Cannot create customs links for ResourceProcessor<PagedResources<...>> [DATAREST-375]

Manuel Lara Caro opened DATAREST-375 and commented

I've a Controller that exposes a several custom search based in Specification and I want to create the search link of HATEOAS, but it never run:

@RestController
@RequestMapping(value = "/seasons/search")
@ExposesResourceFor(Season.class)
//public class SeasonRepositoryCustomRest implements ResourceProcessor<RepositoryLinksResource> {
//public class SeasonRepositoryCustomRest implements ResourceProcessor<Resource<Season>> {
public class SeasonRepositoryCustomRest implements ResourceProcessor<PagedResources<Resource<Season>>> {
	
	@RequestMapping(value = "/findByFootballer", method = RequestMethod.GET, produces = "application/json")
	public HttpEntity<PagedResources<Resource<Season>>> findByFootballer(@RequestParam(value = "id") final long id,
			Pageable pageable, PagedResourcesAssembler<Season> assembler) {
		
		Page<Season> page = repository.findAll(new Specification<Season>() {

			@Override
			public Predicate toPredicate(Root<Season> root, CriteriaQuery<?> query, CriteriaBuilder builder) {
				
				query.groupBy(root.<String>get("name"));
				
				return builder.equal(root.joinSet("statistics", JoinType.INNER)
						.<FootballPlayer>get("footballer").<Long>get("id"), id);
			}
		}, pageable);
		
		PagedResources<Resource<Season>> body = assembler.toResource(page);
		
		return new ResponseEntity<PagedResources<Resource<Season>>>(body, HttpStatus.OK);
	}

	@Override
	public PagedResources<Resource<Season>> process(PagedResources<Resource<Season>> resource) {
		
		resource.add(linkTo(getClass()).withRel("search"));
		
		return resource;
	}
}

I've been debugging the Spring code and I've seen that if you use pagination it isn't possible:

/**
		 * Returns whether the given {@link Resources} instance matches the given {@link TypeInformation}. We predict this
		 * by inspecting the first element of the content of the {@link Resources}.
		 * 
		 * @param resources the {@link Resources} to inspect.
		 * @param target that target {@link TypeInformation}.
		 * @return
		 */
		private static boolean isValueTypeMatch(Resources<?> resources, TypeInformation<?> target) {

			if (resources == null || !Resources.class.equals(resources.getClass())) {
				return false;
			}

			Collection<?> content = resources.getContent();

			if (content.isEmpty()) {
				return false;
			}

			Object element = content.iterator().next();

			if (!(element instanceof Resource)) {
				return false;
			}

			TypeInformation<?> resourceTypeInformation = target.getSuperTypeInformation(Resources.class).getComponentType();
			return ResourceProcessorWrapper.isValueTypeMatch((Resource<?>) element, resourceTypeInformation);
		}

No further details from DATAREST-375