001    //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/portal/standard/wmps/PrintWMPSListener.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.portal.standard.wmps;
037    
038    import java.io.IOException;
039    import java.io.InputStream;
040    import java.net.URL;
041    import java.util.ArrayList;
042    import java.util.Collections;
043    import java.util.Iterator;
044    import java.util.List;
045    import java.util.Map;
046    
047    import org.deegree.enterprise.control.ajax.AbstractListener;
048    import org.deegree.enterprise.control.ajax.ResponseHandler;
049    import org.deegree.enterprise.control.ajax.WebEvent;
050    import org.deegree.framework.log.ILogger;
051    import org.deegree.framework.log.LoggerFactory;
052    import org.deegree.framework.util.HttpUtils;
053    import org.deegree.framework.xml.NamespaceContext;
054    import org.deegree.framework.xml.XMLFragment;
055    import org.deegree.framework.xml.XMLTools;
056    import org.deegree.i18n.Messages;
057    import org.deegree.model.spatialschema.Envelope;
058    import org.deegree.model.spatialschema.GeometryFactory;
059    import org.deegree.model.spatialschema.Point;
060    import org.deegree.ogcbase.CommonNamespaces;
061    import org.deegree.portal.Constants;
062    import org.deegree.portal.context.Layer;
063    import org.deegree.portal.context.ViewContext;
064    import org.w3c.dom.Element;
065    import org.xml.sax.SAXException;
066    
067    /**
068     * TODO add class documentation here
069     * 
070     * @author <a href="mailto:name@deegree.org">Andreas Poth</a>
071     * @author last edited by: $Author: apoth $
072     * 
073     * @version $Revision: 24932 $, $Date: 2010-06-17 20:16:34 +0200 (Do, 17 Jun 2010) $
074     */
075    public class PrintWMPSListener extends AbstractListener {
076    
077        private static final ILogger LOG = LoggerFactory.getLogger( PrintWMPSListener.class );
078    
079        private static NamespaceContext nsc = CommonNamespaces.getNamespaceContext();
080    
081        /*
082         * (non-Javadoc)
083         * 
084         * @see
085         * org.deegree.enterprise.control.ajax.AbstractListener#actionPerformed(org.deegree.enterprise.control.ajax.WebEvent
086         * , org.deegree.enterprise.control.ajax.ResponseHandler)
087         */
088        @SuppressWarnings("unchecked")
089        public void actionPerformed( WebEvent event, ResponseHandler responseHandler )
090                                throws IOException {
091            String wmpsAddr = getInitParameter( "WMPS" );
092            List<Layer> visibleLayers = getVisibleLayers( event );
093            // read parameters from request
094            Map<String, Object> parameters = event.getParameter();
095            int dpi = Integer.parseInt( (String) parameters.get( "dpi" ) );
096            boolean legend = new Boolean( (String) parameters.get( "legend" ) );
097            boolean scaleBar = new Boolean( (String) parameters.get( "scale" ) );
098            String template = (String) parameters.get( "template" );
099            String email = (String) parameters.get( "email" );
100            int scaleValue = Integer.parseInt( (String) parameters.get( "scaleValue" ) );
101            String tmp = (String) parameters.get( "bbox" );
102            Envelope bbox = GeometryFactory.createEnvelope( tmp, null );
103            String srs = (String) parameters.get( "srs" );
104            List<Map<String, String>> fields = (List<Map<String, String>>) parameters.get( "fields" );
105            Map<String, String> fieldMap = (Map<String, String>) fields.get( 0 );
106    
107            // create PrintMap request using printmap_template.xml as template
108            XMLFragment printMap = createRequest( visibleLayers, dpi, legend, scaleBar, template, email, scaleValue, bbox,
109                                                  srs, fieldMap );
110    
111            LOG.logDebug( printMap.getAsPrettyString() );
112    
113            // reading initial response from WMPS
114            InputStream is = HttpUtils.performHttpPost( wmpsAddr, printMap.getAsString(), timeout, null, null, "text/xml",
115                                                        null, null ).getResponseBodyAsStream();
116            XMLFragment xml = new XMLFragment();
117            try {
118                xml.load( is, wmpsAddr );
119            } catch ( Exception e ) {
120                LOG.logError( e );
121            }
122            if ( CommonNamespaces.DEEGREEWMPS.toASCIIString().equals( xml.getRootElement().getNamespaceURI() ) ) {
123                responseHandler.writeAndClose( Messages.getMessage( "IGEO_STD_WMPS_REQ_RECEIVED" ) );
124            } else {
125                LOG.logError( xml.getAsPrettyString() );
126                responseHandler.writeAndClose( Messages.getMessage( "IGEO_STD_WMPS_REQ_ERROR" ) );
127            }
128        }
129    
130        /**
131         * @param visibleLayers
132         * @param dpi
133         * @param legend
134         * @param scaleBar
135         * @param template
136         * @param email
137         * @param scaleValue
138         * @param bbox
