001: //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/trunk/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 04:32:57 -0800 (Thu, 27 Dec 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)
082: throws IdGenerationException {
083: throw new UnsupportedOperationException(
084: "ParentIDGenerator cannot be used to generate primary keys (that are no feature ids).");
085: }
086:
087: /**
088: * Returns a new id for a feature of the given type.
089: *
090: * @param ft
091: * (mapped) feature type (irrelevant for this generator)
092: * @param ta
093: * datastore transaction (context)
094: * @return a new feature id.
095: * @throws IdGenerationException
096: */
097: @Override
098: public FeatureId getNewId(MappedFeatureType ft,
099: DatastoreTransaction ta) throws IdGenerationException {
100: throw new UnsupportedOperationException(
101: "ParentIDGenerator cannot be used to generate feature ids (without information on the parent feature.");
102: }
103: }
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