java类javax.ws.rs.ext.Providers的实例源码

/**
 * Lookup a resource of given <code>resourceType</code> type, either using a suitable {@link ContextResolver} if
 * <code>providers</code> is not <code>null</code> and a {@link ContextResolver} for given <code>resourceType</code>
 * is available, or trying to obtain the resource from {@link Context} using given <code>resourceType</code> as
 * context resource key.
 * @param <R> Resource type
 * @param caller Caller class
 * @param resourceType Resource type to lookup (not null)
 * @param providers JAX-RS {@link Providers}, if available
 * @return Resource instance, or an empty optional if not available
 */
public static <R> Optional<R> lookupResource(Class<?> caller, Class<R> resourceType, Providers providers) {
    ObjectUtils.argumentNotNull(resourceType, "Resource type must be not null");

    R resource = null;

    // try to use a ContextResolver, if available
    ContextResolver<R> resolver = providers.getContextResolver(resourceType, null);
    if (resolver != null) {
        resource = resolver.getContext(caller);
    }

    if (resource == null) {
        // lookup in context
        resource = Context.get()
                .resource(resourceType,
                        (caller != null) ? caller.getClassLoader() : ClassUtils.getDefaultClassLoader())
                .orElse(null);
    }

    return Optional.ofNullable(resource);
}

protected javax.ws.rs.core.Response davPropFind(Long id, UriInfo uriInfo, String depth, Providers providers) throws AuthenticationException, AuthorisationException,
ServiceException {
    final Response folder = new Response(new HRef(uriInfo.getRequestUri()), null, null, null, new PropStat(new Prop(new DisplayName("My Collection"),
            new CreationDate(new Date()), new GetLastModified(new Date()), COLLECTION), new Status((StatusType) OK)));
    if (depth.equals(DEPTH_0) || id == null) {
        return javax.ws.rs.core.Response.status(MULTI_STATUS).entity(new MultiStatus(folder)).build();
    }
    final Collection<Response> responses = new LinkedList<Response>(singletonList(folder));
    Iterator<FileOutVO> it = WebUtil.getServiceLocator().getFileService().getFiles(getAuth(), getFileModule(), id, null, null, null).iterator();
    if (it != null) {
        while (it.hasNext()) {
            FileOutVO out = it.next();
            // responses.add(buildResponse(f, uriInfo.getAbsolutePathBuilder().path(format("%s", c.getMatchCode())).build(), providers));
            FilePathSplitter filePath = new FilePathSplitter(out.getFileName());
            String extension = filePath.getExtension();
            if (isTempFile(extension) || isEditableFile(extension)) {
                responses.add(buildResponse(out, uriInfo.getAbsolutePathBuilder().path(getDavFileName(out)).build(), providers));
            }
        }
    }
    return javax.ws.rs.core.Response.status(MULTI_STATUS).entity(new MultiStatus(responses.toArray(new Response[0]))).build();
}

@Test
public void testLocateMostRelevantConstructor() {
    ReflectionProvider rp = instance(ReflectionProvider.class);

    Providers providers = instance(Providers.class);
    ProviderFilter providerFilter = instance(ProviderFilter.class);

    Field f = rp.getField(JaxRsResolverTest.class, "genericField3");

    RuntimeDelegate.setInstance(new DefaultRuntimeDelegate());

    MessageBodyReader messageBodyReader = providers.getMessageBodyReader(f.getType(), f.getGenericType(), f.getAnnotations(), MediaType.APPLICATION_XML_TYPE);

    assertNotNull(messageBodyReader);
    assertEquals(PersonMessageBodyReader.class, messageBodyReader.getClass());

    Constructor<?> c = providerFilter.mostRelevantConstructor(messageBodyReader.getClass());
    assertEquals(4, c.getParameterCount());
    assertEquals("public com.geemvc.jaxrs.PersonMessageBodyReader(javax.ws.rs.core.Application,javax.ws.rs.core.UriInfo,javax.ws.rs.core.HttpHeaders,javax.ws.rs.ext.Providers)", c.toString());
}

