Make StringToEnumIgnoringCaseConverterFactory public

[ghillert]

For Spring XD we ran into the need to have a more lenient enum converter. The functionality provided by StringToEnumIgnoringCaseConverterFactory is pretty much what we need, but unfortunately it is private, and hence we had to copy the code.

See also: https://jira.spring.io/browse/XD-3066

[snicoll]

How about using the RelaxedConversionService then? That one is public.

[wilkinsona]

Given the lack of response to @snicoll's suggestion, I'm going to assume that this is no longer needed. We can reopen this if that turns out to not be the case.

[michaldo]

I would like to use enum binding ignoring case in Spring MVC binding. I think simplest way is write WebMvcConfigurer with

@Override
 public void addFormatters(FormatterRegistry registry) {
    registry.addConverterFactory(new StringToEnumIgnoringCaseConverterFactory());
}

But StringToEnumIgnoringCaseConverterFactory is package private and RelaxedConversionService has gone.
Please give next suggestion

[wilkinsona]

I believe that'll work without configuring Spring MVC in Spring Boot 2.1 as the ApplicationConversionService, with which StringToEnumIgnoringCaseConverterFactory is registered, is now registered by default with the application context.

[michaldo]

Unfortunately, not. Spring Boot MVC 2.10 use WebConversionService, which is different than ApplicationConversionService

Fortunately, I found solution https://stackoverflow.com/a/52978020 which works in my case. But I feel a bit uncomfortable when I have to add bunch of converters (ApplicationConversionService.addApplicationConverters()) when I need only one

[wilkinsona]

Ah, yes. I'd forgotten about the different WebConversionService. Thanks for the reminder. I've opened #15019 to review the differences between the two and consider aligning them.