
* Closes the scrollable results and the session contained in the entity manager.
*/
public void close()
{
clearSession();
if (results != null)
{
log.debug("Closing ScrollableResults for {}",
entityClass.getSimpleName());
results.close();
}
if (entityManager != null)
{
log.debug("Clearing EntityManager for {}", entityClass.getSimpleName());
entityManager.close();
}
}
}
On my MySql project I got this particular model with 3 entities: Prodotto with many childs QuotaIngrediente, that in turn is Many-to-One child of Ingrediente too. All my relationships are bi-directional.
All of them got an autogenerated integer Id and other fields removed to focus on the interesting ones.
#Entity
public class Prodotto {
private List<QuotaIngrediente> listaQuoteIng = new ArrayList<QuotaIngrediente>();
#OneToMany(mappedBy = "prodotto", cascade = CascadeType.ALL, orphanRemoval = true)
public List<QuotaIngrediente> getListaQuoteIng() {
return listaQuoteIng;
}
#Entity
public class QuotaIngrediente{
private Prodotto prodotto;
private Ingrediente ing;
private Double perc_ing;
#ManyToOne
#JoinColumn(name = "prodotto")
public Prodotto getProdotto() {
return prodotto;
}
#ManyToOne
#JoinColumn(name = "ing")
public Ingrediente getIng() {
return ing;
}
#Entity
public class Ingrediente {
private Set<QuotaIngrediente> quoteIng = new HashSet<QuotaIngrediente>();
#OneToMany(mappedBy = "ing", cascade = CascadeType.ALL, orphanRemoval = true)
public Set<QuotaIngrediente> getQuoteIng() {
return quoteIng;
}
I'm using SpringData Specification and I can build a query to get Prodotto based on Ingrediente criteria, this way:
public static Specification<Prodotto> getProdottoByIngSpec (String ing) {
if (ing != null) {
return (root, query, criteriaBuilder) -> {
query.groupBy(root.get(Prodotto_.id));
return criteriaBuilder.like(((root.join(Prodotto_.listaQuoteIng))
.join(QuotaIngrediente_.ing))
.get(Ingrediente_.nome), "%"+ing+"%");
};
It works as expected, but now I want to sort it by the QuotaIngrediente perc_ing field OF THAT SPECIFIC INGREDIENTE.
Obviously I'm asking how to do it on DB, not in business logic.
I was struggling with a false problem due to a wrong assumption of mine. Solution was the simplest. Just sort by orderBy CriteriaQuery method. The query I used to search already filtered the QuotaIngrediente returning just the lines that match my search criteria. Then this is the only line I had to add to my Specification:
query.orderBy(builder.desc((root.join(Prodotto_.listaQuoteIng))
.get(QuotaIngrediente_.perc_ing)));
I have written my custom RevisionEntity class to store additional data (for example username), like below:
#Entity
#RevisionEntity(AuditListener.class)
#Table(name = "REVINFO", schema = "history")
#AttributeOverrides({
#AttributeOverride(name = "timestamp", column = #Column(name = "REVTSTMP")),
#AttributeOverride(name = "id", column = #Column(name = "REV")) })
public class AuditEntity extends DefaultRevisionEntity {
private static final long serialVersionUID = -6578236495291540666L;
#Column(name = "USER_ID", nullable = false)
private Long userId;
#Column(name = "USER_NAME")
private String username;
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
I can see that all rows in database are correctly stored, REVINFO table contains also username.
I would like to query database to get detailed information from my custom RevisionEntity, like username.
How can I do it? Is there any supported API to get it?
Lets assume you know the identifier of the entity you're interested in the revision entity metadata for, you can easily query that information using the following approach:
final AuditReader auditReader = AuditReaderFactory.get( session );
List<?> results = auditReader.createQuery()
.forRevisionsOfEntity( YourEntityClass.class, false, false )
.add( AuditEntity.id().eq( yourEntityClassId ) )
.getResultList();
The returned results will contain an Object array, e.g. Object[] where results[1] will hold the revision entity instance which contains the pertinent information your wanting.
For more details, you can see the java documentation comments here
If you only have the revision number, you can access just the revision entity instance directly by:
// I use YourAuditEntity here because AuditEntity is actually an Envers class
YourAuditEntity auditEntity = auditReader
.findRevision( YourAuditEntity.class, revisionId );
For more details on the AuditReader interface, you can see the java documentation here
I have the following repository method that works exactly the way I need it to iff the user provides a sort column in the page parameter:
public interface IdentityRepository extends JpaRepository<Identity, String> {
#Query("select distinct ident from Identity ident left outer join ident.authorities authority "
+ "where ("
+ "(:src is null or ident.source = :src) and "
+ "(:org is null or ident.organization = :org) and "
+ "(:auth is null or authority.authority = :auth) and "
+ "(:authSrc is null or authority.authoritySource = :authSrc))")
#RestResource(path="filter")
public Page<Identity> findWithFilter(
#Param("src") String source,
#Param("org") String org,
#Param("auth") Authority auth,
#Param("authSrc") AuthoritySource authSrc,
Pageable page);
...
