Question

Is there any method to set a DTO object that has ,an Array as instance variable, at once?
here is the DTO

public class AbcDTO {

String label;
Float[] time;
String[] startTime;
//getters and setters 
 }

This is the bean class from where i’m trying to set this DTO

q = em.createNamedQuery("namedQuery");
        q.setParameter(1, anaId);
        List<Object> objects = new ArrayList();
        objects = q.getResultList();

Now List of objects , objects , will contain a list where each element of the list has two fields , time and startTime , from the databse . How can I set the DTO object with the given list .

Answer 1

With the current DTO you will have to iterate through the result list, collect the time and startTime values and assign them to your DTO. JPA does not provide a direct way for this.

What you could do is to change your DTO to have a single time and a single startTime field. Then you could map a result list to a list of DTOs with a constructor expression:

List<AbcDTO2> dtos = em.createQuery("SELECT new com.example.AbcDTO2( o.time, o.startTime) FROM Entity o").getResultList();