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java Programming Glossary: myentityHibernate : Downside of merge() over update() http://stackoverflow.com/questions/2118257/hibernate-downside-of-merge-over-update you can use the following approach ... public void updateMyEntity MyEntity updateableMyEntity load does not hit the database MyEntity.. use the following approach ... public void updateMyEntity MyEntity updateableMyEntity load does not hit the database MyEntity myEntity.. approach ... public void updateMyEntity MyEntity updateableMyEntity load does not hit the database MyEntity myEntity MyEntity session.load..
Elegantly handling constraint violations in EJB/JPA environment? http://stackoverflow.com/questions/2519902/elegantly-handling-constraint-violations-in-ejb-jpa-environment be unique with a @Column annotation. @Entity public class MyEntity implements Serializable private String uniqueName public MyEntity.. implements Serializable private String uniqueName public MyEntity @Column unique true nullable false public String getUniqueName.. 2 Duke Query InsertObjectQuery com.stackoverflow.q2522643.MyEntity@dba6a9 at org.eclipse.persistence.exceptions.DatabaseException.sqlException..
Java - JPA - @Version annotation http://stackoverflow.com/questions/2572566/java-jpa-version-annotation But still I am not sure how it works Let's say an entity MyEntity has an annotated version property @Entity public class MyEntity.. has an annotated version property @Entity public class MyEntity implements Serializable @Id @GeneratedValue private Long id..
Hibernate JPA Sequence (non-Id) http://stackoverflow.com/questions/277630/hibernate-jpa-sequence-non-id the primary key @Entity @Table name MyTable public class MyEntity ... @Id ... etc public Long getId return id note NO @Id here.. return myVal Then when I do this em.persist new MyEntity the id will be generated but the mySequenceVal property will.. ... private Long number @Entity public class MyEntity @Id .. private Long id @OneToOne ... private GeneralSequnceNumber..
In JPA 2, using a CriteriaQuery, how to count results http://stackoverflow.com/questions/2883887/in-jpa-2-using-a-criteriaquery-how-to-count-results cb entityManager.getCriteriaBuilder CriteriaQuery MyEntity cq cb .createQuery MyEntityclass initialize predicates here.. CriteriaQuery MyEntity cq cb .createQuery MyEntityclass initialize predicates here return entityManager.createQuery.. share improve this question A query of type MyEntity is going to return MyEntity You want a query for a Long no CriteriaBuilder..
Using setValueAt to recreate mutually exclusive check boxes http://stackoverflow.com/questions/7920068/using-setvalueat-to-recreate-mutually-exclusive-check-boxes another way of getting the number of rows from model List MyEntity myEntities this.getDatas for int i 0 i myEntities.size i if..
Difference between JPA Entity and Hibernate Entity http://stackoverflow.com/questions/955515/difference-between-jpa-entity-and-hibernate-entity
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