br.com.livraria.dao.ItemDAO.java Source code

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Here is the source code for br.com.livraria.dao.ItemDAO.java

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/*
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package br.com.livraria.dao;

import br.com.livraria.domain.Item;
import br.com.livraria.util.HibernateUtil;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;

/**
 *
 * @author Paulinho
 */
public class ItemDAO {

    public void salvar(Item item) {

        Session sessao = HibernateUtil.getSessionFactory().openSession();
        Transaction transacao = null;

        try {
            transacao = sessao.beginTransaction();
            sessao.save(item);
            transacao.commit();
        } catch (RuntimeException ex) {
            if (transacao != null) {
                transacao.rollback();
            }
            throw ex;
        } finally {
            sessao.close();
        }

    }

    public List<Item> listar() {
        Session sessao = HibernateUtil.getSessionFactory().openSession();
        List<Item> itens = null;

        try {
            Query consulta = sessao.getNamedQuery("Item.listar");
            itens = consulta.list();
        } catch (RuntimeException ex) {
            throw ex;
        } finally {
            sessao.close();
        }
        return itens;
    }

    public Item buscarPorCodigo(Long codigo) {
        Session sessao = HibernateUtil.getSessionFactory().openSession();
        Item item = null;

        try {

            Query consulta = sessao.getNamedQuery("Item.buscarPorCodigo");
            consulta.setLong("codigo", codigo);
            item = (Item) consulta.uniqueResult();
        } catch (RuntimeException ex) {
            throw ex;
        } finally {
            sessao.close();
        }
        return item;
    }

    public void excluir(Item item) {
        Session sessao = HibernateUtil.getSessionFactory().openSession();
        Transaction transacao = null;

        try {
            transacao = sessao.beginTransaction();
            sessao.delete(item);
            transacao.commit();
        } catch (RuntimeException ex) {
            if (transacao != null) {
                transacao.rollback();
            }
            throw ex;
        } finally {
            sessao.close();
        }
    }

    public void editar(Item item) {
        Session sessao = HibernateUtil.getSessionFactory().openSession();
        Transaction transacao = null;

        try {
            transacao = sessao.beginTransaction();
            sessao.update(item);
            transacao.commit();
        } catch (RuntimeException ex) {
            if (transacao != null) {
                transacao.rollback();
            }
            throw ex;
        } finally {
            sessao.close();
        }
    }
}