org.springframework.context.EnvironmentAware#org.springframework.core.annotation.AnnotationAwareOrderComparator源码实例Demo

public void init()
{
    List<FeatureIndexingSupport> fsp = new ArrayList<>();

    if (indexingSupportsProxy != null) {
        fsp.addAll(indexingSupportsProxy);
        AnnotationAwareOrderComparator.sort(fsp);
    
        for (FeatureIndexingSupport fs : fsp) {
            log.info("Found indexing support: {}",
                    ClassUtils.getAbbreviatedName(fs.getClass(), 20));
        }
    }
    
    indexingSupports = Collections.unmodifiableList(fsp);
}
 

protected void initStrategies(ApplicationContext context) {
	Map<String, HandlerMapping> mappingBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
			context, HandlerMapping.class, true, false);

	ArrayList<HandlerMapping> mappings = new ArrayList<>(mappingBeans.values());
	AnnotationAwareOrderComparator.sort(mappings);
	this.handlerMappings = Collections.unmodifiableList(mappings);

	Map<String, HandlerAdapter> adapterBeans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
			context, HandlerAdapter.class, true, false);

	this.handlerAdapters = new ArrayList<>(adapterBeans.values());
	AnnotationAwareOrderComparator.sort(this.handlerAdapters);

	Map<String, HandlerResultHandler> beans = BeanFactoryUtils.beansOfTypeIncludingAncestors(
			context, HandlerResultHandler.class, true, false);

	this.resultHandlers = new ArrayList<>(beans.values());
	AnnotationAwareOrderComparator.sort(this.resultHandlers);
}
 

@Override
protected void initServletContext(ServletContext servletContext) {
	Collection<ViewResolver> matchingBeans =
			BeanFactoryUtils.beansOfTypeIncludingAncestors(obtainApplicationContext(), ViewResolver.class).values();
	if (this.viewResolvers == null) {
		this.viewResolvers = new ArrayList<>(matchingBeans.size());
		for (ViewResolver viewResolver : matchingBeans) {
			if (this != viewResolver) {
				this.viewResolvers.add(viewResolver);
			}
		}
	}
	else {
		for (int i = 0; i < this.viewResolvers.size(); i++) {
			ViewResolver vr = this.viewResolvers.get(i);
			if (matchingBeans.contains(vr)) {
				continue;
			}
			String name = vr.getClass().getName() + i;
			obtainApplicationContext().getAutowireCapableBeanFactory().initializeBean(vr, name);
		}

	}
	AnnotationAwareOrderComparator.sort(this.viewResolvers);
	this.cnmFactoryBean.setServletContext(servletContext);
}
 

public void init()
{
    List<E> extensions = new ArrayList<>();

    if (extensionsListProxy != null) {
        extensions.addAll(extensionsListProxy);
        AnnotationAwareOrderComparator.sort(extensions);
    
        for (E fs : extensions) {
            log.info("Found {} extension: {}", getClass().getSimpleName(),
                    getAbbreviatedName(fs.getClass(), 20));
        }
    }
    
    extensionsList = Collections.unmodifiableList(extensions);
}
 

/**
 * Create {@link PropertySource}s given {@link Environment} from the property
 * configuration.
 * @param environment must not be {@literal null}.
 * @return a {@link List} of ordered {@link PropertySource}s.
 */
protected List<PropertySource<?>> doCreatePropertySources(Environment environment) {

	Collection<SecretBackendMetadata> secretBackends = this.propertySourceLocatorConfiguration
			.getSecretBackends();
	List<SecretBackendMetadata> sorted = new ArrayList<>(secretBackends);
	List<PropertySource<?>> propertySources = new ArrayList<>();

	AnnotationAwareOrderComparator.sort(sorted);

	propertySources.addAll(doCreateKeyValuePropertySources(environment));

	for (SecretBackendMetadata backendAccessor : sorted) {

		PropertySource<?> vaultPropertySource = createVaultPropertySource(
				backendAccessor);
		propertySources.add(vaultPropertySource);
	}

	return propertySources;
}
 

@Bean
@ConditionalOnMissingBean(JwtAccessTokenConverter.class)
public JwtAccessTokenConverter jwtTokenEnhancer() {
	JwtAccessTokenConverter converter = new JwtAccessTokenConverter();
	String keyValue = this.resource.getJwt().getKeyValue();
	if (!StringUtils.hasText(keyValue)) {
		keyValue = getKeyFromServer();
	}
	if (StringUtils.hasText(keyValue) && !keyValue.startsWith("-----BEGIN")) {
		converter.setSigningKey(keyValue);
	}
	if (keyValue != null) {
		converter.setVerifierKey(keyValue);
	}
	if (!CollectionUtils.isEmpty(this.configurers)) {
		AnnotationAwareOrderComparator.sort(this.configurers);
		for (JwtAccessTokenConverterConfigurer configurer : this.configurers) {
			configurer.configure(converter);
		}
	}
	return converter;
}
 

