/**
* For copyright information see the LICENSE document.
*/
package gwlpr.database.jpa;
import java.io.Serializable;
import javax.persistence.Query;
import javax.persistence.EntityNotFoundException;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import gwlpr.database.entities.Item;
import gwlpr.database.entities.Itemstat;
import gwlpr.database.entities.ItemstatPK;
import gwlpr.database.jpa.exceptions.NonexistentEntityException;
import gwlpr.database.jpa.exceptions.PreexistingEntityException;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
/**
*
* @author _rusty
*/
public class ItemstatJpaController implements Serializable
{
public ItemstatJpaController(EntityManagerFactory emf) {
this.emf = emf;
}
private EntityManagerFactory emf = null;
public EntityManager getEntityManager() {
return emf.createEntityManager();
}
public void create(Itemstat itemstat) throws PreexistingEntityException, Exception {
if (itemstat.getItemstatPK() == null) {
itemstat.setItemstatPK(new ItemstatPK());
}
itemstat.getItemstatPK().setItemID(itemstat.getItem().getId());
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Item item = itemstat.getItem();
if (item != null) {
item = em.getReference(item.getClass(), item.getId());
itemstat.setItem(item);
}
em.persist(itemstat);
if (item != null) {
item.getItemstatCollection().add(itemstat);
item = em.merge(item);
}
em.getTransaction().commit();
} catch (Exception ex) {
if (findItemstat(itemstat.getItemstatPK()) != null) {
throw new PreexistingEntityException("Itemstat " + itemstat + " already exists.", ex);
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void edit(Itemstat itemstat) throws NonexistentEntityException, Exception {
itemstat.getItemstatPK().setItemID(itemstat.getItem().getId());
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Itemstat persistentItemstat = em.find(Itemstat.class, itemstat.getItemstatPK());
Item itemOld = persistentItemstat.getItem();
Item itemNew = itemstat.getItem();
if (itemNew != null) {
itemNew = em.getReference(itemNew.getClass(), itemNew.getId());
itemstat.setItem(itemNew);
}
itemstat = em.merge(itemstat);
if (itemOld != null && !itemOld.equals(itemNew)) {
itemOld.getItemstatCollection().remove(itemstat);
itemOld = em.merge(itemOld);
}
if (itemNew != null && !itemNew.equals(itemOld)) {
itemNew.getItemstatCollection().add(itemstat);
itemNew = em.merge(itemNew);
}
em.getTransaction().commit();
} catch (Exception ex) {
String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) {
ItemstatPK id = itemstat.getItemstatPK();
if (findItemstat(id) == null) {
throw new NonexistentEntityException("The itemstat with id " + id + " no longer exists.");
}
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void destroy(ItemstatPK id) throws NonexistentEntityException {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Itemstat itemstat;
try {
itemstat = em.getReference(Itemstat.class, id);
itemstat.getItemstatPK();
} catch (EntityNotFoundException enfe) {
throw new NonexistentEntityException("The itemstat with id " + id + " no longer exists.", enfe);
}
Item item = itemstat.getItem();
if (item != null) {
item.getItemstatCollection().remove(itemstat);
item = em.merge(item);
}
em.remove(itemstat);
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public List<Itemstat> findItemstatEntities() {
return findItemstatEntities(true, -1, -1);
}
public List<Itemstat> findItemstatEntities(int maxResults, int firstResult) {
return findItemstatEntities(false, maxResults, firstResult);
}
private List<Itemstat> findItemstatEntities(boolean all, int maxResults, int firstResult) {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
cq.select(cq.from(Itemstat.class));
Query q = em.createQuery(cq);
if (!all) {
q.setMaxResults(maxResults);
q.setFirstResult(firstResult);
}
return q.getResultList();
} finally {
em.close();
}
}
public Itemstat findItemstat(ItemstatPK id) {
EntityManager em = getEntityManager();
try {
return em.find(Itemstat.class, id);
} finally {
em.close();
}
}
public int getItemstatCount() {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
Root<Itemstat> rt = cq.from(Itemstat.class);
cq.select(em.getCriteriaBuilder().count(rt));
Query q = em.createQuery(cq);
return ((Long) q.getSingleResult()).intValue();
} finally {
em.close();
}
}
}