view rdf/PluginRDFDescription.cpp @ 537:3cc4b7cd2aa5

* Merge from one-fftdataserver-per-fftmodel branch.  This bit of
reworking (which is not described very accurately by the title of
the branch) turns the MatrixFile object into something that either
reads or writes, but not both, and separates the FFT file cache
reader and writer implementations separately.  This allows the
FFT data server to have a single thread owning writers and one reader
per "customer" thread, and for all locking to be vastly simplified
and concentrated in the data server alone (because none of the
classes it makes use of is used in more than one thread at a time).
The result is faster and more trustworthy code.

/* -*- 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 "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;
}

QString
PluginRDFDescription::getOutputUri(QString outputId) const
{
    if (m_outputUriMap.find(outputId) == m_outputUriMap.end()) {
        return "";
    }
    return m_outputUriMap.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;

        m_outputUriMap[outputId] = outputUri;

        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"), "feature");

        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;
}