001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/io/datastore/RequestCRSTransformationTrigger.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2007 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 Aennchenstr. 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;
044
045 import org.deegree.datatypes.QualifiedName;
046 import org.deegree.framework.log.ILogger;
047 import org.deegree.framework.log.LoggerFactory;
048 import org.deegree.framework.trigger.Trigger;
049 import org.deegree.framework.trigger.TriggerException;
050 import org.deegree.io.datastore.schema.MappedFeatureType;
051 import org.deegree.model.crs.CRSException;
052 import org.deegree.model.crs.CRSTransformationException;
053 import org.deegree.model.crs.CoordinateSystem;
054 import org.deegree.model.crs.GeoTransformer;
055 import org.deegree.model.crs.IGeoTransformer;
056 import org.deegree.model.filterencoding.ComplexFilter;
057 import org.deegree.model.filterencoding.Filter;
058 import org.deegree.model.filterencoding.FilterTools;
059 import org.deegree.model.filterencoding.SpatialOperation;
060 import org.deegree.ogcwebservices.wfs.operation.Query;
061
062 /**
063 * Trigger implementation for transformation of geometries being
064 * part of a WFS request into the CRS of the comparsion geometries
065 * at the physical datasource.
066 * <br>
067 * At th moment just support for GetFeature is implemented
068 * TODO
069 * support for update and delete requests
070 *
071 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
072 * @author last edited by: $Author: apoth $
073 *
074 * @version $Revision: 7638 $, $Date: 2007-06-25 13:00:20 +0200 (Mo, 25 Jun 2007) $
075 */
076 public class RequestCRSTransformationTrigger implements Trigger {
077
078 private static final ILogger LOG = LoggerFactory.getLogger( RequestCRSTransformationTrigger.class );
079
080 private String name;
081
082 /**
083 * @param caller calling instance
084 * @param values parameter values passed from the caller. Because
085 * RequestCRSTransformationTrigger is intented to be used as a
086 * preTrigger this will be all parameters passed to the calling
087 * method
088 */
089 public Object[] doTrigger( Object caller, Object... values ) {
090
091 Query query = (Query) values[0];
092
093 Filter filter = query.getFilter();
094
095 if ( filter instanceof ComplexFilter ) {
096 // transformations are just required if a filter is complex
097 // because FeatureID filters does not contain spatial operations
098 ComplexFilter cFilter = (ComplexFilter) filter;
099 SpatialOperation[] so = FilterTools.extractSpatialFilter( cFilter );
100 QualifiedName[] qns = query.getTypeNames();
101 IGeoTransformer gt = null;
102 for ( int i = 0; i < qns.length; i++ ) {
103 MappedFeatureType mft = ( (Datastore) caller ).getFeatureType( qns[i] );
104 CoordinateSystem targetCRS = mft.getGMLSchema().getDefaultCS();
105 for ( int j = 0; j < so.length; j++ ) {
106 CoordinateSystem sourceCRS = so[i].getGeometry().getCoordinateSystem();
107 if ( sourceCRS != null && !targetCRS.equals( sourceCRS ) ) {
108 try {
109 if ( gt == null ) {
110 gt = new GeoTransformer( targetCRS );
111 }
112 so[j].setGeometry( gt.transform( so[i].getGeometry() ) );
113 } catch ( CRSTransformationException e ) {
114 LOG.logError( e.getMessage(), e );
115 throw new TriggerException( e );
116 } catch (CRSException e) {
117 LOG.logError( e.getMessage(), e );
118 throw new TriggerException( e );
119 }
120 }
121 }
122 }
123
124 }
125
126 return values;
127 }
128
129 public String getName() {
130 return name;
131 }
132
133 public void setName( String name ) {
134 this.name = name;
135 }
136
137 /**
138 * Returns a string representation of the object.
139 *
140 * @return a string representation of the object
141 */
142 @Override
143 public String toString() {
144 return "Trigger name: " + name;
145 }
146 }