@Override
protected void configure() {
    jerseyToGuice(MultivaluedParameterExtractorProvider.class);
    jerseyToGuice(Application.class);
    jerseyToGuice(Providers.class);

    // request scoped objects, but hk will control their scope
    // must be used in guice only with Provider
    jerseyToGuice(UriInfo.class);
    jerseyToGuice(ResourceInfo.class);
    jerseyToGuice(HttpHeaders.class);
    jerseyToGuice(SecurityContext.class);
    jerseyToGuice(Request.class);
    jerseyToGuice(ContainerRequest.class);
    jerseyToGuice(AsyncContext.class);

    if (!guiceServletSupport) {
        // bind request and response objects when guice servlet module not registered
        // but this will work only for resources
        jerseyToGuice(HttpServletRequest.class);
        jerseyToGuice(HttpServletResponse.class);
    }
}

/**
 * Returns the request content as the given type. IF the content is a collection, returns a list of elements of the given type
 * 
 * @param request
 * @param type
 * @return
 */
public static Object getContent(byte[] raw, Providers providers, HttpHeaders httpHeaders, Class<?> type) {
    try {
        return getContent(new ByteArrayInputStream(raw), providers, httpHeaders, type, type, new Annotation[] {});
    } catch (MinnalInstrumentationException e) {
        logger.trace("Failed while getting the content from the request stream", e);
        Throwable ex = e;
        while (ex.getCause() != null) {
            if (ex.getCause() instanceof IOException) {
                return getContent(new ByteArrayInputStream(raw), providers, httpHeaders, List.class, listType(type).getType(), new Annotation[]{});
            }
            ex = ex.getCause();
        }
        throw e;
    }
}

@Test
public void shouldGetContentAsList() throws Exception {
    List<String> list = Lists.newArrayList("test1", "test2", "test3");
    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(String.class), eq(String.class), eq(new Annotation[]{}), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenThrow(IOException.class);
    when(reader.readFrom(eq(List.class), any(Type.class), eq(new Annotation[]{}), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(list);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(String.class, String.class, new Annotation[]{}, mediaType)).thenReturn(reader);
    when(providers.getMessageBodyReader(List.class, ResourceUtil.listType(String.class).getType(), new Annotation[]{}, mediaType)).thenReturn(reader);
    Object content = ResourceUtil.getContent(bytes, providers, httpHeaders, String.class);
    assertTrue(content instanceof List);
    assertEquals(content, list);
}

@Test
public void shouldGetContentAsMap() throws Exception {
    Map<String, Object> map = new HashMap<String, Object>();
    map.put("key1", "value1");
    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), eq(new Annotation[]{}), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(map);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, new Annotation[]{}, mediaType)).thenReturn(reader);
    Object content = ResourceUtil.getContent(bytes, providers, httpHeaders, Map.class);
    assertTrue(content instanceof Map);
    assertEquals(content, map);
}

@Test
public void shouldInvokeMethodWithArguments() throws Throwable {
    Map<String, Object> content = new HashMap<String, Object>();
    content.put("value", "test123");
    content.put("someNumber", 1L);
    Map<String, Object> values = new HashMap<String, Object>();
    DummyModel model = new DummyModel();

    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), isNull(Annotation[].class), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(content);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, null, mediaType)).thenReturn(reader);

    assertEquals(ResourceUtil.invokeAction(model, "dummyActionWithArguments", Lists.newArrayList(new ParameterMetaData("value", "value", String.class), 
            new ParameterMetaData("someNumber", "someNumber", Long.class)), bytes, providers, httpHeaders, values), "dummyActionWithArguments");
}

@Test
public void shouldInvokeMethodWithArgumentsAndModel() throws Throwable {
    Map<String, Object> content = new HashMap<String, Object>();
    content.put("value", "test123");
    content.put("someNumber", 1L);
    Map<String, Object> values = new HashMap<String, Object>();
    values.put("anotherModel", new DummyModel());
    DummyModel model = new DummyModel();

