001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/model/coverage/grid/GMLGridCoverageWriter.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.io.IOException;
039 import java.io.OutputStream;
040 import java.net.URL;
041 import java.util.List;
042 import java.util.Map;
043
044 import org.deegree.datatypes.parameter.GeneralParameterValueIm;
045 import org.deegree.datatypes.parameter.InvalidParameterNameException;
046 import org.deegree.datatypes.parameter.InvalidParameterValueException;
047 import org.deegree.datatypes.parameter.OperationParameterIm;
048 import org.deegree.datatypes.parameter.ParameterNotFoundException;
049 import org.deegree.framework.log.ILogger;
050 import org.deegree.framework.log.LoggerFactory;
051 import org.deegree.framework.xml.NamespaceContext;
052 import org.deegree.framework.xml.XMLFragment;
053 import org.deegree.framework.xml.XMLParsingException;
054 import org.deegree.framework.xml.XMLTools;
055 import org.deegree.ogcbase.CommonNamespaces;
056 import org.w3c.dom.Element;
057 import org.w3c.dom.Node;
058
059 /**
060 * Implementation of {@link "org.opengis.coverage.grid.GridCoverageWriter"} for writing a GridCoverage as GML document
061 * to a defined destioation
062 *
063 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
064 * @author last edited by: $Author: mschneider $
065 *
066 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
067 */
068 public class GMLGridCoverageWriter extends AbstractGridCoverageWriter {
069
070 private static ILogger LOG = LoggerFactory.getLogger( GMLGridCoverageWriter.class );
071
072 private URL template = GMLGridCoverageWriter.class.getResource( "gml_rectifiedgrid_template.xml" );
073
074 /**
075 *
076 * @param destination
077 * @param metadata
078 * @param subNames
079 * @param currentSubname
080 * @param format
081 */
082 public GMLGridCoverageWriter( Object destination, Map<String, Object> metadata, String[] subNames,
083 String currentSubname, Format format ) {
084 super( destination, metadata, subNames, currentSubname, format );
085
086 }
087
088 /**
089 * disposes all resources assigned to a GMLGridCoverageWriter instance. For most cases this will be IO-resources
090 *
091 * @throws IOException
092 */
093 public void dispose()
094 throws IOException {
095 // nothing here, why does it exist?
096 }
097
098 /**
099 * @param coverage
100 * @param parameters
101 * must contain the servlet URL within the first field; all other fields must contain the required
102 * parameters for a valid GetCoverage request
103 * @throws InvalidParameterNameException
104 * @throws InvalidParameterValueException
105 * @throws ParameterNotFoundException
106 * @throws IOException
107 */
108 public void write( GridCoverage coverage, GeneralParameterValueIm[] parameters )
109 throws InvalidParameterNameException, InvalidParameterValueException,
110 ParameterNotFoundException, IOException {
111 XMLFragment xml = new XMLFragment();
112 try {
113 xml.load( template );
114 Element root = xml.getRootElement();
115 NamespaceContext nsc = CommonNamespaces.getNamespaceContext();
116
117 String xpath = "gml:rectifiedGridDomain/gml:RectifiedGrid/gml:limits/gml:GridEnvelope/gml:low";
118 Element element = (Element) XMLTools.getNode( root, xpath, nsc );
119 double x = coverage.getEnvelope().getMin().getX();
120 double y = coverage.getEnvelope().getMin().getY();
121 Node node = root.getOwnerDocument().createTextNode( Double.toString( x ) + ' ' + Double.toString( y ) );
122 element.appendChild( node );
123
124 xpath = "gml:rectifiedGridDomain/gml:RectifiedGrid/gml:limits/gml:GridEnvelope/gml:high";
125 element = (Element) XMLTools.getNode( root, xpath, nsc );
126 x = coverage.getEnvelope().getMax().getX();
127 y = coverage.getEnvelope().getMax().getY();
128 node = root.getOwnerDocument().createTextNode( Double.toString( x ) + ' ' + Double.toString( y ) );
129 element.appendChild( node );