139         * @param srs
140         * @param fieldMap
141         * @return
142         * @throws IOException
143         */
144        private XMLFragment createRequest( List<Layer> visibleLayers, int dpi, boolean legend, boolean scaleBar,
145                                           String template, String email, int scaleValue, Envelope bbox, String srs,
146                                           Map<String, String> fieldMap )
147                                throws IOException {
148            URL url = PrintWMPSListener.class.getResource( "printmap_template.xml" );
149            XMLFragment printMap = null;
150            try {
151                printMap = new XMLFragment( url );
152            } catch ( SAXException e ) {
153                LOG.logError( e );
154                throw new IOException( "can not parse PrintMap template" );
155            }
156    
157            try {
158                // set bounding box and SRS
159                Element element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(),
160                                                                      "deegreewmps:Center/gml:pos", nsc );
161                Point center = bbox.getCentroid();
162                XMLTools.setNodeValue( element, center.getX() + " " + center.getY() );
163                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:Center", nsc );
164                element.setAttribute( "srsName", srs );
165    
166                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:ScaleDenominator",
167                                                              nsc );
168                XMLTools.setNodeValue( element, Integer.toString( scaleValue ) );
169    
170                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:Legend", nsc );
171                XMLTools.setNodeValue( element, Boolean.toString( legend ) );
172    
173                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:ScaleBar", nsc );
174                XMLTools.setNodeValue( element, Boolean.toString( scaleBar ) );
175    
176                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:Template", nsc );
177                XMLTools.setNodeValue( element, template );
178    
179                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:EMailAddress", nsc );
180                XMLTools.setNodeValue( element, email );
181    
182                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:DPI", nsc );
183                XMLTools.setNodeValue( element, Integer.toString( dpi ) );
184    
185                // set layers to be printed
186                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:Layers", nsc );
187                for ( Layer layer : visibleLayers ) {
188                    Element nl = XMLTools.appendElement( element, CommonNamespaces.SLDNS, "NamedLayer" );
189                    Element l = XMLTools.appendElement( nl, CommonNamespaces.SLDNS, "Name" );
190                    XMLTools.setNodeValue( l, layer.getName() );
191                    Element nst = XMLTools.appendElement( nl, CommonNamespaces.SLDNS, "NamedStyle" );
192                    Element st = XMLTools.appendElement( nst, CommonNamespaces.SLDNS, "Name" );
193                    XMLTools.setNodeValue( st, layer.getStyleList().getCurrentStyle().getName() );
194                }
195    
196                // set free defined text areas
197                element = (Element) XMLTools.getRequiredNode( printMap.getRootElement(), "deegreewmps:TextAreas", nsc );
198                Iterator<String> iter = fieldMap.keySet().iterator();
199                while ( iter.hasNext() ) {
200                    String key = (String) iter.next();
201                    String value = fieldMap.get( key );
202                    if ( value != null && value.trim().length() > 0 ) {
203                        Element ta = XMLTools.appendElement( element, CommonNamespaces.DEEGREEWMPS, "TextArea" );
204                        Element name = XMLTools.appendElement( ta, CommonNamespaces.DEEGREEWMPS, "Name" );
205                        XMLTools.setNodeValue( name, key );
206                        Element text = XMLTools.appendElement( ta, CommonNamespaces.DEEGREEWMPS, "Text" );
207                        XMLTools.setNodeValue( text, value );
208                    }
209                }
210            } catch ( Exception e ) {
211                LOG.logError( e );
212                throw new IOException( "can not set request values" );
213            }
214    
215            return printMap;
216        }
217    
218        private List<Layer> getVisibleLayers( WebEvent event ) {
219            ViewContext vc = (ViewContext) event.getSession().getAttribute( Constants.CURRENTMAPCONTEXT );
220            Layer[] layers = vc.getLayerList().getLayers();
221            List<Layer> visibleLayers = new ArrayList<Layer>();
222            for ( Layer layer : layers ) {
223                if ( !layer.isHidden() ) {
224                    visibleLayers.add( layer );
225                }
226            }
227            Collections.reverse( visibleLayers );
228            return visibleLayers;
229        }
230    
231    }