EJB3.0-2

java 代码

package com.pdager.persist;

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

public @Stateless
class PersistenceFacadeBean implements PersistenceFacade {

    @PersistenceContext
    private EntityManager manager;

    public <T> T get(Class<T> t, Object primaryKey) {
        return manager.find(t, primaryKey);// TODO Auto-generated method stub
    }

    public void persist(Object o) {
        manager.persist(o);
    }

    public void update(Object o) {
        manager.persist(o);

    }

    public void refresh(Object o) {
        manager.refresh(o);

    }

    public void remove(Object o) {
        if (o != null)
            manager.remove(o);
    }

    public Object merge(Object o) {
        manager.merge(o);
        return o;
    }

    public List query(String q) {
        return manager.createQuery(q).getResultList();
    }

    public Object querySingle(String q) {
        return manager.createQuery(q).getSingleResult();
    }

    public void remove(Class t, Serializable id) {
        // TODO Auto-generated method stub

    }

}