130
131 xpath = "gml:rectifiedGridDomain/gml:RectifiedGrid/gml:origin/gml:Point";
132 element = (Element) XMLTools.getNode( root, xpath, nsc );
133 element.setAttribute( "srsName", coverage.getCoordinateReferenceSystem().getIdentifier() );
134
135 xpath = "gml:rectifiedGridDomain/gml:RectifiedGrid/gml:origin/gml:Point/gml:pos";
136 element = (Element) XMLTools.getNode( root, xpath, nsc );
137 x = coverage.getEnvelope().getMin().getX();
138 y = coverage.getEnvelope().getMin().getY();
139 node = root.getOwnerDocument().createTextNode( Double.toString( x ) + ' ' + Double.toString( y ) );
140 element.appendChild( node );
141
142 double[] res = calcGridResolution( coverage, parameters );
143
144 xpath = "gml:rectifiedGridDomain/gml:RectifiedGrid/gml:offsetVector";
145 List<Element> list = XMLTools.getElements( root, xpath, nsc );
146 for ( int i = 0; i < list.size(); i++ ) {
147 element = list.get( i );
148 element.setAttribute( "srsName", coverage.getCoordinateReferenceSystem().getIdentifier() );
149 if ( i == 0 ) {
150 node = root.getOwnerDocument().createTextNode( res[i] + " 0" );
151 element.appendChild( node );
152 } else if ( i == 1 ) {
153 node = root.getOwnerDocument().createTextNode( "0 " + res[i] );
154 element.appendChild( node );
155 } else if ( i == 2 ) {
156 node = root.getOwnerDocument().createTextNode( "0 0 " + res[i] );
157 element.appendChild( node );
158 }
159 }
160
161 xpath = "gml:rangeSet/gml:File/gml:fileName";
162 element = (Element) XMLTools.getNode( root, xpath, nsc );
163 StringBuffer sb = new StringBuffer( 300 );
164 OperationParameterIm op = (OperationParameterIm) parameters[0].getDescriptor();
165 sb.append( op.getDefaultValue() ).append( '?' );
166 for ( int i = 1; i < parameters.length; i++ ) {
167 // OperationParameter
168 op = (OperationParameterIm) parameters[i].getDescriptor();
169 sb.append( op.getName() );
170 sb.append( '=' ).append( op.getDefaultValue() );
171 if ( i < parameters.length - 1 ) {
172 sb.append( '&' );
173 }
174 }
175 node = root.getOwnerDocument().createCDATASection( sb.toString() );
176 element.appendChild( node );
177 } catch ( XMLParsingException e ) {
178 LOG.logError( "could not parse GMLGridCoverage response template", e );
179 throw new InvalidParameterValueException( "", e.getMessage(), "" );
180 } catch ( Exception e ) {
181 LOG.logError( "could not write GMLGridCoverage", e );
182 throw new InvalidParameterValueException( "", e.getMessage(), "" );
183 }
184 xml.write( ( (OutputStream) destination ) );
185
186 }
187
188 /**
189 * returns the resolution of the grid in x- and y- directory
190 *
191 * @param coverage
192 * @param parameters
193 * @return the resolution of the grid in x- and y- directory
194 */
195 private double[] calcGridResolution( GridCoverage coverage, GeneralParameterValueIm[] parameters ) {
196 double wx = coverage.getEnvelope().getMax().getX() - coverage.getEnvelope().getMin().getX();
197 double wy = coverage.getEnvelope().getMax().getY() - coverage.getEnvelope().getMin().getY();
198 Integer width = (Integer) getNamedParameter( parameters, "width" ).getDefaultValue();
199 Integer height = (Integer) getNamedParameter( parameters, "height" ).getDefaultValue();
200 double dx = wx / width.doubleValue();
201 double dy = wy / height.doubleValue();
202 double[] res = new double[] { dx, dy };
203 return res;
204 }
205
206 /**
207 * selects the parameter matching the passed name from the passed array
208 *
209 * @param parameters
210 * @param name
211 * @return the parameter
212 */
213 private OperationParameterIm getNamedParameter( GeneralParameterValueIm[] parameters, String name ) {
214 for ( int i = 0; i < parameters.length; i++ ) {
215 // OperationParameter
216 OperationParameterIm op = (OperationParameterIm) parameters[i].getDescriptor();
217 if ( op.getName().equals( name ) ) {
218 return op;
219 }
220 }
221 return null;
222 }
223
224 }