    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), isNull(Annotation[].class), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(content);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, null, mediaType)).thenReturn(reader);

    assertEquals(ResourceUtil.invokeAction(model, "dummyActionWithArgumentsAndModel", Lists.newArrayList(new ParameterMetaData("anotherModel", "anotherModel", DummyModel.class),
            new ParameterMetaData("value", "value", String.class), new ParameterMetaData("someNumber", "someNumber", Long.class)), bytes, providers, httpHeaders, values), "dummyActionWithArgumentsAndModel");
}

@Test(expectedExceptions=MinnalInstrumentationException.class)
public void shouldThrowExceptionIfMethodNotFound() throws Throwable {
    Map<String, Object> values = new HashMap<String, Object>();
    DummyModel model = new DummyModel();

    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), isNull(Annotation[].class), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(values);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, null, mediaType)).thenReturn(reader);

    ResourceUtil.invokeAction(model, "nonExistingMethod", Lists.newArrayList(new ParameterMetaData("anotherModel", "anotherModel", DummyModel.class)), bytes, providers, httpHeaders, values);
}

@Test(expectedExceptions=IllegalStateException.class)
public void shouldThrowExceptionIfMethodThrowsAnyException() throws Throwable {
    Map<String, Object> values = new HashMap<String, Object>();
    DummyModel model = new DummyModel();

    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), isNull(Annotation[].class), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(values);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, null, mediaType)).thenReturn(reader);

    ResourceUtil.invokeAction(model, "throwsException", new ArrayList<ParameterMetaData>(), bytes, providers, httpHeaders, values);
}

private static Set<Class<?>> contextClasses() {
    final Set<Class<?>> classes = new HashSet<>(); classes.add(UriInfo.class);
    classes.add(SecurityContext.class);
    classes.add(HttpHeaders.class);
    classes.add(ContextResolver.class);
    classes.add(Providers.class);
    classes.add(Request.class);
    /* TODO: when we have jaxrs 2
    classes.add(ResourceInfo.class);
    classes.add(ResourceContext.class);
    */
    classes.add(Application.class);
    classes.add(HttpServletRequest.class);
    classes.add(HttpServletResponse.class);
    classes.add(ServletConfig.class);
    classes.add(ServletContext.class);
    classes.add(MessageContext.class);
    return classes;
}

/**
 * Public ctor.
 */
public ResourceMocker() {
    final URI home = URI.create("http://localhost:9999/local");
    this.withUriInfo(new UriInfoMocker().withRequestUri(home).mock());
    final HttpServletRequest request =
        Mockito.mock(HttpServletRequest.class);
    Mockito.doReturn(home.getHost()).when(request).getRemoteAddr();
    Mockito.doReturn(home.getPath()).when(request).getRequestURI();
    Mockito.doReturn(home.getPath()).when(request).getContextPath();
    this.withServletRequest(request);
    this.withHttpHeaders(new HttpHeadersMocker().mock());
    final Providers providers = Mockito.mock(Providers.class);
    Mockito.doReturn(new XslResolver())
        .when(providers)
        .getContextResolver(
            Marshaller.class, MediaType.APPLICATION_XML_TYPE
        );
    this.withProviders(providers);
    final SecurityContext security = Mockito.mock(SecurityContext.class);
    this.withSecurityContext(security);
    this.withServletContext(new MkServletContext());
}

