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https://issues.apache.org/jira/browse/OAK-171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408006#comment-13408006
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Michael Dürig commented on OAK-171:
-----------------------------------
+1
This might also make sense for simplifying the {{ConflictHandler}} of the
{{Root.rebase()}} operation.
> Add NodeState.compareAgainstBaseState()
> ---------------------------------------
>
> Key: OAK-171
> URL: https://issues.apache.org/jira/browse/OAK-171
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Jukka Zitting
> Priority: Minor
>
> The {{NodeStore.compare()}} method provides a common mechanism for comparing
> any two node states, and we originally decided to put the method on the
> {{NodeStore}} interface instead of on {{NodeState}} as for performance
> reasons we may want to dispatch the actual diffing operation based on the
> implementation of either one of the given {{NodeState}} instances.
> In practice it turns out that there's an important special case of this
> operation, comparing a {{NodeState}} against an earlier version of it (i.e. a
> base state), that is easy to dispatch based on just the modified state and is
> used so often that keeping the separate {{NodeStore}} reference around for
> the comparison operation tends to unnecessarily complicate relevant code.
> Thus I'd like to introduce a {{NodeState.compareAgainstBaseState()}} method
> signature in {{oak-core}} for this specific case. We'd still keep the
> {{NodeStore.compare()}} method around for more complicated diffing cases.
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