MenuNavigationFacade.java
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package fi.insomnia.bortal.facade;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.insomnia.bortal.beans.EventBean;
import fi.insomnia.bortal.beans.PermissionBeanLocal;
import fi.insomnia.bortal.model.LanEvent;
import fi.insomnia.bortal.model.MenuNavigation;
import fi.insomnia.bortal.model.MenuNavigation_;
import fi.insomnia.bortal.model.Menuitem;
import fi.insomnia.bortal.model.Menuitem_;
@Stateless
@LocalBean
public class MenuNavigationFacade extends GenericFacade<Integer, MenuNavigation> {
public MenuNavigationFacade() {
super(MenuNavigation.class);
// TODO Auto-generated constructor stub
}
@EJB
private MenuitemFacade menuitemfacade;
@PersistenceContext
private EntityManager em;
@EJB
private EventBean eventbean;
@EJB
private PermissionBeanLocal permbean;
private static final Logger logger = LoggerFactory.getLogger(MenuNavigationFacade.class);
@Override
protected EntityManager getEm() {
return em;
}
public MenuNavigation find(String url, LanEvent event) {
logger.debug("Finding MenuNavigation with url {}", url);
if (url == null || url.isEmpty())
{
return null;
}
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<MenuNavigation> cq = cb.createQuery(MenuNavigation.class);
Root<MenuNavigation> root = cq.from(MenuNavigation.class);
Predicate eventFilter = null;
if (event == null)
{
eventFilter = cb.isNull(root.get(MenuNavigation_.event));
} else {
eventFilter = cb.equal(root.get(MenuNavigation_.event), event);
}
cq.where(cb.equal(root.get(MenuNavigation_.item).get(Menuitem_.url), url), eventFilter);
cq.orderBy(cb.asc(root.get(MenuNavigation_.sort)));
List<MenuNavigation> results = em.createQuery(cq).getResultList();
MenuNavigation ret = null;
for (MenuNavigation navi : results)
{
if (permbean.hasPermission(navi.getPermission()))
{
ret = navi;
}
}
if (ret == null && !results.isEmpty())
{
ret = results.get(0);
}
if (ret == null)
{
if (event != null)
{
return find(url, null);
} else {
Menuitem item = menuitemfacade.findOrCreate(url);
if (item.getNavigations() == null || item.getNavigations().isEmpty())
{
ret = new MenuNavigation();
ret.setItem(item);
ret.setEvent(null);
item.setNavigations(new ArrayList<MenuNavigation>());
item.getNavigations().add(ret);
}
}
}
return ret;
}
/**
* Returns top level navigations for BOTH default and current event Results
* have to be filtered for duplicates to get correct result!!
*
* @param event
* @return
*/
public List<MenuNavigation> findToplevels() {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<MenuNavigation> cq = cb.createQuery(MenuNavigation.class);
Root<MenuNavigation> root = cq.from(MenuNavigation.class);
Path<LanEvent> eventpath = root.get(MenuNavigation_.event);
cq.where(cb.isNull(root.get(MenuNavigation_.parent)), cb.or(cb.equal(eventpath, eventbean.getCurrentEvent()), cb.isNull(eventpath)), cb.isTrue(root.get(MenuNavigation_.visible)));
return em.createQuery(cq).getResultList();
}
public void deleteAllDefaults() {
Query q = em.createQuery("delete from MenuNavigation where parent is null");
q.executeUpdate();
}
}