    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/model/coverage/grid/XYZGridCoverageWriter.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.model.coverage.grid;
    037
    038    import java.awt.image.BufferedImage;
    039    import java.io.IOException;
    040    import java.io.OutputStream;
    041    import java.io.PrintWriter;
    042    import java.text.DecimalFormat;
    043    import java.text.NumberFormat;
    044    import java.util.Map;
    045
    046    import org.deegree.datatypes.parameter.GeneralParameterValueIm;
    047    import org.deegree.datatypes.parameter.InvalidParameterNameException;
    048    import org.deegree.datatypes.parameter.InvalidParameterValueException;
    049    import org.deegree.datatypes.parameter.OperationParameterIm;
    050    import org.deegree.datatypes.parameter.ParameterNotFoundException;
    051    import org.deegree.graphics.transformation.GeoTransform;
    052    import org.deegree.graphics.transformation.WorldToScreenTransform;
    053    import org.deegree.model.spatialschema.Envelope;
    054    import org.deegree.processing.raster.converter.Image2RawData;
    055
    056    /**
    057     * Implementation of {@link "org.opengis.coverage.grid.GridCoverageWriter"} for writing a GridCoverage as XYZ coordinate
    058     * tuples to a defined destioation
    059     *
    060     * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
    061     * @author last edited by: $Author: mschneider $
    062     *
    063     * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    064     */
    065    public class XYZGridCoverageWriter extends AbstractGridCoverageWriter {
    066
    067        private static NumberFormat nf = new DecimalFormat( "##########.###" );
    068
    069        /**
    070         *
    071         * @param destination
    072         * @param metadata
    073         * @param subNames
    074         * @param currentSubname
    075         * @param format
    076         */
    077        public XYZGridCoverageWriter( Object destination, Map<String, Object> metadata, String[] subNames,
    078                                      String currentSubname, Format format ) {
    079            super( destination, metadata, subNames, currentSubname, format );
    080
    081        }
    082
    083        /**
    084         * disposes all resources assigned to a GMLGridCoverageWriter instance. For most cases this will be IO-resources
    085         *
    086         * @throws IOException
    087         */
    088        public void dispose()
    089                                throws IOException {
    090            // nothing happening here...
    091        }
    092
    093        /**
    094         * @param coverage
    095         * @param parameters
    096         *            must contain the servlet URL within the first field; all other fields must contain the required
    097         *            parameters for a valid GetCoverage request
    098         * @throws InvalidParameterNameException
    099         * @throws InvalidParameterValueException
    100         * @throws ParameterNotFoundException
    101         * @throws IOException
    102         */
    103        public void write( GridCoverage coverage, GeneralParameterValueIm[] parameters )
    104                                throws InvalidParameterNameException, InvalidParameterValueException,
    105                                ParameterNotFoundException, IOException {
    106
    107            int width = -1;
    108            int height = -1;
    109            for ( int i = 0; i < parameters.length; i++ ) {
    110                OperationParameterIm op = (OperationParameterIm) parameters[i].getDescriptor();
    111                String name = op.getName();
    112                if ( name.equalsIgnoreCase( "WIDTH" ) ) {
    113                    Object o = op.getDefaultValue();
    114                    width = ( (Integer) o ).intValue();
    115                } else if ( name.equalsIgnoreCase( "HEIGHT" ) ) {
    116                    Object o = op.getDefaultValue();
    117                    height = ( (Integer) o ).intValue();
    118                }
    119            }
    120
    121            PrintWriter pw = new PrintWriter( (OutputStream) destination );
    122
    123            BufferedImage im = ( (AbstractGridCoverage) coverage ).getAsImage( width, height );
    124            Image2RawData i2r = new Image2RawData( im );
    125            float[][] data = i2r.parse();
    126
    127            Envelope env = coverage.getEnvelope();
    128
    129            GeoTransform gt = new WorldToScreenTransform( env.getMin().getX(), env.getMin().getY(), env.getMax().getX(),
    130                                                          env.getMax().getY(), 0, 0, im.getWidth() - 1, im.getHeight() - 1 );
    131            double offset = 0;
    132            double scaleFactor = 1;
    133            if ( metadata.get( "offset" ) != null ) {
    134                offset = (Double) metadata.get( "offset" );
    135            }
    136            if ( metadata.get( "scaleFactor" ) != null ) {
    137                scaleFactor = (Double) metadata.get( "scaleFactor" );
    138            }
    139
    140            for ( int r = 0; r < data.length; r++ ) {
    141                for ( int c = 0; c < data[r].length; c++ ) {
    142                    double x = gt.getSourceX( c );
    143                    double y = gt.getSourceY( r );
    144                    pw.print( x );
    145                    pw.print( ' ' );
    146                    pw.print( y );
    147                    pw.print( ' ' );
    148                    double d = ( data[r][c] / scaleFactor ) - offset;
    149                    pw.print( nf.format( d ).replace( ',', '.' ) );
    150                    pw.print( "\n" );
    151                }
    152            }
    153            pw.flush();
    154        }
    155
    156    }