Context

Collection mapping output can contains nulls if the corresponding mapping method returns null.

To prevent having null items, 2 solutions:

• Having an after method that is removing all null items
• implement a method that is taking a list, mapping item per item, filter null items

Non goal

Complex filtering with custom classes and/or annotations

Proposal

I saw multiple null strategies.

We can add an collectionNullItemMappingStrategy allowing filtering output to only get non-null items into generated collections