ecommerce.dao.Dao.java Source code

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Here is the source code for ecommerce.dao.Dao.java

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/*
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package ecommerce.dao;

import ecommerce.HibernateUtil;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Restrictions;

/**
 *
 * @author Bruno
 */
public abstract class Dao<T> {
    private Class classe;

    public Dao(Class classe) {
        this.classe = classe;
    }

    protected void salvarOuAtualizar(T objeto) {
        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();
        session.saveOrUpdate(objeto);
        session.getTransaction().commit();
    }

    public void inserir(T objeto) {
        salvarOuAtualizar(objeto);
    }

    public void alterar(T objeto) {
        salvarOuAtualizar(objeto);
    }

    public void excluir(T objeto) {
        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.getTransaction().begin();
        session.delete(objeto);
        session.getTransaction().commit();
    }

    public T consultar(Object chave) {
        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();
        T objeto = (T) session.createCriteria(classe).add(Restrictions.idEq(chave)).uniqueResult();
        session.getTransaction().commit();
        return objeto;
    }

    public List<T> listar() {
        Session session = HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();
        Criteria criteria = session.createCriteria(classe);
        criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
        List<T> lista = criteria.list();
        session.getTransaction().commit();
        return lista;
    }

}