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// AutowiredAnnotationBeanPostProcessor.java

private InjectionMetadata buildAutowiringMetadata(Class<?> clazz) {
	LinkedList<InjectionMetadata.InjectedElement> elements = new LinkedList<InjectionMetadata.InjectedElement>();
	Class<?> targetClass = clazz;

	do {
		LinkedList<InjectionMetadata.InjectedElement> currElements = new LinkedList<InjectionMetadata.InjectedElement>();
		for (Field field : targetClass.getDeclaredFields()) {
			AnnotationAttributes ann = findAutowiredAnnotation(field);
			if (ann != null) {
				if (Modifier.isStatic(field.getModifiers())) {
					if (logger.isWarnEnabled()) {
						logger.warn("Autowired annotation is not supported on static fields: " + field);
					}
					continue;
				}
				boolean required = determineRequiredStatus(ann);
				currElements.add(new AutowiredFieldElement(field, required));
			}
		}
		for (Method method : targetClass.getDeclaredMethods()) {
			Method bridgedMethod = BridgeMethodResolver.findBridgedMethod(method);
			if (!BridgeMethodResolver.isVisibilityBridgeMethodPair(method, bridgedMethod)) {
				continue;
			}
			AnnotationAttributes ann = findAutowiredAnnotation(bridgedMethod);
			if (ann != null && method.equals(ClassUtils.getMostSpecificMethod(method, clazz))) {
				if (Modifier.isStatic(method.getModifiers())) {
					if (logger.isWarnEnabled()) {
						logger.warn("Autowired annotation is not supported on static methods: " + method);
					}
					continue;
				}
				if (method.getParameterTypes().length == 0) {
					if (logger.isWarnEnabled()) {
						logger.warn("Autowired annotation should be used on methods with actual parameters: " + method);
					}
				}
				boolean required = determineRequiredStatus(ann);
				PropertyDescriptor pd = BeanUtils.findPropertyForMethod(bridgedMethod, clazz);
				currElements.add(new AutowiredMethodElement(method, required, pd));
			}
		}
		elements.addAll(0, currElements);
		targetClass = targetClass.getSuperclass();
	}
	while (targetClass != null && targetClass != Object.class);

	return new InjectionMetadata(clazz, elements);
}