[jira] [Reopened] (OAK-598) TreeLocation#NULL allows to reveal the existence of items that are not accessible

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

     [ https://issues.apache.org/jira/browse/OAK-598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

angela reopened OAK-598:
------------------------


as commented on the mailing this, the problem IMO still exists
due to the fact that the NULL tree location returns null upon
TreeLocation#getPath() and the null location upon getParent().
                
> TreeLocation#NULL allows to reveal the existence of items that are not accessible
> ---------------------------------------------------------------------------------
>
>                 Key: OAK-598
>                 URL: https://issues.apache.org/jira/browse/OAK-598
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core, jcr
>            Reporter: angela
>            Assignee: Michael Dürig
>             Fix For: 0.7
>
>
> the javadoc of TreeLocation#NULL states:
> {quote}
> This {@code TreeLocation} refers to an invalid location in a tree. That is
> to a location where no item resides.
> {quote}
> while api consumers are not allowed to access items they are not allowed
> to read, the NULL location allows to determine if a given item does really
> not exist or was simply not accessible to the editing content session.
> IMO this should be fixed by not exposing the NULL implementation and
> making sure oak-jcr doesn't need it. maybe adding a shortcut method to
> test the underlying item is not null (e.g. exists()).

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