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Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne Class targetEntity (Optional) The entity class that is the target of the association. Defaults to the type of the field or property that stores the association. Default: void/class Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne CascadeType[] cascade (Optional) The operations that must be cascaded to the target of the association. By default no operations are cascaded. Default: {} Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne FetchType fetch (Optional) Whether the association should be lazily loaded or must be eagerly fetched. The EAGER strategy is a requirement on the persistence provider runtime that the associated entity must be eagerly fetched

Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne boolean optional (Optional) Whether the association is optional. If set to false then a non-null relationship must always exist. Default: true Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne String mappedBy (Optional) The field that owns the relationship. This element is only specified on the inverse (non-owning) side of the association. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence. OneToOne boolean orphanRemoval (Optional) Whether to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities. Default: false Since: Jakarta Persistence (JPA) 2.0

: @ OneToOne , @ManyToOne : For references to entity types. @OneToMany , @ManyToMany : For collections and maps ... EntityWithFieldSettings { @Basic ( optional =false) Integer field1; @ OneToOne ( cascade = CascadeType ... inverse fields are also supported: @Entity public class Employee { @ OneToOne MedicalInsurance

;          @ OneToOne (mappedBy = "other", cascade ... ;  private int counter;     @ OneToOne     private

, which can be a single entity or a collection of entities: @Entity class Employee { : @ OneToOne ( cascade ... a collection of entities: @Entity class Employee { : @ OneToOne ( cascade = CascadeType . MERGE ) private

through the field. Specifying FetchType . LAZY in either the @ OneToOne or @ManyToOne annotation excludes ... Employee { : @ OneToOne ( cascade = CascadeType . REFRESH ) private Address address; : } In

can reference multiple entities. @Entity class Employee { : @ OneToOne ( cascade = CascadeType . PERSIST

public Set getOrders() { return orders; } See Also: ManyToOne OneToMany OneToOne JoinTable ... . If the join is for a OneToOne or ManyToOne mapping using a foreign key mapping strategy, the foreign key ... entity. If the join is for a ManyToMany mapping or for a OneToOne or bidirectional ManyToOne

Jakarta Persistence (JPA) Annotation Type jakarta.persistence.MapsId Implemented Interfaces: Annotation Target: Method, Field Designates a ManyToOne or OneToOne relationship attribute that provides ... or OneToOne relationship declared by a dependent entity is annotated MapsId , an instance

. If the join is for a OneToOne or ManyToOne mapping using a foreign key mapping strategy, the foreign key ... . If the join is for a ManyToMany mapping or for a OneToOne or bidirectional ManyToOne / OneToMany

ManyToOne , OneToOne , ManyToMany , or OneToMany . See Also: JoinColumn JoinColumns Since: Jakarta

annotation. Alternatively, an optional OneToOne association is sometimes mapped to a join table

ManyToMany OneToMany ManyToOne OneToOne Since: Jakarta Persistence (JPA) 1.0 Enum Constants EAGER Data

public String objectName; @ OneToOne public ObjectType objectType; @Index public Integer state; public Map ... = new ArrayList (); @ OneToOne (fetch=FetchType.LAZY) public ObjectNode currentLocation; @ OneToOne ... ArrayList (); @ OneToOne (fetch=FetchType.LAZY) public ObjectNode linkedType; @OneToMany(fetch

) @ElementCollection private Map values = new HashMap (); @ OneToOne (fetch = FetchType.LAZY, cascade ... ; @ OneToOne (fetch = FetchType.EAGER) private TCStep step; //For performance reasons, we use a list ... (AccessType.FIELD) public class Values extends Identifiable { @ OneToOne (fetch = FetchType.EAGER) private

.REFRESH) private List comments = new ArrayList (); @ OneToOne (cascade = CascadeType.ALL) private SiteAuth ... ; @ OneToOne (cascade = {CascadeType.PERSIST}) private Image mainImage; @ OneToOne (cascade = {CascadeType

again :( ). Here is the test case : 1- Create 100 000 entities with for each 1 entity with @ OneToOne (mappedBy ... .persistence.Id; import javax.persistence. OneToOne ; @Entity public class MyEntity { @Id private String name ... = null;   @ OneToOne (targetEntity = MyEntityChild.class, cascade = CascadeType.ALL,mappedBy

to another entity and they both reciprocally do: EntityB:     @ OneToOne (cascade = CascadeType.ALL)     EntityA entityA;   EntityA:     @ OneToOne (cascade

