package pl.polsl.aei.SystemPraktyk.server;

import java.util.ArrayList;
import java.util.List;

import pl.polsl.aei.SystemPraktyk.model.utils.HibernateUtil;

public class HibernateHelper {

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static <A,B> List<B> query(A classDB, B classDTO) {

        org.hibernate.Session s = null;
        List<B> listDBO = new ArrayList<B>();

        try {
            s = HibernateUtil.getSessionFactory()
                    .openSession();

            List items = s.createCriteria(classDB.getClass()).list();
            for(Object o : items)
            {
                if(o.getClass().isAssignableFrom(classDB.getClass()))
                {
                    listDBO.add((B) classDTO.getClass().getDeclaredConstructor(classDB.getClass()).newInstance(o));
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        finally
        {
            if(s != null)
                s.close();
        }
        return listDBO;
    }
}