001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/graphics/OWSRasterLayer.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.graphics;
037    
038    import java.awt.image.BufferedImage;
039    import java.io.IOException;
040    import java.net.URL;
041    
042    import org.deegree.framework.log.ILogger;
043    import org.deegree.framework.log.LoggerFactory;
044    import org.deegree.framework.util.ImageUtils;
045    import org.deegree.model.coverage.grid.GridCoverage;
046    import org.deegree.model.coverage.grid.ImageGridCoverage;
047    import org.deegree.model.crs.CoordinateSystem;
048    import org.deegree.model.spatialschema.Envelope;
049    
050    /**
051     * 
052     * 
053     * 
054     * @version $Revision: 19454 $
055     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
056     * @author last edited by: $Author: apoth $
057     * 
058     * @version $Revision: 19454 $, $Date: 2009-09-01 14:27:33 +0200 (Di, 01 Sep 2009) $
059     */
060    public class OWSRasterLayer extends AbstractLayer {
061    
062        private ILogger LOG = LoggerFactory.getLogger( OWSRasterLayer.class );
063    
064        private URL baseURL;
065    
066        private Envelope envelope;
067    
068        /**
069         * 
070         * @param name
071         * @param baseURL
072         * @throws Exception
073         */
074        public OWSRasterLayer( String name, URL baseURL ) throws Exception {
075            super( name );
076            this.baseURL = baseURL;
077        }
078    
079        /**
080         * @param crs
081         * @throws Exception
082         * 
083         */
084        public void setCoordinatesSystem( CoordinateSystem crs )
085                                throws Exception {
086            // not supported yet
087        }
088    
089        /*
090         * (non-Javadoc)
091         * 
092         * @see org.deegree.graphics.AbstractLayer#getBoundingBox()
093         */
094        @Override
095        public Envelope getBoundingBox() {
096            return envelope;
097        }
098    
099        /**
100         * 
101         * @param envelope
102         * @param w
103         *            width of image
104         * @param h
105         *            height of image
106         * @return grid coverage for envelope and size
107         * @throws IOException
108         */
109        public GridCoverage getRaster( Envelope envelope, double w, double h )
110                                throws IOException {
111    
112            this.envelope = envelope;
113            StringBuffer sb = new StringBuffer( 150 );
114            sb.append( baseURL );
115            appendBoxParamtersToBuffer( sb, envelope, (int) w, (int) h );
116    
117            URL u = new URL( sb.toString() );
118    
119            GridCoverage gc = null;
120            try {
121                BufferedImage img = ImageUtils.loadImage( u );
122    
123                gc = new ImageGridCoverage( null, envelope, img );
124    
125            } catch ( Exception e ) {
126                LOG.logDebug( "Error getting raster data: " + e.getMessage() );
127            }
128            return gc;
129        }
130    
131        private void appendBoxParamtersToBuffer( StringBuffer sb, Envelope env, int w, int h ) {
132    
133            sb.append( "&BBOX=" ).append( env.getMin().getX() ).append( "," ).append( env.getMin().getY() );
134            sb.append( "," ).append( env.getMax().getX() ).append( "," ).append( env.getMax().getY() );
135            sb.append( "&WIDTH=" ).append( w ).append( "&HEIGHT=" ).append( h );
136        }
137    
138    }