NullPointerException when trying to parse parseUnboundedValueObject of a Map<String, Object>

Clear description of my expectations versus reality I am using Javers with SpringBoot and Mongo DB. The object I’m saving in the Mongo DB is not of a flat structure. In fact it is quite complex: public class A { private final B b; private final C c; private final Map<String, List<E>> map; } My repository class looks like this: ` @JaversSpringDataAuditable public interface ARepository extends MongoRepository<A, String>{

@Query(value = "{'b.id' : ?0 }")
public Optional<A> findById(String id);

}

` I have simple service where I’d like to retrieve some info about object: who created/when etc

` @Service @RequiredArgsConstructor public class AService { private final Javers javers;

public String getInitSnapshot(String id) {
	QueryBuilder query = QueryBuilder.byClass(A.class);
	List<CdoSnapshot> snapshots = javers.findSnapshots(query.build());

	return javers.getJsonConverter().toJson(snapshots);
}

} `

And I have a tests to try it out:

` @ActiveProfiles(“test”) @SpringBootTest @Slf4j class AServiceTest { @Autowired private ARepository repository;

@Autowired
private AService service;


@Test
void testJavers() {
	repository.save(buildEntity());
	
	String info = service.getInitSnapshot("id");
	
	log.info(info);
	
	assertNotNull(info);
}

} `

Well, this doesn’t work. When Javers try to parse UnboundedValueObjectId of a Map<String, List<E>> .

Steps To Reproduce I have a **runnable test case ** which isolates the bug and allows Javers Core Team to easily reproduce it. I have pushed this test case to my fork of this repository:

Please feel free to fork out https://github.com/xytrams/javers-error

Javers’ Version 6.1.1

Additional context … Would be great if it could be fixed/dealt with.

[xytrams]

https://github.com/javers/javers/pull/1104 I tried to do my best to demonstrate the problem

[alabotski]

@bartoszwalacik can you give links with examples java test spring jpa + javers