[FIXED] Conversion of DTO to entity and vice-versa

Issue

I am using Spring MVC architecture with JPA in my web application. Where to convert data transfer object (DTO) to JPA entity and vice-versa, manually (that is, without using any framework)?

Solution

I think you are asking about where to write whole entity-->DTO conversion logic.

Like Your entity

class StudentEntity {
 int age ;
 String name;

 //getter
 //setter

 public StudentDTO _toConvertStudentDTO(){
    StudentDTO dto = new StudentDTO();
    //set dto values here from StudentEntity
    return dto;
 }

}

Your DTO Should be like

class StudentDTO  {
 int age ;
 String name;

 //getter
 //setter

 public StudentEntity _toConvertStudentEntity(){
    StudentEntity entity = new StudentEntity();
    //set entity values here from StudentDTO
    return entity ;
 }

}

And Your Controller should be like

@Controller
class MyController {

    public String my(){

    //Call the conversion method here like
    StudentEntity entity = myDao.getStudent(1);
    StudentDTO dto = entity._toConvertStudentDTO();

    //As vice versa

    }

}

Answered By - NIrav Modi
Answer Checked By - Terry (JavaFixing Volunteer)