/**
* Invokes all {@link ResourceProcessor} instances registered for the type of the given value and
* reference type.
*
* @param value must not be {@literal null}.
* @param referenceType must not be {@literal null}.
* @return
*/
@SuppressWarnings("unchecked")
public <T extends ResourceSupport> T invokeProcessorsFor(T value, ResolvableType referenceType) {
Assert.notNull(value, "Value must not be null!");
Assert.notNull(referenceType, "Reference type must not be null!");
// For Resources implementations, process elements first
if (ResourceProcessorHandlerMethodReturnValueHandler.RESOURCES_TYPE.isAssignableFrom(
referenceType)) {
Resources<?> resources = (Resources<?>) value;
ResolvableType elementTargetType =
ResolvableType.forClass(Resources.class, referenceType.getRawClass()).getGeneric(0);
List<Object> result = new ArrayList<Object>(resources.getContent().size());
for (Object element : resources) {
ResolvableType elementType = ResolvableType.forClass(element.getClass());
if (!getRawType(elementTargetType).equals(elementType.getRawClass())) {
elementTargetType = elementType;
}
result.add(invokeProcessorsFor(element, elementTargetType));
}
ReflectionUtils.setField(
ResourceProcessorHandlerMethodReturnValueHandler.CONTENT_FIELD, resources, result);
}
return (T) invokeProcessorsFor((Object) value, referenceType);
}
protected void checkInventory(String productUri, String facilityUri, int quantity) {
String url = facilityUri + "/inventoryItems?productId=" + getProductIdFromUri(productUri);
ParameterizedTypeReference<Resources<InventoryItem>> responseType =
new ParameterizedTypeReference<Resources<InventoryItem>>() {};
Resources<InventoryItem> inventories =
restTemplate.exchange(url, HttpMethod.GET, null, responseType).getBody();
InventoryItem inventory = inventories.getContent().iterator().next();
assertNotNull("environment", inventory);
assertEquals("Inventory quantity", quantity, inventory.getQuantityOnHand().intValue());
}
// <3>
@RequestMapping(method = RequestMethod.GET)
ResponseEntity<Resources<Object>> root() {
Resources<Object> objects = new Resources<>(Collections.emptyList());
URI uri =
MvcUriComponentsBuilder.fromMethodCall(
MvcUriComponentsBuilder.on(getClass()).getCollection())
.build()
.toUri();
Link link = new Link(uri.toString(), "customers");
objects.add(link);
return ResponseEntity.ok(objects);
}
private void refreshGalleryList(Resources resources) {
if (resources != null) {
List<GalleryResource> galleries = new ArrayList<GalleryResource>(resources.getContent());
if (null != this.galleryListFragmentListener) {
this.galleryListFragmentListener.onDownloadGalleriesComplete(galleries);
}
ListAdapter listAdapter = new GalleryListAdapter(getActivity(), galleries);
setListAdapter(listAdapter);
}
}
@Test
public void accessServiceUsingRestTemplate() {
// Access root resource
URI uri = URI.create(String.format(SERVICE_URI, port));
RequestEntity<Void> request = RequestEntity.get(uri).accept(HAL_JSON).build();
Resource<Object> rootLinks =
restOperations.exchange(request, new ResourceType<Object>() {}).getBody();
Links links = new Links(rootLinks.getLinks());
// Follow stores link
Link storesLink = links.getLink("stores").expand();
request = RequestEntity.get(URI.create(storesLink.getHref())).accept(HAL_JSON).build();
Resources<Store> stores =
restOperations.exchange(request, new ResourcesType<Store>() {}).getBody();
stores.getContent().forEach(store -> log.info("{} - {}", store.name, store.address));
}
/**
* Returns whether the given {@link Resources} instance matches the given {@link
* ResolvableType}. 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 ResolvableType}.
* @return
*/
static boolean isValueTypeMatch(Resources<?> resources, ResolvableType target) {
if (resources == null) {
return false;
}
Collection<?> content = resources.getContent();
if (content.isEmpty()) {
return false;
}
ResolvableType superType = null;
for (Class<?> resourcesType :
Arrays.<Class<?>>asList(resources.getClass(), Resources.class)) {
superType = ResolvableType.forClass(resourcesType, getRawType(target));
if (superType != null) {
break;
}
}
if (superType == null) {
return false;
}
Object element = content.iterator().next();
ResolvableType resourceType = superType.getGeneric(0);
if (element instanceof Resource) {
return ResourceProcessorWrapper.isValueTypeMatch((Resource<?>) element, resourceType);
} else if (element instanceof EmbeddedWrapper) {
return isRawTypeAssignable(resourceType, ((EmbeddedWrapper) element).getRelTargetType());
}
return false;
}
@RequestMapping(method = RequestMethod.GET)
HttpEntity<Resources<Profile>> showCustomers() {
Resources<Profile> resources = new Resources<Profile>(this.repository.findAll());
resources.add(this.entityLinks.linkToCollectionResource(Profile.class));
return new ResponseEntity<Resources<Profile>>(resources, HttpStatus.OK);
}
