[jira] [Created] (SLING-8076) Merge Handlers should also be called on the first extension being merged in

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

David Bosschaert created SLING-8076:
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             Summary: Merge Handlers should also be called on the first extension being merged in
                 Key: SLING-8076
                 URL: https://issues.apache.org/jira/browse/SLING-8076
             Project: Sling
          Issue Type: Bug
          Components: Feature Model
    Affects Versions: Feature Model 0.2.0
            Reporter: David Bosschaert
             Fix For: Feature Model 0.2.2


When feature model extensions are merged via {{BuilderUtil.mergeExtensions(Feature, Feature,
ArtifactMerge, BuilderContext)}} any merge extensions are only invoked when the second extension instance is being merged. The first extension is simply copied into the target. 

However the Merge Handler may also need to perform some action on the first copy, for example record what feature the extension came from. This is currently not possible.

Proposal is to also call the Merge Handlers for the first merge (which is currently just a copy), so that they can also act in these cases.



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