SitePageFacade.java
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package fi.insomnia.bortal.facade;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.ListJoin;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import fi.insomnia.bortal.beans.EventBeanLocal;
import fi.insomnia.bortal.model.Role;
import fi.insomnia.bortal.model.Role_;
import fi.insomnia.bortal.model.SitePage;
import fi.insomnia.bortal.model.SitePage_;
import fi.insomnia.bortal.model.User;
@Stateless
public class SitePageFacade extends GenericFacade<Integer, SitePage> {
@PersistenceContext
private EntityManager em;
@EJB
private EventBeanLocal eventbean;
public SitePageFacade() {
super(SitePage.class);
}
@Override
protected EntityManager getEm() {
return em;
}
public SitePage find(String siteName) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<SitePage> cq = cb.createQuery(SitePage.class);
Root<SitePage> root = cq.from(SitePage.class);
cq.where(cb.equal(root.get(SitePage_.name), siteName),
cb.equal(root.get(SitePage_.event), eventbean.getCurrentEvent())
);
return getSingleNullableResult(em.createQuery(cq));
}
public List<SitePage> findForUser(User user, SitePage siteroot) {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<SitePage> cq = cb.createQuery(SitePage.class);
Root<SitePage> root = cq.from(SitePage.class);
ListJoin<Role, User> usrpath = root.join(SitePage_.allowedRoles).join(Role_.users);
Path<SitePage> parentpath = root.get(SitePage_.parent);
Predicate rootpred = null;
if (parentpath == null)
{
rootpred = cb.isNull(parentpath);
}
else
{
rootpred = cb.equal(parentpath, parentpath);
}
cq.where(
cb.equal(usrpath, user),
rootpred,
cb.equal(root.get(SitePage_.event), eventbean.getCurrentEvent())
);
return em.createQuery(cq).getResultList();
}
@Override
public List<SitePage> findAll()
{
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<SitePage> cq = cb.createQuery(SitePage.class);
Root<SitePage> root = cq.from(SitePage.class);
cq.where(
cb.isNull(root.get(SitePage_.parent)),
cb.equal(root.get(SitePage_.event), eventbean.getCurrentEvent())
);
return em.createQuery(cq).getResultList();
}
}