Use ObjectProvider to inject RequestMappingInfoHandlerMapping

[hisener]

We noticed failures in some Spring Boot tests in the Springdoc 1.5.11 upgrade PR.

In v1.5.11, SwaggerWelcomeWebMvc injects an optional RequestMappingInfoHandlerMapping, however it's possible to have multiple beans for that type. For instance, it's not uncommon to have ControllerEndpointHandlerMapping in addition to RequestMappingHandlerMapping.

This change uses ObjectProvider instead so that we can handle multiple beans.

The exception we get:

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'swaggerWelcome' defined in class path resource [org/springdoc/webmvc/ui/SwaggerConfig.class]: Unsatisfied dependency expressed through method 'swaggerWelcome' parameter 3; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping' available: expected single matching bean but found 3: requestMappingHandlerMapping,webEndpointServletHandlerMapping,controllerEndpointHandlerMapping

Relates to #1258 and 6e709c9.

[shami13]

Hi @hisener
Do you know some workaround for this issue, until it not merged and released new version?
Regards, Mykhailo

[hisener]

I think you could provide a SwaggerWelcomeWebMvc bean. So that it won't create the one in SwaggerConfig since it has @ConditionalOnMissingBean annotation.

We decided to stick with 1.5.10 until a fix is merged and released.

[bnasslahsen]

@hisener,

Thank you for your contribution !

[bnasslahsen]

@hisener,

I have made an adjustment to this PR, as ObjectProvider.orderedStream, breaks the compatibility with some dependent spring4 applications.
You can validate it on your side using the latest snapshot