About EmbeddedId
JPA Primary Key
Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... public class Project { @EmbeddedId javax.persistence.EmbeddedId JPA annotation Applied to a persistent field or property ...
Should derived fields of an EmbeddedId be manually maintained by app code?
If I have an Entity which has a primary key which is derived and I am implementing it using @EmbeddedId, am I responsible for maintaining the derived fields of the @EmbeddedId? I could not find anything in the JPA 2.0 spec http://download.oracle.com/auth/otn-pub/jcp/persistence-2.0-fr-oth-JSpec/persistence-2_0-final-spec.pdf?e=1317047713&h=54831c176e81a244a4c309e13eba0b27 which tells me what to expect. ... key which is derived and I am implementing it using @EmbeddedId, am I responsible for maintaining the derived fields of the @EmbeddedId? I could not find anything in the JPA 2.0 spec ... identified by their keys. The embeddedId for the item class, ECompoundKeyMapItemId, contains a field, "cont", ...
JPA Annotations for Fields
Reference (JavaDoc) of JPA 2 field annotations, including @Basic, @Embedded, @EmbeddedId, @Version, @Transient, @Enumerated, @MapKeyEnumerated, @Temporal and @MapKeyTemporal.... javax.persistence.Id javax.persistence.EmbeddedId javax.persistence.Version ...
javax.persistence.EmbeddedId
Applied to a persistent field or property of an entity class or mapped superclass to denote a composite primary key that is an embeddable class.(Annotation of JPA)
javax.persistence.MapsId
Designates a ManyToOne or OneToOne relationship attribute that provides the mapping for an EmbeddedId primary key, an attribute within an EmbeddedId primary key, or a simple primary key of the parent entity.(Annotation of JPA)
New to Product & Having An Issue
Greetings ObjectDB Users! I'm new to the product, and I've setup a simple test after reading the tutorial, and I'm running into some issues with queries, specifically querying by primary key. I have a domain object class Called Department, which has a member of type DomainId. DomainId has two member fields: String accountId and String objectId. The following code shows these two classes.... = employees ; } @ EmbeddedId public DomainId getDomainId ( ) { ... Am I doing something wrong with the use of @Embedded, @EmbeddedId or with my JPQL queries or is this a bug? Any help would be greatly ...
TemporalType injection with Calendar using JPA
I have ObjectDB JPA comsummed by a RESTful web service deployed on Tomcat. I am using an embedded object as a primary key, which has time fields which I have annotated with TemporalType.TIMESTAMP When I use a java.util.Date as a field on this object there is no problem. However, if I use a java.util.Calendar it encounters an exception. Calendar is what I need. Is there something obvious here that I am failing to see? ... ; } @ EmbeddedId public TimePeriod getId ( ) { ...
javax.persistence.AttributeOverride
Used to override the mapping of a Basic (whether explicit or default) property or field or Id property or field.(Annotation of JPA)
[ObjectDB 2.2.5_02] Unexpected exception (Error 990) com.objectdb.o.InternalException: java.lang.NullPointerException: null
reporting issue as requested ... Boolean. TRUE ; } @ EmbeddedId public TimePeriod getId ( ) { ...
2.0.0
... database files. Fixed a bug in preserving order of @EmbeddedId fields. Fixed a NullPointerException during cache cleanup. ...
