Deligate design pattern

[knki]

For our requirement, I am creating a class called ListDelegate and implementing the List component interface. because i want to add extra functionlity sortBy ranking  (which i added in page properties) ,like sortBy asc and desc present in list, how to solve this thing or any other solution?

[Mahesh_Gunaje · Accepted solution]

Hi @knki 

These links might help you. check the solutions given by @VeenaVikraman 

You are utilizing the Out of the box core component feature. Plus you are adding your own customization by utilizing the Sling delegation pattern.

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/delegation-pattern-for-sli...

https://github.com/adobe/aem-core-wcm-components/wiki/Delegation-Pattern-for-Sling-Models

[VeenaVikraman]

@knki Check this https://github.com/adobe/aem-core-wcm-components/wiki/Delegation-Pattern-for-Sling-Models .also read https://medium.com/@veena.vikraman19/aem-avoiding-delegation-pattern-pitfalls-with-core-components-9... 

If you are using everything from List https://github.com/adobe/aem-core-wcm-components/blob/main/bundles/core/src/main/java/com/adobe/cq/w... as is , you can just add @delegate annotation.

But I assume you are going to add one more option for sorting . That means you will need to override https://github.com/adobe/aem-core-wcm-components/blob/main/bundles/core/src/main/java/com/adobe/cq/w... the `getListItems` to modify the logic of `getStaticListItems` method to add the sorting mechanism.