/**
 * Customize the {@link ConfigurableWebApplicationContext} created by this
 * ContextLoader after config locations have been supplied to the context
 * but before the context is <em>refreshed</em>.
 * <p>The default implementation {@linkplain #determineContextInitializerClasses(ServletContext)
 * determines} what (if any) context initializer classes have been specified through
 * {@linkplain #CONTEXT_INITIALIZER_CLASSES_PARAM context init parameters} and
 * {@linkplain ApplicationContextInitializer#initialize invokes each} with the
 * given web application context.
 * <p>Any {@code ApplicationContextInitializers} implementing
 * {@link org.springframework.core.Ordered Ordered} or marked with @{@link
 * org.springframework.core.annotation.Order Order} will be sorted appropriately.
 * @param sc the current servlet context
 * @param wac the newly created application context
 * @see #CONTEXT_INITIALIZER_CLASSES_PARAM
 * @see ApplicationContextInitializer#initialize(ConfigurableApplicationContext)
 */
protected void customizeContext(ServletContext sc, ConfigurableWebApplicationContext wac) {
	List<Class<ApplicationContextInitializer<ConfigurableApplicationContext>>> initializerClasses =
			determineContextInitializerClasses(sc);

	for (Class<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null && !initializerContextClass.isInstance(wac)) {
			throw new ApplicationContextException(String.format(
					"Could not apply context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"context loader: [%s]", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		this.contextInitializers.add(BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(this.contextInitializers);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : this.contextInitializers) {
		initializer.initialize(wac);
	}
}
 

@Test
public void testGenericMatchingWithUnresolvedOrderedStream() {
	DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
	bf.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
	bf.setAutowireCandidateResolver(new GenericTypeAwareAutowireCandidateResolver());

	RootBeanDefinition bd1 = new RootBeanDefinition(NumberStoreFactory.class);
	bd1.setFactoryMethodName("newDoubleStore");
	bf.registerBeanDefinition("store1", bd1);
	RootBeanDefinition bd2 = new RootBeanDefinition(NumberStoreFactory.class);
	bd2.setFactoryMethodName("newFloatStore");
	bf.registerBeanDefinition("store2", bd2);

	ObjectProvider<NumberStore<?>> numberStoreProvider = bf.getBeanProvider(ResolvableType.forClass(NumberStore.class));
	List<NumberStore<?>> resolved = numberStoreProvider.orderedStream().collect(Collectors.toList());
	assertEquals(2, resolved.size());
	assertSame(bf.getBean("store2"), resolved.get(0));
	assertSame(bf.getBean("store1"), resolved.get(1));
}
 

@Test
public void testAutowireBeanByTypeWithIdenticalPriorityCandidates() {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	lbf.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
	RootBeanDefinition bd = new RootBeanDefinition(HighPriorityTestBean.class);
	RootBeanDefinition bd2 = new RootBeanDefinition(HighPriorityTestBean.class);
	lbf.registerBeanDefinition("test", bd);
	lbf.registerBeanDefinition("spouse", bd2);

	try {
		lbf.autowire(DependenciesBean.class, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
		fail("Should have thrown UnsatisfiedDependencyException");
	}
	catch (UnsatisfiedDependencyException ex) {
		// expected
		assertNotNull("Exception should have cause", ex.getCause());
		assertEquals("Wrong cause type", NoUniqueBeanDefinitionException.class, ex.getCause().getClass());
		assertTrue(ex.getMessage().contains("5"));  // conflicting priority
	}
}
 

void init()
{
    List<ExternalSearchProviderFactory> exts = new ArrayList<>();

    if (providersProxy != null) {
        exts.addAll(providersProxy);
        AnnotationAwareOrderComparator.sort(exts);

