JPADataSourceProvider.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package  org.turro.jpa.report;
 
import java.util.List;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.data.JRAbstractBeanDataSourceProvider;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import org.turro.jpa.Dao;
 
public abstract class JPADataSourceProvider extends JRAbstractBeanDataSourceProvider {
 
  protected Dao dao;
 
  public JPADataSourceProvider(Dao dao, Class beanClass) {
    super(beanClass);
    this.dao = dao;
  }
 
  @Override
  public JRDataSource create(JasperReport report) throws JRException {
    return new JRBeanCollectionDataSource(getDataList());
  }
 
  @Override
  public void dispose(JRDataSource dataSource) throws JRException {
    // check whether lazy loads take effect
    dao.close();
  }
 
  protected abstract List getDataList();
 
}