view rdf/PluginRDFDescription.cpp @ 489:82ab61fa9223

* Reorganise our sparql queries on the basis that Redland must be available, not only optional. So for anything querying the pool of data about plugins, we use a single datastore and model which is initialised at the outset by PluginRDFIndexer and then queried directly; for anything that "reads from a file" (e.g. loading annotations) we query directly using Rasqal, going to the datastore when we need additional plugin-related information. This may improve performance, but mostly it simplifies the code and fixes a serious issue with RDF import in the previous versions (namely that multiple sequential RDF imports would end up sharing the same RDF data pool!)
author Chris Cannam
date Fri, 21 Nov 2008 16:12:29 +0000
parents a82645e788fc
children 81963c51b488
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2008 QMUL.
   
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "PluginRDFDescription.h"

#include "PluginRDFIndexer.h"
#include "SimpleSPARQLQuery.h"

#include "data/fileio/FileSource.h"
#include "data/fileio/CachedFile.h"

#include "base/Profiler.h"

#include "plugin/PluginIdentifier.h"

#include <iostream>
using std::cerr;
using std::endl;

PluginRDFDescription::PluginRDFDescription(QString pluginId) :
    m_pluginId(pluginId),
    m_haveDescription(false)
{
    PluginRDFIndexer *indexer = PluginRDFIndexer::getInstance();
    m_pluginUri = indexer->getURIForPluginId(pluginId);
    if (m_pluginUri == "") {
        cerr << "PluginRDFDescription: WARNING: No RDF description available for plugin ID \""
             << pluginId.toStdString() << "\"" << endl;
    } else {
        // All the data we need should be in our RDF model already:
        // if it's not there, we don't know where to find it anyway
        if (index()) {
            m_haveDescription = true;
        }
    }
}

PluginRDFDescription::~PluginRDFDescription()
{
}

bool
PluginRDFDescription::haveDescription() const
{
    return m_haveDescription;
}

QString
PluginRDFDescription::getPluginName() const
{
    return m_pluginName;
}

QString
PluginRDFDescription::getPluginDescription() const
{
    return m_pluginDescription;
}

QString
PluginRDFDescription::getPluginMaker() const
{
    return m_pluginMaker;
}

QString
PluginRDFDescription::getPluginInfoURL() const
{
    return m_pluginInfoURL;
}

QStringList
PluginRDFDescription::getOutputIds() const
{
    QStringList ids;
    for (OutputDispositionMap::const_iterator i = m_outputDispositions.begin();
         i != m_outputDispositions.end(); ++i) {
        ids.push_back(i->first);
    }
    return ids;
}

QString
PluginRDFDescription::getOutputName(QString outputId) const
{
    if (m_outputNames.find(outputId) == m_outputNames.end()) {
        return "";
    } 
    return m_outputNames.find(outputId)->second;
}

PluginRDFDescription::OutputDisposition
PluginRDFDescription::getOutputDisposition(QString outputId) const
{
    if (m_outputDispositions.find(outputId) == m_outputDispositions.end()) {
        return OutputDispositionUnknown;
    }
    return m_outputDispositions.find(outputId)->second;
}

QString
PluginRDFDescription::getOutputEventTypeURI(QString outputId) const
{
    if (m_outputEventTypeURIMap.find(outputId) ==
        m_outputEventTypeURIMap.end()) {
        return "";
    }
    return m_outputEventTypeURIMap.find(outputId)->second;
}

QString
PluginRDFDescription::getOutputFeatureAttributeURI(QString outputId) const
{
    if (m_outputFeatureAttributeURIMap.find(outputId) ==
        m_outputFeatureAttributeURIMap.end()) {
        return "";
    }
    return m_outputFeatureAttributeURIMap.find(outputId)->second;
}

QString
PluginRDFDescription::getOutputSignalTypeURI(QString outputId) const
{
    if (m_outputSignalTypeURIMap.find(outputId) ==
        m_outputSignalTypeURIMap.end()) {
        return "";
    }
    return m_outputSignalTypeURIMap.find(outputId)->second;
}

