Lombok - retain field's annotation in constructor input params

Question

Lombok misses field's annotation while auto generating constructor. Is there a way to retain field's annotation in constructor input params?

Class to generate constructor,

@RequiredArgsConstructor(onConstructor = @__(@Inject))
public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyHandler")
    private final SomeHandler handler;
}

Generated class :

public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyField")
    private final SomeHandler handler;

    @Inject
    public Test(final String field, final SomeHandler handler) {
        this.field = field;
        this.handler = handler;
    }
}

Desired class :

public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyHandler")
    private final SomeHandler handler;

    @Inject
    public Test(@Named("MyField")final String field, 
                @Named("MyHandler")final SomeHandler handler) {
        this.field = field;
        this.handler = handler;
    }

}

Answer 1

In version v1.18.4 Lombok added support for copying specific annotations. Meaning, that if you put following setting to lombok.config:

lombok.copyableAnnotations += com.google.inject.name.Named

and apply following Lombok annotations to your class:

@RequiredArgsConstructor(onConstructor = @__(@Inject))
public class Hello {
    @NonNull @Named("my-name") String name;
}

the @Named annotation should be copied to your generated constructor argument.

Limitations: this does not work when annotation can't be put on a field or annotation on a field overrides constructor initialization