        for (ExternalSearchProviderFactory fs : exts) {
            log.info("Found external search provider: {}",
                    ClassUtils.getAbbreviatedName(fs.getClass(), 20));
        }
    }

    providers = Collections.unmodifiableList(exts);
}
 

void init()
{
    List<PhysicalIndexFactory> exts = new ArrayList<>();

    if (extensionsProxy != null) {
        exts.addAll(extensionsProxy);
        AnnotationAwareOrderComparator.sort(exts);
    
        for (PhysicalIndexFactory fs : exts) {
            log.info("Found index extension: {}",
                    ClassUtils.getAbbreviatedName(fs.getClass(), 20));
        }
    }
    
    extensions = Collections.unmodifiableList(exts);
}
 

public void init()
{
    List<LayerSupport> lsp = new ArrayList<>();

    if (layerSupportsProxy != null) {
        lsp.addAll(layerSupportsProxy);
        AnnotationAwareOrderComparator.sort(lsp);
    
        for (LayerSupport<?, ?> fs : lsp) {
            log.info("Found layer support: {}",
                    ClassUtils.getAbbreviatedName(fs.getClass(), 20));
            fs.setLayerSupportRegistry(this);
        }
    }
    
    layerSupports = Collections.unmodifiableList(lsp);
}
 

@Test
public void testConstructorResourceInjectionWithMultipleOrderedCandidates() {
	DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
	bf.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
	AutowiredAnnotationBeanPostProcessor bpp = new AutowiredAnnotationBeanPostProcessor();
	bpp.setBeanFactory(bf);
	bf.addBeanPostProcessor(bpp);
	bf.registerBeanDefinition("annotatedBean", new RootBeanDefinition(ConstructorsResourceInjectionBean.class));
	TestBean tb = new TestBean();
	bf.registerSingleton("testBean", tb);
	FixedOrder2NestedTestBean ntb1 = new FixedOrder2NestedTestBean();
	bf.registerSingleton("nestedTestBean1", ntb1);
	FixedOrder1NestedTestBean ntb2 = new FixedOrder1NestedTestBean();
	bf.registerSingleton("nestedTestBean2", ntb2);

	ConstructorsResourceInjectionBean bean = (ConstructorsResourceInjectionBean) bf.getBean("annotatedBean");
	assertNull(bean.getTestBean3());
	assertSame(tb, bean.getTestBean4());
	assertEquals(2, bean.getNestedTestBeans().length);
	assertSame(ntb2, bean.getNestedTestBeans()[0]);
	assertSame(ntb1, bean.getNestedTestBeans()[1]);
	bf.destroySingletons();
}
 

/**
 * Load and instantiate the factory implementations of the given type from
 * {@value #FACTORIES_RESOURCE_LOCATION}, using the given class loader.
 * <p>The returned factories are sorted through {@link AnnotationAwareOrderComparator}.
 * <p>If a custom instantiation strategy is required, use {@link #loadFactoryNames}
 * to obtain all registered factory names.
 * @param factoryClass the interface or abstract class representing the factory
 * @param classLoader the ClassLoader to use for loading (can be {@code null} to use the default)
 * @throws IllegalArgumentException if any factory implementation class cannot
 * be loaded or if an error occurs while instantiating any factory
 * @see #loadFactoryNames
 */
public static <T> List<T> loadFactories(Class<T> factoryClass, @Nullable ClassLoader classLoader) {
	Assert.notNull(factoryClass, "'factoryClass' must not be null");
	ClassLoader classLoaderToUse = classLoader;
	if (classLoaderToUse == null) {
		classLoaderToUse = SpringFactoriesLoader.class.getClassLoader();
	}
	List<String> factoryNames = loadFactoryNames(factoryClass, classLoaderToUse);
	if (logger.isTraceEnabled()) {
		logger.trace("Loaded [" + factoryClass.getName() + "] names: " + factoryNames);
	}
	List<T> result = new ArrayList<>(factoryNames.size());
	for (String factoryName : factoryNames) {
		result.add(instantiateFactory(factoryName, factoryClass, classLoaderToUse));
	}
	AnnotationAwareOrderComparator.sort(result);
	return result;
}
 

