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https://issues.apache.org/jira/browse/SLING-3886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14115659#comment-14115659
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Justin Edelson commented on SLING-3886:
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Applied the patch with two additional tests in r 1621361. Great work!
> Sling Models: support adapters for models different from the implementation
> class
> ---------------------------------------------------------------------------------
>
> Key: SLING-3886
> URL: https://issues.apache.org/jira/browse/SLING-3886
> Project: Sling
> Issue Type: New Feature
> Components: Extensions
> Reporter: Stefan Seifert
> Labels: models
> Fix For: Sling Models Implementation 1.1.0, Sling Models API 1.1.0
>
> Attachments: 140827_SLING-3886_adapters_support.patch,
> 140829_SLING-3886_adapters_support.patch,
> 140829_SLING-3886_adapters_support_v2.patch
>
>
> currently, as adapter (adaption target) only the implementation class itself
> that is annotated with the @Model annotation is supported (which can be
> either an interface or a class).
> if the model is not just a simple model but a class with more complex
> business logic the following scenario is required:
> * a "service" interface is defined
> * this service interface ist not directly mapped to injected values, but
> provides higher-level method
> * an implementation class with @Model annotation is implemented which gets
> the required values injectd internally, but implements the interface for
> outside access
> this is currently not possible with sling models.
> the attached patch extends the following features:
> * extends the @Model annotation with an optional "adapters" attribute
> * if defined, only the listed adapters are registered for the adapter
> factory, not the implementation class itself (unless it is listed the
> "adapters" attribute as well)
> * in the adapters attribute only the implementation class itself or
> interfaces that it implements or superclasses can be defined
> * with this the scenario above is perfectly possible
> * unit tests included which simulate the bundle add/remove usecases which is
> required to do the indirect implementation class mapping
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