/* * To change this template, choose Tools | Templates * and open the template in the editor. */package com.sysu.service;import com.sysu.pojo.Administrator;import java.util.List;import javax.ejb.Stateless;import javax.persistence.EntityManager;import javax.persistence.PersistenceContext;/** * * @author Levi Wong */@Statelesspublic class AdministratorFacade implements AdministratorFacadeRemote {    @PersistenceContext    private EntityManager em;    public void create(Administrator administrator) {        em.persist(administrator);    }    public void edit(Administrator administrator) {        em.merge(administrator);    }    public void remove(Administrator administrator) {        em.remove(em.merge(administrator));    }    public Administrator find(Object id) {        return em.find(Administrator.class, id);    }    public List<Administrator> findAll() {        return em.createQuery("select object(o) from Administrator as o").getResultList();    }}