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package jpa.controllers;
import entity.Commentrates;
import java.io.Serializable;
import javax.persistence.Query;
import javax.persistence.EntityNotFoundException;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import entity.Comments;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import jpa.controllers.exceptions.IllegalOrphanException;
import jpa.controllers.exceptions.NonexistentEntityException;
import jpa.controllers.exceptions.PreexistingEntityException;
/**
*
* @author atap
*/
public class CommentratesJpaController implements Serializable {
public CommentratesJpaController() {
}
public CommentratesJpaController(EntityManagerFactory emf) {
this.emf = emf;
}
private EntityManagerFactory emf = Persistence.createEntityManagerFactory("EducationXPU");
public EntityManager getEntityManager() {
return emf.createEntityManager();
}
public void create(Commentrates commentrates) throws IllegalOrphanException, PreexistingEntityException, Exception {
List<String> illegalOrphanMessages = null;
Comments commentsOrphanCheck = commentrates.getComments();
if (commentsOrphanCheck != null) {
Commentrates oldCommentratesOfComments = commentsOrphanCheck.getCommentrates();
if (oldCommentratesOfComments != null) {
if (illegalOrphanMessages == null) {
illegalOrphanMessages = new ArrayList<String>();
}
illegalOrphanMessages.add("The Comments " + commentsOrphanCheck + " already has an item of type Commentrates whose comments column cannot be null. Please make another selection for the comments field.");
}
}
if (illegalOrphanMessages != null) {
throw new IllegalOrphanException(illegalOrphanMessages);
}
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Comments comments = commentrates.getComments();
if (comments != null) {
comments = em.getReference(comments.getClass(), comments.getId());
commentrates.setComments(comments);
}
em.persist(commentrates);
if (comments != null) {
comments.setCommentrates(commentrates);
comments = em.merge(comments);
}
em.getTransaction().commit();
} catch (Exception ex) {
if (findCommentrates(commentrates.getId()) != null) {
throw new PreexistingEntityException("Commentrates " + commentrates + " already exists.", ex);
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void edit(Commentrates commentrates) throws IllegalOrphanException, NonexistentEntityException, Exception {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Commentrates persistentCommentrates = em.find(Commentrates.class, commentrates.getId());
Comments commentsOld = persistentCommentrates.getComments();
Comments commentsNew = commentrates.getComments();
List<String> illegalOrphanMessages = null;
if (commentsNew != null && !commentsNew.equals(commentsOld)) {
Commentrates oldCommentratesOfComments = commentsNew.getCommentrates();
if (oldCommentratesOfComments != null) {
if (illegalOrphanMessages == null) {
illegalOrphanMessages = new ArrayList<String>();
}
illegalOrphanMessages.add("The Comments " + commentsNew + " already has an item of type Commentrates whose comments column cannot be null. Please make another selection for the comments field.");
}
}
if (illegalOrphanMessages != null) {
throw new IllegalOrphanException(illegalOrphanMessages);
}
if (commentsNew != null) {
commentsNew = em.getReference(commentsNew.getClass(), commentsNew.getId());
commentrates.setComments(commentsNew);
}
commentrates = em.merge(commentrates);
if (commentsOld != null && !commentsOld.equals(commentsNew)) {
commentsOld.setCommentrates(null);
commentsOld = em.merge(commentsOld);
}
if (commentsNew != null && !commentsNew.equals(commentsOld)) {
commentsNew.setCommentrates(commentrates);
commentsNew = em.merge(commentsNew);
}
em.getTransaction().commit();
} catch (Exception ex) {
String msg = ex.getLocalizedMessage();
if (msg == null || msg.length() == 0) {
Integer id = commentrates.getId();
if (findCommentrates(id) == null) {
throw new NonexistentEntityException("The commentrates 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();
Commentrates commentrates;
try {
commentrates = em.getReference(Commentrates.class, id);
commentrates.getId();
} catch (EntityNotFoundException enfe) {
throw new NonexistentEntityException("The commentrates with id " + id + " no longer exists.", enfe);
}
Comments comments = commentrates.getComments();
if (comments != null) {
comments.setCommentrates(null);
comments = em.merge(comments);
}
em.remove(commentrates);
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public List<Commentrates> findCommentratesEntities() {
return findCommentratesEntities(true, -1, -1);
}
public List<Commentrates> findCommentratesEntities(int maxResults, int firstResult) {
return findCommentratesEntities(false, maxResults, firstResult);
}
private List<Commentrates> findCommentratesEntities(boolean all, int maxResults, int firstResult) {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
cq.select(cq.from(Commentrates.class));
Query q = em.createQuery(cq);
if (!all) {
q.setMaxResults(maxResults);
q.setFirstResult(firstResult);
}
return q.getResultList();
} finally {
em.close();
}
}
public Commentrates findCommentrates(Integer id) {
EntityManager em = getEntityManager();
try {
return em.find(Commentrates.class, id);
} finally {
em.close();
}
}
public int getCommentratesCount() {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
Root<Commentrates> rt = cq.from(Commentrates.class);
cq.select(em.getCriteriaBuilder().count(rt));
Query q = em.createQuery(cq);
return ((Long) q.getSingleResult()).intValue();
} finally {
em.close();
}
}
}