QString
PluginRDFDescription::getOutputUnit(QString outputId) const
{
    if (m_outputUnitMap.find(outputId) == m_outputUnitMap.end()) {
        return "";
    }
    return m_outputUnitMap.find(outputId)->second;
}

bool
PluginRDFDescription::index() 
{
    Profiler profiler("PluginRDFDescription::index");

    bool success = true;
    if (!indexMetadata()) success = false;
    if (!indexOutputs()) success = false;

    return success;
}

bool
PluginRDFDescription::indexMetadata()
{
    Profiler profiler("PluginRDFDescription::index");

    SimpleSPARQLQuery::QueryType m = SimpleSPARQLQuery::QueryFromModel;

    QString queryTemplate =
        QString(
            " PREFIX vamp: <http://purl.org/ontology/vamp/> "
            " PREFIX foaf: <http://xmlns.com/foaf/0.1/> "
            " PREFIX dc: <http://purl.org/dc/elements/1.1/> "
            " SELECT ?%3 "
            " WHERE { "
            "   <%1> %2 ?%3 . "
            " }")
        .arg(m_pluginUri);

    SimpleSPARQLQuery::Value v;

    v = SimpleSPARQLQuery::singleResultQuery
        (m, queryTemplate.arg("vamp:name").arg("name"), "name");
    
    if (v.type == SimpleSPARQLQuery::LiteralValue && v.value != "") {
        m_pluginName = v.value;
    }

    v = SimpleSPARQLQuery::singleResultQuery
        (m, queryTemplate.arg("dc:description").arg("description"), "description");
    
    if (v.type == SimpleSPARQLQuery::LiteralValue && v.value != "") {
        m_pluginDescription = v.value;
    }

    v = SimpleSPARQLQuery::singleResultQuery
        (m,
         QString(
            " PREFIX vamp: <http://purl.org/ontology/vamp/> "
            " PREFIX foaf: <http://xmlns.com/foaf/0.1/> "
            " SELECT ?name "
            " WHERE { "
            "   <%1> foaf:maker ?maker . "
            "   ?maker foaf:name ?name . "
            " }")
         .arg(m_pluginUri),
         "name");
    
    if (v.type == SimpleSPARQLQuery::LiteralValue && v.value != "") {
        m_pluginMaker = v.value;
    }

    // If we have a more-information URL for this plugin, then we take
    // that.  Otherwise, a more-information URL for the plugin
    // library would do nicely.  Failing that, we could perhaps use
    // any foaf:page URL at all that appears in the file -- but
    // perhaps that would be unwise

    v = SimpleSPARQLQuery::singleResultQuery
        (m,
         QString(
            " PREFIX vamp: <http://purl.org/ontology/vamp/> "
            " PREFIX foaf: <http://xmlns.com/foaf/0.1/> "
            " SELECT ?page "
            " WHERE { "
            "   <%1> foaf:page ?page . "
            " }")
         .arg(m_pluginUri),
         "page");

    if (v.type == SimpleSPARQLQuery::URIValue && v.value != "") {

        m_pluginInfoURL = v.value;

    } else {

        v = SimpleSPARQLQuery::singleResultQuery
            (m,
             QString(
                " PREFIX vamp: <http://purl.org/ontology/vamp/> "
                " PREFIX foaf: <http://xmlns.com/foaf/0.1/> "
                " SELECT ?page "
                " WHERE { "
                "   ?library vamp:available_plugin <%1> ; "
                "            a vamp:PluginLibrary ; "
                "            foaf:page ?page . "
                " }")
             .arg(m_pluginUri),
             "page");

        if (v.type == SimpleSPARQLQuery::URIValue && v.value != "") {

            m_pluginInfoURL = v.value;
        }
    }

    return true;
}

bool
PluginRDFDescription::indexOutputs()
{
    Profiler profiler("PluginRDFDescription::indexOutputs");
    
