001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/tags/2.1/src/org/deegree/model/coverage/grid/OracleGeoRasterGridCoverageReader.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2006 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.model.coverage.grid;
044
045 import java.awt.image.BufferedImage;
046 import java.awt.image.RenderedImage;
047 import java.awt.image.renderable.ParameterBlock;
048 import java.io.IOException;
049
050 import javax.media.jai.InterpolationNearest;
051 import javax.media.jai.JAI;
052 import javax.media.jai.RenderedOp;
053
054 import org.deegree.datatypes.CodeList;
055 import org.deegree.datatypes.parameter.GeneralParameterValueIm;
056 import org.deegree.datatypes.parameter.InvalidParameterNameException;
057 import org.deegree.datatypes.parameter.InvalidParameterValueException;
058 import org.deegree.datatypes.parameter.OperationParameterIm;
059 import org.deegree.datatypes.parameter.ParameterNotFoundException;
060 import org.deegree.framework.log.ILogger;
061 import org.deegree.framework.log.LoggerFactory;
062 import org.deegree.framework.util.StringTools;
063 import org.deegree.io.oraclegeoraster.GeoRasterDescription;
064 import org.deegree.io.oraclegeoraster.GeoRasterReader;
065 import org.deegree.model.crs.GeoTransformer;
066 import org.deegree.model.crs.IGeoTransformer;
067 import org.deegree.model.spatialschema.Envelope;
068 import org.deegree.model.spatialschema.GeometryFactory;
069 import org.deegree.ogcwebservices.LonLatEnvelope;
070 import org.deegree.ogcwebservices.wcs.describecoverage.CoverageOffering;
071
072 /**
073 * Reader for Coverages stored in Oracle 10g GeoRaster format
074 *
075 *
076 * @version $Revision: 6259 $
077 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
078 * @author last edited by: $Author: bezema $
079 *
080 * @version 1.0. $Revision: 6259 $, $Date: 2007-03-20 10:15:15 +0100 (Di, 20 Mär 2007) $
081 *
082 * @since 2.0
083 */
084 public class OracleGeoRasterGridCoverageReader extends AbstractGridCoverageReader {
085
086 private static final ILogger LOG = LoggerFactory.getLogger( OracleGeoRasterGridCoverageReader.class );
087
088 /**
089 *
090 * @param jdbc
091 * description of the JDBC connection to a Orable DB
092 * @param table
093 * name of the table storing the GeoRaster
094 * @param column
095 * name of the column the target GeoRaster is stored
096 * @param identification
097 * a SQL where clause that identifies the target georaster
098 * @param description
099 * @param envelope
100 * @param format
101 */
102 public OracleGeoRasterGridCoverageReader( GeoRasterDescription grDesc,
103 CoverageOffering description, Envelope envelope,
104 Format format ) {
105 super( grDesc, description, envelope, format );
106 }
107
108 public void dispose()
109 throws IOException {
110
111 }
112
113 /**
114 * reads a GridCoverage from a Oracle 10g GeoRaster
115 *
116 * @param parameters -
117 */
118 public GridCoverage read( GeneralParameterValueIm[] parameters )
119 throws InvalidParameterNameException, InvalidParameterValueException,
120 ParameterNotFoundException, IOException {
121
122 float width = -1;
123 float height = -1;
124 for ( int i = 0; i < parameters.length; i++ ) {
125 OperationParameterIm op = (OperationParameterIm) parameters[i].getDescriptor();
126 String name = op.getName();
127 if ( name.equalsIgnoreCase( "WIDTH" ) ) {
128 Object o = op.getDefaultValue();
129 width = ( (Integer) o ).intValue();
130 } else if ( name.equalsIgnoreCase( "HEIGHT" ) ) {
131 Object o = op.getDefaultValue();
132 height = ( (Integer) o ).intValue();
133 }
134 }
135
136 // get the region of the georaster that intersects with the requested
137 // envelope. First field of the returned array contains the intersection
138 // envelope in the rasters native CRS; second field contains the
139 // corresponding LonLatEnvelope
