/**
* For copyright information see the LICENSE document.
*/
package gwlpr.database.jpa;
import gwlpr.database.entities.Npc;
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.Weapon;
import gwlpr.database.jpa.exceptions.NonexistentEntityException;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
/**
*
* @author _rusty
*/
public class NpcJpaController implements Serializable
{
public NpcJpaController(EntityManagerFactory emf) {
this.emf = emf;
}
private EntityManagerFactory emf = null;
public EntityManager getEntityManager() {
return emf.createEntityManager();
}
public void create(Npc npc) {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Weapon weapons = npc.getWeapons();
if (weapons != null) {
weapons = em.getReference(weapons.getClass(), weapons.getId());
npc.setWeapons(weapons);
}
em.persist(npc);
if (weapons != null) {
weapons.getNpcCollection().add(npc);
weapons = em.merge(weapons);
}
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public void edit(Npc npc) throws NonexistentEntityException, Exception {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Npc persistentNpc = em.find(Npc.class, npc.getId());
Weapon weaponsOld = persistentNpc.getWeapons();
Weapon weaponsNew = npc.getWeapons();
if (weaponsNew != null) {
weaponsNew = em.getReference(weaponsNew.getClass(), weaponsNew.getId());
npc.setWeapons(weaponsNew);
}
npc = em.merge(npc);
if (weaponsOld != null && !weaponsOld.equals(weaponsNew)) {
weaponsOld.getNpcCollection().remove(npc);
weaponsOld = em.merge(weaponsOld);
}
if (weaponsNew != null && !weaponsNew.equals(weaponsOld)) {
weaponsNew.getNpcCollection().add(npc);
weaponsNew = em.merge(weaponsNew);
}
em.getTransaction().commit();
} catch (Exception ex) {
String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) {
Integer id = npc.getId();
if (findNpc(id) == null) {
throw new NonexistentEntityException("The npc with id " + id + " no longer exists.");
}
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void destroy(Integer id) throws NonexistentEntityException {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Npc npc;
try {
npc = em.getReference(Npc.class, id);
npc.getId();
} catch (EntityNotFoundException enfe) {
throw new NonexistentEntityException("The npc with id " + id + " no longer exists.", enfe);
}
Weapon weapons = npc.getWeapons();
if (weapons != null) {
weapons.getNpcCollection().remove(npc);
weapons = em.merge(weapons);
}
em.remove(npc);
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public List<Npc> findNpcEntities() {
return findNpcEntities(true, -1, -1);
}
public List<Npc> findNpcEntities(int maxResults, int firstResult) {
return findNpcEntities(false, maxResults, firstResult);
}
private List<Npc> findNpcEntities(boolean all, int maxResults, int firstResult) {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
cq.select(cq.from(Npc.class));
Query q = em.createQuery(cq);
if (!all) {
q.setMaxResults(maxResults);
q.setFirstResult(firstResult);
}
return q.getResultList();
} finally {
em.close();
}
}
public Npc findNpc(Integer id) {
EntityManager em = getEntityManager();
try {
return em.find(Npc.class, id);
} finally {
em.close();
}
}
public int getNpcCount() {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
Root<Npc> rt = cq.from(Npc.class);
cq.select(em.getCriteriaBuilder().count(rt));
Query q = em.createQuery(cq);
return ((Long) q.getSingleResult()).intValue();
} finally {
em.close();
}
}
}