001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/io/datastore/idgenerator/ParentIDGenerator.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstraße 19
030 53177 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042 ---------------------------------------------------------------------------*/
043 package org.deegree.io.datastore.idgenerator;
044
045 import java.util.Properties;
046
047 import org.deegree.io.datastore.DatastoreTransaction;
048 import org.deegree.io.datastore.FeatureId;
049 import org.deegree.io.datastore.schema.MappedFeatureType;
050
051 /**
052 * {@link IdGenerator} that takes the {@link FeatureId} of the parent feature.
053 *
054 * @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
055 * @author last edited by: $Author: apoth $
056 *
057 * @version $Revision: 9342 $, $Date: 2007-12-27 13:32:57 +0100 (Do, 27 Dez 2007) $
058 */
059 public class ParentIDGenerator extends IdGenerator {
060
061 /**
062 * Creates a new <code>ParentIDGenerator</code> instance.
063 *
064 * @param params
065 * configuration parameters
066 */
067 public ParentIDGenerator (Properties params) {
068 super (params);
069 }
070
071 /**
072 * Returns a new primary key.
073 *
074 * @param ta
075 * datastore transaction (context)
076 * @return a new primary key.
077 * @throws IdGenerationException
078 * if the generation of the id could not be performed
079 */
080 @Override
081 public String getNewId( DatastoreTransaction ta ) throws IdGenerationException {
082 throw new UnsupportedOperationException(
083 "ParentIDGenerator cannot be used to generate primary keys (that are no feature ids)." );
084 }
085
086 /**
087 * Returns a new id for a feature of the given type.
088 *
089 * @param ft
090 * (mapped) feature type (irrelevant for this generator)
091 * @param ta
092 * datastore transaction (context)
093 * @return a new feature id.
094 * @throws IdGenerationException
095 */
096 @Override
097 public FeatureId getNewId( MappedFeatureType ft, DatastoreTransaction ta ) throws IdGenerationException {
098 throw new UnsupportedOperationException(
099 "ParentIDGenerator cannot be used to generate feature ids (without information on the parent feature." );
100 }
101 }