Spring Data: JPA repository findAll() to return *Map instead of List?

Question

I have a Spring Data JPA repository interface that looks something like this:

@Repository
public interface DBReportRepository extends JpaRepository

        

Answer 1

I dont think you will find an easier solution as to create a simple one liner to convert your result to a map. It is simple and fast with java 8 lambdas:

Map transactionMap = transactionList.stream()
         .collect(Collectors.toMap(Transaction::getId, Function.identity()));