[SLING-6778] [Sling Models] Support Delegate Pattern for Models adapted from interfaces

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Models API 1.3.4, Sling Models Impl 1.4.0
• Component/s: Extensions
• Assignee: Unassigned
• Reporter: Justin Edelson
• Created: 11/Apr/17 19:27
• Updated: 01/May/17 11:36
• Resolved: 20/Apr/17 15:07

Description

Consider this interface:

public interface Something {
	
	String getText();

        String getOther();

}

With this model implementation:

@Model(adaptable = Resource.class, adapter = Something.class, resourceType = "myco/something")
public class SomethingImpl implements Something {
	
	@Inject
	private String text;

        @Inject
        private String other;

	public String getText() {
		return text;
	}
        public String getOther() {
                return other;
         }

}

And let's say that there is a resource with the type myco/somethingelse and that myco/something is the super type of myco/somethingelse.

In order to create a model class associated with myco/somethingelse and have that model class access the original class using the Delegate pattern, it is quite difficult to do so since you need to manually create a wrapping resource and then adapt that. I think we can facilitate this pattern through SLING-5739 and a new @Via provider.

The syntax would be something along the lines of

                @Self @Via(type = ResourceSuperType.class)
                private Something delegate;

Assuming you wanted the super type

We could also support manually setting the resource type, i.e.

                @Self @Via(value = “some/other/resourceType”, type = ForcedResourceType.class)
                private Something delegate;

Issue Links

• Blocked: SLING-5739 [Sling Models] Allow for extensible @Via providers