/**
 * BaseResource can set and return context elements.
 * @throws Exception If there is some problem inside
 */
@Test
public void setsAndReturnsContextElements() throws Exception {
    final BaseResource res = new BaseResourceTest.FooResource();
    final Providers provs = Mockito.mock(Providers.class);
    res.setProviders(provs);
    MatcherAssert.assertThat(res.providers(), Matchers.equalTo(provs));
    final HttpHeaders headers = Mockito.mock(HttpHeaders.class);
    res.setHttpHeaders(headers);
    MatcherAssert.assertThat(res.httpHeaders(), Matchers.equalTo(headers));
    final HttpServletRequest req = Mockito.mock(HttpServletRequest.class);
    res.setHttpServletRequest(req);
    MatcherAssert.assertThat(
        res.httpServletRequest(),
        Matchers.equalTo(req)
    );
    final SecurityContext sctx = Mockito.mock(SecurityContext.class);
    res.setSecurityContext(sctx);
    MatcherAssert.assertThat(res.securityContext(), Matchers.equalTo(sctx));
    final ServletContext vctx = Mockito.mock(ServletContext.class);
    res.setServletContext(vctx);
    MatcherAssert.assertThat(res.servletContext(), Matchers.equalTo(vctx));
}

@SuppressWarnings("unchecked")
public static MimeBodyPart createBodyPart(Providers providers, SMIMEOutput out) throws IOException, MessagingException {
    ByteArrayOutputStream bodyOs = new ByteArrayOutputStream();
    MessageBodyWriter writer = providers.getMessageBodyWriter(out.getType(), out.getGenericType(), null, out.getMediaType());

    if (writer == null) {
        throw new RuntimeException("Failed to find writer for type: " + out.getType().getName());
    }

    MultivaluedMap<String, String> bodyHeaders = new MultivaluedHashMap<String, String>();
    bodyHeaders.add("Content-Type", out.getMediaType().toString());
    writer.writeTo(out.getEntity(), out.getType(), out.getGenericType(), null, out.getMediaType(), bodyHeaders, bodyOs);


    InternetHeaders ih = new InternetHeaders();

    for (Map.Entry<String, List<String>> entry : bodyHeaders.entrySet()) {
        for (String value : entry.getValue()) {
            ih.addHeader(entry.getKey(), value);
        }
    }
    return new MimeBodyPart(ih, bodyOs.toByteArray());
}

private static final Prop buildProp(final FileOutVO f, final Providers providers) {
    return new Prop(new GetETag(String.valueOf(f.getVersion())),
            new DisplayName(f.getFileName()), // format("%s %s", c.getLastName(), c.getFirstName())),
            new GetLastModified(f.getModifiedTimestamp()),
            new GetContentLength(f.getSize()),
            new GetContentType(f.getContentType().getMimeType()));
}

protected javax.ws.rs.core.Response davPropPatch(InputStream body, UriInfo uriInfo, Providers providers, HttpHeaders httpHeaders) throws IOException {
    final PropertyUpdate propertyUpdate = providers.getMessageBodyReader(PropertyUpdate.class, PropertyUpdate.class, new Annotation[0],
            APPLICATION_XML_TYPE).readFrom(PropertyUpdate.class, PropertyUpdate.class, new Annotation[0], APPLICATION_XML_TYPE,
                    httpHeaders.getRequestHeaders(), body);
    // System.out.println("PATCH PROPERTIES: " + propertyUpdate.list());
    /* TODO Patch properties in database. */
    final Collection<PropStat> propstats = new LinkedList<PropStat>();
    for (final RemoveOrSet removeOrSet : propertyUpdate.list()) {
        propstats.add(new PropStat(removeOrSet.getProp(), new Status((StatusType) FORBIDDEN)));
    }
    return javax.ws.rs.core.Response.status(MULTI_STATUS)
            .entity(new MultiStatus(new Response(new HRef(uriInfo.getRequestUri()), null, null, null, propstats))).build();
}

@Test
public void testLocateGensonContextResolver() {
    Providers providers = instance(Providers.class);

    RuntimeDelegate.setInstance(new DefaultRuntimeDelegate());

    ContextResolver contextResolver = providers.getContextResolver(Genson.class, MediaType.APPLICATION_JSON_TYPE);

    assertNotNull(contextResolver);
    assertEquals(TestGensonContextResolver3.class, contextResolver.getClass());
}

@Test
public void testLocateObjectContextResolver() {
    Providers providers = instance(Providers.class);

    RuntimeDelegate.setInstance(new DefaultRuntimeDelegate());

