How to add HATEOAS links in a sub resource

Question

I have a parent resource called the AdminResource and a child resource called the AdminModuleResource.

The resource of the parent is correctly fitted with HATEOAS links:

Answer 1

Just stumbled on this question, even though it is quite old, but may be worth answering for others implementing similar functionality. Basically, you create embedded resources for AdminModuleResource on your AdminResource and build the links for these embedded resources within your AdminResourceAssembler. The code below is a simplified version of what is posted on this answer

On AdminResource add:

@JsonUnwrapped
private Resources<EmbeddedWrapper> embeddeds;
// + setters/getters

On AdminResourceAssembler add:

EmbeddedWrappers wrapper = new EmbeddedWrappers(true);

List<EmbeddedWrapper> wrappers = (List<EmbeddedWrapper>) super.buildEmbeddables(entity);
Set<AdminModuleResource> moduleResources = adminResource.getModuleResources( );
if(!moduleResources.isEmpty( ))
    wrappers.add(wrapper.wrap(adminModuleResourceAssembler.toResources(moduleResources)));

adminResource.setEmbeddeds(new Resources<>(wrappers));