It is possible to use lazy loading on fields of attached entities by several threads? Example: class EntityZ { @ OneToOne (fetch = FetchType.LAZY) EntityX fieldX; @ OneToOne (fetch = FetchType.LAZY) EntityY fieldY; @ElementCollection (fetch = FetchType.LAZY) List list; } We want to load the entity

; import javax.persistence.ManyToOne; import javax.persistence. OneToOne ; import javax.persistence.Table ... = GenerationType.AUTO) private Long id; private static final long serialVersionUID = 1L; @Index @ OneToOne

? #4. Are @Index field used also on relations? @ OneToOne , @ManyToOne? I don't want to start ... with and without such an index. 4. Are @Index field used also on relations? @ OneToOne , @ManyToOne

with @ OneToOne (fetch = FetchType.LAZY, cascade = CascadeType.ALL)     private LargeString description;     @ OneToOne (fetch = FetchType.LAZY, cascade = CascadeType.ALL)   

MyEntity1 {        @ OneToOne     private MyEntity2

Do the following annotations @OneToMany @ManyToOne @ManyToMany @ OneToOne imply @Index   ? Thanks, Carl   FastModel Ben Schreiber Actually these annotations (except @ManyToMany ) should apply @Unique on the @One side. But ObjectDB doesn't apply these indexes automatically

; import javax.persistence.Id; import javax.persistence. OneToOne ; import javax.persistence.Persistence

.class);   root.fetch("PersonData"); //@ OneToOne relationship   criteriaQuery.select(root

String mailAddress; @ OneToOne private Settings settings; private String phoneNumber; @OneToMany

() { return name; } } @Entity class MessageImpl { @ OneToOne private ModelElementImpl e; @Basic private

Hi, for cascading persist, I have 3 choices: - Either locally (@ OneToOne (cascade=CascadeType.PERSIST)) - Either at objectdb level ( ) - Either at JPA global level (orm.xml).   For defining fetch policy, I know the local way to do it (@ManyToOne(fetch=FetchType.LAZY)). Is there any way

.FIELD) @Column (name = "uid") private String uid; @ OneToOne (fetch = FetchType.EAGER, cascade

, cascade = CascadeType.ALL) @Column( name = "DATA_ITEMS" ) private List dataItems; @ OneToOne (fetch

I added a OneToOne Realtionship to one of my entity classes. To  give this field a value in my existing datasets i wrote an upgrade method. The cool thing is that SELECT u FROM Unit u WHERE u.lastPosition IS NOT NULL returns no datasets. Is this a bug or am i missing something? mosi0815 Ralph

loading in these cases. Regarding your example, ObjectDB can use lazy loading in OneToOne

static class AId {     @ OneToOne (cascade = CascadeType.PERSIST)    

= 6249921651146397564L; @ OneToOne (cascade=CascadeType.REFRESH, fetch=FetchType.EAGER) private TestEntity

{ @ OneToOne (fetch = FetchType.EAGER) private CacheableJobInfo ji; @ OneToOne (fetch = FetchType.EAGER) private ... . The problem dissapeared when removing the @ OneToOne (fetch = FetchType.EAGER) annotation. I am not

private String secondId; @ OneToOne (cascade=CascadeType.ALL) private HashMap myMap; } @Embeddable public class EmbeddableA { @ OneToOne (cascade=CascadeType.ALL) private HashMap myMap; } @Embeddable public class EmbeddableB { @ OneToOne (cascade=CascadeType.ALL) private HashMap myMap; } I'm am trying

follows: @Entity public class ObjectDbMessagePayload { @Id String id; @ OneToOne (orphanRemoval=true, cascade=CascadeType.ALL, fetch=FetchType.EAGER) private Object payload; @ OneToOne (orphanRemoval=true

= "uid") private String uid; @ OneToOne (fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH ... uid; @ OneToOne (fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private

simple @ OneToOne relationship fields that likewise become null: private List ownedElements = new ... my larger real-world application, lots of other @OneToMany and @ OneToOne fields are also null). In

extends PersistableObject {     @ OneToOne (mappedBy = "spouse")     private