140 Object[] o = getImageRegion();
141
142 GeoRasterDescription grDesc = (GeoRasterDescription) getSource();
143 RenderedImage img = null;
144 try {
145 LOG.logDebug( "reading GeoRaster from Oracle DB" );
146 img = GeoRasterReader.exportRaster( grDesc, (Envelope) o[0] );
147 } catch ( Exception e ) {
148 LOG.logError( "could not read GeoRaster: ", e );
149 throw new IOException( "could not read GeoRaster: " + e.getMessage() );
150 }
151
152 ParameterBlock pb = new ParameterBlock();
153 pb.addSource( img );
154 pb.add( width / img.getWidth() ); // The xScale
155 pb.add( height / img.getHeight() ); // The yScale
156 pb.add( 0.0F ); // The x translation
157 pb.add( 0.0F ); // The y translation
158 pb.add( new InterpolationNearest() ); // The interpolation
159 // Create the scale operation
160 RenderedOp ro = JAI.create( "scale", pb, null );
161 try {
162 img = ro.getAsBufferedImage();
163 } catch ( Exception e ) {
164 LOG.logError( "could not rescale image", e );
165 throw new IOException( "could not rescale image" + e.getMessage() );
166 }
167
168 CoverageOffering co = (CoverageOffering) description.clone();
169 co.setLonLatEnvelope( (LonLatEnvelope) o[1] );
170
171 return new ImageGridCoverage( co, (Envelope) o[0], (BufferedImage) img );
172
173 }
174
175 /**
176 * returns the region of the source image that intersects with the GridCoverage to be created as
177 * Rectange as well as the Envelope of the region in the native CRS and the LonLatEnvelope of
178 * this region.
179 *
180 * @return the region of the source image that intersects with the GridCoverage to be created as
181 * Rectange as well as the Envelope of the region in the native CRS and the
182 * LonLatEnvelope of this region.
183 */
184 private Object[] getImageRegion() {
185
186 CodeList[] cl = description.getSupportedCRSs().getNativeSRSs();
187 String code = cl[0].getCodes()[0];
188
189 LonLatEnvelope lle = description.getLonLatEnvelope();
190 Envelope tmp = GeometryFactory.createEnvelope( lle.getMin().getX(), lle.getMin().getY(),
191 lle.getMax().getX(), lle.getMax().getY(),
192 null );
193 try {
194 if ( !code.equals( "EPSG:4326" ) ) {
195 IGeoTransformer trans = new GeoTransformer( code );
196 tmp = trans.transform( tmp, "EPSG:4326" );
197 }
198 } catch ( Exception e ) {
199 LOG.logError( StringTools.stackTraceToString( e ) );
200 }
201
202 // calculate envelope of the part of the grid coverage that intersects
203 // within the image
204 Envelope env = envelope.createIntersection( tmp );
205 LonLatEnvelope lonLatEnvelope = calcLonLatEnvelope( env, code );
206
207 return new Object[] { env, lonLatEnvelope };
208 }
209
210 }
211
212 /***************************************************************************************************
213 * <code>
214 Changes to this class. What the people have been up to:
215
216 $Log$
217 Revision 1.18 2007/02/09 17:27:59 poth
218 *** empty log message ***
219
220 Revision 1.17 2007/01/26 14:55:11 wanhoff
221 fixed Javadoc @return tag and footer
222
223 Revision 1.16 2006/11/27 09:07:52 poth
224 JNI integration of proj4 has been removed. The CRS functionality now will be done by native deegree code.
225
226 Revision 1.15 2006/11/17 08:58:01 poth
227 bug fixes - setting correct interpolation
228
229 Revision 1.14 2006/11/08 17:13:46 poth
230 *** empty log message ***
231
232 Revision 1.13 2006/09/27 16:46:41 poth
233 transformation method signature changed
234
235 Revision 1.12 2006/08/29 19:54:14 poth
236 footer corrected
237
238 Revision 1.11 2006/06/30 14:16:18 poth
239 comment corrected
240
241 Revision 1.10 2006/05/03 20:09:52 poth
242 *** empty log message ***
243
244 Revision 1.9 2006/05/01 20:15:27 poth
245 *** empty log message ***
246
247 </code>
248 **************************************************************************************************/