[jira] Assigned: (JCR-1470) NPE in BeanReferenceCollectionConverterImpl on update on empty collection

["Christophe Lombart (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-1470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christophe Lombart reassigned JCR-1470:
---------------------------------------

    Assignee: Christophe Lombart

> NPE in BeanReferenceCollectionConverterImpl on update on empty collection
> -------------------------------------------------------------------------
>
>                 Key: JCR-1470
>                 URL: https://issues.apache.org/jira/browse/JCR-1470
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: jackrabbit-ocm
>    Affects Versions: 1.5
>         Environment: mac os leopard, java5
>            Reporter: Stephane Landelle
>            Assignee: Christophe Lombart
>
> use case :
> in the same transaction :
> *) retrieve an object that has a collection of references, yet empty
> *) add an element in the collection
> *) update the object
> consequence :
> org.apache.jackrabbit.ocm.exception.ObjectContentManagerException: Cannot insert collection field : authors of class com.weka.content.api.model.Folder; nested exception is java.lang.NullPointerException: null
> java.lang.NullPointerException
> 	at org.apache.jackrabbit.ocm.manager.collectionconverter.impl.ManageableArrayList$$EnhancerByCGLIB$$8f15dde4.getSize(<generated>)
> 	at org.apache.jackrabbit.ocm.manager.collectionconverter.impl.BeanReferenceCollectionConverterImpl.addUuidProperties(BeanReferenceCollectionConverterImpl.java:154)
> 	at org.apache.jackrabbit.ocm.manager.collectionconverter.impl.BeanReferenceCollectionConverterImpl.doUpdateCollection(BeanReferenceCollectionConverterImpl.java:101)
> The failing line is in addUuidProperties :
> Value[] values = new Value[collection.getSize()];
> It seems the CGlib enhanced collection fails and needs to be initialized before.
> For example, in doUpdateCollection, if I code :
> 		// Delete existing values
> 		if (parentNode.hasProperty(jcrName)) {
> 			parentNode.setProperty(jcrName, (Value[]) null);
> 		}
> 		
> 		if (collection != null) {
> 			collection.getSize();         <<<<<<
> 		}
> I get a NPE on collection.getSize();
> but if I code :
> 		if (collection != null) {
> 			collection.getSize();
> 		}
> 		// Delete existing values
> 		if (parentNode.hasProperty(jcrName)) {
> 			parentNode.setProperty(jcrName, (Value[]) null);
> 		}
> everything runs fine?!

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