38 | General Performance Issues Illustrated with a Specific Method; import javax.persistence.ManyToOne; import javax.persistence.OneToOne; import javax.persistence.Table ... */ @ManyToOne(fetch = FetchType.LAZY) private WebUser createdBy; @Temporal(javax.persistence ... ) private Date createdOn; @ManyToOne(fetch = FetchType.LAZY) private Institution |
22 | JPA Entity Fields: OneToOne, ManyToOne - for references of entity types. OneToMany, ManyToMany - for collections and maps ... relationship: @Entity public class Employee { String name; @ManyToOne Department department |
22 | Retrieving JPA Entity Objects retrieval by using a lazy fetch type: @Entity class Employee { : @ManyToOne(fetch=FetchType ... specifying FetchType.LAZY in either @OneToOne or @ManyToOne annotations (currently ObjectDB does not |
11 | javax.persistence.JoinColumn itself is defaulted, a single join column is assumed and the default values apply. Example: @ManyToOne ... getOrders() {return orders;} Since: JPA 1.0 See Also: ManyToOne OneToMany OneToOne JoinTable ... . If the join is for a OneToOne or ManyToOne mapping using a foreign key mapping strategy, the foreign |
6 | javax.persistence.OneToMany getOrders() { return orders; } In Order class: @ManyToOne @JoinColumn(name="CUST_ID ... ; } // In Order class: @ManyToOne @JoinColumn(name="CUST_ID", nullable=false |
6 | javax.persistence.AssociationOverride Employee { ... @ManyToOne protected Address address ... contactInfo; ... } @Embeddable public class ContactInfo { @ManyToOne Address |
6 | JoinColumn.name ManyToOne mapping using a foreign key mapping strategy, the foreign key column is in the table ... is for a ManyToMany mapping or for a OneToOne or bidirectional ManyToOne/OneToMany mapping using a join table |
6 | JoinColumn.table of the applicable entity. Default: If the join is for a OneToOne or ManyToOne mapping using a foreign ... ManyToOne/OneToMany mapping using a join table, the name of the join table. If the join is for an element |
6 | javax.persistence.MapKey getEmpId() { ... } @ManyToOne @JoinColumn(name="dept_id") public Department ... { @Id public Integer getEmpId() { ... } ... @ManyToOne @JoinColumn(name |
6 | javax.persistence.MapsIdjavax.persistence Annotation MapsId Target: Fields (including property get methods) Designates a ManyToOne or OneToOne relationship attribute that provides the mapping for an EmbeddedId primary key ... ; ... @MapsId("empid") // maps the empid attribute of embedded id @ManyToOne |
