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Date: Thu, 16 Aug 2007 15:01:34 -0700 (PDT)
From: "Christophe Lombart (JIRA)" <jira@apache.org>
To: dev@jackrabbit.apache.org
Subject: [jira] Commented: (JCR-1053) Calling size method of a
 ManageableArrayList causes NullPointerException
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    [ https://issues.apache.org/jira/browse/JCR-1053?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel#action_12520387 ]=20

Christophe Lombart commented on JCR-1053:
-----------------------------------------

Testing on !parentNode.hasNodes() is not sufficient. We have to check if th=
e parent node has children based on a specific type. The type use for the c=
ollection elements. It is possible to have other children (based on another=
 nt) which are not element of the collection.=20

> Calling size method of a ManageableArrayList causes NullPointerException
> ------------------------------------------------------------------------
>
>                 Key: JCR-1053
>                 URL: https://issues.apache.org/jira/browse/JCR-1053
>             Project: Jackrabbit
>          Issue Type: Bug
>          Components: jcr-mapping
>    Affects Versions: 1.3
>            Reporter: Andr=C3=A9 Bierwolf
>            Assignee: Christophe Lombart
>         Attachments: NTCollectionConverterImpl.diff
>
>
> When using the NTCollectionConverterImpl with proxy=3D"true" a call on th=
e size () method of a ManageableArrayList causes a NullPointerException if =
there is no underlying List. LazyCollectionLoader doLoad returns null becau=
se there is are no children.
> The ManageableArrayList is created because the isNull method of the NTCol=
lectionConverterImpl class always returns false.=20
> According to the comment line this is done because the getCollectionNodes=
 always returns a list.=20
> But after the fix for JCR-882 this is not correct anymore.
> The attached fix corrects this.=20
> The only question remaining is how to differ between an empty list and a =
null-value for the field containing the list.

--=20
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