/**
 * Return an unmodifiable snapshot list of all registered synchronizations
 * for the current thread.
 * @return unmodifiable List of TransactionSynchronization instances
 * @throws IllegalStateException if synchronization is not active
 * @see TransactionSynchronization
 */
public static List<TransactionSynchronization> getSynchronizations() throws IllegalStateException {
	Set<TransactionSynchronization> synchs = synchronizations.get();
	if (synchs == null) {
		throw new IllegalStateException("Transaction synchronization is not active");
	}
	// Return unmodifiable snapshot, to avoid ConcurrentModificationExceptions
	// while iterating and invoking synchronization callbacks that in turn
	// might register further synchronizations.
	if (synchs.isEmpty()) {
		return Collections.emptyList();
	}
	else {
		// Sort lazily here, not in registerSynchronization.
		List<TransactionSynchronization> sortedSynchs = new ArrayList<>(synchs);
		AnnotationAwareOrderComparator.sort(sortedSynchs);
		return Collections.unmodifiableList(sortedSynchs);
	}
}
 

@Override
protected void initServletContext(ServletContext servletContext) {
	Collection<ViewResolver> matchingBeans =
			BeanFactoryUtils.beansOfTypeIncludingAncestors(obtainApplicationContext(), ViewResolver.class).values();
	if (this.viewResolvers == null) {
		this.viewResolvers = new ArrayList<>(matchingBeans.size());
		for (ViewResolver viewResolver : matchingBeans) {
			if (this != viewResolver) {
				this.viewResolvers.add(viewResolver);
			}
		}
	}
	else {
		for (int i = 0; i < this.viewResolvers.size(); i++) {
			ViewResolver vr = this.viewResolvers.get(i);
			if (matchingBeans.contains(vr)) {
				continue;
			}
			String name = vr.getClass().getName() + i;
			obtainApplicationContext().getAutowireCapableBeanFactory().initializeBean(vr, name);
		}

	}
	AnnotationAwareOrderComparator.sort(this.viewResolvers);
	this.cnmFactoryBean.setServletContext(servletContext);
}
 

public RelationAdapter(LayerSupportRegistry aLayerSupportRegistry,
        FeatureSupportRegistry aFeatureSupportRegistry,
        ApplicationEventPublisher aEventPublisher, AnnotationLayer aLayer,
        String aTargetFeatureName, String aSourceFeatureName,
        Supplier<Collection<AnnotationFeature>> aFeatures,
        List<RelationLayerBehavior> aBehaviors)
{
    super(aLayerSupportRegistry, aFeatureSupportRegistry, aEventPublisher, aLayer, aFeatures);
    
    if (aBehaviors == null) {
        behaviors = emptyList();
    }
    else {
        List<RelationLayerBehavior> temp = new ArrayList<>(aBehaviors);
        AnnotationAwareOrderComparator.sort(temp);
        behaviors = temp;
    }
    
    sourceFeatureName = aSourceFeatureName;
    targetFeatureName = aTargetFeatureName;
}
 

@Override
public String[] selectImports(AnnotationMetadata annotationMetadata) {
	ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
	// Use names and ensure unique to protect against duplicates
	List<String> names = new ArrayList<>(SpringFactoriesLoader
			.loadFactoryNames(BootstrapConfiguration.class, classLoader));
	names.addAll(Arrays.asList(StringUtils.commaDelimitedListToStringArray(
			this.environment.getProperty("spring.cloud.bootstrap.sources", ""))));

	List<OrderedAnnotatedElement> elements = new ArrayList<>();
	for (String name : names) {
		try {
			elements.add(
					new OrderedAnnotatedElement(this.metadataReaderFactory, name));
		}
		catch (IOException e) {
			continue;
		}
	}
	AnnotationAwareOrderComparator.sort(elements);

	String[] classNames = elements.stream().map(e -> e.name).toArray(String[]::new);

	return classNames;
}
 

public void init()
{
    List<StatementColoringStrategy> fsp = new ArrayList<>();

    if (statementColoringStrategiesProxy != null) {
        fsp.addAll(statementColoringStrategiesProxy);
        AnnotationAwareOrderComparator.sort(fsp);

        for (StatementColoringStrategy fs : fsp) {
            log.info("Found value type support: {}",
                ClassUtils.getAbbreviatedName(fs.getClass(), 20));
        }
    }