    ContextResolver contextResolver = providers.getContextResolver(Person.class, MediaType.APPLICATION_JSON_TYPE);

    assertNotNull(contextResolver);
    assertEquals(TestGensonContextResolver6.class, contextResolver.getClass());
}

@Test
public void testLocateApplicationContextResolver() {
    Providers providers = instance(Providers.class);

    RuntimeDelegate.setInstance(new DefaultRuntimeDelegate());

    ContextResolver contextResolver = providers.getContextResolver(Application.class, MediaType.APPLICATION_JSON_TYPE);

    assertNotNull(contextResolver);
    assertEquals(TestApplicationContextResolver.class, contextResolver.getClass());
}

public RestEasyRequestContext(Providers providers, HttpRequest request) {
    super(providers,
            new RequestPac4JSecurityContext(ResteasyProviderFactory.getContextData(SecurityContext.class)).context()
                    // if we went through a pac4j security filter
                    .map(sc -> sc.getContext().getRequestContext())
                    // if not, we create a new ContainerRequestContext
                    .orElse(new PreMatchContainerRequestContext(request)));
}

public static <T> T getEntity(ClientMessage msg, Class<T> type, Type genericType, ResteasyProviderFactory factory) {
   int size = msg.getBodySize();
   if (size <= 0)
      return null;

   byte[] body = new byte[size];
   msg.getBodyBuffer().readBytes(body);

   String contentType = msg.getStringProperty(HttpHeaderProperty.CONTENT_TYPE);
   if (contentType == null) {
      throw new UnknownMediaType("Message did not have a Content-Type header cannot extract entity");
   }
   MediaType ct = MediaType.valueOf(contentType);
   MessageBodyReader<T> reader = factory.getMessageBodyReader(type, genericType, null, ct);
   if (reader == null) {
      throw new UnmarshalException("Unable to find a JAX-RS reader for type " + type.getName() + " and media type " + contentType);
   }

   Providers current = ResteasyProviderFactory.getContextData(Providers.class);
   ResteasyProviderFactory.pushContext(Providers.class, factory);
   try {
      return reader.readFrom(type, genericType, null, ct, new Headers<String>(), new ByteArrayInputStream(body));
   } catch (IOException e) {
      throw new RuntimeException(e);
   } finally {
      ResteasyProviderFactory.popContextData(Providers.class);
      if (current != null)
         ResteasyProviderFactory.pushContext(Providers.class, current);
   }
}

@Inject
public ProvidesResource(DaggerContainer daggerContainer, WebApplication webApplication, Providers providers,
                        FeaturesAndProperties featuresAndProperties, MessageBodyWorkers messageBodyWorkers,
                        ExceptionMapperContext exceptionMapperContext, ResourceContext resourceContext) {
    assertNotNull(daggerContainer);
    assertNotNull(webApplication);
    assertNotNull(providers);
    assertNotNull(featuresAndProperties);
    assertNotNull(messageBodyWorkers);
    assertNotNull(exceptionMapperContext);
    assertNotNull(resourceContext);
}

@Override
protected void configure() {

  Provider<Injector> injector = getProvider(Injector.class);
  bind(ServiceLocator.class).toProvider(new ServiceLocatorProvider(injector, locator))
    .in(Singleton.class);

  Provider<ServiceLocator> provider = getProvider(ServiceLocator.class);

  bind(Application.class)
    .toProvider(new JerseyProvider<>(provider, Application.class));

  bind(Providers.class)
    .toProvider(new JerseyProvider<>(provider, Providers.class));

  bind(UriInfo.class)
    .toProvider(new JerseyProvider<>(provider, UriInfo.class))
    .in(RequestScoped.class);

  bind(HttpHeaders.class)
    .toProvider(new JerseyProvider<>(provider, HttpHeaders.class))
    .in(RequestScoped.class);

  bind(SecurityContext.class)
    .toProvider(new JerseyProvider<>(provider, SecurityContext.class))
    .in(RequestScoped.class);

