Awful thing we use for querys

public ArrayList<Object> search(String searchedClass, ArrayList<DTOCriteria> criteriaList) {
        Criteria cr = null;
        try {
            cr = HibernateUtil.getSession().createCriteria(Class.forName("entidades." + searchedClass), searchedClass.toLowerCase());
        } catch (ClassNotFoundException e) {
            System.out.println("Error creating criteria. " + e);
        }

        if (criteriaList != null) {
            for (DTOCriteria criteria : criteriaList) {
                String attribute = criteria.getAttribute();
                String operation = criteria.getOperation();
                Object value = criteria.getValue();

                switch (operation) {
                    case "=":
                        cr.add(Restrictions.conjunction(Restrictions.eq(attribute, value)));
                        break;
                    case "<":
                        cr.add(Restrictions.conjunction(Restrictions.lt(attribute, value)));
                        break;
                    case ">":
                        cr.add(Restrictions.conjunction(Restrictions.gt(attribute, value)));
                        break;
                    case "<=":
                        cr.add(Restrictions.conjunction(Restrictions.le(attribute, value)));
                        break;
                    case ">=":
                        cr.add(Restrictions.conjunction(Restrictions.ge(attribute, value)));
                        break;
                    case "<>":
                        cr.add(Restrictions.conjunction(Restrictions.ne(attribute, value)));
                        break;
                    case "contains":
                        //Every collection have to be named: classList
                        //Generate the collection name using the viariable "attribute"
                        String list = String.valueOf(attribute.charAt(0))
                                .toLowerCase() + attribute.substring(1) + "List"; //ex: materialList
                        cr.createAlias(list, "list")
                                .add(Restrictions.conjunction(Restrictions.eq("list.OID"
                                        + searchedClass, ((entidades.Entity) value).getOid())));
                        break;
                }
            }
        }
        return (ArrayList) cr.list();
}