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Subject: Does embedded class works only with enhancer?
Date: Sun, 19 Aug 2007 17:51:12 -0700
Message-ID: 
 <051B157340C53E46B6DF13FD67B533FD03EFB465@nex2004cdc.us.global.schwab.com>
Thread-Topic: Does embedded class works only with enhancer?
thread-index: AcfixDSTZmR+3rRfQ7CQx76MwQDEvg==
From: "Das, Aditi" <Aditi.Das@schwab.com>
To: <dev@openjpa.apache.org>

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Hi,
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I have a entity and a emdeddable class as below.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
@Entity(name =3D "ARTICLE")
public class Article  implements Cloneable,Serializable{
      @Id
     @GeneratedValue(strategy=3DGenerationType.AUTO)
     private long id;
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     @Embedded
     private Content content;
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     @Version
     @Column(name =3D "VER")
     private long version;
}
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@Embeddable
public class Content {
     @Lob
     private String content;
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     public String getContent() {
          return content;
     }
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     public void setContent(String content) {
          this.content =3D content;
     }
}
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D
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When I run the below code with enhancer, everything works fine,
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
  tx.begin();
  Article article =3D  em.find(Article.class,11);
  article.getContent().setContent("Once upon a time there is a city of
Hamelin!!!");
  tx.commit();
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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But without enhancer, it gives me the below error.
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------------------------------------------------------------------------
----------------------------------------------------------
Exception in thread "main" <openjpa-0.0.0-runknown fatal store error>
org.apache.openjpa.persistence.RollbackException: no-saved-fields
 at
org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImp
l.java:420)
 at jpa.ArticleTest.main(ArticleTest.java:24)
Caused by: <openjpa-0.0.0-runknown fatal general error>
org.apache.openjpa.persistence.PersistenceException: no-saved-fields
 at
org.apache.openjpa.kernel.StateManagerImpl.dirtyCheck(StateManagerImpl.j
ava:799)
 at
org.apache.openjpa.kernel.BrokerImpl$ManagedCache.dirtyCheck(BrokerImpl.
java:4649)
 at
org.apache.openjpa.kernel.BrokerImpl$ManagedCache.access$0(BrokerImpl.ja
va:4644)
 at
org.apache.openjpa.kernel.BrokerImpl.hasTransactionalObjects(BrokerImpl.
java:3767)
 at org.apache.openjpa.kernel.BrokerImpl.setDirty(BrokerImpl.java:3884)
 at
org.apache.openjpa.kernel.StateManagerImpl.setPCState(StateManagerImpl.j
ava:207)
 at
org.apache.openjpa.kernel.StateManagerImpl.dirty(StateManagerImpl.java:1
533)
 at
org.apache.openjpa.kernel.StateManagerImpl.dirty(StateManagerImpl.java:1
472)
 at
org.apache.openjpa.kernel.StateManagerImpl.dirtyCheck(StateManagerImpl.j
ava:809)
 at
org.apache.openjpa.kernel.BrokerImpl$ManagedCache.dirtyCheck(BrokerImpl.
java:4649)
 at
org.apache.openjpa.kernel.BrokerImpl$ManagedCache.access$0(BrokerImpl.ja
va:4644)
 at
org.apache.openjpa.kernel.BrokerImpl.hasTransactionalObjects(BrokerImpl.
java:3767)
 at
org.apache.openjpa.kernel.BrokerImpl.getTransactionalStates(BrokerImpl.j
ava:3756)
 at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1898)
 at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:1879)
 at
org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:17
97)
 at
org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime
.java:81)
 at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1327)
 at
org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:
866)
 at
org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImp
l.java:409)
 ... 1 more
------------------------------------------------------------------------
-----------------------------------------------------------------
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When I traced back, I found the below code in BrokerImpl(kernel package)
where the embadable stateManager is getting added to the _untracked.
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       public void add(StateManagerImpl sm) {
            if (!sm.isIntercepting()){
                if (_untracked =3D=3D null)
                    _untracked =3D new HashSet();
                _untracked.add(sm);
            }
            ....................
     }
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If I change the above code to , everything works fine..
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         public void add(StateManagerImpl sm) {
            if (!sm.isIntercepting() && !sm.isEmbedded()) {
                if (_untracked =3D=3D null)
                    _untracked =3D new HashSet();
                _untracked.add(sm);
            }
            ....................
     }
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Not sure whether it is a feature of enhancer or a bug..Or am I missing
out any annotation/property etc.?
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Please let me know,
Aditi
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