Gordon Yorke questions

Gordon Yorke answers

• JPA (Hibernate, EclipseLink) mapping: why doesn't this code work (chain of 2 relationships using JPA 2.0, @EmbeddedId composite PK-FK)?
• How do I catch the constraint violation exception from EclipseLink?
• How to set a backreference from an @EmbeddedId in JPA
• Problem with JPA, EclipseLink and case sensitive mysql
• EclipseLink @MappedSuperclass and generics
• Sequences with Dynamic Entities in EclipseLink
• JPA 2.0 Implementations comparison : Hibernate 3.5 vs EclipseLink 2 vs OpenJPA 2
• jndi database connection with jpa and eclipselink
• How to get the primary key of any JPA entity?
• Error While acquiring Client session in TopLink