001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/framework/util/DataBaseIDGenerator.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.framework.util;
037
038 import java.sql.SQLException;
039
040 /**
041 * This interface defines a generator for unique values for the primary key in a database table.
042 * <p>
043 * NOTE: At the moment, every application has to take care of locking the table to prevent problems
044 * in multithreaded or multihosted applications.
045 * <p>
046 *
047 * @author Markus Schneider <a href="mailto:mschneider@lat-lon.de">Markus Schneider</a>
048 * @version $Revision: 18195 $ $Date: 2009-06-18 17:55:39 +0200 (Do, 18 Jun 2009) $
049 */
050 public interface DataBaseIDGenerator {
051
052 /**
053 * Generates a new Id, suitable as a primary key for the next dataset.
054 * <p>
055 *
056 * @return Id, the object type depends on the database field used as primary key
057 * @throws SQLException if for some reason a problem was encountered
058 */
059 public Object generateUniqueId()
060 throws SQLException;
061 }