[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - RelationSet.getIdList() -> working with Relation Sets

[Oyabun]

Hi!

According to the that comment below, it is not possible to work with relation sets, if the calling method ist executed with tx = null.

The getIdList() requires a tx or else the setHandle is always null -> which means that JBOSS (4.0.2) does not allow something like person.getRelatives().iterator() if the tx is null.

Can someone confirm this?

 public class RelationSet implements Set {
  |     private JDBCCMRFieldBridge cmrField;
  |     private EntityEnterpriseContext ctx;
  |     private List[] setHandle;
  |     private Class relatedLocalInterface;
  | 
  |     //
  |     // Most of this class is a boring wrapper arround the id set.
  |     // The only interesting hitch is the setHandle.  This class doesn't
  |     // have a direct referance to the related id set, it has a referance
  |     // to a referance to the set. When the transaction is completed the 
  |     // CMR field sets my referance to the set to null, so that I know that
  |     // this set is no longer valid. See the ejb spec for more info.
  |     //
  | 
  |     public RelationSet(
  |           JDBCCMRFieldBridge cmrField, 
  |           EntityEnterpriseContext ctx, 
  |           List[] setHandle) {
  | 
  |        this.cmrField = cmrField;
  |        this.ctx = ctx;
  |        this.setHandle = setHandle;
  |        relatedLocalInterface = cmrField.getRelatedLocalInterface();   
  |     }
  | 
  |     private List getIdList() {
  |        if(setHandle[0] == null) {
  |           throw new IllegalStateException("A CMR collection may only be used " +
  |                 "within the transction in which it was created");
  |        }
  | 
  | 

Source:
http://www.cenqua.com/clover/eg/jboss/report/org/jboss/ejb/plugins/cmp/jdbc/bridge/RelationSet.html

--
Alex

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