001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/ogcwebservices/sos/describeplatform/PlatformDescriptionDocument.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.ogcwebservices.sos.describeplatform;
037
038 import java.io.IOException;
039 import java.net.URL;
040 import java.util.ArrayList;
041 import java.util.Hashtable;
042 import java.util.List;
043
044 import javax.xml.transform.TransformerException;
045
046 import org.deegree.datatypes.QualifiedName;
047 import org.deegree.framework.util.StringTools;
048 import org.deegree.framework.xml.XMLFragment;
049 import org.deegree.framework.xml.XMLParsingException;
050 import org.deegree.framework.xml.XMLTools;
051 import org.deegree.framework.xml.XSLTDocument;
052 import org.deegree.ogcwebservices.OGCWebServiceException;
053 import org.deegree.ogcwebservices.sos.ComponentDescriptionDocument;
054 import org.deegree.ogcwebservices.sos.WFSRequestGenerator;
055 import org.deegree.ogcwebservices.sos.WFSRequester;
056 import org.deegree.ogcwebservices.sos.configuration.SOSDeegreeParams;
057 import org.deegree.ogcwebservices.sos.configuration.SourceServerConfiguration;
058 import org.deegree.ogcwebservices.sos.sensorml.Classifier;
059 import org.deegree.ogcwebservices.sos.sensorml.ComponentDescription;
060 import org.deegree.ogcwebservices.sos.sensorml.EngineeringCRS;
061 import org.deegree.ogcwebservices.sos.sensorml.Identifier;
062 import org.deegree.ogcwebservices.sos.sensorml.LocationModel;
063 import org.w3c.dom.Document;
064 import org.w3c.dom.Node;
065 import org.xml.sax.SAXException;
066
067 /**
068 * gets the platform metadata from a xsl transformed wfs result
069 *
070 * @author <a href="mailto:mkulbe@lat-lon.de">Matthias Kulbe </a>
071 *
072 */
073
074 public class PlatformDescriptionDocument extends ComponentDescriptionDocument {
075
076 /**
077 *
078 */
079 private static final long serialVersionUID = 645409071795675313L;
080
081 private static final String XML_TEMPLATE = "DescribePlatformTemplate.xml";
082
083 /**
084 * creates an document from a template file
085 */
086 @Override
087 public void createEmptyDocument()
088 throws IOException, SAXException {
089 URL url = PlatformDescriptionDocument.class.getResource( XML_TEMPLATE );
090 if ( url == null ) {
091 throw new IOException( "The resource '" + XML_TEMPLATE + " could not be found." );
092 }
093 load( url );
094 }
095
096 /**
097 * gets the platform descriptions from a wfs and transform it with a xslt script
098 *
099 * @param deegreeParams
100 * @param typNames
101 * @return the metadata
102 * @throws OGCWebServiceException
103 *
104 */
105 public PlatformMetadata[] getPlatform( SOSDeegreeParams deegreeParams, String[] typNames )
106 throws OGCWebServiceException {
107
108 try {
109
110 // gets the documents from wfs server
111 Document[] docs = getPlatformDescriptionDocuments( deegreeParams, typNames );
112
113 ArrayList<PlatformMetadata> platformMetadata = new ArrayList<PlatformMetadata>( 1000 );
114
115 for ( int d = 0; d < docs.length; d++ ) {
116
117 if ( docs[d] != null ) {
118
119 List<Node> nl = XMLTools.getNodes( docs[d], "sml:Platforms/sml:Platform", nsContext );
120
121 // process all platforms in document
122 for ( int y = 0; y < nl.size(); y++ ) {
123
124 Node platformNode = nl.get( y );
125
126 // get identifiedAs
127 List<Node> identifierList = XMLTools.getNodes( platformNode, "sml:identifiedAs", nsContext );
128 if ( ( identifierList == null ) || ( identifierList.size() <= 0 ) ) {
129 throw new XMLParsingException( "at least one identifiedAs required" );
130
131 }
132 ArrayList<Identifier> identifiers = new ArrayList<Identifier>( identifierList.size() );
133 for ( int i = 0; i < identifierList.size(); i++ ) {
134 identifiers.add( getIdentifiedAs( identifierList.get( i ) ) );
135 }
136
137 // get ClassifiedAs
138 List<Node> classifierList = XMLTools.getNodes( platformNode, "sml:classifiedAs", nsContext );
139 ArrayList<Classifier> classifiers = new ArrayList<Classifier>( classifierList.size() );
140 for ( int i = 0; i < classifierList.size(); i++ ) {
141 classifiers.add( getClassifiedAs( classifierList.get( i ) ) );
142 }
143
144 // get attachedTo
145 String attachedTo = getAttachedTo( XMLTools.getNode( platformNode, "sml:attachedTo", nsContext ) );
146
147 // get hasCRS
148 EngineeringCRS hasCRS = getHasCRS( XMLTools.getNode( platformNode, "sml:hasCRS", nsContext ) );