}
If the caller provides a page count, but not a sort column, they will get back the correct number of results when retrieving all the pages. However, many of the entities will be duplicated, so even though the result count is correct, many expected entities are missing and others are duplicated (or triplicated).
What I'm wondering is if there is a way to provide a default sort column and direction if the user does not specify one. I've learned that #EnableSpringDataWebSupport can help here, but we're not using Spring MVC, so I don't have any controllers to attach the #SortDefaults to. We are using Spring Data Rest though. Also, I've tried changing the method name to findWithFilterOrderByIdAsc, but that did not seem to help. Ran across this issue in the Spring JIRA, which I believe is exactly what I need, but until it's resolved, does anyone know of a work around?
Here's my entity...
#Entity
#Table(name = "identity", indexes = { #Index(columnList = "user_id", unique = true) })
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
#Audited
public class Identity implements Serializable, Identifiable<String> {
/**
* The unique identifier for this identity within the IDD application.
*/
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "IDDUidGenerator")
#GenericGenerator(name = "IDDUidGenerator")
private String id;
/**
* The name of the identity provider wherein this identity is originally defined.
*/
#Column(name = "source")
private String source = INTERNAL_SOURCE;
/**
* The unique identifier for this identity within the customer's identity provider.
*/
#NotNull
#Column(name = "user_id", nullable = false, unique = true)
private String userId;
/**
* The roles this identity is authorized to perform.
*/
#OneToMany(fetch = FetchType.EAGER, mappedBy = "identity", cascade = CascadeType.ALL, orphanRemoval = true)
private Set<IdentityAuthority> authorities = new HashSet<>();
...
}
And its sub-entity...
#Entity
#Table(name = "identity_authority")
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
#Audited
public class IdentityAuthority implements Serializable, Identifiable<Long> {
private static final long serialVersionUID = -5315412946768343445L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#XmlTransient
#JsonIgnore
private Long id;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "identity_id", nullable = false)
#XmlTransient
#JsonIgnore
private Identity identity;
#Enumerated(EnumType.STRING)
#Column(name = "authority", length = 20, nullable = false)
private Authority authority;
#Enumerated(EnumType.STRING)
#Column(name = "authority_source", length = 30, nullable = false)
private AuthoritySource authoritySource;
...
}
Here's the test case I ran to demonstrate the problem...
#Test
public void testPagedRequestsReturnAllResults() {
// Create identities
String source = "One Hundred Identities Generator";
int numIdentities = 100;
int pageSize = 5;
List<Identity> input = new ArrayList<>();
for (int i=0; i<numIdentities; i++) {
Identity identity = new Identity();
identity.setUserId(UUID.randomUUID().toString());
identity.setSource(source);
input.add(identity);
}
// Save identities
List<Identity> output = repository.saveBulk(input);
Set<String> savedIds = collectIds(output, null);
assertThat(savedIds.size()).isEqualTo(numIdentities);
// Test Sorted Find Filter with Paging (THIS PASSES)
Pageable pageRequest = new PageRequest(0, pageSize, new Sort(Direction.ASC, "id"));
Set<String> foundPagedIds = new HashSet<>();
do {
Page<Identity> page = repository.findOrderByIdAsc(source, null, null, null, pageRequest);
List<Identity> foundIdentities = page.getContent();
foundPagedIds = collectIds(foundIdentities, foundPagedIds);
pageRequest = page.nextPageable();
} while (pageRequest != null);
assertThat(foundPagedIds.size()).isEqualTo(numIdentities);
assertThat(foundPagedIds).isEqualTo(savedIds);
// Test Unsorted Find Filter with Paging (THIS FAILS)
pageRequest = new PageRequest(0, pageSize);
foundPagedIds = new HashSet<>();
do {
Page<Identity> page = repository.findOrderByIdAsc(source, null, null, null, pageRequest);
List<Identity> foundIdentities = page.getContent();
foundPagedIds = collectIds(foundIdentities, foundPagedIds);
pageRequest = page.nextPageable();
} while (pageRequest != null);
assertThat(foundPagedIds.size()).isEqualTo(numIdentities);
assertThat(foundPagedIds).isEqualTo(savedIds);
}
I have an Entity that maps to a table defined this way:
#Entity
#Table(name = "cmmn_calendar_evnt")
public class CommonCalendarEvent implements java.io.Serializable
{
private Integer cevId;
private Set<CommonCalendarEventPart> commonCalendarEventParts = new HashSet<CommonCalendarEventPart>(0)
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "CEV_ID", unique = true, nullable = false)
public Integer getCevId()
{
return this.cevId;
}
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "commonCalendarEvent")
public Set<CommonCalendarEventPart> getCommonCalendarEventParts()
{
return this.commonCalendarEventParts;
}
}
and CommonCalendarEventPart is defined like this:
#Entity
#Table(name = "cmmn_calendar_evnt_part")
public class CommonCalendarEventPart implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
private Integer ceeId;
private CommonCalendarEvent commonCalendarEvent;
private PartParticipant partParticipant;
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "CEE_ID", unique = true, nullable = false)
public Integer getCeeId()
{
return this.ceeId;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "CEE_CEV_ID", nullable = false)
public CommonCalendarEvent getCommonCalendarEvent()
{
return this.commonCalendarEvent;
}
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "CEE_PPT_ID", nullable = false)
public PartParticipant getPartParticipant()
{
return this.partParticipant;
}
}
and finally:
#Entity
#Table(name = "part_participant")
public class PartParticipant implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
private Integer pptId;
#Id
#GeneratedValue(strategy = IDENTITY)
#Column(name = "PPT_ID", unique = true, nullable = false)
public Integer getPptId()
{
return this.pptId;
}
}
I want to use the CriteriaBuilder to generate a query finding all CommonCalendarEvent for a specific Participant ID.
