EnumTranslator bean is not injected (is null)

Question

RepositoryRestMvcConfiguration class of Spring Data REST has method enumTranslator():

@Bean
public EnumTranslator enumTranslator() {
  return new EnumTranslator(resourceDescriptionMessageSourceAccessor());
}

that (I expect) registers an 'enumTranslator' Bean.

But when I try to use it in my component then it isn't injected and always is null:

@Component
public class MyComponent {

    private final EnumTranslator enumTranslator; 

    public MyComponent(EnumTranslator enumTranslator) {
        this.enumTranslator = enumTranslator;
    }

    public void someMethod() {             
        // enumTranslator -> null
    }
}

Could somebody explain why does this happens and how to correct inject such beans?

UPDATE

I've figured out - I tried to implement a class (Spring converter) that isn't managed by Spring ))

Thanks everybody who tried to help me!

What you describe should work, so there's probably something missing from your description. Are you sure that it's Spring that's instantiating the `MyComponent`? — slim, Nov 13 '17 at 17:17
(Run it in a debugger, put a breakpoint in the constructor, and look at the stack to see what's calling the `MyComponent(EnumTranslator)` constructor) — slim, Nov 13 '17 at 17:19

score 1 · Answer 1 · edited Jun 20 '20 at 09:12

1

It looks like the RepositoryRestMvcConfiguration bean was not loaded in the Spring container.
Try for example to import it with @Import(RepositoryRestMvcConfiguration.class) from a Configuration class.

According to the documentation :

2.4 Configuring Spring Data REST

...

You can either import this class into your existing configuration using an @Import annotation or you can subclass it and override any of the configureXXX methods to add your own configuration to that of Spring Data REST.

edited Jun 20 '20 at 09:12

Community

1
1

answered Nov 13 '17 at 17:10

davidxxx

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Since Spring 4.3, if there's only one constructor, `@Autowired` is implicit and not required. – slim Nov 13 '17 at 17:15
Right. Thanks. I kept the habit to specify it anyway. I edited. – davidxxx Nov 13 '17 at 17:30
I don't refer to autowiring it but to importing the bean. You can check it by displaying all loaded Spring beans. https://stackoverflow.com/questions/9602664/print-all-the-spring-beans-that-are-loaded – davidxxx Nov 13 '17 at 17:34
Thanks @davidxxx ! I've found the reason - check my update ) – Cepr0 Nov 14 '17 at 09:29

EnumTranslator bean is not injected (is null)

1 Answers1