/*
* DonationController.java
*
* Created on 4 May 2007, 19:56
*
*/
package org.spw.controller;
import java.util.List;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import org.spw.model.Donation;
/**
* This class manage the Donation entities.
* It's a basic CRUD controller
* @author PSe
*/
public class DonationController {
private final EntityManagerFactory emf;
/** Creates a new instance of DonationController */
public DonationController() {
Properties props = PropertiesLoader.loadProperties("database.properties");
if (props != null)
{
emf = Persistence.createEntityManagerFactory("VolunteerPU", props);
}
else
{
emf = Persistence.createEntityManagerFactory("VolunteerPU");
}
}
/**
* Retreive all the donations
* @return all the donations
*/
public List<Donation> getDonations() {
EntityManager em = emf.createEntityManager();
List<Donation> result = null;
try {
Query query = em.createNamedQuery("Donation.findAll");
result = query.getResultList();
} catch (Exception e) {
Logger.getLogger(DonationController.class.getName()).log(Level.SEVERE, "Error Query all Donation", e);
if (em.getTransaction().isActive())
em.getTransaction().rollback();
} finally {
em.close();
}
return result;
}
/**
* Createa new donation
* @param object the donation to create
*/
public void create(Donation object) {
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
try {
em.persist(object);
em.getTransaction().commit();
} catch (Exception e) {
Logger.getLogger(DonationController.class.getName()).log(Level.SEVERE, "Error creating " + object, e);
if (em.getTransaction().isActive())
em.getTransaction().rollback();
} finally {
em.close();
}
}
/**
* Find a new donation
* @param key The unique ID of the object
* @return a donation if found, null otherwise
*/
public Donation read(Long key) {
EntityManager em = emf.createEntityManager();
Donation retValue = null;
try {
retValue = em.find(Donation.class, key);
} catch (Exception e) {
Logger.getLogger(DonationController.class.getName()).log(Level.SEVERE, "Error reading " + key, e);
if (em.getTransaction().isActive())
em.getTransaction().rollback();
} finally {
em.close();
}
return retValue;
}
/**
* Update an existing donation. If it's a new Donation, create it.
* @param object The donation to update
* @return the new object donation after the persistence operation
*/
public Donation update(Donation object) {
Donation result = null;
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
try {
result = em.merge(object);
em.getTransaction().commit();
} catch (Exception e) {
Logger.getLogger(DonationController.class.getName()).log(Level.SEVERE, "Error updating " + object, e);
if (em.getTransaction().isActive())
em.getTransaction().rollback();
} finally {
em.close();
}
return result;
}
/**
* Delete an instance of Donation
* @param object The donation to delete
*/
public void delete(Donation object) {
EntityManager em = emf.createEntityManager();
em.getTransaction().begin();
try {
Donation entity = em.find(Donation.class, object.getIdDonation());
em.remove(entity);
em.getTransaction().commit();
} catch (Exception e) {
Logger.getLogger(DonationController.class.getName()).log(Level.SEVERE, "Error deleting " + object, e);
if (em.getTransaction().isActive())
em.getTransaction().rollback();
} finally {
em.close();
}
}
}