    statementColoringStrategies = Collections.unmodifiableList(fsp);
}
 

/**
 * Customize the {@link ConfigurableWebApplicationContext} created by this
 * ContextLoader after config locations have been supplied to the context
 * but before the context is <em>refreshed</em>.
 * <p>The default implementation {@linkplain #determineContextInitializerClasses(ServletContext)
 * determines} what (if any) context initializer classes have been specified through
 * {@linkplain #CONTEXT_INITIALIZER_CLASSES_PARAM context init parameters} and
 * {@linkplain ApplicationContextInitializer#initialize invokes each} with the
 * given web application context.
 * <p>Any {@code ApplicationContextInitializers} implementing
 * {@link org.springframework.core.Ordered Ordered} or marked with @{@link
 * org.springframework.core.annotation.Order Order} will be sorted appropriately.
 * @param sc the current servlet context
 * @param wac the newly created application context
 * @see #CONTEXT_INITIALIZER_CLASSES_PARAM
 * @see ApplicationContextInitializer#initialize(ConfigurableApplicationContext)
 */
protected void customizeContext(ServletContext sc, ConfigurableWebApplicationContext wac) {
	List<Class<ApplicationContextInitializer<ConfigurableApplicationContext>>> initializerClasses =
			determineContextInitializerClasses(sc);

	for (Class<ApplicationContextInitializer<ConfigurableApplicationContext>> initializerClass : initializerClasses) {
		Class<?> initializerContextClass =
				GenericTypeResolver.resolveTypeArgument(initializerClass, ApplicationContextInitializer.class);
		if (initializerContextClass != null) {
			Assert.isAssignable(initializerContextClass, wac.getClass(), String.format(
					"Could not add context initializer [%s] since its generic parameter [%s] " +
					"is not assignable from the type of application context used by this " +
					"context loader [%s]: ", initializerClass.getName(), initializerContextClass.getName(),
					wac.getClass().getName()));
		}
		this.contextInitializers.add(BeanUtils.instantiateClass(initializerClass));
	}

	AnnotationAwareOrderComparator.sort(this.contextInitializers);
	for (ApplicationContextInitializer<ConfigurableApplicationContext> initializer : this.contextInitializers) {
		initializer.initialize(wac);
	}
}
 

@Test
public void testMapInjectionWithPriority() {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	lbf.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
	RootBeanDefinition bd1 = new RootBeanDefinition(HighPriorityTestBean.class);
	RootBeanDefinition bd2 = new RootBeanDefinition(LowPriorityTestBean.class);
	RootBeanDefinition bd3 = new RootBeanDefinition(NullTestBeanFactoryBean.class);
	RootBeanDefinition bd4 = new RootBeanDefinition(TestBeanRecipient.class, RootBeanDefinition.AUTOWIRE_CONSTRUCTOR, false);
	lbf.registerBeanDefinition("bd1", bd1);
	lbf.registerBeanDefinition("bd2", bd2);
	lbf.registerBeanDefinition("bd3", bd3);
	lbf.registerBeanDefinition("bd4", bd4);
	lbf.preInstantiateSingletons();
	TestBean bean = lbf.getBean(TestBeanRecipient.class).testBean;
	assertThat(bean.getBeanName(), equalTo("bd1"));
}
 

/**
 * Add all {@link Advisor Advisors} from the supplied {@link MetadataAwareAspectInstanceFactory}
 * to the current chain. Exposes any special purpose {@link Advisor Advisors} if needed.
 * @see AspectJProxyUtils#makeAdvisorChainAspectJCapableIfNecessary(List)
 */
private void addAdvisorsFromAspectInstanceFactory(MetadataAwareAspectInstanceFactory instanceFactory) {
	List<Advisor> advisors = this.aspectFactory.getAdvisors(instanceFactory);
	Class<?> targetClass = getTargetClass();
	Assert.state(targetClass != null, "Unresolvable target class");
	advisors = AopUtils.findAdvisorsThatCanApply(advisors, targetClass);
	AspectJProxyUtils.makeAdvisorChainAspectJCapableIfNecessary(advisors);
	AnnotationAwareOrderComparator.sort(advisors);
	addAdvisors(advisors);
}
 

@Test
public void testInterfaceProxiesCanBeOrderedThroughAnnotations() {
	Object proxy1 = new ProxyFactory(new A()).getProxy();
	Object proxy2 = new ProxyFactory(new B()).getProxy();
	List<Object> list = new ArrayList<>(2);
	list.add(proxy1);
	list.add(proxy2);
	AnnotationAwareOrderComparator.sort(list);
	assertSame(proxy2, list.get(0));
	assertSame(proxy1, list.get(1));
}
 

