GenericDataModel.java

/*
 *   This file is part of SGEA - Sistema de Gestão de Eventos Acadêmicos - TADS IFNMG Campus Januária.
 *
 *   SGEA is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   SGEA is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with SGEA.  If not, see <http://www.gnu.org/licenses/>.
 */
package br.edu.ifnmg.GerenciamentoEventos.Aplicacao;



import br.edu.ifnmg.DomainModel.Entidade;
import br.edu.ifnmg.DomainModel.Services.Repositorio;
import java.util.List;
import javax.faces.model.ListDataModel;
import org.primefaces.model.SelectableDataModel;

public class GenericDataModel<T extends Entidade> extends ListDataModel<T> implements SelectableDataModel<T> {

    Repositorio<T> dao;

    public GenericDataModel(Repositorio<T> repo) {
        dao = repo;
    }

    public GenericDataModel(List<T> data, Repositorio<T> repo) {
        super(data);
        dao = repo;
    }

    @Override
    public T getRowData(String rowKey) {
        //In a real app, a more efficient way like a query by rowKey should be implemented to deal with huge data  

        if (rowKey == null || rowKey.equals("")) {
            return null;
        }

        try {
            Long id = Long.parseLong(rowKey);

            T obj = dao.Abrir(id);

            return obj;
        } catch (Exception ex) {
            return null;
        }
    }

    @Override
    public Object getRowKey(T obj) {
        Entidade t = (Entidade)obj;
        return t.getId();
    }
}