@Entity
@NamedQueries({
    @NamedQuery(name = "Exam.teste", query = "SELECT e FROM Exam e join fetch e.detail")
})
@Table(name = "exam")
public class Exam implements BaseEntity, FieldHandled{
   private static final long serialVersionUID = 1L;

   /*
    * @Basic annotation has been added to all basic fields
    */
   private FieldHandler fieldHandler;
   
   private int id;
   private String shortName;

   private ExamDetail detail;

   @Id
   @GeneratedValue
   @Column(name = "id")
   public int getId() {
      return id;
   }

   private void setId(int id) {
      this.id = id;
   }

   @OneToOne(fetch = FetchType.LAZY, mappedBy = "exam")
   @LazyToOne(LazyToOneOption.NO_PROXY)
   public ExamDetail getDetail() {
      if (detail == null && fieldHandler != null)
         detail = (ExamDetail) fieldHandler.readObject(this, "detail", detail);
      return detail;
   }

   public void setDetail(ExamDetail detail) {
      if (fieldHandler != null)
         this.detail = (ExamDetail) fieldHandler.writeObject(this, "detail", this.detail, detail);
      else
         this.detail = detail;
   }

   @Basic
   public String getShortName() {
      return shortName;
   }

   public void setShortName(String shortName) {
      this.shortName = shortName;
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + id;
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj)
         return true;
      if (obj == null)
         return false;
      if (getClass() != obj.getClass())
         return false;
      Exam other = (Exam) obj;
      if (id != other.id)
         return false;
      return true;
   }
   
   @Override
   public void setFieldHandler(FieldHandler handler) {
      fieldHandler = handler;      
   }

   @Override
   public FieldHandler getFieldHandler() {
      return fieldHandler;
   }
   
}

@Entity
@Table(name = "exam_detail")
public class ExamDetail implements BaseEntity {
   /*
    * @Basic annotation has been added to all basic fields
    */
   private int id;
   private String fullName;
   private int numberOfQuestions;
   private int passingPercentage;
   private Exam exam;
   
   public ExamDetail() {
      System.out.println("xxx");
   }

   @Id
   @GeneratedValue
   @Column(name = "id")
   public int getId() {
      return id;
   }

   private void setId(int id) {
      this.id = id;
   }

   @OneToOne(cascade = CascadeType.ALL, fetch=FetchType.LAZY)
   @JoinColumn(name = "exam_id")
   public Exam getExam() {
      return exam;
   }

   public void setExam(Exam exam) {
      this.exam = exam;   
   }

   @Basic
   public String getFullName() {
      return fullName;
   }

   public void setFullName(String fullName) {
      this.fullName = fullName;
   }

   @Basic
   public int getNumberOfQuestions() {
      return numberOfQuestions;
   }

   public void setNumberOfQuestions(int numberOfQuestions) {
      this.numberOfQuestions = numberOfQuestions;
   }

   @Basic
   public int getPassingPercentage() {
      return passingPercentage;
   }

   public void setPassingPercentage(int passingPercentage) {
      this.passingPercentage = passingPercentage;
   }

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 1;
      result = prime * result + id;
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj)
         return true;
      if (obj == null)
         return false;
      if (getClass() != obj.getClass())
         return false;
      ExamDetail other = (ExamDetail) obj;
      if (id != other.id)
         return false;
      return true;
   }

}