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https://issues.apache.org/jira/browse/SLING-3716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14048171#comment-14048171
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Stefan Seifert commented on SLING-3716:
---------------------------------------

in order to support constructor-based injection with the same features like the 
field injection, several sling models annotations have to be extended to be 
supported as constructor parameters as well:
* Default
* Filter
* Optional
* Required
* Source
* Via

> Sling Models: Add support for constructor dependency injection
> --------------------------------------------------------------
>
>                 Key: SLING-3716
>                 URL: https://issues.apache.org/jira/browse/SLING-3716
>             Project: Sling
>          Issue Type: Improvement
>          Components: Extensions
>            Reporter: Stefan Seifert
>            Priority: Minor
>
> Currently, Sling Models only supports dependency injection for fields (or 
> interface getter methods), but not for constructor arguments. This ticket is 
> for discussing what this constructor dependency injection should support, and 
> perhaps finally provide a patch to implement it.
> This is somewhat related to SLING-3715 for class-based dependency injection, 
> because this would come in especially handy for constructor injection.



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