/*

 *   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 = ?");

	}

}