by.bsuir.akkerman.mobile.server.dao.DaoUniversal.java Source code

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Here is the source code for by.bsuir.akkerman.mobile.server.dao.DaoUniversal.java

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package by.bsuir.akkerman.mobile.server.dao;

import by.bsuir.akkerman.mobile.server.hibernate.HibernateUtil;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;

/**
 *
 * @author Lena
 */
public class DaoUniversal {

    public boolean add(EntityHelper obj) {
        boolean isSuccessfully = false;
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        try {
            session.save(obj);
            if (obj.getParent() != null) {
                Set<EntityHelper> set = new HashSet(obj.getParent());
                for (Iterator it = set.iterator(); it.hasNext();) {
                    EntityHelper parent_obj = (EntityHelper) session.get(it.next().getClass(),
                            ((EntityHelper) it.next()).getId());
                    parent_obj.getChild().add(obj);
                    session.update(parent_obj);
                }
            }
            isSuccessfully = true;
        } catch (HibernateException ex) {
            System.out.println(ex.getMessage());
        } finally {
            session.getTransaction().commit();
        }
        return isSuccessfully;
    }

    public List<EntityHelper> read(EntityHelper obj) {
        List<EntityHelper> objectsList = new ArrayList<>();
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        try {
            objectsList = session.createQuery("from " + obj.getClass().getSimpleName()).list();
        } catch (HibernateException ex) {
            System.out.println(ex.getMessage());
        } finally {
            session.close();
        }
        return objectsList;
    }

    public boolean delete(EntityHelper obj) {
        boolean isSuccessfully = false;
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
        Session session = sessionFactory.openSession();
        session.beginTransaction();
        try {
            obj = (EntityHelper) session.get(obj.getClass(), obj.getId());
            session.delete(obj);
            if (!obj.getParent().isEmpty()) {
                Set<EntityHelper> set = new HashSet(obj.getParent());
                for (Iterator it = set.iterator(); it.hasNext();) {
                    EntityHelper parent_obj = (EntityHelper) session.get(it.next().getClass(),
                            ((EntityHelper) it.next()).getId());
                    parent_obj.getChild().add(obj);
                    session.update(parent_obj);
                }
            }
            if (obj.getParent() != null) {
                Set<EntityHelper> set = new HashSet(obj.getParent());
                for (Iterator it = set.iterator(); it.hasNext();) {
                    String[] lines = it.next().getClass().getName().split("_");
                    EntityHelper parent_obj = (EntityHelper) session.get(lines[0],
                            ((EntityHelper) it.next()).getId());
                    parent_obj.getChild().remove(obj);
                    session.update(parent_obj);
                }

            }
            isSuccessfully = true;
        } catch (HibernateException ex) {
            System.out.println(ex.getMessage());
        } finally {
            session.getTransaction().commit();
            session.close();
        }
        return isSuccessfully;
    }

    public boolean update(EntityHelper obj) {
        boolean isSuccessfully = false;
        return isSuccessfully;
    }
}