[jira] [Resolved] (OAK-690) Enforce and clarify Root contract wrt. invalid Tree instances

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

     [ https://issues.apache.org/jira/browse/OAK-690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Dürig resolved OAK-690.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 0.7

Fixed at revision 1462088
                
> Enforce and clarify Root contract wrt. invalid Tree instances
> -------------------------------------------------------------
>
>                 Key: OAK-690
>                 URL: https://issues.apache.org/jira/browse/OAK-690
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>             Fix For: 0.7
>
>
> The contract of {{Root.commit()}}, {{Root.refresh()}} and {{Root.rebase()}} specify that {{Tree}} instances acquired through that {{Root}} instance become invalid after one of these methods are called. 
> In fact the hierarchy related methods are not affected by this, which is required for higher layers to be able to reload {{Tree}} instances that have become invalid. OTOH affected methods might not immediately throw an exception but just result in undefined behaviour. I'd like to change this such that invalid {{Tree}} instances immediately throw an {{IllegalStateException}} when accessed. 

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