code: @Override
  	public Response handle(JsonPath jsonPath, QueryAdapter queryAdapter, RepositoryMethodParameterProvider parameterProvider, Document requestBody) {
  		String resourceName = jsonPath.getElementName();
  		PathIds resourceIds = jsonPath.getIds();
  		RegistryEntry registryEntry = resourceRegistry.getEntry(resourceName);
  		if (registryEntry == null) {
  			throw new ResourceNotFoundException(resourceName);
  		}
  		String id = resourceIds.getIds().get(0);
  
  		@SuppressWarnings("unchecked")
  		Class<? extends Serializable> idClass = (Class<? extends Serializable>) registryEntry.getResourceInformation().getIdField().getType();
  		Serializable castedId = typeParser.parse(id, idClass);
  		ResourceRepositoryAdapter resourceRepository = registryEntry.getResourceRepository(parameterProvider);
  		JsonApiResponse entities = resourceRepository.findOne(castedId, queryAdapter);
  		
  		Document responseDocument = documentMapper.toDocument(entities, queryAdapter);
  		
  		// return explicit { data : null } if values found
  		if(!responseDocument.getData().isPresent()){
  			responseDocument.setData(Nullable.nullValue());
  		}
  
  		return new Response(responseDocument, 200);
  	}
docs: {@inheritDoc}
  
  Passes the request to controller method.