ass1-jpa/src/main/java/dst/ass1/jpa/dao/impl/ParticipantDAO.java

   1 package dst.ass1.jpa.dao.impl;
   2
   3 import dst.ass1.jpa.dao.IParticipantDAO;
   4 import dst.ass1.jpa.model.IParticipant;
   5 import dst.ass1.jpa.model.impl.Participant;
   6 import dst.ass1.jpa.util.Constants;
   7
   8 import javax.persistence.EntityManager;
   9 import javax.persistence.NoResultException;
  10
  11
  12 public class ParticipantDAO extends GenericDAO<Participant, IParticipant> implements IParticipantDAO {
  13     public ParticipantDAO(EntityManager em) {
  14         super(em, Participant.class);
  15     }
  16
  17     @Override
  18     public IParticipant findByEmail(String email) {
  19         try {
  20             return em.createNamedQuery(Constants.Q_PARTICIPANT_BY_EMAIL, Participant.class)
  21                     .setParameter("email", email).getSingleResult();
  22         } catch (NoResultException e) {
  23             return null;
  24         }
  25     }
  26 }