org.springframework.core.annotation.AnnotationUtils#isCandidateClass ( )源码实例Demo

@Override
public boolean hasAnnotatedMethods(String annotationName) {
	if (AnnotationUtils.isCandidateClass(getIntrospectedClass(), annotationName)) {
		try {
			Method[] methods = ReflectionUtils.getDeclaredMethods(getIntrospectedClass());
			for (Method method : methods) {
				if (isAnnotatedMethod(method, annotationName)) {
					return true;
				}
			}
		}
		catch (Throwable ex) {
			throw new IllegalStateException("Failed to introspect annotated methods on " + getIntrospectedClass(), ex);
		}
	}
	return false;
}
 

@Override
@SuppressWarnings("deprecation")
public Set<MethodMetadata> getAnnotatedMethods(String annotationName) {
	Set<MethodMetadata> annotatedMethods = null;
	if (AnnotationUtils.isCandidateClass(getIntrospectedClass(), annotationName)) {
		try {
			Method[] methods = ReflectionUtils.getDeclaredMethods(getIntrospectedClass());
			for (Method method : methods) {
				if (isAnnotatedMethod(method, annotationName)) {
					if (annotatedMethods == null) {
						annotatedMethods = new LinkedHashSet<>(4);
					}
					annotatedMethods.add(new StandardMethodMetadata(method, this.nestedAnnotationsAsMap));
				}
			}
		}
		catch (Throwable ex) {
			throw new IllegalStateException("Failed to introspect annotated methods on " + getIntrospectedClass(), ex);
		}
	}
	return annotatedMethods != null ? annotatedMethods : Collections.emptySet();
}
 

@Override
public Object postProcessAfterInitialization(Object bean, String beanName) {
	if (bean instanceof AopInfrastructureBean || bean instanceof TaskScheduler ||
			bean instanceof ScheduledExecutorService) {
		// Ignore AOP infrastructure such as scoped proxies.
		return bean;
	}

	Class<?> targetClass = AopProxyUtils.ultimateTargetClass(bean);
	if (!this.nonAnnotatedClasses.contains(targetClass) &&
			AnnotationUtils.isCandidateClass(targetClass, Arrays.asList(Scheduled.class, Schedules.class))) {
		Map<Method, Set<Scheduled>> annotatedMethods = MethodIntrospector.selectMethods(targetClass,
				(MethodIntrospector.MetadataLookup<Set<Scheduled>>) method -> {
					Set<Scheduled> scheduledMethods = AnnotatedElementUtils.getMergedRepeatableAnnotations(
							method, Scheduled.class, Schedules.class);
					return (!scheduledMethods.isEmpty() ? scheduledMethods : null);
				});
		if (annotatedMethods.isEmpty()) {
			this.nonAnnotatedClasses.add(targetClass);
			if (logger.isTraceEnabled()) {
				logger.trace("No @Scheduled annotations found on bean class: " + targetClass);
			}
		}
		else {
			// Non-empty set of methods
			annotatedMethods.forEach((method, scheduledMethods) ->
					scheduledMethods.forEach(scheduled -> processScheduled(scheduled, method, bean)));
			if (logger.isTraceEnabled()) {
				logger.trace(annotatedMethods.size() + " @Scheduled methods processed on bean '" + beanName +
						"': " + annotatedMethods);
			}
		}
	}
	return bean;
}
 

@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
	if (bean instanceof AopInfrastructureBean || bean instanceof JmsListenerContainerFactory ||
			bean instanceof JmsListenerEndpointRegistry) {
		// Ignore AOP infrastructure such as scoped proxies.
		return bean;
	}

	Class<?> targetClass = AopProxyUtils.ultimateTargetClass(bean);
	if (!this.nonAnnotatedClasses.contains(targetClass) &&
			AnnotationUtils.isCandidateClass(targetClass, JmsListener.class)) {
		Map<Method, Set<JmsListener>> annotatedMethods = MethodIntrospector.selectMethods(targetClass,
				(MethodIntrospector.MetadataLookup<Set<JmsListener>>) method -> {
					Set<JmsListener> listenerMethods = AnnotatedElementUtils.getMergedRepeatableAnnotations(
							method, JmsListener.class, JmsListeners.class);
					return (!listenerMethods.isEmpty() ? listenerMethods : null);
				});
		if (annotatedMethods.isEmpty()) {
			this.nonAnnotatedClasses.add(targetClass);
			if (logger.isTraceEnabled()) {
				logger.trace("No @JmsListener annotations found on bean type: " + targetClass);
			}
		}
		else {
			// Non-empty set of methods
			annotatedMethods.forEach((method, listeners) ->
					listeners.forEach(listener -> processJmsListener(listener, method, bean)));
			if (logger.isDebugEnabled()) {
				logger.debug(annotatedMethods.size() + " @JmsListener methods processed on bean '" + beanName +
						"': " + annotatedMethods);
			}
		}
	}
	return bean;
}
 

private LifecycleMetadata buildLifecycleMetadata(final Class<?> clazz) {
	if (!AnnotationUtils.isCandidateClass(clazz, Arrays.asList(this.initAnnotationType, this.destroyAnnotationType))) {
		return this.emptyLifecycleMetadata;
	}