    SimpleSPARQLQuery::QueryType m = SimpleSPARQLQuery::QueryFromModel;

    SimpleSPARQLQuery query
        (m,
         QString
         (
             " PREFIX vamp: <http://purl.org/ontology/vamp/> "

             " SELECT ?output ?output_id ?output_type ?unit "

             " WHERE { "

             "   <%1> vamp:output ?output . "

             "   ?output vamp:identifier ?output_id ; "
             "           a ?output_type . "

             "   OPTIONAL { "
             "     ?output vamp:unit ?unit "
             "   } . "

             " } "
             )
         .arg(m_pluginUri));

    SimpleSPARQLQuery::ResultList results = query.execute();

    if (!query.isOK()) {
        cerr << "ERROR: PluginRDFDescription::index: ERROR: Failed to query outputs for <"
             << m_pluginUri.toStdString() << ">: "
             << query.getErrorString().toStdString() << endl;
        return false;
    }

    if (results.empty()) {
        cerr << "ERROR: PluginRDFDescription::indexURL: NOTE: No outputs defined for <"
             << m_pluginUri.toStdString() << ">" << endl;
        return false;
    }

    // Note that an output may appear more than once, if it inherits
    // more than one type (e.g. DenseOutput and QuantizedOutput).  So
    // these results must accumulate

    for (int i = 0; i < results.size(); ++i) {

        QString outputUri = results[i]["output"].value;
        QString outputId = results[i]["output_id"].value;
        QString outputType = results[i]["output_type"].value;

        if (outputType.contains("DenseOutput")) {
            m_outputDispositions[outputId] = OutputDense;
        } else if (outputType.contains("SparseOutput")) {
            m_outputDispositions[outputId] = OutputSparse;
        } else if (outputType.contains("TrackLevelOutput")) {
            m_outputDispositions[outputId] = OutputTrackLevel;
        } else {
            m_outputDispositions[outputId] = OutputDispositionUnknown;
        }
            
        if (results[i]["unit"].type == SimpleSPARQLQuery::LiteralValue) {

            QString unit = results[i]["unit"].value;
            
            if (unit != "") {
                m_outputUnitMap[outputId] = unit;
            }
        }

        SimpleSPARQLQuery::Value v;

        v = SimpleSPARQLQuery::singleResultQuery
            (m, 
             QString(" PREFIX vamp: <http://purl.org/ontology/vamp/> "
                     " PREFIX dc: <http://purl.org/dc/elements/1.1/> "
                     " SELECT ?title "
                     " WHERE { <%2> dc:title ?title } ")
             .arg(outputUri), "title");

        if (v.type == SimpleSPARQLQuery::LiteralValue && v.value != "") {
            m_outputNames[outputId] = v.value;
        }

        QString queryTemplate = 
            QString(" PREFIX vamp: <http://purl.org/ontology/vamp/> "
                    " SELECT ?%3 "
                    " WHERE { <%2> vamp:computes_%3 ?%3 } ")
            .arg(outputUri);

        v = SimpleSPARQLQuery::singleResultQuery
            (m, queryTemplate.arg("event_type"), "event_type");

        if (v.type == SimpleSPARQLQuery::URIValue && v.value != "") {
            m_outputEventTypeURIMap[outputId] = v.value;
        }

        v = SimpleSPARQLQuery::singleResultQuery
            (m, queryTemplate.arg("feature_attribute"), "feature_attribute");

        if (v.type == SimpleSPARQLQuery::URIValue && v.value != "") {
            m_outputFeatureAttributeURIMap[outputId] = v.value;
        }

        v = SimpleSPARQLQuery::singleResultQuery
            (m, queryTemplate.arg("signal_type"), "signal_type");

        if (v.type == SimpleSPARQLQuery::URIValue && v.value != "") {
            m_outputSignalTypeURIMap[outputId] = v.value;
        }
    }

    return true;
}