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Chetan Mehrotra commented on OAK-5160:
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FWIW I came across {{DiffObserver}} which is meant for this purpose i.e.
provide consistent access to before and after.
> change Nonnull to Nullable in FilteringAwareObserver.contentChanged
> -------------------------------------------------------------------
>
> Key: OAK-5160
> URL: https://issues.apache.org/jira/browse/OAK-5160
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.5.14
> Reporter: Stefan Egli
> Assignee: Stefan Egli
> Fix For: 1.6, 1.5.15
>
>
> FilteringAwareObserver (and thus ChangeProcessor)'s {{contentChanged}} has
> {{@Nonnull}} for the {{before}} parameter. But for the very first
> contentChanged (at initialization time) this can actually be null. So we
> should change that to {{@Nullable}} there.
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