@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
	this.beanFactory = beanFactory;

	Map<String, EventListenerFactory> beans = beanFactory.getBeansOfType(EventListenerFactory.class, false, false);
	List<EventListenerFactory> factories = new ArrayList<>(beans.values());
	AnnotationAwareOrderComparator.sort(factories);
	this.eventListenerFactories = factories;
}
 

/**
 * Delegate the {@code ServletContext} to any {@link WebApplicationInitializer}
 * implementations present on the application classpath.
 * <p>Because this class declares @{@code HandlesTypes(WebApplicationInitializer.class)},
 * Servlet 3.0+ containers will automatically scan the classpath for implementations
 * of Spring's {@code WebApplicationInitializer} interface and provide the set of all
 * such types to the {@code webAppInitializerClasses} parameter of this method.
 * <p>If no {@code WebApplicationInitializer} implementations are found on the classpath,
 * this method is effectively a no-op. An INFO-level log message will be issued notifying
 * the user that the {@code ServletContainerInitializer} has indeed been invoked but that
 * no {@code WebApplicationInitializer} implementations were found.
 * <p>Assuming that one or more {@code WebApplicationInitializer} types are detected,
 * they will be instantiated (and <em>sorted</em> if the @{@link
 * org.springframework.core.annotation.Order @Order} annotation is present or
 * the {@link org.springframework.core.Ordered Ordered} interface has been
 * implemented). Then the {@link WebApplicationInitializer#onStartup(ServletContext)}
 * method will be invoked on each instance, delegating the {@code ServletContext} such
 * that each instance may register and configure servlets such as Spring's
 * {@code DispatcherServlet}, listeners such as Spring's {@code ContextLoaderListener},
 * or any other Servlet API componentry such as filters.
 * @param webAppInitializerClasses all implementations of
 * {@link WebApplicationInitializer} found on the application classpath
 * @param servletContext the servlet context to be initialized
 * @see WebApplicationInitializer#onStartup(ServletContext)
 * @see AnnotationAwareOrderComparator
 */
@Override
public void onStartup(Set<Class<?>> webAppInitializerClasses, ServletContext servletContext)
		throws ServletException {

	List<WebApplicationInitializer> initializers = new LinkedList<WebApplicationInitializer>();

	if (webAppInitializerClasses != null) {
		for (Class<?> waiClass : webAppInitializerClasses) {
			// Be defensive: Some servlet containers provide us with invalid classes,
			// no matter what @HandlesTypes says...
			if (!waiClass.isInterface() && !Modifier.isAbstract(waiClass.getModifiers()) &&
					WebApplicationInitializer.class.isAssignableFrom(waiClass)) {
				try {
					initializers.add((WebApplicationInitializer) waiClass.newInstance());
				}
				catch (Throwable ex) {
					throw new ServletException("Failed to instantiate WebApplicationInitializer class", ex);
				}
			}
		}
	}

	if (initializers.isEmpty()) {
		servletContext.log("No Spring WebApplicationInitializer types detected on classpath");
		return;
	}

	servletContext.log(initializers.size() + " Spring WebApplicationInitializers detected on classpath");
	AnnotationAwareOrderComparator.sort(initializers);
	for (WebApplicationInitializer initializer : initializers) {
		initializer.onStartup(servletContext);
	}
}
 

@Test
public void testGetBeanByTypeWithPriority() throws Exception {
	DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
	lbf.setDependencyComparator(AnnotationAwareOrderComparator.INSTANCE);
	RootBeanDefinition bd1 = new RootBeanDefinition(HighPriorityTestBean.class);
	RootBeanDefinition bd2 = new RootBeanDefinition(LowPriorityTestBean.class);
	lbf.registerBeanDefinition("bd1", bd1);
	lbf.registerBeanDefinition("bd2", bd2);
	TestBean bean = lbf.getBean(TestBean.class);
	assertThat(bean.getBeanName(), equalTo("bd1"));
}
 

private Comparator<Object> serverInterceptorOrderComparator() {
    Function<Object,Boolean> isOrderAnnotated = obj->{
        Order ann = obj instanceof Method ? AnnotationUtils.findAnnotation((Method) obj, Order.class) :
                AnnotationUtils.findAnnotation(obj.getClass(), Order.class);
        return ann != null;
    };
    return AnnotationAwareOrderComparator.INSTANCE.thenComparing((o1, o2) -> {
        boolean p1 = isOrderAnnotated.apply(o1);
        boolean p2 = isOrderAnnotated.apply(o2);
        return p1 && !p2 ? -1 : p2 && !p1 ? 1 : 0;
    }).reversed();
}
 

