001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/io/datastore/RequestCRSTransformationTrigger.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;
037
038 import org.deegree.datatypes.QualifiedName;
039 import org.deegree.framework.log.ILogger;
040 import org.deegree.framework.log.LoggerFactory;
041 import org.deegree.framework.trigger.Trigger;
042 import org.deegree.framework.trigger.TriggerException;
043 import org.deegree.io.datastore.schema.MappedFeatureType;
044 import org.deegree.model.crs.CRSTransformationException;
045 import org.deegree.model.crs.CoordinateSystem;
046 import org.deegree.model.crs.GeoTransformer;
047 import org.deegree.model.filterencoding.ComplexFilter;
048 import org.deegree.model.filterencoding.Filter;
049 import org.deegree.model.filterencoding.FilterTools;
050 import org.deegree.model.filterencoding.SpatialOperation;
051 import org.deegree.ogcwebservices.wfs.operation.Query;
052
053 /**
054 * Trigger implementation for transformation of geometries being part of a WFS request into the CRS of the comparsion
055 * geometries at the physical datasource. <br>
056 * At th moment just support for GetFeature is implemented TODO support for update and delete requests
057 *
058 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
059 * @author last edited by: $Author: hrubach $
060 *
061 * @version $Revision: 23693 $, $Date: 2010-04-20 14:33:55 +0200 (Di, 20 Apr 2010) $
062 */
063 public class RequestCRSTransformationTrigger implements Trigger {
064
065 private static final ILogger LOG = LoggerFactory.getLogger( RequestCRSTransformationTrigger.class );
066
067 private String name;
068
069 /**
070 * @param caller
071 * calling instance
072 * @param values
073 * parameter values passed from the caller. Because RequestCRSTransformationTrigger is intented to be
074 * used as a preTrigger this will be all parameters passed to the calling method
075 */
076 public Object[] doTrigger( Object caller, Object... values ) {
077
078 Query query = (Query) values[0];
079
080 Filter filter = query.getFilter();
081
082 if ( filter instanceof ComplexFilter ) {
083 // transformations are just required if a filter is complex
084 // because FeatureID filters does not contain spatial operations
085 ComplexFilter cFilter = (ComplexFilter) filter;
086 SpatialOperation[] so = FilterTools.extractSpatialFilter( cFilter );
087 QualifiedName[] qns = query.getTypeNames();
088 GeoTransformer gt = null;
089 Datastore ds = (Datastore) caller;
090 for ( int i = 0; i < qns.length; i++ ) {
091 MappedFeatureType mft = ds.getFeatureType( qns[i] );
092 CoordinateSystem targetCRS = mft.getGMLSchema().getDefaultCS();
093 for ( int j = 0; j < so.length; j++ ) {
094 CoordinateSystem sourceCRS = so[i].getGeometry().getCoordinateSystem();
095 if ( sourceCRS != null && !targetCRS.equals( sourceCRS )
096 && !ds.canTransformTo( targetCRS.getIdentifier() ) ) {
097 try {
098 if ( gt == null ) {
099 gt = new GeoTransformer( targetCRS );
100 }
101 so[j].setGeometry( gt.transform( so[i].getGeometry() ) );
102 } catch ( CRSTransformationException e ) {
103 LOG.logError( e.getMessage(), e );
104 throw new TriggerException( e );
105 }
106 }
107 }
108 }
109
110 }
111
112 return values;
113 }
114
115 public String getName() {
116 return name;
117 }
118
119 public void setName( String name ) {
120 this.name = name;
121 }
122
123 /**
124 * Returns a string representation of the object.
125 *
126 * @return a string representation of the object
127 */
128 @Override
129 public String toString() {
130 return "Trigger name: " + name;
131 }
132 }