In Hql it would look something like this: (although I have not confirmed that this Hql is correct either)
"from commonCalendarEvent cce where :pptId in (cce.commonCalendarEventParts.partParticipant.pptId)"
I've tried some approaches of what I thought were intuitive attempts at writing a criteriaBuilder approach, but my attempts have resulted in errors ranging from:
“unexpected end of subtree” to just implementation errors.
.....
CriteriaBuilder builder = getEntityManager().getCriteriaBuilder();
CriteriaQuery<CommonCalendarEvent> criteria = builder.createQuery(CommonCalendarEvent.class);
Root<CommonCalendarEvent> root = criteria.from(CommonCalendarEvent.class);
Fetch<CommonCalendarEvent, CommonCalendarEventPart> evf = root.fetch(CommonCalendarEvent_.commonCalendarEventParts, JoinType.LEFT);
Join<CommonCalendarEvent, CommonCalendarEventPart> evj = (Join<CommonCalendarEvent, CommonCalendarEventPart>) evf;
Join<CommonCalendarEventPart, PartParticipant> evpj = evj.join(CommonCalendarEventPart_.partParticipant);
List<Predicate> pred = new ArrayList<Predicate>();
pred.add(builder.equal(evpj.get(PartParticipant_.pptId), pptId));
criteria.where(builder.and(pred.toArray(new Predicate[] {})));
return getEntityManager().createQuery(criteria).getResultList();
.............
above yields an "unexpected end of subtree" error.
Any Help is appreciated.
+1 for using Lazy initialization. The JPA model is Object, or Entity oriented, so you need to get used to thinking in those terms. A PartParticipant is not identified by its id in JPA, but by the object itself. Assuming you have a list of participants:
PartParticipant pp = em.find(PartParticipant.class, 2);
List<PartParticipant> pps = new ArrayList<PartParticipant>();
pps.add(pp);
Then you pass that list to the queries. In JPQL:
TypedQuery<CommonCalendarEvent> cev = em.createQuery("select cev from CommonCalendarEvent cev join fetch cev.commonCalendarEventParts cce where cce.partParticipant in :pps", CommonCalendarEvent.class);
List<CommonCalendarEvent> cevs = cev.setParameter("pps", pps).getResultList();
Notice the fetch is needed to prevent LazyInitializationExceptions.
Knowing the JPQL, the CriteriaQuery should follow pretty much the same:
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<CommonCalendarEvent> q = cb.createQuery(CommonCalendarEvent.class);
Root<CommonCalendarEvent> r = q.from(CommonCalendarEvent.class);
Join<CommonCalendarEvent, CommonCalendarEventPart> j = r.join("commonCalendarEventParts");
r.fetch("commonCalendarEventParts");
q.select(r).where(j.get("partParticipant").in(pps));
List<CommonCalendarEvent> rs = em.createQuery(q).getResultList();
You don't need to do anything special with the fetch other than execute it. As you can see, the query uses the PartParticipant Id.
select
commoncale0_.CEV_ID as CEV_ID1_0_0_,
commoncale1_.CEE_ID as CEE_ID1_1_1_,
commoncale1_.CEE_CEV_ID as CEE_CEV_2_1_1_,
commoncale1_.CEE_PPT_ID as CEE_PPT_3_1_1_,
commoncale1_.CEE_CEV_ID as CEE_CEV_2_0_0__,
commoncale1_.CEE_ID as CEE_ID1_1_0__
from cmmn_calendar_evnt commoncale0_
inner join cmmn_calendar_evnt_part commoncale1_ on commoncale0_.CEV_ID=commoncale1_.CEE_CEV_ID
where commoncale1_.CEE_PPT_ID in (?)
Fetch<CommonCalendarEvent, CommonCalendarEventPart> evf is not necessary, and the first join statement should be corrected:
Join<CommonCalendarEvent, CommonCalendarEventPart> evj =
root.join(CommonCalendarEvent_.commonCalendarEventParts);
The rest of the query seems correct.