xml/注解方式定义的消费服务bean如何配合@Conditional相关注解

[lduffy69]

如题，在@ConditionalOnBean/@ConditionalOnMissingBean下：

@ConditionalOnMissingBean(value = UserService.class, parameterizedContainer = {ReferenceBean.class})

失效，在Condition相关注解扫描beanDefination时，获取的RootBD是Reference<?>，导致不能匹配，是否在registerBD时，未考虑泛型问题？

[lduffy69]

AbstractBeanFactory

	ResolvableType getTypeForFactoryBeanFromAttributes(AttributeAccessor attributes) {
                 //注册Reference beanDefination时，是否可以设置目标类型
		Object attribute = attributes.getAttribute(FactoryBean.OBJECT_TYPE_ATTRIBUTE);
		if (attribute instanceof ResolvableType) {
			return (ResolvableType) attribute;
		}
		if (attribute instanceof Class) {
			return ResolvableType.forClass((Class<?>) attribute);
		}
		return ResolvableType.NONE;
	}

[kylixs]

AbstractBeanFactory

	ResolvableType getTypeForFactoryBeanFromAttributes(AttributeAccessor attributes) {
                 //注册Reference beanDefination时，是否可以设置目标类型
		Object attribute = attributes.getAttribute(FactoryBean.OBJECT_TYPE_ATTRIBUTE);
		if (attribute instanceof ResolvableType) {
			return (ResolvableType) attribute;
		}
		if (attribute instanceof Class) {
			return ResolvableType.forClass((Class<?>) attribute);
		}
		return ResolvableType.NONE;
	}

It is very good, simpler than decorated definition! But it is available since Spring 5.2, cannot be used in Spring 4.x .