The example application

Throughout the chapter, we'll develop a Report Viewer. The following is a screenshot of the finished application:

The data model

The data model is based on a simple SQL table, Call, that contains columns for the ID, client name, phone number, city, start time, duration, and status. The following is a JPA Entity representing this table:

@Entity
@Data
public class Call {

    @Id
    @GeneratedValue
    private Long id;

    private String client;

    private String phoneNumber;

    @Enumerated(EnumType.STRING)
    private City city;

    private LocalDateTime startTime;

    private Integer duration;

    @Enumerated(EnumType.STRING)
    private Status status;
}

Status and City are simple Java enums that define some...