/*
* Copyright (C) 2003-2009 eXo Platform SAS.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.exoplatform.ks.common.jcr;
import javax.jcr.Session;
import org.exoplatform.commons.utils.ListAccess;
/**
* Basis for JCR-based list access.
* Acquires and releases system sessions on default workspace.
*
* @author <a href="mailto:patrice.lamarque@exoplatform.com">Patrice Lamarque</a>
* @version $Revision$
*/
public abstract class JCRListAccess<E> implements ListAccess<E> {
protected SessionManager manager;
public JCRListAccess(SessionManager manager) {
this.manager = manager;
}
public E[] load(int index, int length) throws Exception, IllegalArgumentException {
Session session = manager.openSession();
try {
return load(session, index, length);
} finally {
manager.closeSession();
}
}
public int getSize() throws Exception {
Session session = manager.openSession();
try {
return getSize(session);
} finally {
manager.closeSession();
}
}
protected abstract E[] load(Session session, int index, int length) throws Exception, IllegalArgumentException;
protected abstract int getSize(Session session) throws Exception;
}