[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2756) PostLoadEventListener is triggered on not fully loaded entity

[Roman Pichlík (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_27670 ] 

Roman Pichlík commented on HHH-2756:
------------------------------------

Collection has to be mapped with fetch="join" strategy.

> PostLoadEventListener is triggered on not fully loaded entity
> -------------------------------------------------------------
>
>                 Key: HHH-2756
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2756
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.4.sp1
>            Reporter: Roman Pichlík
>            Priority: Minor
>
> PostLoadEventListener is triggered, but entity is not fully loaded especially is not possible to operate on mapped collection because org.hibernate.LazyInitializationException: illegal access to loading collection is thrown. PostLoadEventListener should be triggered when is entity fully loaded.
> Let say, we have Parent, Child entity and PostLoadEventListener which iterates over child collection.
> public class Parent {
>   private Set<Child> children;
> }
> public class PostLoadEventListener implements PostLoadEventListener {
>         public void onPostLoad(PostLoadEvent event) {
>              Parent parent = (Parent) event.getEntity();
>              for(Child child: parent.getChildren()){ // org.hibernate.LazyInitializationException: illegal access to loading collection
>                  System.out.println(child);
>              }
>         }
> }
> Fix tip: see org.hibernate.loader.Loader#initializeEntitiesAndCollections, if i understood well the key are following statements.
> 		if ( hydratedObjects!=null ) {
> 			int hydratedObjectsSize = hydratedObjects.size();
> 			if ( log.isTraceEnabled() ) {
> 				log.trace( "total objects hydrated: " + hydratedObjectsSize );
> 			}
> 			for ( int i = 0; i < hydratedObjectsSize; i++ ) {
> 				TwoPhaseLoad.initializeEntity( hydratedObjects.get(i), readOnly, session, pre, post );    //event is trigerred here
> 			}
> 		}
> 		
>                 //but collection are loaded by this code 
> 		if ( collectionPersisters != null ) {
> 			for ( int i=0; i<collectionPersisters.length; i++ ) {
> 				if ( !collectionPersisters[i].isArray() ) {					
> 					endCollectionLoad( resultSetId, session, collectionPersisters[i] );
> 				}
> 			}
> 		}
>                //post event handlers should be trigerred here

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