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Manual
98

JPA Persistable Types

, Mapped superclasses, Embeddable classes. Simple Java data types: Primitive types, Wrappers, String ... , OpenJPA, JPOX, DataNucleus, etc.). Embeddable Classes Embeddable classes are user defined persistable classes that function as value types. As with other non entity types, instances of an embeddable
JPA Doc
80

javax.persistence.Embeddable

javax.persistence Annotation Embeddable Target: Classes Defines a class whose instances are stored ... that the Transient annotation may be used to designate the non-persistent state of an embeddable class. Example 1: @Embeddable public class EmploymentPeriod { @Temporal(DATE) java.util
JPA Doc
80

embeddable(cls)

Method javax.persistence.metamodel.Metamodel EmbeddableType embeddable(   Class cls ) Return the metamodel embeddable type representing the embeddable class. Parameters: cls - the type of the represented embeddable class Returns: the metamodel embeddable type Throws: IllegalArgumentException - if not an embeddable class Since: JPA 2.0
JPA Doc
75

Type.PersistenceType.EMBEDDABLE

Enum Constant javax.persistence.metamodel.Type.PersistenceType EMBEDDABLE Embeddable class Since: JPA 2.0
JPA Doc
53

JPA Annotations for Classes

Reference (JavaDoc) of JPA 2 class annotations, including @Entity, @Embeddable, @IdClass, @Cacheable, @EntityListeners, etc.
Manual
35

JPA Metamodel API

to retrieve sets of types: // Get all the managed classes: // (entity classes, embeddable classes ... (); // Get all the embeddable classes: Set allEmbeddableTypes = metamodel.getEmbeddables ... instance: // Get a managed type (entity, embeddable or mapped super classes): ManagedType
Manual
35

JPA Primary Key

an embeddable class: @Entity public class Project { @EmbeddedId ProjectId id; : } @Embeddable Class ProjectId { int departmentId; long projectId; } The primary key fields are defined in an embeddable class. The entity contains a single primary key field that is annotated
Forum
26

Is it ok to put list or map of embeddable objects in entity ?

Hi, Is it ok to put list or map of embeddable objects in entity? I mean, for example : @Entity ...     Map cMap; (...) } where Class_B and Class_C are annotated as @Embeddable ? In the examples, there is only situation where there is one single instance of embeddable class in
Issue
26

probable error in text of manual about embeddable classes

at http://www.objectdb.com/java/jpa/entity/types website in "Embeddable Classes" section ... . The complete paragraph: "Instances of embeddable classes are always embedded in other entity ... . Therefore, using embeddable classes can save space in the database and improve efficiency. Embeddable
Forum
26

Unexpected internal exception during set field of an Embeddable to null

of SignalValueImpl objects (Embeddables). Partly as in the stack trace an Embeddable contain another Embeddable. It seems like that we can't reproduce the problem in smaller use cases with less objects ... implementation of SignalValueImpl import javax.persistence.Basic; import javax.persistence.Embeddable