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I have created sling model for the component.
While creating the sling model i need to specify the
@Model(adaptables = Resource.class) or @Model(adaptables=slinghttpservletrequest)
(adaptables = Resource.
) or @Model(adaptables=slinghttpservletrequest)
On what bases we have to select the adaptables.
I am new to AEM Kindly explain in detail to understand the concept.
If you want to read the values that an author enters into a component dialog, then:
@Model(adaptables = Resource.class)
will be fine. For more on working with Sling Models on 6.5 - see this article -- Building Experience Manager 6.5 Components using Granite/Coral Resource Types
You can refer to this two link ,it has detail description for the same and videos too.
AEM Developer Learning : Deep Dive on Sling Models in AEM6.3 : Part-1
AEM Developer Learning : Deep Dive on Sling Model in AEM 6.3 : Part-2
Happy to help !
The above links should clear your understanding.
Adapting to a SlingHttpServletRequest gives you more options to manipulate resources in general.
Moreover you can even access request params if you do so.
Adapting to a resource can be done when you just need resource properties and there is not much to do with the request.
Please check if my answer here helps.
I would recommend reviewing these resources below.  https://sling.apache.org/documentation/the-sling-engine/adapters.html  https://helpx.adobe.com/experience-manager/6-5/sites/developing/using/sling-adapters.html