[jira] [Created] (SLING-10645) Update Sling Resource Merger with handling for multi-valued properties

["Henry Kuijpers (Jira)" <ji...@apache.org>]

Henry Kuijpers created SLING-10645:
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             Summary: Update Sling Resource Merger with handling for multi-valued properties
                 Key: SLING-10645
                 URL: https://issues.apache.org/jira/browse/SLING-10645
             Project: Sling
          Issue Type: Improvement
          Components: ResourceResolver
    Affects Versions: Resource Merger 1.4.0
            Reporter: Henry Kuijpers


Sling Resource Merger is able to handle properties, not individual property values.

When setting up this node structure (with AEM's extraClientlibs property in TouchUI dialogs):
+ /libs/wcm/basicpage/cq:dialog@extraClientlibs=["a", "b", "c"]
+ /apps/website/components/page@sling:resourceSuperType="wcm/basicpage"
+ /apps/website/components/page/cq:dialog@extraClientlibs=["d", "e"]

We want to make sure that the extraClientlibs property that is being read in website/components/page/cq:dialog will return ["a", "b", "c", "d", "e"]. Currently, it will just return ["d", "e"], since the extraClientlibs-property is *overwritten*. 

It would be nice to add additional logic to allow more control over the inheritance of the values that are tied to a parent's extraClientlibs-property.

Maybe we can come up with some additional properties that can function as instructions to the Resource Merger (next to the ones we already have), so that there can be more fine-grained control over the inheritance/removal of property values in multi-valued scenarios.



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