public class Speaker extends BaseEntity {
             ...
   @OneToMany(mappedBy = "speaker", fetch = FetchType.EAGER)
   private Set<Talk> talks;
             ...
}

public class Talk extends BaseEntity {
             ...
   @ManyToOne(cascade = CascadeType.ALL)
   @JoinColumn(name = "SPEAKER_FK", nullable=false)
   private Speaker speaker;
             ...
}

@Repository
@Transactional
public class SpeakerDaoImpl extends GenericDaoImpl<Speaker, Long> implements SpeakerDao {

   @Autowired
   private SessionFactory sessionFactory;

   public void setSessionFactory(SessionFactory s) {
      this.sessionFactory = s;
   }

   protected SessionFactory getSessionFactory() {
      if (sessionFactory == null) {
         throw new IllegalStateException(
               "sessionFactory has not been set on DAO before usage");
      }
      return sessionFactory;
   }

   protected Session getSession() {
      return getSessionFactory().getCurrentSession();
   }

   @SuppressWarnings("unchecked")
   public List<Speaker> findByLastName(String lastName) {
      Criteria criteria = getSession().createCriteria(getPersistentClass());
      criteria.add(Restrictions.like("lastName", lastName));
      return criteria.list();
   }

   @Transactional
   public Speaker makePersistent(Speaker speaker) {
      getSession().saveOrUpdate(speaker);
      return speaker;
   }
}

package com.mycompany.myproject;

import java.util.List;

import org.joda.time.LocalDateTime;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mycompany.myproject.model.Speaker;
import com.mycompany.myproject.model.Talk;

public class AdapterTest {

   protected ApplicationContext applicationContext;

   private static final Logger LOGGER = LoggerFactory
         .getLogger(AdapterTest.class);

   protected SpeakerDao speakerDao;

   protected TalkDao talkDao;

   @Before
   public void setUp() {
      applicationContext = new ClassPathXmlApplicationContext(new String[] {
            "classpath*:adapter-test-context.xml",
            "classpath*:datasource-test-context.xml" });
      speakerDao = (SpeakerDao) applicationContext.getBean("speakerDao");
      talkDao = (TalkDao) applicationContext.getBean("talkDao");
   }

   @After
   public void tearDown() {
      applicationContext = null;
      speakerDao = null;
      talkDao = null;
   }

   @Test
   public void testDataWritingAndReading() {

      // Creates one speaker
      Speaker newSpeaker = new Speaker();
      newSpeaker.setFirstName("John");
      newSpeaker.setLastName("Smith");
      newSpeaker.setEmail("john.smith@mycompany.com");
      newSpeaker.setOrganization("Mycompany");
      newSpeaker.setBirthDate(new LocalDateTime(1979, 1, 1, 0, 0));
      newSpeaker.setAge(22);
      newSpeaker.setGender("M");
      Speaker createdSpeaker = speakerDao.makePersistent(newSpeaker);
      
      // Creates a first talk, assign it to the speaker
      Talk talk1 = new Talk();
      talk1.setTitle("One title");
      talk1.setDescription("About this one title");
      talk1.setSpeaker(createdSpeaker);
      talkDao.makePersistent(talk1);

      //Create second talk with speaker3
      Talk talk2 = new Talk();
      talk2.setTitle("Another title");
      talk2.setDescription("About this other title");
      talk2.setSpeaker(createdSpeaker);
      talkDao.makePersistent(talk2);
      
      List<Speaker> speakersFound = speakerDao.findAll();
      LOGGER.debug("Total number of speakers : " + speakersFound.size());
      
      for(Speaker s : speakersFound)
         LOGGER.debug(s.toString());
   }
}

public class Speaker extends BaseEntity {
   
   ...

   @Override
   public int hashCode() {
      final int prime = 31;
      int result = 0;
      result = prime * result + ((age == null) ? 0 : age.hashCode());
      result = prime * result
            + ((birthDate == null) ? 0 : birthDate.hashCode());
      result = prime * result + ((email == null) ? 0 : email.hashCode());
      result = prime * result
            + ((firstName == null) ? 0 : firstName.hashCode());
      result = prime * result + ((gender == null) ? 0 : gender.hashCode());
      result = prime * result
            + ((lastName == null) ? 0 : lastName.hashCode());
      result = prime * result
            + ((organization == null) ? 0 : organization.hashCode());
      return result;
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj) {
         return true;
      }
      if (!(obj instanceof Speaker)) {
         return false;
      }
      Speaker other = (Speaker) obj;
      if (age == null) {
         if (other.age != null) {
            return false;
         }
      } else if (!age.equals(other.age)) {
         return false;
      }
      if (birthDate == null) {
         if (other.birthDate != null) {
            return false;
         }
      } else if (!birthDate.equals(other.birthDate)) {
         return false;
      }
      if (email == null) {
         if (other.email != null) {
            return false;
         }
      } else if (!email.equals(other.email)) {
         return false;
      }
      if (firstName == null) {
         if (other.firstName != null) {
            return false;
         }
      } else if (!firstName.equals(other.firstName)) {
         return false;
      }
      if (gender == null) {
         if (other.gender != null) {
            return false;
         }
      } else if (!gender.equals(other.gender)) {
         return false;
      }
      if (lastName == null) {
         if (other.lastName != null) {
            return false;
         }
      } else if (!lastName.equals(other.lastName)) {
         return false;
      }
      if (organization == null) {
         if (other.organization != null) {
            return false;
         }
      } else if (!organization.equals(other.organization)) {
         return false;
      }
      return true;
   }

   ...

}

select
        *
    from
        CONF_SPEAKER this_ left outer join CONF_TALK talks2_
            on this_.ID = talks2_.SPEAKER_FK;