Beispiel #1
0
//
// We don't really care if the indexing level is in the incorrect graph
//
void Nepomuk2::updateIndexingLevel(const QUrl& uri, int level)
{
    QString uriN3 = Soprano::Node::resourceToN3( uri );

    QString query = QString::fromLatin1("select ?g ?l where { graph ?g { %1 kext:indexingLevel ?l . } }")
                    .arg ( uriN3 );
    Soprano::Model* model = ResourceManager::instance()->mainModel();
    Soprano::QueryResultIterator it = model->executeQuery( query, Soprano::Query::QueryLanguageSparqlNoInference );

    QUrl graph;
    Soprano::Node prevLevel;
    if( it.next() ) {
        graph = it[0].uri();
        prevLevel = it[1];
        it.close();
    }

    if( !graph.isEmpty() ) {
        QString graphN3 = Soprano::Node::resourceToN3( graph );
        QString removeCommand = QString::fromLatin1("sparql delete { graph %1 { %2 kext:indexingLevel %3 . } }")
                                .arg( graphN3, uriN3, prevLevel.toN3() );
        model->executeQuery( removeCommand, Soprano::Query::QueryLanguageUser, QLatin1String("sql") );

        QString insertCommand = QString::fromLatin1("sparql insert { graph %1 { %2 kext:indexingLevel %3 . } }")
                                .arg( graphN3, uriN3, Soprano::Node::literalToN3(level) );
        model->executeQuery( insertCommand, Soprano::Query::QueryLanguageUser, QLatin1String("sql") );
    }
    // Practically, this should never happen, but still
    else {
        QScopedPointer<KJob> job( Nepomuk2::setProperty( QList<QUrl>() << uri, KExt::indexingLevel(),
                                                                QVariantList() << QVariant(level) ) );
        job->setAutoDelete(false);
        job->exec();
    }
}
Beispiel #2
0
void Worker::run()
{
    m_canceled = false;
    m_errorText.truncate( 0 );

    Soprano::Model* model = Soprano::createModel( Soprano::BackendSettings() << Soprano::BackendSetting( Soprano::BackendOptionStorageMemory ) );
    if ( !model ) {
        m_errorText = i18n( "Failed to create Soprano memory model. Most likely the installation misses Soprano backend plugins" );
        return;
    }

    model->addStatements( m_data.toList() );

    // select all instances that do not have a subject -> these should be the extracted entities
    Soprano::QueryResultIterator it = model->executeQuery( QString::fromLatin1( "select * where { "
                                                                                "?r a ?type . "
                                                                                "OPTIONAL { ?r <http://s.opencalais.com/1/pred/subject> ?sub . } . "
                                                                                "FILTER(!bound(?sub)) . "
                                                                                "}" ),
                                                           Soprano::Query::QueryLanguageSparql );
    while ( !m_canceled && it.next() ) {
        Soprano::Node r = it["r"];
        Soprano::Graph graph;
        Soprano::QueryResultIterator it2 = model->executeQuery( QString::fromLatin1( "construct { ?entity ?ep ?eo . ?rel ?relp ?relo . } "
                                                                                     "where { "
                                                                                     "?entity <http://s.opencalais.com/1/pred/subject> %1 . "
                                                                                     "?entity ?ep ?eo . "
                                                                                     "?rel a <http://s.opencalais.com/1/type/sys/RelevanceInfo> . "
                                                                                     "?rel <http://s.opencalais.com/1/pred/subject> %1 . "
                                                                                     "?rel ?relp ?relo . "
                                                                                     "}" )
                                                                .arg( r.toN3() ),
                                                                Soprano::Query::QueryLanguageSparql );
        while ( !m_canceled && it2.next() ) {
            graph << it2.currentStatement();
        }

        if ( m_canceled )
            break;

        it2 = model->executeQuery( QString::fromLatin1( "select ?name ?rel ?type ?offset ?length where { "
                                                        "%1 <http://s.opencalais.com/1/pred/name> ?name . "
                                                        "%1 a ?type . "
                                                        "?relInfo a <http://s.opencalais.com/1/type/sys/RelevanceInfo> . "
                                                        "?relInfo <http://s.opencalais.com/1/pred/subject> %1 . "
                                                        "?relInfo <http://s.opencalais.com/1/pred/relevance> ?rel . "
                                                        "?info a <http://s.opencalais.com/1/type/sys/InstanceInfo> . "
                                                        "?info <http://s.opencalais.com/1/pred/subject> %1 . "
                                                        "?info <http://s.opencalais.com/1/pred/offset> ?offset . "
                                                        "?info <http://s.opencalais.com/1/pred/length> ?length . "
                                                        "}" )
                                   .arg( r.toN3() ),
                                   Soprano::Query::QueryLanguageSparql );
        if ( !m_canceled && it2.next() ) {
            Nepomuk::Types::Class type( m_plugin->matchPimoType( it2["type"].uri() ) );
            QString name = it2["name"].toString();

            // FIXME: actually the opencalais resource should be used as the pimo:hasOtherRepresentation of the pimo thing
            //        but that would mean that Entity needs more information or the graph needs to be really used
            Scribo::Entity entity( name, type, graph );
            do {
                double rel = it2["rel"].literal().toDouble();
                int offset = it2["offset"].literal().toInt();
                int length = it2["length"].literal().toInt();

                Scribo::TextOccurrence oc;
                oc.setStartPos( offset );
                oc.setLength( length );
                oc.setRelevance( rel );
                entity.addOccurrence( oc );

                kDebug() << type << type.label() << name << rel << offset << length;
            } while ( !m_canceled && it2.next() );

            if ( m_canceled )
                break;

            addNewMatch( entity );

            // find relations for the entity
            Soprano::QueryResultIterator it3 = model->executeQuery( QString::fromLatin1( "select ?verb ?offset ?length ?exact where { "
                                                                                         "?s a <http://s.opencalais.com/1/type/em/r/GenericRelations> . "
                                                                                         "?s <http://s.opencalais.com/1/pred/relationsubject> %1 . "
                                                                                         "?s <http://s.opencalais.com/1/pred/verb> ?verb . "
                                                                                         "?info a <http://s.opencalais.com/1/type/sys/InstanceInfo> . "
                                                                                         "?info <http://s.opencalais.com/1/pred/subject> ?s . "
                                                                                         "?info <http://s.opencalais.com/1/pred/offset> ?offset . "
                                                                                         "?info <http://s.opencalais.com/1/pred/length> ?length . "
                                                                                         "?info <http://s.opencalais.com/1/pred/exact> ?exact . "
                                                                                         "}" )
                                                                    .arg( r.toN3() ),
                                                                    Soprano::Query::QueryLanguageSparql );
            if ( !m_canceled && it3.next() ) {
                QString verb = it3["verb"].toString();
                QString exact = it3["exact"].toString();
                int offset = it3["offset"].literal().toInt();
                int length = it3["length"].literal().toInt();

                // FIXME: get the graph
                Scribo::Statement s( verb, entity, exact, Soprano::Graph() );

                Scribo::TextOccurrence oc;
                oc.setStartPos( offset );
                oc.setLength( length );
                s.addOccurrence( oc );

                addNewMatch( s );
            }
        }
    }

    delete model;
}