Document that @Bean nullable parameters imply optional injection of the bean [SPR-16053]

[spring-projects-issues]

Jon Schneider opened SPR-16053 and commented

Question from Rob Fletcher:

If I autowire a @Bean method and one of the params is nullable (i.e. ? suffix) does that imply it’s non-required?

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Affects: 5.0.1

[spring-projects-issues]

Jon Schneider commented

It gets a org.jetbrains.annotations.Nullable annotation. Should be able to look for that.

[spring-projects-issues]

Sébastien Deleuze commented

Indeed like with @Autowired contructor parameters, @Bean method nullable parameters imply that the related beans may or may not exist (via the invocation of MethodParameter#isOptional). I will update the documentation accordingly.