JPA and composite primary key

Date	Tue, 07 Feb 2012 10:21:42 +0100
From	Short <lamia@mail.com>
User-Agent	Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0) Gecko/20111222 Thunderbird/9.0.1
MIME-Version	1.0
Newsgroups	comp.lang.java.help
Subject	JPA and composite primary key
Content-Type	text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding	7bit
NNTP-Posting-Host	$$afwhll$slnyo.news.x-privat.org
Message-ID	<4f30ed2a$1@news.x-privat.org> (permalink)
Organization	X-Privat.Org NNTP Server - http://www.x-privat.org
Lines	55
X-Authenticated-User	$$p9zou1n1$ng5dhdq$s2
X-Complaints-To	abuse@x-privat.org
Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!newsfeed.x-privat.org!x-privat.org!not-for-mail
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.help:1553

Show key headers only | View raw

Hi.
Here's the scenario:
An abstract class that defines an Id "generated":
public abstract Class1{
     [...]
     @Column(name = "ID")
     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = 
"IdSequenceGen")
     @Id
     public Long getId()
     {
         return this.id;
     }
     [...]
}

An entity Class, extending Class1, that has a composite PK: The 'Class1' 
ID and a second field:

@Entity
@IdClass(Class2.class)
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@SequenceGenerator(name = "IdSequenceGen", sequenceName = "SQ_CLASS2")
@Table(name = "CIM_PERSON_DEMOGRAPHIC")
public class Class2 extends Class1{
     private Integer prog = 0;

     @Column(name = "PROG")
     @Id
     public Integer getProg()
     {
         return prog;
     }
     [...]
}

But in this case I've this error at runtime:
javax.persistence.PersistenceException: [PersistenceUnit: datamodel] 
Unable to configure EntityManagerFactory
	at 
org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:375)
	at 
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
	at 
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
	at 
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
	at 
com.noemalife.platform.dm.test.AbstractTest.buildEntityManager(AbstractTest.java:111)
Caused by: org.hibernate.AnnotationException: Unknown Id.generator: 
IdSequenceGen

How can i solve this problem?

Thank you so much

Back to comp.lang.java.help | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

JPA and composite primary key Short <lamia@mail.com> - 2012-02-07 10:21 +0100
  Re: JPA and composite primary key Lew <lewbloch@gmail.com> - 2012-02-07 10:45 -0800

csiph-web