List/Grid Tag Archives: JPA
JPA – Querydsl Projections
In my last post: JPA – Basic Projections – I’ve mentioned about two basic possibilities of building JPA Projections. This post brings you more examples, this time ...
JPA – Should I become a laziness extremist?
When you spoke with the Developers about mapping objects to relational databases, they very often complain about poor JPA performance, unpredictable behavior of JPA Providers, etc. ...
Introducing EclipseLink JPA-RS
In a previous series of posts I covered how to create a JAX-RS service that leveraged JPA for the persistence layer. EclipseLink contains a component called JPA-RS that can be used ...
JPA: Determining the Owning Side of a Relationship
When using the Java Persistence API (JPA) it is often necessary to create relationships between two entities. These relationships are defined within the data model (think database) ...
JPA – Hibernate – Type mapping on package level
When we are finally mature enough to use some custom types mapping in JPA, we usually stuck with some provider specific solution, because JPA itself doesn’t define any mechanism ...
JPA 2.0 Criteria Query with Hibernate
Criteria Query has been introduced in JPA 2.0. With the help of criteria queries you can write your queries in a type-safe way. Before criteria queries, developers had to write queries ...
JPA and CMT – Why Catching Persistence Exception is Not Enough?
Being in EJB and JPA world using CMT (Container Managed Transactions) is very comfortable. Just define few annotations to demarcate transaction boundary (or use the defaults) and that’s ...
Types of Entity Managers: Application-managed EntityManager
JPA specification defines few types of EntityManagers / Persistence Contexts. We can have:extended and transactional-scoped EntityManagers, container-managed or application-managed ...
Bidirectional @OneToMany / @ManyToOne association
One of goals in programming is representing of models from real world. Very often an application need to model some relationship between entities. In the last article about Hibernate ...
Bidirectional @OneToOne primary key association
It’s time to continue articles about Hibernate. The last one was dedicated to unidirectional @OneToOne association. So today I will show you how to obtain bidirectional @OneTonOne ...
