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package semesterprojectv5;
import java.io.Serializable;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import javax.persistence.EntityNotFoundException;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import semesterprojectv5.exceptions.NonexistentEntityException;
/**
*
* @author alexa
*/
public class CoviddataJpaController
implements Serializable {
public CoviddataJpaController(EntityManagerFactory emf) {
this.emf = emf;
}
private EntityManagerFactory emf = null;
public EntityManager getEntityManager() {
return emf.createEntityManager();
}
public void create(Coviddata coviddata) {
EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Country country = coviddata.getCountry();
if (country != null) {
country = em.getReference(country.getClass(), country.getCountry());
coviddata.setCountry(country);
}
em.persist(coviddata);
if (country != null) {
country.getCoviddataCollection().add(coviddata);
country = em.merge(country);
}
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public void edit
(Coviddata coviddata
) throws NonexistentEntityException,
Exception { EntityManager em = null;
try {
em = getEntityManager();
em.getTransaction().begin();
Coviddata persistentCoviddata = em.find(Coviddata.class, coviddata.getCoviddata());
Country countryOld = persistentCoviddata.getCountry();
Country countryNew = coviddata.getCountry();
if (countryNew != null) {
countryNew = em.getReference(countryNew.getClass(), countryNew.getCountry());
coviddata.setCountry(countryNew);
}
coviddata = em.merge(coviddata);
if (countryOld != null && !countryOld.equals(countryNew)) {
countryOld.getCoviddataCollection().remove(coviddata);
countryOld = em.merge(countryOld);
}
if (countryNew != null && !countryNew.equals(countryOld)) {
countryNew.getCoviddataCollection().add(coviddata);
countryNew = em.merge(countryNew);
}
em.getTransaction().commit();
String msg
= ex.
getLocalizedMessage(); if (msg == null || msg.length() == 0) {
Integer id
= coviddata.
getCoviddata(); if (findCoviddata(id) == null) {
throw new NonexistentEntityException("The coviddata 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();
Coviddata coviddata;
try {
coviddata = em.getReference(Coviddata.class, id);
coviddata.getCoviddata();
} catch (EntityNotFoundException enfe) {
throw new NonexistentEntityException("The coviddata with id " + id + " no longer exists.", enfe);
}
Country country = coviddata.getCountry();
if (country != null) {
country.getCoviddataCollection().remove(coviddata);
country = em.merge(country);
}
em.remove(coviddata);
em.getTransaction().commit();
} finally {
if (em != null) {
em.close();
}
}
}
public List<Coviddata> findCoviddataEntities() {
return findCoviddataEntities(true, -1, -1);
}
public List<Coviddata> findCoviddataEntities(int maxResults, int firstResult) {
return findCoviddataEntities(false, maxResults, firstResult);
}
private List<Coviddata> findCoviddataEntities(boolean all, int maxResults, int firstResult) {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
cq.select(cq.from(Coviddata.class));
Query q = em.createQuery(cq);
if (!all) {
q.setMaxResults(maxResults);
q.setFirstResult(firstResult);
}
return q.getResultList();
} finally {
em.close();
}
}
public Coviddata findCoviddata
(Integer id
) { EntityManager em = getEntityManager();
try {
return em.find(Coviddata.class, id);
} finally {
em.close();
}
}
public int getCoviddataCount() {
EntityManager em = getEntityManager();
try {
CriteriaQuery cq = em.getCriteriaBuilder().createQuery();
Root<Coviddata> rt = cq.from(Coviddata.class);
cq.select(em.getCriteriaBuilder().count(rt));
Query q = em.createQuery(cq);
return ((Long) q.
getSingleResult()).
intValue(); } finally {
em.close();
}
}
}
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