149
150 // get locatedUsing
151 List<Node> locationModelList = XMLTools.getNodes( platformNode, "sml:locatedUsing", nsContext );
152 ArrayList<LocationModel> locationModels = new ArrayList<LocationModel>(
153 locationModelList.size() );
154 for ( int i = 0; i < locationModelList.size(); i++ ) {
155 locationModels.add( getLocatedUsing( locationModelList.get( i ) ) );
156 }
157
158 // get describedBy
159 ComponentDescription describedBy = getDescribedBy( XMLTools.getNode( platformNode,
160 "sml:describedBy",
161 nsContext ) );
162
163 // get carries
164 List<Node> carriesList = XMLTools.getNodes( platformNode, "sml:carries", nsContext );
165 ArrayList<String> carries = new ArrayList<String>( carriesList.size() );
166 for ( int i = 0; i < carriesList.size(); i++ ) {
167 String s = XMLTools.getRequiredNodeAsString( carriesList.get( i ), "sml:Asset/text()",
168 nsContext );
169 carries.add( s );
170 }
171
172 Identifier[] ids = identifiers.toArray( new Identifier[identifiers.size()] );
173 Classifier[] cls = classifiers.toArray( new Classifier[classifiers.size()] );
174 LocationModel[] lm = locationModels.toArray( new LocationModel[locationModels.size()] );
175 String[] crrs = carries.toArray( new String[carries.size()] );
176 PlatformMetadata pmd = new PlatformMetadata( ids, cls, hasCRS, lm, describedBy, attachedTo,
177 crrs );
178 // add act Metadata to ArrayList
179 platformMetadata.add( pmd );
180 }
181
182 }
183 }
184
185 // return the Array with Sensormetadata
186 PlatformMetadata[] pfmd = new PlatformMetadata[platformMetadata.size()];
187 return platformMetadata.toArray( pfmd );
188
189 } catch ( Exception e ) {
190 e.printStackTrace();
191 throw new OGCWebServiceException( "sos webservice failure" );
192 }
193 }
194
195 /**
196 * requests all servers which serves one of the requested platforms and returns the transformed
197 * result docs
198 *
199 */
200 private Document[] getPlatformDescriptionDocuments( SOSDeegreeParams dp, String[] typNames )
201 throws IOException, SAXException, XMLParsingException, TransformerException,
202 OGCWebServiceException {
203
204 ArrayList<Document> resultDocuments = new ArrayList<Document>();
205
206 Hashtable<String, ArrayList<String>> servers = new Hashtable<String, ArrayList<String>>();
207
208 for ( int t = 0; t < typNames.length; t++ ) {
209 String sourceServerId = dp.getPlatformConfiguration( typNames[t] ).getSourceServerId();
210
211 if ( servers.containsKey( sourceServerId ) ) {
212 servers.get( sourceServerId ).add( typNames[t] );
213 } else {
214 ArrayList<String> temp = new ArrayList<String>();
215 temp.add( typNames[t] );
216 servers.put( sourceServerId, temp );
217 }
218
219 }
220
221 String[] keySet = servers.keySet().toArray( new String[servers.keySet().size()] );
222
223 // request all servers from servers hashtable
224 for ( int i = 0; i < keySet.length; i++ ) {
225
226 List<String> ids = servers.get( keySet[i] );
227
228 String[] idProps = new String[ids.size()];
229 for ( int a = 0; a < ids.size(); a++ ) {
230 idProps[a] = dp.getPlatformConfiguration( ids.get( a ) ).getIdPropertyValue();
231 }
232
233 QualifiedName pdft = dp.getSourceServerConfiguration( keySet[i] ).getPlatformDescriptionFeatureType();
234 QualifiedName pdid = dp.getSourceServerConfiguration( keySet[i] ).getPlatformDescriptionIdPropertyName();
235 Document request = WFSRequestGenerator.createIsLikeOperationWFSRequest( idProps, pdft, pdid );
236
237 SourceServerConfiguration ssc = dp.getSourceServerConfiguration( keySet[i] );
238
239 Document resultDoc = null;
240 try {
241 resultDoc = WFSRequester.sendWFSrequest( request, ssc.getDataService() );
242 } catch ( Exception e ) {
243 throw new OGCWebServiceException( this.getClass().getName(), "could not get platform data from WFS "
244 + StringTools.stackTraceToString( e ) );
245 }
246 if ( resultDoc != null ) {
247 URL pdxs = dp.getSourceServerConfiguration( keySet[i] ).getPlatformDescriptionXSLTScriptSource();
248 XSLTDocument sheet = new XSLTDocument();
249 sheet.load( pdxs );
250 XMLFragment input = new XMLFragment();
251 input.setRootElement( resultDoc.getDocumentElement() );
252 XMLFragment result = sheet.transform( input );
253 resultDocuments.add( result.getRootElement().getOwnerDocument() );
254 }
255
256 }
257
258 return resultDocuments.toArray( new Document[resultDocuments.size()] );
259 }
260
261 }