What are resource facades?
8.2.8. Resource facades Sometimes it is useful to add resources which are just containers or layers on other resources. For example if you want to represent a collection of Comment with a start index and a certain number of entries, in order to implement paging. Such a collection is not really an entity in your model, but it should obtain the "add" and "list" link relations for the Comment entity. This is possible using resource facades. A resource facade is a resource which implements the ResourceFacade interface for the type T, and as such, should receive all links for that type.