/*

  *   SONEWS News Server

  *   see AUTHORS for the list of contributors

  *

  *   This program 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.

  *

  *   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.sonews.storage.impl;

 import java.sql.SQLException;

 import org.sonews.storage.Channel;

 import org.sonews.storage.Storage;

 import org.sonews.storage.StorageBackendException;

 /**

  * A specialized JDBCDatabase supporting HSQLDB.

  * @author Christian Lins

  * @since sonews/1.1

  */

 public class HSQLDB extends JDBCDatabase implements Storage {

 	@Override

 	protected void prepareAddGroupStatement() throws SQLException {

 		this.pstmtAddGroup0 = conn.prepareStatement(

 				"INSERT INTO groups (name, flags, group_id) VALUES (?, ?, IDENTITY())");

 	}

 	@Override

 	protected void prepareCountGroupsStatement() throws SQLException {

 		this.pstmtCountGroups = conn.prepareStatement(

 				"SELECT Count(group_id) FROM groups WHERE "

 				+ "BITAND(flags, " + Channel.DELETED + ") = 0");

 	}

 	@Override

 	protected void prepareGetPostingsCountStatement() throws SQLException {

 		this.pstmtGetPostingsCount = conn.prepareStatement(

 				"SELECT Count(*) FROM postings JOIN groups "

 				+ "ON groups.name = ? GROUP BY groups.name");

 	}

 	@Override

 	protected void prepareGetSubscriptionsStatement() throws SQLException {

 		this.pstmtGetSubscriptions = conn.prepareStatement(

 				"SELECT * FROM (SELECT feedtype, host, port, peer_id FROM peers JOIN "

 				+ "peer_subscriptions ON peers.peer_id = peer_subscriptions.peer_id) "

 				+ "JOIN groups ON group_id = groups.group_id WHERE feedtype = ?");

 	}

 }