eclipselink

问题 We have an entity Role which could be either users or groups. In the groups we have set permissions. Therefore a user belongs to a group. Additionally groups can belong to other groups, i.e. one could make a hierarchy of permissions. The idea is to store the relations from e.g. user -> group into a separate db table role_ref . @Table(name = "role__parent") @IdClass(RoleAssociationKey.class) @Data public class RoleAssociation implements Serializable { @Id @JoinColumn(name = "has_parent_role_id

问题 I am a beginner of eclipselink and persistence, i am using @EmbeddedId like this with javafx properties.... @Entity public class Inwards implements Serializable{ Destination id; StringProperty orderName; IntegerProperty orderNo; ObjectProperty<LocalDate> orderDate; BooleanProperty save; public Inwards(){ this.orderName = new SimpleStringProperty(); this.orderNo = new SimpleIntegerProperty(); this.orderDate = new SimpleObjectProperty<LocalDate>(LocalDate.of(2015, Month.MARCH, 5)); this.save =

问题 I get the following error when i try to deploy my application on glassfish 4.1: [class com.sample.model.Profile] uses a non-entity [class com.sample.model.ProfileEventMapping] as target entity in the relationship attribute [field events]. The tables for both entities are getting created in the database. Profile: @Entity public class Profile ... @OneToMany(mappedBy = "profile", orphanRemoval = true) private Set<ProfileEventMapping> events = new HashSet<>(); ProfileEventMapping: @Entity public

问题 I get the following error when i try to deploy my application on glassfish 4.1: [class com.sample.model.Profile] uses a non-entity [class com.sample.model.ProfileEventMapping] as target entity in the relationship attribute [field events]. The tables for both entities are getting created in the database. Profile: @Entity public class Profile ... @OneToMany(mappedBy = "profile", orphanRemoval = true) private Set<ProfileEventMapping> events = new HashSet<>(); ProfileEventMapping: @Entity public

问题 I get the following error when i try to deploy my application on glassfish 4.1: [class com.sample.model.Profile] uses a non-entity [class com.sample.model.ProfileEventMapping] as target entity in the relationship attribute [field events]. The tables for both entities are getting created in the database. Profile: @Entity public class Profile ... @OneToMany(mappedBy = "profile", orphanRemoval = true) private Set<ProfileEventMapping> events = new HashSet<>(); ProfileEventMapping: @Entity public

问题 I get the following error when i try to deploy my application on glassfish 4.1: [class com.sample.model.Profile] uses a non-entity [class com.sample.model.ProfileEventMapping] as target entity in the relationship attribute [field events]. The tables for both entities are getting created in the database. Profile: @Entity public class Profile ... @OneToMany(mappedBy = "profile", orphanRemoval = true) private Set<ProfileEventMapping> events = new HashSet<>(); ProfileEventMapping: @Entity public

问题 My Solution consists of 3 different projects: EJB project with Netbeans auto-generated Facades to manage Entity classes and the persistence.xml Class-Library that holds all @Entity annotated and statically weaved database classes and the remote interfaces for the facade ejb's (shared between EJB and stand-alone client) Stand-alone Client that consists mainly of Swing GUI classes I use Glassfish 3.1.2, Eclipselink 2.3 as JPA-provider, Netbeans 7.1.1 and a MySQL database. I configured an Ant

问题 My Solution consists of 3 different projects: EJB project with Netbeans auto-generated Facades to manage Entity classes and the persistence.xml Class-Library that holds all @Entity annotated and statically weaved database classes and the remote interfaces for the facade ejb's (shared between EJB and stand-alone client) Stand-alone Client that consists mainly of Swing GUI classes I use Glassfish 3.1.2, Eclipselink 2.3 as JPA-provider, Netbeans 7.1.1 and a MySQL database. I configured an Ant

问题 I have two entities: class A { @OneToMany(mappedBy = "a") List<B> bs; // getter/ setter } class B { @ManyToOne A a; // getter/ setter } To delete one b, I first need to invalidate that relationship. "Traditionally" I would do something like that: A a = em.getReference(A.class, entityIdA) B b = em.getReference(B.class, entityIdB); a.getBs().remove(b); b.setA(null); em.remove(b); This is not very performant, if the List of a 's is getting large (a few hundreds in my case). I know I can also use

问题 I have two entities: class A { @OneToMany(mappedBy = "a") List<B> bs; // getter/ setter } class B { @ManyToOne A a; // getter/ setter } To delete one b, I first need to invalidate that relationship. "Traditionally" I would do something like that: A a = em.getReference(A.class, entityIdA) B b = em.getReference(B.class, entityIdB); a.getBs().remove(b); b.setA(null); em.remove(b); This is not very performant, if the List of a 's is getting large (a few hundreds in my case). I know I can also use