About IdClass
JPA Primary Key
Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... is an entity. See JavaDoc Reference Page... @IdClass javax.persistence.IdClass JPA annotation Specifies a composite primary key class that ...
JPA Annotations for Classes
Reference (JavaDoc) of JPA 2 class annotations, including @Entity, @Embeddable, @IdClass, @Cacheable, @EntityListeners, etc.... JPA 2 class annotations, including @Entity, @Embeddable, @IdClass, @Cacheable, @EntityListeners, etc. See JavaDoc Reference Page... ... defines an ID class: javax.persistence.IdClass ID classes are useful in representing composite primary ...
javax.persistence.IdClass
Specifies a composite primary key class that is mapped to multiple fields or properties of the entity.(Annotation of JPA)
Conflicting modifiers .... (javax.persistence.Id, javax.persistence.ManyToOne)
I have two classes a Container type class and another class that is 'contained' by that class. The contained class, CompoundKeyMapItem, represents an alternate implementation of an object held in a Map, and uses a Compound Primary Key. The contained class therefore uses an @IdClass. This all works fine on Eclipselink. However when I try and run this in ObjectDb I get the following error; ... Primary Key. The contained class therefore uses an @IdClass. This all works fine on Eclipselink. However when I try and run ... . Id ; import javax. persistence . IdClass ; import javax. persistence . ManyToOne ; ...
Object explorer cannot open odb file. ObjectDB many-to-many relationship
I created a data model to test many-to-many relationship with a link table as following (full code in attachement) ... ; } @ Entity @ IdClass ( Assignement. PK . class ) public class ...
ODB with Netbeans
ODB2 allows JPA attributes to be public (which is great), but JPA does not. So, in Netbeans, with attributes like this: @Entity class A { public String name; } I get compile time errors "Instance variable for persistent attribute must not be public" How does one switch that off in Netbeans? ... restriction, not a JPA restriction. "An entity or IdClass class should implement the java.io.Serializable interface." This is ...
MapKey.name
(Optional) The name of the persistent field or property of the associated entity that is used as the map key.(Annotation Element of javax.persistence.MapKey)
javax.persistence.MapKey
Specifies the map key for associations of type java.util.Map when the map key is itself the primary key or a persistent field or property of the entity that is the value of the map.(Annotation of JPA)
hasSingleIdAttribute()
Whether the identifiable type has a single id attribute.(Method of javax.persistence.metamodel.IdentifiableType)
javax.persistence.metamodel.IdentifiableType
Instances of the type IdentifiableType represent entity or mapped superclass types.(Interface of JPA)
