001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/io/datastore/RequestCRSTransformationTrigger.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 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.CRSTransformationException;
052 import org.deegree.model.crs.CoordinateSystem;
053 import org.deegree.model.crs.GeoTransformer;
054 import org.deegree.model.crs.UnknownCRSException;
055 import org.deegree.model.filterencoding.ComplexFilter;
056 import org.deegree.model.filterencoding.Filter;
057 import org.deegree.model.filterencoding.FilterTools;
058 import org.deegree.model.filterencoding.SpatialOperation;
059 import org.deegree.ogcwebservices.wfs.operation.Query;
060
061 /**
062 * Trigger implementation for transformation of geometries being
063 * part of a WFS request into the CRS of the comparsion geometries
064 * at the physical datasource.
065 * <br>
066 * At th moment just support for GetFeature is implemented
067 * TODO
068 * support for update and delete requests
069 *
070 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
071 * @author last edited by: $Author: rbezema $
072 *
073 * @version $Revision: 9442 $, $Date: 2008-01-08 11:59:30 +0100 (Di, 08 Jan 2008) $
074 */
075 public class RequestCRSTransformationTrigger implements Trigger {
076
077 private static final ILogger LOG = LoggerFactory.getLogger( RequestCRSTransformationTrigger.class );
078
079 private String name;
080
081 /**
082 * @param caller calling instance
083 * @param values parameter values passed from the caller. Because
084 * RequestCRSTransformationTrigger is intented to be used as a
085 * preTrigger this will be all parameters passed to the calling
086 * method
087 */
088 public Object[] doTrigger( Object caller, Object... values ) {
089
090 Query query = (Query) values[0];
091
092 Filter filter = query.getFilter();
093
094 if ( filter instanceof ComplexFilter ) {
095 // transformations are just required if a filter is complex
096 // because FeatureID filters does not contain spatial operations
097 ComplexFilter cFilter = (ComplexFilter) filter;
098 SpatialOperation[] so = FilterTools.extractSpatialFilter( cFilter );
099 QualifiedName[] qns = query.getTypeNames();
100 GeoTransformer gt = null;
101 for ( int i = 0; i < qns.length; i++ ) {
102 MappedFeatureType mft = ( (Datastore) caller ).getFeatureType( qns[i] );
103 CoordinateSystem targetCRS = mft.getGMLSchema().getDefaultCS();
104 for ( int j = 0; j < so.length; j++ ) {
105 CoordinateSystem sourceCRS = so[i].getGeometry().getCoordinateSystem();
106 if ( sourceCRS != null && !targetCRS.equals( sourceCRS ) ) {
107 try {
108 if ( gt == null ) {
109 gt = new GeoTransformer( targetCRS );
110 }
111 so[j].setGeometry( gt.transform( so[i].getGeometry() ) );
112 } catch ( CRSTransformationException e ) {
113 LOG.logError( e.getMessage(), e );
114 throw new TriggerException( e );
115 }
116 }
117 }
118 }
119
120 }
121
122 return values;
123 }
124
125 public String getName() {
126 return name;
127 }
128
129 public void setName( String name ) {
130 this.name = name;
131 }
132
133 /**
134 * Returns a string representation of the object.
135 *
136 * @return a string representation of the object
137 */
138 @Override
139 public String toString() {
140 return "Trigger name: " + name;
141 }
142 }