br.edu.ifes.bd2hibernate.cgd.DAO.java Source code

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Here is the source code for br.edu.ifes.bd2hibernate.cgd.DAO.java

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package br.edu.ifes.bd2hibernate.cgd;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Example;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Restrictions;

/**
 *
 * @author aleao
 */
public abstract class DAO {

    public void inserir(Object obj, Class c) {
        Session s = HibernateUtil.getSession();
        HibernateUtil.begin();

        s.save(c.cast(obj));

        HibernateUtil.commit();
        HibernateUtil.close();
    }

    public void atualizar(Object obj, Class c) {
        Session s = HibernateUtil.getSession();
        HibernateUtil.begin();

        s.update(c.cast(obj));

        HibernateUtil.commit();
        HibernateUtil.close();
    }

    public void deletar(int id, Class c) {
        Session s = HibernateUtil.getSession();
        HibernateUtil.begin();

        Object o = c.cast(s.load(c, new Integer(id)));
        s.delete(c.cast(o));

        HibernateUtil.commit();
        HibernateUtil.close();
    }

    public void deletar(Object obj, Class c) {
        Session s = HibernateUtil.getSession();
        HibernateUtil.begin();

        s.delete(c.cast(obj));

        HibernateUtil.commit();
        HibernateUtil.close();
    }

    public List<?> selecionarTodos(Class c) {
        List listObj = new ArrayList();

        try {
            Session s = HibernateUtil.getSession();
            HibernateUtil.begin();

            Query query = s.createQuery("from " + c.getName());
            listObj = query.list();

            HibernateUtil.commit();
            HibernateUtil.close();
            return listObj;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return listObj;
    }

    public List<?> selecionar(Class c, Field f, String value) {
        List listObj = new ArrayList();

        try {
            Session s = HibernateUtil.getSession();
            HibernateUtil.begin();

            listObj = s.createCriteria(c)
                    .add(Restrictions.like(c.getSimpleName() + "." + f.getName(), value, MatchMode.ANYWHERE))
                    .list();

            HibernateUtil.commit();
            HibernateUtil.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return listObj;
    }

    public List<?> selecionar(Class c, Object o) {
        List listObj = new ArrayList();
        try {
            Session s = HibernateUtil.getSession();
            HibernateUtil.begin();

            listObj = s.createCriteria(c).add(Example.create(o).excludeZeroes()).list();

            HibernateUtil.commit();
            HibernateUtil.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return listObj;
    }

    public Object selecionar(int id, Class c) {
        Object o = null;
        try {

            Session s = HibernateUtil.getSession();
            HibernateUtil.begin();

            o = s.get(c, id);

            HibernateUtil.commit();
            HibernateUtil.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return o;
    }
}