package me.victorhernandez.hibernate;
import org.hibernate.Session;
import java.util.*;
import me.victorhernandez.hibernate.domain.Event;
import me.victorhernandez.hibernate.domain.Person;
import me.victorhernandez.hibernate.util.HibernateUtil;
public class EventManager {
public static void main(String[] args) {
EventManager mgr = new EventManager();
if (args[0].equals("store")) {
mgr.createAndStoreEvent("My Event", new Date());
} else if (args[0].equals("list")) {
List<Event> events = mgr.listEvents();
for (int i = 0; i < events.size(); i++) {
Event theEvent = (Event) events.get(i);
System.out.println("Event: " + theEvent.getTitle() + " Time: "
+ theEvent.getDate());
}
} else if (args[0].equals("listpersonsinevent")) {
//getting the events
List<Event> events = mgr.listEvents();
for (int i = 0; i < events.size(); i++) {
Event theEvent = (Event) events.get(i);
//getting persons in each event
List<Person> persons;
if ( ( persons = mgr.listPersonsInEvents( theEvent.getId() ) ) == null )
continue;
//printing events
System.out.println("Event: " + theEvent.getTitle() + " Time: "
+ theEvent.getDate());
for (int j = 0; j < persons.size(); j++) {
//printing persons in each event
Person thePerson = (Person) persons.get(j);
System.out.println("Person: " + thePerson.getFirstname()
+ " " + thePerson.getLastname());
}
}
} else if (args[0].equals("addpersontoevent")) {
Long eventId = mgr.createAndStoreEvent("My Event", new Date());
Long personId = mgr.createAndStorePerson("Foo", "Bar");
mgr.addPersonToEvent(personId, eventId);
System.out.println("Added person " + personId + " to event "
+ eventId);
}
HibernateUtil.getSessionFactory().close();
}
private Long createAndStoreEvent(String title, Date theDate) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Event theEvent = new Event();
theEvent.setTitle(title);
theEvent.setDate(theDate);
Long eventId = (Long) session.save(theEvent);
session.getTransaction().commit();
return eventId;
}
private Long createAndStorePerson(String firstName, String lastName) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person thePerson = new Person();
thePerson.setFirstname(firstName);
thePerson.setLastname(lastName);
Long personId = (Long) session.save(thePerson);
session.getTransaction().commit();
return personId;
}
private List<Event> listEvents() {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
@SuppressWarnings("unchecked")
List<Event> result = session.createQuery("from Event").list();
session.getTransaction().commit();
return result;
}
private List<Person> listPersonsInEvents(Long eventId) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
@SuppressWarnings("unchecked")
List<Person> result = session
.createQuery("from Person where Event = :eid")
.setParameter("eid", eventId).list();
session.getTransaction().commit();
return result;
}
private void addPersonToEvent(Long personId, Long eventId) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person aPerson = (Person) session.load(Person.class, personId);
Event anEvent = (Event) session.load(Event.class, eventId);
aPerson.getEvents().add(anEvent);
session.getTransaction().commit();
}
private void addEmailToPerson(Long personId, String emailAddress) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person aPerson = (Person) session.load(Person.class, personId);
// adding to the emailAddress collection might trigger a lazy load of the collection
aPerson.getEmailAddresses().add(emailAddress);
session.getTransaction().commit();
}
}