I'm having difficulty representing this query (which works on the database directly) as a criteria query in Hibernate (version 3.2.5): SELECT s.* FROM ftp_status s WHERE (s.datetime,s.connecti...

I have two base abstract classes and there are multiple additional classes derived from these two, adding additional attributes etc. There exist relations between those specific derived types. A ...

I'm asking and answering my own question, but i'm not assuming i have the best answer. If you have a better one, please post it! Related questions: How to set a backreference from an @EmbeddedId i...

I've those 2 entities Class A { @OneToMany(mappedBy="a") private List<B> bs; } Class B { @ManyToOne private A a; private String name; } 1) I would like to construct a query that sa...

I am using Hibernate with spring. I have a model-class like this. @Entity @Table(name = "forumtopic") public final class Forumtopic extends AbstractUserTracking implements java.io.Serializable...

I have a table where the the parent object has an optional many-to-one relationship. The problem is that the table is setup to default the fkey column to 0. When selecting, using fetch="join", et...

I have two entities: @Entity public class File ....... @Id @GeneratedValue(strategy=GenerationType.AUTO) private int id; @OneToMany(fetch=FetchType.LAZY, mappedBy="file", cascade=CascadeType.ALL) ...

I have the following annotated Hibernate entity classes: @Entity public class Cat { @Column(name = "ID") @GeneratedValue(strategy = GenerationType.AUTO) @Id private Long id; @OneToMany(mappedB...

I am working on a JPA project. I need to use a @OneToMany mapping on a class that has three primary keys. You can find the errors and the classes after this. javax.persistence.PersistenceExceptio...

I'm piggy-backing off of How to join tables in unidirectional many-to-one condition?. If you have two classes: class A { @Id public Long id; } class B { @Id public Long id; @ManyToOne @Joi...