  bind(Request.class)
    .toProvider(new JerseyProvider<>(provider, Request.class))
    .in(RequestScoped.class);
}

public static SpearalFactory locateFactory(Configuration configuration, Providers providers) {
    ContextResolver<SpearalFactory> resolver = providers.getContextResolver(SpearalFactory.class, APPLICATION_SPEARAL_TYPE);
    if (resolver != null)
        return resolver.getContext(SpearalFactory.class);

    for (Object instance : configuration.getInstances()) {
        if (instance instanceof SpearalFactory)
            return (SpearalFactory)instance;
    }

    throw new RuntimeException("Could not locate SpearalFactory in JAX-RS context");
}

@Test
public void shouldInvokeMethodWithNoArguments() throws Throwable {
    Map<String, Object> values = new HashMap<String, Object>();
    DummyModel model = new DummyModel();
    byte[] bytes = new byte[10];
    MediaType mediaType = mock(MediaType.class);
    HttpHeaders httpHeaders = mock(HttpHeaders.class);
    when(httpHeaders.getMediaType()).thenReturn(mediaType);
    MessageBodyReader reader = mock(MessageBodyReader.class);
    when(reader.readFrom(eq(Map.class), eq(Map.class), isNull(Annotation[].class), eq(mediaType), isNull(MultivaluedMap.class), any(InputStream.class))).thenReturn(values);
    Providers providers = mock(Providers.class);
    when(providers.getMessageBodyReader(Map.class, Map.class, null, mediaType)).thenReturn(reader);

    assertEquals(ResourceUtil.invokeAction(model, "dummyAction", new ArrayList<ParameterMetaData>(), bytes, providers, httpHeaders, values), "dummy");
}

protected GedcomxXmlProvider(Providers ps, MediaType mt, Class<?> instanceClass, QName qName) {
  super(ps);
  this.rootClass = Gedcomx.class;
  this.mt = mt;
  this.qName = qName;
  this.instanceClass = instanceClass == null ? this.rootClass : instanceClass;
}

public static Object findThreadLocal(final Class<?> type) {
    if (Request.class.equals(type)) {
        return REQUEST;
    } else if (UriInfo.class.equals(type)) {
        return URI_INFO;
    } else if (HttpHeaders.class.equals(type)) {
        return HTTP_HEADERS;
    } else if (SecurityContext.class.equals(type)) {
        return SECURITY_CONTEXT;
    } else if (ContextResolver.class.equals(type)) {
        return CONTEXT_RESOLVER;
    } else if (Providers.class.equals(type)) {
        return PROVIDERS;
    } else if (ServletRequest.class.equals(type)) {
        return SERVLET_REQUEST;
    } else if (HttpServletRequest.class.equals(type)) {
        return HTTP_SERVLET_REQUEST;
    } else if (HttpServletResponse.class.equals(type)) {
        return HTTP_SERVLET_RESPONSE;
    } else if (ServletConfig.class.equals(type)) {
        return SERVLET_CONFIG;
    } else if (ServletContext.class.equals(type)) {
        return SERVLET_CONTEXT;
    } else if (ResourceInfo.class.equals(type)) {
        return RESOURCE_INFO;
    } else if (ResourceContext.class.equals(type)) {
        return RESOURCE_CONTEXT;
    } else if (Application.class.equals(type)) {
        return APPLICATION;
    } else if (Configuration.class.equals(type)) {
        return CONFIGURATION;
    }
    return null;
}

@Override
@NotNull
public final Providers providers() {
    this.assertNotNull(
        this.iproviders,
        "%[type]s#providers was never injected by JAX-RS"
    );
    return this.iproviders;
}

public static <T> T resolveFromContext(Providers providers, Class<T> clazz, MediaType mediaType, Class<?> type) {
  ContextResolver<T> contextResolver = providers.getContextResolver(clazz, mediaType);

  if (contextResolver == null) {
    throw new RestException("No context resolver found for class " + clazz.getName());
  }

  return contextResolver.getContext(type);
}