Nitrite/Java: Something strange while inserting object

[Kutikov]

In my project, I insert an object into nitrite ObjectRepository<> and I'm facing strange exception:
java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object org.dizitart.no2.collection.Document.get(java.lang.String)' on a null object reference at org.dizitart.no2.repository.RepositoryOperations.toDocument(RepositoryOperations.java:119) at org.dizitart.no2.repository.RepositoryOperations.toDocuments(RepositoryOperations.java:97) at org.dizitart.no2.repository.DefaultObjectRepository.insert(DefaultObjectRepository.java:94) at org.dizitart.no2.repository.ObjectRepository.insert(ObjectRepository.java:122) at com.damirkut.diagnostic3d.repo.VisitSaver.save(VisitSaver.java:241)
Any ideas what can cause this exception?

[anidotnet]

Which version are you using? 4.x snapshot or 3.x release? And could you please give me some reproducible code?

[Kutikov]

Ok, I'll try it in 3-4 hours and confirm results

[Kutikov]

Same behaviour after fix
java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object org.dizitart.no2.collection.Document.get(java.lang.String)' on a null object reference at org.dizitart.no2.repository.RepositoryOperations.toDocument(RepositoryOperations.java:119) at org.dizitart.no2.repository.DefaultObjectRepository.update(DefaultObjectRepository.java:106) at com.damirkut.diagnostic3d.repo.VisitSaver.save(VisitSaver.java:237)

[anidotnet]

It seems in your case this line - https://github.com/nitrite/nitrite-java/blob/baa17a6e398b73f820492fda2ed945aa0131736b/nitrite/src/main/java/org/dizitart/no2/repository/RepositoryOperations.java#L103 returning null object for document. You need to debug there and see what is happening during serialization and why the document is coming as null.

[anidotnet]

Dude you are returning null instead of the document in your code 😄

https://github.com/Kutikov/diagnostic3D/blob/fe8d989782902234ed7512c2acef4f93ba40742e/app/src/main/java/com/damirkut/diagnostic3d/repo/VisitSaver.java#L301

[Kutikov]

There was nothing strange in behaviour. It's my mistake, I forget return document from write method. We both are too tired so you haven't seen this mistake.