    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/io/datastore/idgenerator/ParentIDGenerator.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.io.datastore.idgenerator;
    037
    038    import java.util.Properties;
    039
    040    import org.deegree.io.datastore.DatastoreTransaction;
    041    import org.deegree.io.datastore.FeatureId;
    042    import org.deegree.io.datastore.schema.MappedFeatureType;
    043
    044    /**
    045     * {@link IdGenerator} that takes the {@link FeatureId} of the parent feature.
    046     *
    047     * @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
    048     * @author last edited by: $Author: mschneider $
    049     *
    050     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    051     */
    052    public class ParentIDGenerator extends IdGenerator {
    053
    054        /**
    055         * Creates a new <code>ParentIDGenerator</code> instance.
    056         *
    057         * @param params
    058         *            configuration parameters
    059         */
    060        public ParentIDGenerator (Properties params) {
    061            super (params);
    062        }
    063
    064        /**
    065         * Returns a new primary key.
    066         *
    067         * @param ta
    068         *            datastore transaction (context)
    069         * @return a new primary key.
    070         * @throws IdGenerationException
    071         *             if the generation of the id could not be performed
    072         */
    073        @Override
    074        public String getNewId( DatastoreTransaction ta ) throws IdGenerationException {
    075            throw new UnsupportedOperationException(
    076                "ParentIDGenerator cannot be used to generate primary keys (that are no feature ids)." );
    077        }
    078
    079        /**
    080         * Returns a new id for a feature of the given type.
    081         *
    082         * @param ft
    083         *            (mapped) feature type (irrelevant for this generator)
    084         * @param ta
    085         *            datastore transaction (context)
    086         * @return a new feature id.
    087         * @throws IdGenerationException
    088         */
    089        @Override
    090        public FeatureId getNewId(  MappedFeatureType ft, DatastoreTransaction ta ) throws IdGenerationException {
    091            throw new UnsupportedOperationException(
    092                "ParentIDGenerator cannot be used to generate feature ids (without information on the parent feature." );
    093        }
    094    }