noticefacade.java

介绍了j2ee开发常用的学习知识,如servlet,javamail,EJB等知识,并有项目源码.

/*
 * NoticeFacade.java
 *
 * Created on 2007年11月21日, 下午4:06
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.ejb;

import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 *
 * @author hyl
 */
@Stateless
public class NoticeFacade implements NoticeFacadeLocal {

    @PersistenceContext
    private EntityManager em;
    
    /** Creates a new instance of NoticeFacade */
    public NoticeFacade() {
    }

    public void create(Notice notice) {
        em.persist(notice);
    }

    public void edit(Notice notice) {
        em.merge(notice);
    }

    public void destroy(Notice notice) {
        em.merge(notice);
        em.remove(notice);
    }

    public Notice find(Object pk) {
        return (Notice) em.find(Notice.class, pk);
    }

    public List findAll() {
        return em.createQuery("select object(o) from Notice as o").getResultList();
    }
    
}