	List<LifecycleElement> initMethods = new ArrayList<>();
	List<LifecycleElement> destroyMethods = new ArrayList<>();
	Class<?> targetClass = clazz;

	do {
		final List<LifecycleElement> currInitMethods = new ArrayList<>();
		final List<LifecycleElement> currDestroyMethods = new ArrayList<>();

		ReflectionUtils.doWithLocalMethods(targetClass, method -> {
			if (this.initAnnotationType != null && method.isAnnotationPresent(this.initAnnotationType)) {
				LifecycleElement element = new LifecycleElement(method);
				currInitMethods.add(element);
				if (logger.isTraceEnabled()) {
					logger.trace("Found init method on class [" + clazz.getName() + "]: " + method);
				}
			}
			if (this.destroyAnnotationType != null && method.isAnnotationPresent(this.destroyAnnotationType)) {
				currDestroyMethods.add(new LifecycleElement(method));
				if (logger.isTraceEnabled()) {
					logger.trace("Found destroy method on class [" + clazz.getName() + "]: " + method);
				}
			}
		});

		initMethods.addAll(0, currInitMethods);
		destroyMethods.addAll(currDestroyMethods);
		targetClass = targetClass.getSuperclass();
	}
	while (targetClass != null && targetClass != Object.class);

	return (initMethods.isEmpty() && destroyMethods.isEmpty() ? this.emptyLifecycleMetadata :
			new LifecycleMetadata(clazz, initMethods, destroyMethods));
}
 

@Override
public boolean matches(Class<?> clazz) {
	return AnnotationUtils.isCandidateClass(clazz, this.annotationType);
}
 

@Override
public boolean isCandidateClass(Class<?> targetClass) {
	return AnnotationUtils.isCandidateClass(targetClass, CACHE_OPERATION_ANNOTATIONS);
}
 

private InjectionMetadata buildPersistenceMetadata(final Class<?> clazz) {
	if (!AnnotationUtils.isCandidateClass(clazz, Arrays.asList(PersistenceContext.class, PersistenceUnit.class))) {
		return InjectionMetadata.EMPTY;
	}

	List<InjectionMetadata.InjectedElement> elements = new ArrayList<>();
	Class<?> targetClass = clazz;

	do {
		final LinkedList<InjectionMetadata.InjectedElement> currElements = new LinkedList<>();

		ReflectionUtils.doWithLocalFields(targetClass, field -> {
			if (field.isAnnotationPresent(PersistenceContext.class) ||
					field.isAnnotationPresent(PersistenceUnit.class)) {
				if (Modifier.isStatic(field.getModifiers())) {
					throw new IllegalStateException("Persistence annotations are not supported on static fields");
				}
				currElements.add(new PersistenceElement(field, field, null));
			}
		});

		ReflectionUtils.doWithLocalMethods(targetClass, method -> {
			Method bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
			if (!BridgeMethodResolver.isVisibilityBridgeMethodPair(method, bridgedMethod)) {
				return;
			}
			if ((bridgedMethod.isAnnotationPresent(PersistenceContext.class) ||
					bridgedMethod.isAnnotationPresent(PersistenceUnit.class)) &&
					method.equals(ClassUtils.getMostSpecificMethod(method, clazz))) {
				if (Modifier.isStatic(method.getModifiers())) {
					throw new IllegalStateException("Persistence annotations are not supported on static methods");
				}
				if (method.getParameterCount() != 1) {
					throw new IllegalStateException("Persistence annotation requires a single-arg method: " + method);
				}
				PropertyDescriptor pd = BeanUtils.findPropertyForMethod(bridgedMethod, clazz);
				currElements.add(new PersistenceElement(method, bridgedMethod, pd));
			}
		});

		elements.addAll(0, currElements);
		targetClass = targetClass.getSuperclass();
	}
	while (targetClass != null && targetClass != Object.class);

	return InjectionMetadata.forElements(elements, clazz);
}
 

@Override
public boolean isCandidateClass(Class<?> targetClass) {
	return AnnotationUtils.isCandidateClass(targetClass, javax.transaction.Transactional.class);
}
 

@Override
public boolean isCandidateClass(Class<?> targetClass) {
	return AnnotationUtils.isCandidateClass(targetClass, Transactional.class);
}
 

@Override
public boolean isCandidateClass(Class<?> targetClass) {
	return AnnotationUtils.isCandidateClass(targetClass, javax.ejb.TransactionAttribute.class);
}