001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/model/coverage/grid/oracle/OracleGeoRasterGridCoverageReader.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.model.coverage.grid.oracle;
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.coverage.grid.AbstractGridCoverageReader;
066 import org.deegree.model.coverage.grid.Format;
067 import org.deegree.model.coverage.grid.GridCoverage;
068 import org.deegree.model.coverage.grid.ImageGridCoverage;
069 import org.deegree.model.crs.GeoTransformer;
070 import org.deegree.model.spatialschema.Envelope;
071 import org.deegree.model.spatialschema.GeometryFactory;
072 import org.deegree.ogcwebservices.LonLatEnvelope;
073 import org.deegree.ogcwebservices.wcs.describecoverage.CoverageOffering;
074
075 /**
076 * Reader for Coverages stored in Oracle 10g GeoRaster format
077 *
078 *
079 * @version $Revision: 9436 $
080 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
081 * @author last edited by: $Author: rbezema $
082 *
083 * @version 1.0. $Revision: 9436 $, $Date: 2008-01-08 11:50:19 +0100 (Di, 08 Jan 2008) $
084 *
085 * @since 2.0
086 */
087 public class OracleGeoRasterGridCoverageReader extends AbstractGridCoverageReader {
088
089 private static final ILogger LOG = LoggerFactory.getLogger( OracleGeoRasterGridCoverageReader.class );
090
091 /**
092 *
093 * @param jdbc
094 * description of the JDBC connection to a Orable DB
095 * @param table
096 * name of the table storing the GeoRaster
097 * @param column
098 * name of the column the target GeoRaster is stored
099 * @param identification
100 * a SQL where clause that identifies the target georaster
101 * @param description
102 * @param envelope
103 * @param format
104 */
105 public OracleGeoRasterGridCoverageReader( GeoRasterDescription grDesc,
106 CoverageOffering description, Envelope envelope,
107 Format format ) {
108 super( grDesc, description, envelope, format );
109 }
110
111 public void dispose()
112 throws IOException {
113
114 }
115
116 /**
117 * reads a GridCoverage from a Oracle 10g GeoRaster
118 *
119 * @param parameters -
120 */
121 public GridCoverage read( GeneralParameterValueIm[] parameters )
122 throws InvalidParameterNameException, InvalidParameterValueException,
123 ParameterNotFoundException, IOException {
124
125 float width = -1;
126 float height = -1;
127 for ( int i = 0; i < parameters.length; i++ ) {
128 OperationParameterIm op = (OperationParameterIm) parameters[i].getDescriptor();
129 String name = op.getName();
130 if ( name.equalsIgnoreCase( "WIDTH" ) ) {
131 Object o = op.getDefaultValue();
132 width = ( (Integer) o ).intValue();
133 } else if ( name.equalsIgnoreCase( "HEIGHT" ) ) {
134 Object o = op.getDefaultValue();
135 height = ( (Integer) o ).intValue();
136 }
137 }
138
139 // get the region of the georaster that intersects with the requested
140 // envelope. First field of the returned array contains the intersection
141 // envelope in the rasters native CRS; second field contains the
142 // corresponding LonLatEnvelope
143 Object[] o = getImageRegion();
144
145 GeoRasterDescription grDesc = (GeoRasterDescription) getSource();
146 RenderedImage img = null;
147 try {
148 LOG.logDebug( "reading GeoRaster from Oracle DB" );
149 img = GeoRasterReader.exportRaster( grDesc, (Envelope) o[0] );
150 } catch ( Exception e ) {
151 LOG.logError( "could not read GeoRaster: ", e );
152 throw new IOException( "could not read GeoRaster: " + e.getMessage() );
153 }
154
155 ParameterBlock pb = new ParameterBlock();
156 pb.addSource( img );
157 pb.add( width / img.getWidth() ); // The xScale
158 pb.add( height / img.getHeight() ); // The yScale
159 pb.add( 0.0F ); // The x translation
160 pb.add( 0.0F ); // The y translation
161 pb.add( new InterpolationNearest() ); // The interpolation
162 // Create the scale operation
163 RenderedOp ro = JAI.create( "scale", pb, null );
164 try {
165 img = ro.getAsBufferedImage();
166 } catch ( Exception e ) {
167 LOG.logError( "could not rescale image", e );
168 throw new IOException( "could not rescale image" + e.getMessage() );
169 }
170
171 CoverageOffering co = (CoverageOffering) description.clone();
172 co.setLonLatEnvelope( (LonLatEnvelope) o[1] );
173
174 return new ImageGridCoverage( co, (Envelope) o[0], (BufferedImage) img );
175
176 }
177
178 /**
179 * returns the region of the source image that intersects with the GridCoverage to be created as
180 * Rectange as well as the Envelope of the region in the native CRS and the LonLatEnvelope of
181 * this region.
182 *
183 * @return the region of the source image that intersects with the GridCoverage to be created as
184 * Rectange as well as the Envelope of the region in the native CRS and the
185 * LonLatEnvelope of this region.
186 */
187 private Object[] getImageRegion() {
188
189 CodeList[] cl = description.getSupportedCRSs().getNativeSRSs();
190 String code = cl[0].getCodes()[0];
191
192 LonLatEnvelope lle = description.getLonLatEnvelope();
193 Envelope tmp = GeometryFactory.createEnvelope( lle.getMin().getX(), lle.getMin().getY(),
194 lle.getMax().getX(), lle.getMax().getY(),
195 null );
196 try {
197 if ( !code.equals( "EPSG:4326" ) ) {
198 GeoTransformer trans = new GeoTransformer( code );
199 tmp = trans.transform( tmp, "EPSG:4326" );
200 }
201 } catch ( Exception e ) {
202 LOG.logError( StringTools.stackTraceToString( e ) );
203 }
204
205 // calculate envelope of the part of the grid coverage that intersects
206 // within the image
207 Envelope env = envelope.createIntersection( tmp );
208 LonLatEnvelope lonLatEnvelope = calcLonLatEnvelope( env, code );
209
210 return new Object[] { env, lonLatEnvelope };
211 }
212
213 }