RoleFacade.java

package fi.insomnia.bortal.facade;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import fi.insomnia.bortal.model.LanEvent;
import fi.insomnia.bortal.model.Role;
import fi.insomnia.bortal.model.User;

@Stateless
@LocalBean
public class RoleFacade extends EventChildGenericFacade<Role> {

    @PersistenceContext
    private EntityManager em;

    public RoleFacade() {
        super(Role.class);
    }

    protected EntityManager getEm() {
        return em;
    }

    public Role findByName(String name, LanEvent event) {
        TypedQuery<Role> q = em.createNamedQuery("Role.findByRoleName", Role.class);
        q.setParameter("name", name);
        q.setParameter("event", event);
        return this.getSingleNullableResult(q);
    }

    public List<Role> findForUser(User user, LanEvent event) {
        TypedQuery<Role> q = getEm().createNamedQuery("Role.findForUser", Role.class);
        q.setParameter("user", user);
        q.setParameter("event", event);
        return q.getResultList();
    }

    public Collection<Role> findAllParentsExcluding(Collection<Role> roles, Collection<Role> excludedResults) {
        Set<Role> ret = new HashSet<Role>();
        for (Role r : roles) {
            if (!excludedResults.contains(r)) {
                ret.addAll(r.getParents());
            }
        }
        ret.removeAll(excludedResults);
        return ret;
       

    }

    public Role createRole(LanEvent event, String rolename) {
        Role ret = new Role(event);
        ret.setName(rolename);
        create(ret);
        return ret;
    }

    public List<Role> findAll(LanEvent event) {
        TypedQuery<Role> q = getEm().createNamedQuery("Role.findForEvent", Role.class);
        q.setParameter("event", event);
        return q.getResultList();
    }

}