DTO conveter pattern in Spring Boot

The main question is how to convert DTOs to entities and entities to Dtos without breaking SOLID principles.
For example we have such json:

{ id: 1,
  name: "user", 
  role: "manager" 
} 

DTO is:

public class UserDto {
 private Long id;
 private String name;
 private String roleName;
}

And entities are:

public class UserEntity {
  private Long id;
  private String name;
  private Role role
} 
public class RoleEntity {
  private Long id;
  private String roleName;
}

And there is usefull Java 8 DTO conveter pattern.

But in their example there is no One To many relations. In order to create UserEntity I need get Role by roleName using dao layer (service layer). Can I inject UserRepository (UserService) to conveter. Because it seems that converter component will break SRP principle, it must convert only, do not know about services or repository.

Converter example:

@Component
public class UserConverterImpl implements UserConverter<UserEntity, UserDto> {
   @Autowired
   private RoleRepository roleRepository;    

   @Override
   public UserEntity createFrom(final UserDto dto) {
       UserEntity userEntity = new UserEntity();
       Role role = roleRepository.findByRoleName(dto.getRoleName());
       userEntity.setName(dto.getName());
       userEntity.setRole(role);
       return updateEntity(new Account(), dto);
   }

   ....

Is it good to use repository in the conveter class? Or should I create another service/component that will be responsible for creating entities from DTOs (like UserFactory)?