private void initControllerAdviceCaches(ApplicationContext applicationContext) {
	List<ControllerAdviceBean> beans = ControllerAdviceBean.findAnnotatedBeans(applicationContext);
	AnnotationAwareOrderComparator.sort(beans);

	for (ControllerAdviceBean bean : beans) {
		Class<?> beanType = bean.getBeanType();
		if (beanType != null) {
			Set<Method> attrMethods = MethodIntrospector.selectMethods(beanType, MODEL_ATTRIBUTE_METHODS);
			if (!attrMethods.isEmpty()) {
				this.modelAttributeAdviceCache.put(bean, attrMethods);
			}
			Set<Method> binderMethods = MethodIntrospector.selectMethods(beanType, INIT_BINDER_METHODS);
			if (!binderMethods.isEmpty()) {
				this.initBinderAdviceCache.put(bean, binderMethods);
			}
			ExceptionHandlerMethodResolver resolver = new ExceptionHandlerMethodResolver(beanType);
			if (resolver.hasExceptionMappings()) {
				this.exceptionHandlerAdviceCache.put(bean, resolver);
			}
		}
	}

	if (logger.isDebugEnabled()) {
		int modelSize = this.modelAttributeAdviceCache.size();
		int binderSize = this.initBinderAdviceCache.size();
		int handlerSize = this.exceptionHandlerAdviceCache.size();
		if (modelSize == 0 && binderSize == 0 && handlerSize == 0) {
			logger.debug("ControllerAdvice beans: none");
		}
		else {
			logger.debug("ControllerAdvice beans: " + modelSize + " @ModelAttribute, " + binderSize +
					" @InitBinder, " + handlerSize + " @ExceptionHandler");
		}
	}
}
 

@Test
public void listenersInOrder() {
	assertThat(context).isInstanceOf(AbstractApplicationContext.class);
	AbstractApplicationContext ctxt = (AbstractApplicationContext) context;
	List<ApplicationListener<?>> applicationListeners = new ArrayList<>(
			ctxt.getApplicationListeners());
	AnnotationAwareOrderComparator.sort(applicationListeners);
	int weightFilterIndex = applicationListeners
			.indexOf(context.getBean(WeightCalculatorWebFilter.class));
	int routeLocatorIndex = applicationListeners
			.indexOf(context.getBean(CachingRouteLocator.class));
	assertThat(weightFilterIndex > routeLocatorIndex)
			.as("CachingRouteLocator is after WeightCalculatorWebFilter").isTrue();
}
 

/**
 * Initialize the HandlerMappings used by this class.
 * <p>If no HandlerMapping beans are defined in the BeanFactory for this namespace,
 * we default to BeanNameUrlHandlerMapping.
 */
private void initHandlerMappings(ApplicationContext context) {
	this.handlerMappings = null;

	if (this.detectAllHandlerMappings) {
		// Find all HandlerMappings in the ApplicationContext, including ancestor contexts.
		Map<String, HandlerMapping> matchingBeans =
				BeanFactoryUtils.beansOfTypeIncludingAncestors(context, HandlerMapping.class, true, false);
		if (!matchingBeans.isEmpty()) {
			this.handlerMappings = new ArrayList<HandlerMapping>(matchingBeans.values());
			// We keep HandlerMappings in sorted order.
			AnnotationAwareOrderComparator.sort(this.handlerMappings);
		}
	}
	else {
		try {
			HandlerMapping hm = context.getBean(HANDLER_MAPPING_BEAN_NAME, HandlerMapping.class);
			this.handlerMappings = Collections.singletonList(hm);
		}
		catch (NoSuchBeanDefinitionException ex) {
			// Ignore, we'll add a default HandlerMapping later.
		}
	}

	// Ensure we have at least one HandlerMapping, by registering
	// a default HandlerMapping if no other mappings are found.
	if (this.handlerMappings == null) {
		this.handlerMappings = getDefaultStrategies(context, HandlerMapping.class);
		if (logger.isDebugEnabled()) {
			logger.debug("No HandlerMappings found in servlet '" + getServletName() + "': using default");
		}
	}
}