    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_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    }