About IdClass

manual

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 ...

 
api-jpa

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 ...

 
api-jpa

javax.persistence.IdClass

Specifies a composite primary key class that is mapped to multiple fields or properties of the entity.(Annotation of JPA)

 
forum_thread

EmbeddedId with Generated field value

@Entity public class A { @EmbeddedId private Id id; } @Embeddable public class Id { @Generated private long id; private String zone; } How can I get the field Id.id auto-incremented?   ... Solution 1 ********* @ Entity @ IdClass ( CompositePK. class ) public class A ... classes). Consider using: @ IdClass ( ZoneId. class ) @ Entity public ...

 
forum_thread

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 ; ...

 
forum_thread

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 ...

 
issue

ObjectDb Doctor : Failed to locate set method for field property com.test.Video$VideoId.sourceId using reflection (error 316)

Hello everyone ! I have just launched the ObjectDb Doctor for testing purposes. But while inspecting my base, the Doctor throws me a strange error : [ObjectDB 2.4.6] Invalid ID class com.test.Video$VideoId for type com.test.Video (Failed to locate set method for field property com.test.Video$VideoId.sourceId using reflection) (error 316) It seems that the Doctor can't find the SourceId, that is a part of my primary key. There is a description of my Video bean :   ... ( name = "Video" ) @ IdClass ( Video. VideoId . class ) public class ...

 
forum_thread

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 ...

 
api-jpa

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)

 
api-jpa

hasSingleIdAttribute()

Whether the identifiable type has a single id attribute.(Method of javax.persistence.metamodel.IdentifiableType)