It is a good idea to use case classes as EmbeddedId class. Id classes can be used to specify an embeddable composite primary key class owned by the entity (more…). Scala Case classes provide a default equals and an “automatic” Continue reading Scala Case Class as JPA EmbeddedId
Scala provides the possibility to define constructor argument that are class properties as well. I recoded the entity OrganisationAssociation to use j__organisations as argument. The example entity from my post Relations with Scala Collections and JPA looks like this: @Entity Continue reading Constructor Arguments with JPA-Annotations
Java Collection JPA’s One to Many and Many to Many relations require an attribute of type java.util.Collection like it is shown in the next example. This will be normally a List interface and a ArrayList implementation. … @OneToMany public Collection Continue reading Relations with Scala Collections and JPA
I am using: a Mapped Superclass for all basic entities (MIPEntity) a pre persist entity listener to change some values the following hierarchy: MIPEntity . . . // do something with oi } withQuery (filter) Apply function on entity got Continue reading Scala Entity and JPAExtension Examples (JPA 2.0)
JPAExtension (JPA for Scala, ORM for Scala) should: be fully JPA 2.0 compliant Persistence Layer and Object Relational Mapper (ORM) for Scala perfectly replace the Java API with Scala Collections and other niceties support Transaction Scope Wrappers with Scalas Functional Continue reading JPA For Scala
I love the “pattern” used in this post (which I got from here). Working with JPA queries I tried to follow the same pattern. In a REST resource I needed to query for one entity and change the location attribute. Continue reading Wrapping JPA Queries
